Small caliber stainless steel flange is widely used

Small caliber stainless steel flange has been applied in various fields. According to the different application scope of small caliber stainless steel flange in use, the environment needed to be used is different, and small caliber stainless steel flange needs to be used in accordance with certain conditions.

　　The 1/2" Small caliber stainless steel flange has the corresponding rigidity and elasticity requirements and reasonable butt welding thinning transition. The distance between the weld joint and the joint surface is small, and the joint surface is free from welding temperature distortion. It adopts a relatively complex cough trumpet structure. It is suitable for pipelines with large fluctuation of pressure or temperature, pipelines with high, high and low temperature, and small caliber stainless steel flange. Connection; in the pipeline link plays an important role and value, but in use must ensure that the nominal pressure in a certain range.

　　The sealing surface of small caliber stainless steel flange can be made into three types: smooth, concave-convex and mortise-groove. The application of smooth small caliber stainless steel flange. It is mostly used in mild medium conditions, such as low-pressure non-purified compressed air and low-pressure circulating water. Its advantage is that the price is cheaper. Small caliber stainless steel flanges are suitable for pipelines with small fluctuations in pressure or temperature, or pipelines with high, high and low temperatures.

　　They are also used for pipelines conveying expensive, flammable and explosive media. The small caliber stainless steel flange is butt-welded to the flange and pipeline. The weld is similar to pipeline and pipeline welding. Generally, argon arc welding is used to bottom the small caliber stainless steel flange, manual welding is used to cover the flange, and double-sided welding is used only when the diameter of the pipe is large.

Superior hydraulic conditions for large diameter spiral steel pipe

Large diameter spiral steel pipe is not only anti-corrosion, but also anti-scaling. After actual observation, the cement mortar lining is even and smooth, covering all the concave and convex inner wall of spiral steel pipe and welding seam. The surface of cement mortar lining can form a layer of slippery putty containing manganese, which can reduce friction resistance. Its roughness coefficient is about 0.012, and API 5L Large Diameter Spiral Steel Pipe tends to decrease with the extension of service life. Therefore, cement mortar lining is conducive to improving the water delivery capacity of spiral steel pipe, saving energy and reducing consumption.

　　When spiral steel pipe needs internal corrosion protection, cement mortar lining should be considered first. Cement mortar lining separates the inner wall of spiral steel pipe from water or air to form a dense protective layer, thus inhibiting the oxidation, corrosion and scaling of the inner wall of spiral steel pipe. Compared with other anticorrosive coatings, cement mortar and spiral steel pipe inner wall have stronger bonding force, because the hydration of cement particles forms gel body, which produces bonding force on the inner wall of spiral steel pipe; when cement mortar hardens, the volume shrinks and tightens; when it adheres to the inner wall of spiral steel pipe, it produces friction force; when the inner wall of spiral steel pipe is uneven, it produces bonding force between cement mortar and steel pipe inner wall. Mechanical bite cooperation

Shengtian Group specializes in the production of high-quality pipe fittings

Recently, due to the rising raw materials in the steel market, the prices of pipe fittings ,flange and steel pipes have fluctuated. An old customer from Indonesia has just ordered a batch of ASME B16.11 Alloy Steel A182 F11 Socket Weld Fitting Tee in our factory. Although the price is expensive, but also failed to prevent customers from placing orders to us, the reason is simple, because our quality is guaranteed.

　　Some customers may cancel the cooperation with us as soon as they hear about the high price of our factory because of the same products. But we will find us again and cooperate with us in the future. Why is that? Or because our quality is too good. All pipe fittings, flanges and steel pipes produced by Shengtian Group are cooperating with customers on the basis of quality assurance. Because if you want to use high quality pipe fittings, please do not hesitate to contact us. Because in our factory, quality is always the first.

Heat Treatment Technology For Large-Caliber Carbon Steel Reducer

In the process of shrinkage or expansion deformation pressing of carbon steel reducer, cold pressing or hot pressing should be adopted according to the different material and diameter variation of the pipe fittings. Usually, cold pressing should be adopted as far as possible, but in the case of severe hardening caused by multiple diameter variation, hot pressing should be adopted for the case of thick wall or alloy steel material. For tube blanks Large-Caliber Seamless WP 321 Concentric Carbon Steel Reducer, the inner die is used to expand the diameter along the inner diameter of the tube blank. The expanding process mainly solves the problem that the larger end is not easy to shrink. Sometimes, according to the forming requirements of materials and products, the methods of expanding and shrinking are combined.

　　Large caliber carbon steel reducer have wide adaptability to materials and are suitable for materials of low carbon steel, alloy steel and stainless steel. Especially for large caliber carbon steel reducer with large diameter and thick pipe wall, this forming process is usually adopted. In addition to using steel pipe as raw material to produce large caliber carbon steel reducer.Large caliber carbon steel reducer can also be produced by sheet metal stamping process. The drawing die used for drawing is designed according to the size of the inner surface of the large caliber carbon steel reducer, and the blanked steel plate is stamped and stretched by the die.

Brief introduction of carbon steel tee

Carbon steel tee wear-resistant material is the core of the new material field. It plays an important role in promoting and supporting the development of high and new technology. In the field of global new material research, wear-resistant material accounts for about 85%. With the advent of the information age, special wear-resistant materials play an important role in promoting and supporting the development of high-tech. 1/2" Small Caliber Carbon Steel Butt Welding Pipe Fitting Tee is the key materials in the fields of information, biology, energy, environmental protection, space and other high-tech fields in the 21st century. Carbon steel tee have become the focus of research and development in the field of new materials all over the world, and also the hot spot of strategic competition in the development of high-tech in the world. In view of the important position of wear-resistant materials, all countries in the world attach great importance to the research of wear-resistant materials technology.

　　Carbon steel tee materials need some special raw materials for production. These raw materials should be strictly selected and controlled. The raw materials should be selected properly. Otherwise, the quality of carbon steel tee will not be guaranteed.

　　Carbon steel tees are made of different materials, producing different specifications and models, according to different scales, to ensure that the output of carbon steel tees adapted to different industries and positions. Carbon steel tee has a smooth appearance, a better aesthetic and texture, so that users can have a good feeling in use, will not produce a sense of disgust.

　　Carbon steel tee is widely used in petroleum, chemical industry, nuclear power plant, food manufacturing, construction, shipbuilding, paper making, medicine and other industries. It has different uses in different industries and shows its value in various industries.

Heat treatment technology of stainless steel reducer

In the process of reducing or expanding the diameter of pipe fittings reducer with different diameters, cold pressing or hot pressing should be adopted according to the different materials and changing the diameters of pipe fittings reducer. The tube blank smaller than the large end diameter of the different diameter reducer is formed by expanding along the inner diameter of the tube blank with an internal stamping die.

