Stainless steel welded flange

Stainless steel butt welding flanges are made of stainless steel material, commonly used stainless steels include 304, 304, 304, 316, 316L, etc. Welding flanges are also called neck welding flanges. The code WN refers to a flange with a neck and a circular pipe transition, which is welded to the pipe. Welding flanges are not easily deformed, have good sealing, are widely used, have corresponding requirements for rigidity and elasticity, and reasonable welding thinning transition. The distance between the weld and the joint surface is large, and the joint surface is protected from welding temperature deformation. The sealing surface of butt welded flanges is generally convex (RF), concave convex (concave FM convex M), and mortise and tenon groove are not commonly used. Docking welding flanges are suitable for pipelines with significant pressure or temperature fluctuations, as well as pipelines with high, high, and low temperatures. They are also used for pipelines transporting petroleum, chemicals, flammable, and explosive media. The welding method used for connecting flanges and pipelines through butt welding is butt welding, and the weld seam is similar to the welding between pipelines. Generally, for small pipe diameters, argon arc welding is used as the base and manual welding is used for the cover, while for large pipe diameters, double-sided welding is used

Stainless steel butt welding flange processing materials: (304, 304L, 316, 316L, S30408, S30403, S31608, S31603, SUS304, ASTM A403, TP321, TP317L, 347, 0Cr18Ni9, 00Cr19Ni10, 00Cr17Ni14Mo2, 1Cr18Ni9Ti, 06Cr17Ni12Mo2, 022Cr17Ni12Mo2, etc.)

Common types and codes of flanges: 1. PL plate flat welding flange, 2. SO neck flat welding flange, 3. WN neck flat welding flange, 4. SW socket welding flange, 5. Th threaded flange, 6. BL flange cover, 7. Eight character blind plate, 8. PJ/SE neck welding ring loose flange, 9. PJ/PR flat welding ring loose flange, 10. reducing flange, 11. stainless steel flange, 12. pressure vessel flange, 13. American standard flat welding flange, 14. American standard SO neck flat welding flange, 15. American standard WN neck welding flange, 16. Common sealing surface forms of flanges

Code: RF protruding surface, FM concave surface, M convex surface, T tenon surface, G groove surface, FF full plane, RJ ring connection surface. Common execution standards for stainless steel butt welding flanges: The current flange standards in China are divided into two systems, namely the PN series (European system) And the Class series (American system). The pressure markings specified in this standard are divided into PN markings and Class markings. The PN label has 12 pressure levels, namely: PN2.5; PN6; PN10; PN16; PN25; PN40; PN63; PN100; PN160; PN250; PN320; PN400。 The Class label has 6 pressure levels, namely: Class 150; Class 300; Class 600; Class 900; Class1500; Class 2500。 The implementation standards include GB series (standard), JB series (mechanical department), HG series (chemical department), ASME B16.5 (American standard), BS4504 (British standard), DIN (German standard), JIS (Japanese standard)

Standards: GB/T9112-2010, GB/T9119-2010, GB/T9116-2010, GB/T9115-2010

Ministry of Chemical Industry Standards: HG/T20592-2009, HG/T20615-2009, HG5010-52~HG5028-58, HGJ44-91~HGJ65-91, HG20592-97

American Standards: ASME B16.5, ASME B16.47