Difference between ASME B16.5 flanges and ASME B16.47 flanges

ASME B16.5 and ASME B16.47 are two widely used flange standards in the piping industry. These standards define the dimensions, materials, types, and pressure ratings of flanges used for various applications. In this article, we will introduce ASME B16.5 and ASME B16.47 flange sizes, types, and pressure ratings to help you choose the right flange for your project.

ASTM A182 Gr.F304 304L ASME B16.5 RF blind flange

ASME B16.5 Flanges:

ASME B16.5 is the most common flange standard used in the United States. It covers flanges from 1/2″ to 24″ in size, with pressure ratings ranging from 150 to 2500 psi. ASME B16.5 flanges come in various types, including weld neck, slip-on, threaded, socket weld, blind, and lap joint. The weld neck flange is the most commonly used type and is suitable for high-pressure and high-temperature applications. The slip-on flange is suitable for low-pressure applications, while the threaded flange is suitable for low-pressure and non-critical applications. The socket weld flange is suitable for small-diameter high-pressure pipelines. The blind flange is used to close off the end of a pipe, while the lap joint flange is used when the piping system requires frequent dismantling.This standard includes flanges with raised face (RF), flat face (FF), and ring joint (RTJ) types. It also covers flanges in materials such as carbon steel, stainless steel, and alloy steel.

Weld Neck Flange RF A105 ASME B16.47A

ASME B16.47 Flanges:

ASME B16.47 is another flange standard used in the United States. It covers flanges from 26″ to 60″ in size, with pressure ratings ranging from 75 to 900 psi. ASME B16.47 flanges come in two series: Series A and Series B. Series A flanges are equivalent to the ASME B16.5 standard and have the same size and pressure rating range. Series B flanges are larger and have a lower pressure rating than Series A flanges. ASME B16.47 flanges come in weld neck and blind types. The weld neck flange is commonly used in high-pressure and high-temperature applications, while the blind flange is used to close off the end of a pipe.ASME B16.47 flanges are typically used in applications such as oil and gas pipelines and chemical processing plants.

ASME B16.5 and ASME B16.47 are two widely used flange standards that cover a wide range of sizes, pressure ratings, and types. Haihao Group can provide you with high-quality flanges in accordance with these standards. With our extensive experience and professional team, we can help you choose the right flange for your project and ensure timely delivery.