　　The tonnage of the equipment needed for forming the different-diameter pipe is reduced because the 304 Welding Pipe Fittings Eccentric Stainless Steel Reducer is pressed after heating. The pipe tee is suitable for low-carbon steel, alloy steel and stainless steel, especially for the pipe fitting reducer with large diameter and thick wall. The different diameter pipes of door specifications can also be produced by stamping with steel plates. The drawing die is designed according to the inner surface dimensions of the different diameter pipes, and the blanked steel plate is stamped and drawn with the stamping die.

Hot pressing technology of stainless steel cap

For the stainless steel cap of the hot-pressing, its initial temperature is 930-950 C hot-pressing temperature, the final pressure temperature should not be lower than 850 C, if the temperature dropped to close to 850 C still can not be pressed molding, should be quickly back to the furnace after heating and pressing. In order to avoid the decrease of bonding strength and corrosion resistance of clad steel sheet, the heating time should be shortened as far as possible. The holding time should be controlled within 20 minutes and the reheating times Stainless Steel Caps should not exceed 2 times. The workpiece should be heated rapidly or cooled at 550~850 C.

　　(1) In order to raise the heating speed of the workpiece and ensure uniform heating, the workpiece must be heated to 380 C before entering the furnace. The other workpieces should not be heated at the same time in the furnace, and the workpiece can reach 930 950 C within 15 minutes by properly adjusting the injection rate.

　　(2) heating the workpiece at the same time, preheating the die to 450~550 C.

　　(3) When the workpiece is discharged from the furnace, the preheated die is placed in the position of the press, and then the workpiece is quickly sent to the die for pressing. The cooling rate of the workpiece is slowed down by the heat of the die. Butt Welding sch40 Pipe Fitting stainless Steel Caps is controlled within 3 minutes from discharging to pressing to ensure that the final pressure temperature is higher than 850 C.

　　(4) starting from 380 degrees centigrade and heating to 930~950 C, the workpiece can be released from 930~950 C.

　　(5) In order to avoid the intergranular corrosion tendency of the cladding material, two large fans of 600-800mm can be used to blow the workpiece at the same time after the workpiece is pressed and formed, so that Stainless Steel Caps can be reduced to below 550 C within 3 minutes.

Connection mode between pipe bend and pipeline

　Pipe bend is usually used to connect with pipeline, which is mainly used to change the direction of pipeline. Therefore, it is necessary to know how to use the connection in various situations when carrying out pipeline construction.

　　1. Welding: All pressure pipes, such as gas, steam, air and vacuum pipes, should be welded as far as possible. Electric welding is used for pipe bend diameter greater than 32 mm and thickness more than 4 mm, and gas welding is used for pipe thickness less than 3.5 mm. The compensator should not be welded.

　　2. Socket and socket welding: Pipeline connection with A234 WPB Seamless Carbon Steel Pipe Bend should be replaced by socket and socket welding as far as possible. The structure is reliable, high pressure resistance and convenient construction.

　　3. Flange connection: It is suitable for connecting large diameter pipe bend and high sealing pipe, such as vacuum pipe, etc. It is also suitable for connecting glass, plastics, valves and pipes or equipment.

　　4. Thread connection: generally applicable to pipe bend less than 50 mm (indoor open-coated upper water pipe can be adopted less than 150 mm), working pressure less than 1.0 MPa, medium temperature less than 100 C of welded steel pipe, galvanized welded steel pipe or rigid polyvinyl chloride plastic pipe and pipe or threaded valve, pipe connection.

　　5. Socket connection: suitable for buried or wall-laid water supply and drainage pipes, such as cast iron pipes, ceramic pipes, asbestos cement pipes, pipe bend, valves connection. Asbestos cement, asphalt matte and cement mortar are used as sealing materials. The working pressure is less than 0.3 MPa and the medium temperature is less than 60 C.

　　6. Socket bonding: It is suitable for all kinds of pipes to connect with pipes, valves and fittings. Adhesives are applied to the outside surface of the pipe, and then inserted into the socket. After solidification, the socket is integrated, which is easy to construct and has good sealing.

　　7. Sleeve connection: It is suitable for the connection of metal pipe with metal pipe or non-metal pipe or valve with diameter less than 42mm. A gasket is added in the middle. It is convenient to construct and easy to disassemble. Pipe bend is generally used in instruments, control systems and other places.

　　8. Hoop connection: It is suitable for clean materials. It has the advantages of convenient assembly and disassembly, safety and reliability, economy and durability.

Principle analysis of blind flange sealing

Blind flange are usually used with flange gaskets, but wear occurs after a long time of use. This is due to the creep relaxation of sealing gaskets and bolts, which makes the residual stress on gaskets decrease gradually, and the sealing reliability of Stainless Steel B16.5 Class 300 Forged Blind Flange decreases gradually, and eventually leads to leakage failure. Therefore, we must understand the principle of stainless steel blind flange.

　　The main function of blind flange joint in pressure vessel and pressure pipeline is connection and sealing. The failure of blind flange is not due to strength problem, but due to the combined moment of bolt load, gasket reaction force and medium pressure, the deformation is caused by insufficient stiffness, which makes the pressure of gasket uneven, resulting in leakage of blind flange. Therefore, controlling the stiffness and deformation of blind flange is the key to flange.

　　In addition, because the factors involved in load and deformation of blind flange are relatively complex, it can only be indirectly reflected by experience and blind flange stress calculation for a long time. The calculation method of blind flange stiffness has been included in foreign codes, while the standards and regulations of vessels in China are formulated to ensure the safe operation of pressure vessels, and the safety of pressure vessels has become the goal. A pronoun for preventing strength failure or brittle fracture. Therefore, the requirement of blind flange material and the choice of gasket are the important guarantee of sealing.

Sealing Conditions of weld neck flanges

Weld neck flanges connections need to be used with bolts, such as forged weld neck flanges with holes on it, bolts can be used to make the weld neck flanges tight, because gaskets are placed between the sealing surfaces of two weld neck flanges, after tightening the nut, the specific pressure on the surface of gaskets reaches a certain value, then deforms, and fills the bumps on the sealing surface to make the connection. Keep tight and tightly sealed.

　　Meanwhile, the ANSI B16.5 Stainless Steel CL600 RF Weld Neck Flange connection is a kind of detachable connection. Container weld neck flanges and stainless steel weld neck flanges can be divided according to the components connected. According to the structure type, there are integral weld neck flanges, looper weld neck flanges and thread flange. Weld neck flanges and butt welding flange are common integral flanges. Weld neck flanges has poor rigidity, which is suitable for pressure P < 4 MPa occasion;weld neck flanges is also called high neck flange, which has high rigidity and is suitable for high pressure and temperature occasions.

　　In addition, weld neck flanges is a flange connected with equipment or pipeline through fillet weld. Weld neck flanges is also called lap welding flange. Weld neck flanges is connected with pipeline by inserting the pipe into the inner hole of the weld neck flanges to the appropriate position, and then overlapping welding. Weld neck flanges is suitable for pipeline system with low pressure level and low pressure fluctuation, vibration and vibration. Weld neck flanges is widely used because of its easy alignment and low cost in welding and assembling.

