Welding neck Flange

Weld neck flanges are the most popular flange type with a neck extension with a weld bevel at the end.This type of flange is designed to butt weld directly to pipe to provide a superior and relatively natural for connection. In larger sizes and higher pressure classes, this is almost exclusively the type of flange connection utilized. If only one bored flange style existed in modern applications, the weld neck would be your flange of choice.Weld neck flange (WN flange) has a neck that can relocated stress of the pipe, so to reduce the pressure that gathered in the flange bottom. It is compatible to the pipelines that works in high or low temperature and bear high pressure.

WN Flange Standards

ASME,ANSI B16.5 / ASME,ANSI B16.47

JIS B 2220-2004 WN

EN1092-1 Type11

GOST33259-2015(GOST12821-80)

DIN 2630 PN 1 and PN 2.5, 2631 PN 6, 2632 PN 10, 2634 PN 16, 2634 PN 25, 2635 PN 40

Material Standards

For carbon steel weld neck flange

ASTM A105/N, S235JR / ST37.2 / Q235, P245GH , C22.8 / P250GH , 20# , 16Mn , 20Mn ,CT20 steel

WN Flange Face Type

Like other flanges it has Raised Face (RF) Type and Ring Type Joint (RTJ).

              Raised Face Weld Neck Flange                       RTJ Weld Neck Flange

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