ANSI / ASME B16.47 Stainless Steel Series A Blind Flanges are available in a wide range of sizes and pressure ratings to meet the needs of large pipeline systems. The size range typically extends from NPS 26 to NPS 60 (DN 650 to DN 1500) or larger, with the specific size determined by the flange's outer diameter (D).
In ASME B16.47, blind flanges are classified into Series A and Series B based on pressure ratings. Series A includes five pressure classes: 150, 300, 400, 600, and 900. These pressure classes represent the maximum working pressure that the flange can withstand.
Blind flanges can be manufactured from various materials, including carbon steel, stainless steel, and alloy steel, depending on the application environment, medium requirements, and design conditions. Stainless steel, particularly ASTM A182 F304, is a popular choice due to its excellent corrosion resistance and mechanical properties.ASTM A182 F304 stainless steel is a low-carbon austenitic stainless steel containing approximately 18% chromium and 8% nickel, providing good stability in various corrosive media. Blind flanges made of ASTM A182 F304 stainless steel offer reliable sealing and strength under various operating conditions.
Blind flanges feature various sealing surface types, such as raised face (RF), flat face (FF), and male and female (MFM), to cater to different sealing requirements. The reliable sealing effect of blind flanges is achieved through bolt connections and gasket compression.Compared to welded heads or caps, blind flanges offer the advantage of removability, facilitating easy pipeline maintenance, expansion, or cleaning when needed. The bolt and nut connections of blind flanges allow for convenient disassembly and reassembly.
ANSI / ASME B16.47 Stainless Steel Series A Blind Flanges are widely used in petrochemicals, natural gas, power engineering, and the chemical industry to close off large pipeline systems or isolate specific sections of pipelines. Their removability makes it easier to perform maintenance, expansion, or cleaning on pipelines as needed.
ANSI / ASME B16.47 Stainless Steel Series A Blind Flanges play a crucial role in large pipeline systems, offering a range of sizes, pressure ratings, and materials to suit various applications. Their excellent sealing performance, removability, and wide application range make them an ideal choice for industries requiring reliable and durable pipeline connections.
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