Which method can measure socket flange corrosion

The use of socket flange in industrial structural parts mainly improves the function of connection and keeps the sealing of pipelines leak-free. However, many socket flange will have their own corrosion aging after a period of time, thus losing the effect of sealing. Therefore, it is necessary to regularly test the socket flange for corrosion protection.

　　The socket flange should be maintained and inspected regularly. After corrosion, the pipe wall of the ANSI B16.5 SS 316 CL300 RF Socket Flange becomes thinner and local pits and pits appear. The causes and modes of internal corrosion of stainless steel socket flange need to be carried out in accordance with certain ways and principles. Flux leakage method and ultrasonic detection method are widely used in socket flange corrosion detection at home and abroad.

　　The ultrasonic method is to measure the thickness of corroded pipe wall by using the principle of pulse reflection of ultrasonic wave. The basic principle of magnetic flux leakage method is based on the high permeability of ferromagnetic materials. The permeability of socket flange corrosion defect is far less than that of socket flange. The socket flange is magnetized under the action of external magnetic field. When there is no flange defect, most of the magnetic lines pass through the steel pipe, and then the magnetic lines are evenly distributed. When there are defects in the socket flange, the magnetic lines occur. Bending, and some of the magnetic lines leak out of the surface of the steel pipe. The defect can be judged by detecting the leakage flux escaped from the surface of the magnetized socket flange.

　　In addition, the probe emits ultrasonic pulse vertically to the inner wall of the socket flange. The probe first receives the reflected pulse from the inner surface of the tube wall, and then the ultrasonic probe receives the reflected pulse from the outer surface of the tube wall. The distance between the reflected pulse and the inner surface reflects the thickness of the tube wall. Elbow in the actual detection needs to be carried out according to the actual situation and instructions, according to the ultrasonic method can test a good way.

　　The ultrasonic testing method is also suitable for thickness measurement and metal properties measurement of other metal structures.

Scope of application of welded steel pipe

Spiral welded steel pipe is a kind of low carbon structural steel or low alloy structural steel strip coiled into billet according to a certain helix angle, and then welded together to make the pipe seam. It can produce large diameter spiral welded steel pipe with narrow strip. Spiral welded steel pipe is mainly used for oil and natural gas pipeline, and its specification is expressed by outer diameter and wall thickness.

　　Spiral welded steel pipes with one-side welding and two-side welding, welded steel pipes should ensure that the hydraulic test, weld tensile strength and cold bending performance to meet the requirements.

　　Slag inclusion in welded steel pipe is slag left in the weld seam. Theoretically, there are three main reasons for slag inclusion in submerged arc automatic welding seam: (1) more inclusions in raw materials; (2) interlayer cleaning is not clean during multi-layer welding; (3) improper selection of welding parameters is not conducive to slag floating.

inspection for seamless steel pipe

Seamless steel pipe is a kind of high precision steel tube material after cold drawing or hot rolling. Because the inner and outer walls of seamless steel pipe have no oxide layer, no leakage under high pressure, high precision, high finish, no deformation in cold bending, flattening and no cracks, magnetic particle testing or penetration testing can effectively find surface cracks, folding, heavy skin, wrinkles, pinholes and other surface defects. For ferromagnetic materials, magnetic particle testing should be preferred because of its high detection sensitivity; for non-ferromagnetic materials, such as stainless steel seamless steel pipe, penetration testing method should be used.

　　When the reserved resection margin at both ends is small, due to the structural reasons of the detection device, sometimes the two ends can not be effectively detected, and the end is the most likely place to have cracks or other defects. If there is a potential crack tendency at the end, the welding heat effect during installation may also cause the potential crack propagation. Therefore, attention should also be paid to the detection of a certain area of  EN 10025 S235JR Seamless Pipe, timely detection of the expansion of pipe end defects.

　　For on-line use of austenitic seamless steel pipes, when the insulation is damaged or there may be infiltration of rain water, attention should be paid to penetration testing to find stress corrosion cracks or pitting corrosion defects.

Where do rectangular hollow sections usually be used?

Now hollow sections is used in many industries. It is a kind of hollow sections. After special treatment, the finished product can be used in many places. So hollow sections is an indispensable profile in the construction industry. What other industries will use square pipe besides the construction industry? Where is the hollow sections commonly used?

　　25x50 Galvanized Square Rectangle Steel Hollow Section are widely used. Heating hollow sections are rectangular pipes, through which water or steam can be transported to make our indoor temperature higher. This type of rectangular pipes can only be used for this low pressure fluid. In addition, hollow sections are also used in some mechanical industries, which are made of stainless steel.

　　In many industries, square hollow sections plays different roles, so for square hollow sections in different industries, it has its own standard number. Different standard number square hollow sections plays different roles. For people who often use square tube, they must be very clear about this point, so when they use square hollow sections, they have their own standard number. Wait, we must not mess up, otherwise it will not play its greatest role.

　　Of course, we still have to choose to buy good quality, and how to judge its quality is by looking at its hardness.

　　According to how much hardness it can withstand, the hardness value of the hollow sections can not be too hard or too soft. When purchasing, we should not buy some inferior quality rectangular tubes for the sake of cheapness. Otherwise, unpredictable dangers may occur in the process of application.

Important position of oil pipeline

Oil pipeline is a kind of steel pipe used to support the wall of oil and gas wells to ensure the normal operation of the whole oil well after drilling and completion. According to different drilling depth and geological conditions, each well should use several layers of casing. Cement cementing should be used after oil pipeline running down well. It is different from tubing and oil pipeline and can not be reused. It is a disposable consumable material. Therefore, the oil pipeline consumption accounts for more than 70% of the total oil pipe.

　　Petroleum industry is a large number of industries that use oil pipeline. Oil pipeline play an important role in the petroleum industry.

　　1, the huge volume of API 5L X70 LSAW Carbon Steel Oil Pipeline, the cost of money, the cost savings and the potential to reduce costs are enormous. The consumption of oil pipes can be calculated according to the annual drilling scale. According to the specific conditions in China, 62 kg of tubing is needed for every 1 m of drilling, including 48 kg of casing and 10 kg of tubing. Drill pipe 3kg, drill collar 0.5kg;

　　2. The mechanical and environmental behavior of oil pipeline has an important influence on adopting advanced technology and increasing production efficiency in petroleum industry.

　　3, the loss of oil pipeline failure is huge, and its safety, reliability and service life are of great importance to the petroleum industry.

Matters needing attention in the use of seamless steel pipe

The seamless steel pipe, which is made of whole metal and has no joints on the surface, is called seamless steel pipe.

　　In the ordinary use process, ASME B36.10M 16 Inch Seamless Steel Pipe should pay attention to the following points:

　　Construction preparation for seamless steel pipe before use

　　Seamless steel pipe trench should be excavated, pipe well bricklaying completed, the various types of seamless steel pipe needed in place, all kinds of tools needed, including welding machine, cutting machine, hammer, polisher and other ready, only do a series of preparatory work to start installation.

