Weld Neck Flange
API 6A Weld Neck Flanges are pipe flanges attach by welding the pipes to the neck of the flanges. This transfers stress from the flange to the pipe instead. It also reduces the stress concentration from the base of the hub. Welding neck flanges remove stress concentration and allow full working pressure and they are often used for high pressure applications. The inside diameter of the flange is designed to match the pipe’s inside diameter. Weld neck pipe flanges are typically provided with a raised face, flat face, or RTJ facing.
Size: 1-13/16″ – 26-3/4″
Working Pressure: 2000PSI, 3000PSI, 5000PSI, 10000PSI, 15000PSI, 20000 PSI
Material: AISI 4130(forged)/ SUS316/Inconel 625
Face: FF, RF, RTJ
Connection: bolted or studded
Temp Class: L-U
Material Class: BB, CC, DD, EE, FF
Product Specification Level: PSL1, PSL2, PSL3, PSL4
Performance Requirement: PR1, PR2
Standards: API 6A, NACE MR0175, ISO 9001, ISO14001, ANSI
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