Neck welding flanges are used for butt welding of flanges and pipes. They have a reasonable structure, high strength and stiffness, can withstand high temperature, high pressure, repeated bending and temperature fluctuations, and have reliable sealing performance. Neck welding flanges with a nominal pressure of 0.25-2.5MPa use concave convex sealing surfaces.

Advantages:

1. Connect the pipeline and maintain its sealing performance

2. Facilitating the replacement of a certain section of pipeline

3. Easy to disassemble and inspect the condition of the pipeline

4. Facilitating the closure of a certain section of pipeline

Welding flange parameters:

Sealing surface types: flat (FF), protruding surface (RF), concave convex surface (MFM), mortise and tenon surface (TG), ring connecting surface (RTJ)

Material:

Stainless Steel: ASTM A182 F304, 304L, F316, 316L, 1Cr18Ni9Ti, 0Cr18Ni9Ti, 321, 18-8, 309S, 310S, 316Ti, 317, 347, etc

Alloy Steel: ASTM A182 F51, F57, 2520, 2205, 904L, S32304, S31500, S31803, S32205, S32750, etc

Manufacturing standards: ANSI B16.5, HG20617-1997, GB/T9115.1-2000- GB/T9115.4-200

Also 2630 - 2638 、 Hg 20595 - 1997 、 GB / T 9115.1 - 2000 、 GB / T 9115.4 - 2000