　　Installation of seamless steel pipe.

　　Seamless steel pipe positioning is carried out according to the drawing design, pipe support is prefabricated according to the site situation, and then the material is cut according to the design and site, then the groove is ground with a grinder, and then the welding is carried out.The vertical installation of riser should be less than 3 mm per meter, and the deviation of horizontal installation should be less than 1 mm.

Production standard of flange

China Standard: GB/T9112-2000 (GB9113.1-2000-GB9123.4-2000)

　　American Standards: ANSI B16.5 Class150, 300, 600, 900, 1500 (WN, SO, BL, TH, LJ, SW)

　　Japan Standards: JIS 5K, 10K, 16K, 20K (PL, SO, BL, WN, TH, SW)

　　German Standards: DIN2573, 2572, 2631, 2576, 2632, 2633, 2543, 2634, 2545 (PL, SO, WN, BL, TH)

　　Ministry of Chemical Industry Standards: HG5010-52-HG5028-58, HGJ44-91-HGJ65-91, HG20592-97, HG20615-97

　　Ministry of Machinery Standards: JB81-59-JB86-59, JB/T79-94-JB/T86-94, JB/T74-1994

　　Pressure Vessel Standards: JB1157-82~JB1160-82, JB4700-2000~JB4707-2000 B16.47A/B B16.39 B16.48

　　Hebei Shengtian Group can customize different standard flanges（Include GOST 12820-80 Welding Stainless Steel Plate Flange） according to different needs of customers. We always serve every customer with high quality products. Welcome to visit our factory.

Scope of application of threaded flange

Threaded flange is suitable for processing bolt holes and water lines in pipelines with large fluctuation of pressure or temperature or pipelines with high temperature, high pressure and low temperature. Manufacture High Quality Stainless Steel Class 300 Threaded Flange thus produced is called threaded flange. Our company saves cost according to the requirement of continuous improvement. The material of this kind of threaded flange is carbon steel flange blank, which is also attributed to the production of threaded flange, threaded flange left over from the bulk. It can be packed specially according to customers'requirements.

　　Others call it flange cover or threaded flange, so the sealing principle of flat threaded flange is constantly improving and perfecting. Distribution of goods by means of transportation serves the vast number of new and old customers. When the pipe material is special and can withstand hot air, the practical properties are also different. Welding guide and link weight guide of threaded flange in use need to be processed according to certain ways and methods before using the technology of water line and bolt hole.

　　The corresponding threaded flange shape basically covers all specifications, which will cause certain difficulties in transportation. Sales has a group of professional engineers and technicians this type of equipment and valves commonly used. Under normal conditions, water quenching is often used for threaded flange. As bolts, gaskets and threaded flanges are loosely rolled, flanges are also used in pipelines to transport expensive, flammable and explosive media.

Relevant characteristics of application of carbon steel flange

Carbon steel flange is the connecting device of two large-caliber pipelines, usually two carbon steel flanges with a number of fastening bolts.ASME B16.5 Carbon Steel Forged Blind Flange is a disc-shaped part, which is most common in pipeline engineering. Flanges are used in pairs. Carbon steel flange is a kind of flange made of carbon steel. Low carbon steel has good plasticity and low strength. Flange connections may need to withstand high tensile, compressive, torsional and shear strength. Carbon steel flange is a better choice.

　　In pipeline engineering, carbon steel flanges are mainly used for the connection of steel pipes. In pipelines that need to be connected, one flange can be installed in all kinds. In low pressure pipelines, wire flanges can be used. Welded flanges can be used under pressure of more than 4 kg. Sealing points are added between the two flanges, and then bolted. Carbon steel flanges with different pressures have different thicknesses and bolts. When pumps and valves are connected to pipes, parts of these equipment are also made into corresponding flange shapes, also known as flange connections.

　　In the family, the diameter of the pipeline is small, and it is low pressure, so the carbon steel flange connection can not be seen. If you are in a boiler room or production site, there are flanged pipes and equipment everywhere.

　　Carbon steel flange is widely used in petroleum and natural gas pipelines, oil refining cracking units and nuclear industry. It has compact structure, reliable sealing, simple structure and convenient maintenance. The sealing surface and spherical surface are often in closed state. It is not easy to be eroded by medium and easy to operate and maintain. It is suitable for water, solvent, acid and natural gas.

Cautions for use of stainless steel weld neck flange

1. In order to prevent interocular corrosion caused by EN1092 Stainless Steel Forged Weld Neck Flange cover heating, the welding current should not be too large, about 20% less than carbon steel electrode, the arc should not be too long, the interlayer cooling should be fast, and the narrow bead should be suitable.

　　2. When using the electrode, it should be kept dry. The Ti-Ca type should be dried at 150 ~250 ~C for 1 hour. The low-a hydrogen type should be dried at 200~250 ~C for 1 hour to prevent sticky oil and other dirt on the coating of the electrode, so as to avoid increasing the carbon content of the weld and affecting the quality of the stainless steel weld neck flange.

　　3. When stainless steel weld neck flange is welded, carbides are precipitated by repeated heating, which reduces the corrosion resistance and mechanical properties.

　　4. The hardening flange of chromium stainless steel weld neck flange is larger and easy to crack. If the same type of chromium stainless steel welding rod is used, it must be preheated above 300 ~C and slowly cooled after 700 ~C. If the weldment can not be heat treated after welding, stainless steel weld neck flange welding rod should be selected.

　　5. Stainless steel weld neck flange in order to improve its corrosion resistance and weldability, appropriate addition of stability elements Ti, Nb, Mo, etc., has better weldability than chromium stainless steel weld neck flange. When using the same type of chromium stainless steel weld neck flange welding rod, it should be preheated above 200 and tempered around 800 after welding. If the weldment can not be heat treated, stainless steel weld neck flange welding rod should be selected.

　　6. Stainless steel weld neck flange electrode has good corrosion resistance and oxidation resistance, which is widely used in chemical industry, fertilizer, petroleum, medical machinery manufacturing.

Why does stainless steel flange carry magnetism?

We often use magnets to adsorb stainless steel flange, to verify their merits and demerits, without magnetic absorption, which is considered good and genuine; if the sucker is magnetic, it is considered to be fake. In fact, this is a very one-sided, unrealistically wrong way of identifying. There are many kinds of stainless steel, which can be classified into several types according to their organizational structure at room temperature.

　　1. Austrian body: 304, 321, 316, 310, etc.

　　2. martensite or ferrite type: 430, 420, 410, etc.

　　The austenite type is nonmagnetic or weakly magnetic, and martensite or ferrite is magnetic.

　　Most Forging 304 Stainless Steel Socket Flanges used as decorative tubesheet is 304 austenitic material. Generally speaking, it is non-magnetic or weak magnetic. However, because of the fluctuation of chemical composition or different processing conditions caused by smelting, it may also appear magnetic. But this can not be considered as fake or unqualified. What is the reason?

　　As mentioned above, austenite is non-magnetic or weak magnetic, while martensite or ferrite is magnetic. Due to the segregation of composition or improper heat treatment during smelting, a small amount of martensite or ferrite in Austenitic 304 stainless steel flange will be formed. In this way, 304 stainless steel flange will have weak magnetism.

　　In addition, 304 stainless steel flange after cold processing, the structure will also be transformed to martensite, the greater the deformation degree of cold processing, the more martensite transformation, the greater the magnetism of steel. Like a batch of steel strips, produce Φ 76 tubes, without obvious magnetic induction, produce Φ 9.5 tubes. Because the cold bending deformation is larger, the magnetic induction is more obvious. Because the deformation of square rectangular pipe is larger than that of circular pipe, especially in the corner part, the deformation is more intense and the magnetism is more obvious.

　　If the stainless steel flange is weak or completely non-magnetic, it should be distinguished as 304 or 316 material; if it is the same as carbon steel, it shows strong magnetism, because it is not 304 material.

Heat treatment process of plate flange

After the three processes of heating, heat preservation and cooling, the performance of metal will vary. The same plate flange will have different performance after heating. For example, the performance of stainless steel plate flange is superior, which is obtained by heating and cooling the AISI 304 Stainless Steel Plate Flange. At the same time, the heating process of stainless steel plate flange is one of the important parameters in the heat treatment process.

　　In the process of plate flange heat treatment, annealing cooling speed is the slowest, normalizing cooling speed is faster and quenching cooling speed is faster. However, there are different requirements because of different kinds of steel. For example, air-hardened steel can be hardened at the same cooling rate as normalizing. These processes of plate flange are connected with each other and can not be interrupted.

　　When metal is heated, the plate flange is often oxidized when the workpiece is exposed to air. Decarbonization, which has a negative impact on the surface properties of parts after heat treatment. Plate flange metals should normally be controlled or protected in an atmosphere. Molten salt neutralization and vacuum heating can also be used by coating or packaging methods for protective heating.

　　In addition, the heating temperature of flange is one of the important technological parameters of heat treatment process. Selecting and controlling the heating temperature is the main problem to ensure the quality of heat treatment. The heating temperature varies with the treated metal materials and the heat treatment items, but generally it is heated to the phase transformation temperature above to obtain the high temperature structure. Heating is one of the important processes of heat treatment. There are many heating methods for plate flange metal heat treatment, the earliest one is to use charcoal and coal as heat sources, and then use liquid and gas fuels. Nowadays, many manufacturers use electric applications, which are easy to control and free of environmental pollution. These heat sources can be directly heated or indirectly heated by molten salts or metal or floating particles. At the same time, the performance of flanged pipes varies with different cooling methods, and the cooling speed is mainly controlled.

Analysis of the influence of cast steel shots quality on cleaning effect

Cast steel shots is the main consumable in the process of shot blasting cleaning. The wear of high-quality S230 Cast Steel Shots is a gradual process. The cast steel shots impacts the surface of the workpiece after acceleration by the shot blaster. Without a single impact, the cast steel shots produces a deformation and will fall off a layer of metal. The shape of the cast steel shots is similar to that of a football, and it is a polygon. The impact effect of one direction on the castings is equal. After many times of impact, the cast steel shots becomes smaller and smaller.

　　When it is small enough, it will be sucked away for the dust collector or separated by the pellet sand separator. The brain of shot peening machine when shot peening separator is used, which illustrates its importance in the whole set of shot peening equipment. In the process of shot peening machine, the performance of shot peening separator will directly affect the cleaning efficiency and cost. The work of pellet-sand separation is to separate the impurity sand which has been knocked off from the casting and the cast steel shots which have been ground very small or broken from the normal steel pellets, so as to ensure the cleaning efficiency and reduce the wear and tear of the pellet blasting machine. Cast steel shots is the main cause of equipment wear when shot blasting machine works. Statistics show that the life of vulnerable parts will be reduced by half for every 2% increase in sand.

　　The roughness of the cast surface after shot blasting cleaning is closely related to the strength and projection speed of the cast steel shot used. The larger the size of the cast steel shot, the higher the roughness of the workpiece surface, the faster the projection speed of the cast steel shot, the higher the roughness of the workpiece surface, and the surface obtained by mixing the cast steel shot with multiple sizes is better than that obtained .

Hardness of quenched cast steel grits for optimum use

Cast steel grits is also widely used in foundry industry. When the workpiece is removed from the mould, the cast steel grits on the workpiece surface is removed by cast steel grits. When cast steel grits is used with suitable equipment, because it is durable, it must be the best abrasive for surface cleaning. The manufacturing process of G40 Cast Steel Grits With ISO 9001 is to melt high quality steel blocks first, then use high-pressure water jet to make molten steel particles, the formed pellets are re-heated to purify uniformly, and then quenched. Because the surface color of tempered cast steel grits is uniform blue after annealing, tempered cast steel grits is often used as cast steel grits.

　　The service life of cast steel grits is only 50-400 times. The effect of rust removal of cast steel grits is seriously reduced and the interests of users are seriously damaged. It is right to fit steel forging cast steel grits reasonably according to the diameter and proportion of cast steel grits mill, but it is not necessary to install separately at large.The spherical shape and smaller hardness will not cause greater wear and tear to the equipment. Quenched pellets are dried and reheated in the furnace to achieve suitable hardness. The cast steel grits after tempering are divided into different grades through mechanical screen. Products with different particle size and hardness are used in different processes, such as surface strengthening.

　　Workpiece coating and sand blasting before bonding can remove all dirt such as rust on the surface of the workpiece, and establish a very important basic pattern on the surface of the workpiece. Moreover, by changing abrasives of different sizes, different degrees of roughness can be achieved, and the bonding force between the workpiece and coatings and plating materials can be greatly improved. Cast steel grits is used for steel plate pretreatment, usually used for rust removal before painting. There are many kinds of cast steel grits. Different kinds of cast steel grits require different raw materials and equipment. The production of cast steel grits, as well as related production lines and equipment, can be purchased directly. There are many places where cast steel grits are needed, such as castings, forgings, parts surface after machining, parts surface after heat treatment, etc.

　　They can be sold to these related places, such as general manufacturing, shipbuilding and so on. Generally heavy industry will have some demand. Advanced foundry technology and equipment: Adopting international advanced anhydrous production technology, even applying completely dry resin sand on metal film, completely eliminating casting defects such as pore and slag inclusion caused by water content in sodium silicate, making a qualitative leap in product quality, and improving iron-carbon ratio, fully adapting to quenching requirements.

Quality identification of industrial metal abrasive cut wire shot

Cut wire shot is one of the most ideal materials for industrial metal abrasives, so how to distinguish the quality of cut wire shot? High quality cut wire shot should meet the following characteristics:

　　1. 1.2mm Cut Wire Shot has moderate hardness, strong toughness, impact resistance and can be used repeatedly for several times.

　　2. Cut wire shot has long service life, good elasticity, strong adhesion, fast cleaning speed, low sand consumption, non-breaking, high brightness of cleaning workpiece, high efficiency on the surface of workpiece, rapid cleaning effect, good surface quality of treated workpiece, long-term use.

　　3. The cleanliness of metal surface treated with steel sand can reach international standards.

　　There are many kinds of specifications of cut wire shot, different specifications, for processing different parts, have a longer service life, play different roles. The quality of cut wire shot should be compared in terms of hardness, physical properties and specifications of the products, so that the products with good service life are better. When used, it can create more value.

Cast steel shots are widely used in deoxidizing and rusting treatment

Cast steel shots is widely used for deoxidizing and rust removal of iron and steel workpieces before painting. Centrifugal shot peening equipment is often used in this situation. The spherical shape and smaller hardness make the cast steel shots not cause greater wear and tear to the equipment. S110 Cast Steel Shots is also widely used in foundry industry. When the workpiece is removed from the mould, the sand on the workpiece surface is removed by cast steel shots.

　　Melt the high quality molten steel, then spray the molten steel with high pressure water spray gun to form cast steel shots. The formed cast steel shots are reheated to homogenize, and then quenched. Quenched cast steel shots are dried and reheated in the furnace to achieve proper hardness. The tempered cast steel shots are sifted into SEA-compliant grades through mechanical screen for shot blasting equipment. Products with different particle size and hardness are used in different processes, such as rust removal of steel, surface strengthening, etc. When adding new cast steel shots, please observe the principle of small amount of diligence.

　　The cast steel shots is made of scrap steel with selected raw materials, rare metals and optimum proportion alloys, melted in electric furnace, converted into steel grains by modern equipment, and after many times of electric heat treatment and automatic screening, its chemical composition and particle size are strictly controlled in the process of forming steel grains by liquid metals to ensure that its mechanical properties are in conformity with each other. For all purposes. Each production link has the most rigorous quality management. The cast steel shots produced are tightly organized, not easy to break, uniform particle size distribution, with appropriate hardness, strong impact resistance and long service life.

　　According to the working requirements of automobile factory, the steel plate and some casting parts need polishing treatment, but the strength of the steel plate and the original shape can not be damaged. The appearance of the casting must be clean and beautiful. Because automotive parts are not very regular, it requires different polishing machines to complete. Need to use shot blasting machine: drum type, rotary table type, crawler type, through type shot blasting cleaning machinery, different machinery to deal with different parts.

Principles for choosing cast steel grits

Generally speaking, casting and steel structure are generally more than 1.0 when the requirement of Cast Steel Grits From Reaguan is not very strict. Thin-walled parts such as shipbuilding and car-building are generally less than 1.0. Judging the surface requirement of shot-blasted products is the most important. Some foundry enterprises export or require special ones to be selected below 1.0, but also to It depends on the size of the workpiece and the hardness of the surface.

　　Specific models should be determined by comprehensive consideration of data. Metal abrasive is a kind of metal abrasive. The types and numbers of cast steel grits are too many. What industry uses depends on the specific conditions. Sometimes customers who need cast steel grits may use alloy steel grit, and some may use cast steel grits. It is hard to say what they use mainly depends on the requirements of customers for sprayed objects. Generally speaking, copper and aluminium parts. For example, cast steel grits with very strict surface are required, but the products on the market are mixed and of all quality and price.

　　As far as cast steel grits is concerned, I haven't seen it used alone. It's all mixed. Steel structure, shipbuilding, car building, etc. Cast steel grits and steel grits are widely used. They can be used alone or mixed with other products.

Why the price of stainless steel cut wire shot will be relatively high?

　In the prices of stainless steel cut wire shot continued to decline today,the price of stainless steel cut wire shot is rising in steel grit, stainless steel shot obviously body is rather special, its price is high, is also a reason, after all he is fine in quality. The processing technology of stainless steel cut wire shot and steel wire cutting process of Stainless Steel 304 Cut Wire Shot is basically the same, but the ability of texture pill Relatively hard, cutting machine requirements are very high, and the tool wear is very fast, very large amount of cutting tool, cutting tool of stainless steel cut wire shot is very expensive, the cost is increased, the natural price is rising.

　　The second reason is the low yield, because the tool wear stainless steel cut wire shot quickly, often change, led directly to stainless steel and low yield, which is one of the reasons why the high price of stainless steel cut wire shot.

　　There is an important reason. Although steel prices decline, but non-ferrous metal stainless steel prices did not drop a lot, that is to say, the price of raw materials of stainless steel cut wire shot is still very high, which is caused by another important factor for the high price of stainless steel cut wire shot.

Application of cast steel shots in architecture

Cast steel shot is a new type of wear-resistant material in recent decades.Cast steel shots is basically refined from iron and steel by natural iron ore, and its main component is iron oxide red.

　　The cast steel shots has obvious characteristics, high grade, uniform particle size, high hardness, non-powdering specific gravity, and red or black color. Not only wear resistance, compression resistance, impact resistance, but also moisture resistance, acid and alkali corrosion resistance, high temperature resistance and other properties, are widely used in construction. The wear-resisting layer made of cast steel shots concrete or iron-steel mortar is superior to the wear-resisting layer made of cast steel shots mortar in compressive strength, splitting tensile strength and friction coefficient.

　　Cast steel shots are easy to decay and fall off, but cast steel shot is not. Compared with diabase cast stone, cast steel shot is not only cheap, but also easy to construct. Cast Steel Shot Used For Shotblast Machine impact strength and brittleness are about twice as high as diabase cast stone. Therefore, iron and cast steel shot has been widely used as concrete or mortar wear-resisting layer in coal mine, electric power, chemical metallurgy, warehouse,cast steel shots loading and unloading machinery factory, parking plant, electronic industry, highway, textile industry, military industry and other industrial infrastructure projects for decades, which is used in sites with heavy friction, easy damage and high impact force.

　　Scope of application of cast steel shots in construction:

　　In the construction of coal chemical industry infrastructure, wear-resistant layers on the inner walls of various coal bunkers, funnels and chutes, and wear-resistant layers on the surface of coal pillars and beams, etc.

　　In the construction of thermal power plant, the wear-resisting layer of coal conveying system such as bunker, funnel and unloading ditch, and the wear-resisting layer of inner wall such as dry ash depot are used.

　　Coal coking and iron and steel infrastructure construction: ore trough, coal pit, coke trough, funnel and other wear-resistant layer;

　　In infrastructure construction of cement industry, wear-resistant coatings such as funnels, silos, pits, bulk storehouses, etc.

　　In the infrastructure construction of water resources and hydropower, the anti-erosion and anti-wear coatings such as spillway tunnel, diversion tunnel, overflow dam surface and ship lock are used.

　　Grass-roots and civil buildings: staircase pedals and anti-skid strips; wear-resistant ground of underground garage and parking lot;

　　In metallurgical and chemical infrastructure construction, wear-resistant layers such as hoppers, silos and chutes in various mineral processing and chemical industries;

　　Other infrastructures: such as heavy truck stacking and large machine tool workshop, heavy pressure workshop of machinery and equipment, oil spill-prone, oil-proof, skid-proof and wear-resistant places, which need dust-proof in high-tech processing and production.

What are precautions encountered during the opening of stainless steel tee link

The extrusion-expansion deformation of ANSI B16.9 Stainless Steel Pipe Fitting 2'' Equal Tee belongs to elongation deformation. When the E is large enough, the material will shrink at the edge of the hole and then crack. Therefore, preventing the hole edge cracking is the main problem of extrusion bulging, and the ultimate deformation degree of one-time bulging is mainly limited by the elongation of stainless steel tee.

　　The matters needing attention in the process of stainless steel tee opening are as follows:

　　1. Stainless steel tee in the blockade position, the ball by the mechanical pressure of the stem immersion, pressure on the seat.

　　2. When the hand wheel is moved counterclockwise, the stem of the stainless steel tee valve acts in the opposite direction, and its bottom angular plane causes the ball to detach from the seat.

　　3. The stem is continuously drawn and impregnated with the guide pin in the spiral groove of the stem, so that the ball can be twisted without friction at the beginning.

　　4. until the full opening position, the stem is drawn to the limit position and the sphere is turned to the full open position.

Stainless steel elbow can be changed by two ways

Road buried underground can occupy less land, which is conducive to combat readiness. It is basically not affected by external factors such as climate and season. More importantly, it can reduce heat loss in hot oil transportation and prevent thermal deformation of Butt Welded 90 Degree Pipe Fitting 316 Stainless Steel Elbow in pipelines and pipelines.

　　In order to reduce heat loss and prevent hot deformation of stainless steel elbow, the buried depth of pipe should be more than 1.2 meters.The depth of burial depth in the alpine region should be further deepened. At the same time, the pipeline should be avoided as far as possible below the water table. For areas with high groundwater level or difficult to dig deeply for other reasons, waterproof and heat insulation measures should be taken before burying pipes. If conditions are not available, shallow digging and deep burying can also be adopted, i.e. piping ditches are digged up to 20 cm above the groundwater level, and then covered with soil to form embankments.

　　However, it will be difficult to maintain the pipeline and stainless steel elbow after commissioning. In order to prevent the deformation of pipeline and stainless steel elbow, and to ensure the weight of overlying soil, the thickness of overlying soil in shallow and deep buried areas should not be less than 1.5 meters.

　　Drawing and analyzing the hydraulic gradient line is helpful to study the working process and characteristics of the oil pipeline and stainless steel pipe fittings elbow under various working conditions in the future.

　　We use the steady-state pressure distribution chart to study the working condition of the pumping station in detail. When the pumping station works according to the "through tank" process, the pressure diagram of each section has nothing to do with the working condition of the adjacent stainless steel pipe fittings elbow. The pressure of the initial section is determined by the work of the pump station, and the pressure of the end point is only determined by the liquid level in the tank.

Stainless steel reducers under internal pressure

The bending moment caused by the area pressure difference between the big and small ends of the stainless steel reducer under internal pressure causes the relative opening of the large end and the relative contraction of the small end. Under internal pressure, the circumferential stresses on the inner surface of the A403 Bw Seamless Ss 321 Pipe Concentric Stainless Steel Reducer, the large end of the eccentric side and the middle and outer surface of the eccentric side are the largest. The above theoretical results are verified by finite element numerical analysis and experimental verification. The experimental results also show that the bending radius and the cross-section radius of the annular shell increase with little change in the wall thickness under internal pressure.

　　Diameter expanding of stainless steel reducer is formed by using a blank smaller than the diameter of large end of stainless steel reducer, and by using an internal punching die to expand the diameter along the inner diameter of the tube blank. The expanding process mainly solves the problem that it is not easy for the large diameter pipe to be formed by reducing. Sometimes, according to the need of material and product forming, the methods of expanding and reducing are combined.

　　The circumferential stress formula and meridional stress formula of concentric reducer are derived under internal pressure. Under the corresponding structural parameters, the formula of circumferential stress of different-diameter elbow can be transformed into the formula of circumferential stress of concentric, eccentric or stainless steel reducer. On this basis, the limit pressure formula of the reducer is derived. The whole process is formed by the radial compression of the billet and the drawing process of the branch.

　　The hot-pressing forming of stainless steel reducer is to flatten the billet larger than the diameter of the tee to the size of the diameter of the tee and open a hole in the part of the drawing stainless steel reducer; the billet is heated and put into the forming die, and the blank is loaded into the punching die of the drawing stainless steel reducer; under the action of pressure, the billet is radially compressed and the metal direction is in the process of radial compression. The different diameter pipe flows in a direction and forms a branch pipe under the stretching of the die.

Will stainless steel cross rust?

The stainless steel cross is used in the place where the four pipes converge. The main stainless steel materials are 304, 304L, 316 |, 316L. Stainless steel cross has the characteristics of easy installation, high performance and durability. It is widely used in various pipeline construction and installation. Iron and steel are distinguished from the amount of carbon. Iron carbon alloy with carbon content below 2% is steel, and carbon content of more than 2% is called iron. Steel is widely used because of its toughness, elasticity and rigidity. Life is touched by steel, but people call it different. For 150lb Pipe Fitting Female Threaded 4-Way Stainless Steel Cross, whether magnets can be absorbed or not, as long as they meet the quality standards, they are stainless steel.

　　Stainless steel has the ability to resist atmospheric oxidation,stainless steel cross but also has the ability to corrode in medium containing acid, alkali and salt, that is, corrosion resistance. However, the corrosion resistance of the steel varies with its chemical composition, additive state, service conditions and the type of environmental medium. For example, stainless steel cross has absolutely excellent corrosion resistance in dry and clean atmosphere, but when it is moved to the coastal area, it will rust quickly in the sea fog containing a lot of salt, while 316 steel pipe performs well. Therefore, not any stainless steel cross can be corroded and rust free under any environment.

　　Stainless steel is a very thin, solid and stable chromium-rich oxide film formed on its surface, which prevents oxygen atoms from penetrating into and oxidizing continuously, and obtains the ability to resist corrosion. Once for some reason, the film is constantly destroyed, oxygen atoms in air or liquid will continuously infiltrate or iron atoms in metal will continuously separate out, forming loose iron oxide, and metal surface will be constantly corroded.

Why does stainless steel flange carry magnetism?

We often use magnets to adsorb stainless steel flange, to verify their merits and demerits, without magnetic absorption, which is considered good and genuine; if the sucker is magnetic, it is considered to be fake. In fact, this is a very one-sided, unrealistically wrong way of identifying. There are many kinds of stainless steel, which can be classified into several types according to their organizational structure at room temperature.

　　1. Austrian body: 304, 321, 316, 310, etc.

　　2. martensite or ferrite type: 430, 420, 410, etc.

　　The austenite type is nonmagnetic or weakly magnetic, and martensite or ferrite is magnetic.

　　Most Forging 304 Stainless Steel Socket Flanges used as decorative tubesheet is 304 austenitic material. Generally speaking, it is non-magnetic or weak magnetic. However, because of the fluctuation of chemical composition or different processing conditions caused by smelting, it may also appear magnetic. But this can not be considered as fake or unqualified. What is the reason?

　　As mentioned above, austenite is non-magnetic or weak magnetic, while martensite or ferrite is magnetic. Due to the segregation of composition or improper heat treatment during smelting, a small amount of martensite or ferrite in Austenitic 304 stainless steel flange will be formed. In this way, 304 stainless steel flange will have weak magnetism.

　　In addition, 304 stainless steel flange after cold processing, the structure will also be transformed to martensite, the greater the deformation degree of cold processing, the more martensite transformation, the greater the magnetism of steel. Like a batch of steel strips, produce Φ 76 tubes, without obvious magnetic induction, produce Φ 9.5 tubes. Because the cold bending deformation is larger, the magnetic induction is more obvious. Because the deformation of square rectangular pipe is larger than that of circular pipe, especially in the corner part, the deformation is more intense and the magnetism is more obvious.

　　If the stainless steel flange is weak or completely non-magnetic, it should be distinguished as 304 or 316 material; if it is the same as carbon steel, it shows strong magnetism, because it is not 304 material.

Important position of stainless steel cap

The opposite radial displacement occurs at the connecting part, which strengthens and counteracts most of the radial displacement, so that the circumferential compressive stress of the cylinder reduces the circumferential tensile stress of the stainless steel caps.

　　When the elliptical stainless steel caps and the cylinder are connected, the bending radius of the elliptical stainless steel caps is continuous and does not produce stress, so it can be used in the container of higher pressure, while the disc. The connection of shaped ASTM A312 TP304L stainless steel pipe fittings cap is discontinuous and the productivity stress is generally applied in low pressure vessel, especially for stamping and butterfly stainless steel caps.

　　The structural discontinuity zone of pressure vessel is usually the high stress zone of pressure vessel. Generally speaking, the structural discontinuity zone of pressure vessel can be divided into two types: the general structural discontinuity zone and the local structural discontinuity zone.

　　Overall structural discontinuity refers to the stress or strain sources that affect a considerable part of the structure, such as the joint area between stainless steel caps and shell, flange and shell, nozzle area, joint area of different diameters or thicknesses or materials, etc. Local structural discontinuity refers to the stress that affects a relatively small area of the structure. Or strain sources, such as small fillet radius, small connectors, partially penetrated welds or holes, etc. Many structures, such as pressure vessel nozzles with openings, have both overall structural discontinuity and local structural discontinuity. Because the geometric structure of discontinuous zone is usually complex, it is difficult to solve it accurately by analytic method, and the finite element method is usually used to calculate it.

What are the matters needing attention during the opening of stainless steel tee

The extrusion-expansion deformation of stainless steel tee belongs to elongation deformation. When the E is large enough, the material will shrink at the edge of the hole and then crack. Therefore, preventing the hole edge cracking is the main problem of extrusion bulging, and the ultimate deformation degree of one-time bulging is mainly limited by the elongation of Stainless Steel Equal Butt Welded Pipe Fitting Tee.

　　The precautions in the process of opening stainless steel tee are as follows:

　　1. Stainless steel tee in the blockade position, the ball by the mechanical pressure of the stem immersion, pressure on the seat.

　　2. When the hand wheel is moved counterclockwise, the stem of the stainless steel tee acts in the opposite direction, and its bottom angular plane causes the ball to detach from the seat.

　　3. The stem is continuously drawn and impregnated with the guide pin in the spiral groove of the stem, so that the ball can be twisted without friction at the beginning.

　　4. Up to the full open position, the stem is drawn to the limit position and the sphere is twisted to the full open position.

Bending resistance of stainless steel elbows

Stainless steel elbow processing relies on the power of conventional or special stamping device, so that the sheet metal can directly bear the deformation force and deformation in the die, thus obtaining the production skills of commodity parts with certain shape, size and function. Sheet metal, die and its device are the three elements of stamping. Because the stainless steel elbow has the advantages of inner wall lubrication, low resistance to heat medium activity, acid and alkali resistance, long service life, convenient installation and so on.

　　The 316L sch10s long radius 90 Degree 1.5d Seamless Stainless Steel Elbow has an inner lining at the pipe orifice. One part of the inner lining is located in the pipe orifice, which is fixed to the wide inner wall. The other part of the inner lining is located outside the pipe orifice. The inner lining of the product located outside the pipe orifice is provided with a cut. When the stainless steel elbow is connected with the stainless steel pipe, it is easy to butt and install. It can eliminate the tension produced by the pipe connection and has strong deformation resistance. After welding, the joint will not be deformed after a long time of use, and the installation decoration effect is good.

　　Stainless steel elbow, involving the field of architectural decoration, its technical points are includes a curved bending section and a straight section connected at both ends of the bending section, and also includes an arc bending section. The two ends of the product bending section are connected through the bending section, and the two parts form a hollow. Through the setting of bending parts, the bending resistance of stainless steel elbows is enhanced, and the service life of stainless steel elbows is also increased.

On material anti-corrosion function of stainless steel reducers

We have sorted out the relevant information on the topic of material anti-corrosion function introduction of stainless steel reducers. We have rich production experience for many years. We have our own unique views on the topic of material anti-corrosion function introduction of ISO Socket Weld Pipe Fittings Concentric Stainless steel Reducers. The following is our own views on this topic, hoping to help you.

　　The preparation method of eccentric Stainless steel reducers is to use a plurality of grading dies to directly reduce the eccentric diameter on the metal pipe, first to leave the main pipe section in the middle of the whole metal pipe, and then to press the eccentric stainless steel reducers step by step using a plurality of grading dies according to the requirement of the diameter changing angle. The eccentric stainless steel reducers processed by the method of the present invention has no eccentric stainless steel reducers on the whole eccentric stainless steel reducers. Weld seam; eccentric stainless steel reducers as a special pipe, used in corrosive liquids, can extend the service life of eccentric stainless steel reducers, especially as the shell of downhole eccentric water distributor, because there is no weld, it will not corrode and crack at the weld; flexible production process, can process eccentric stainless steel reducers with arbitrary length of eccentric straight section.

　　The middle of eccentric stainless steel reducers is the main section, and the ends are the eccentric straight section. There is an eccentric shrinkage transition section between the main section and the eccentric straight section. The bottom line of the eccentric stainless steel reducers keeps the same straight line.

　　When will the diffuser be used?

　　1. When the flow rate of the fluid in the pipeline changes, such as increasing or decreasing, and the flow rate requirement does not change much, the stainless steel reducers should be used.

　　2. In order to prevent cavitation at the inlet of the pump, it is necessary to use stainless steel reducers.

　　3. In order to cooperate with instruments such as flowmeters and control valves, stainless steel reducers are also needed.