What is weld neck flange?

Weld neck flanges(WN flange) attach to the pipe by welding the pipe to the neck of the pipe flange.The allows for the transfer of stress from the weld neck pipe flanges to the pipe itself.This also reduces high stress concentration at the base of the hub of the weld neck pipe flanges.Weld neck pipe flanges are often used for high pressure applications.The inside diameter of a weld neck pipe flange is machined to match the inside diameter of the pipe. 

carbon-pipe-weld-neck-flange

We produce weld neck flange according to ANSI/ASME B16.5,ANSI/ASME B16.47,BS4504,BS3293,EN1092,DIN2631,DIN2632,DIN2633,DIN2634,DIN2635,DIN2636,DIN2637,DIN2638,JIS B2220,SABS/SANS 1123,GOST/ГОСТ 12821-80,MSS SP-44,API 6A,6B,6BX,JSO 7005,NFE29203,KS B1503,UNI 2280-67,UNI 2281-67,UNI 2282-67,UNI 2283-67,UNI 2284-67,HG20595,AS2129 standard.

long-weld-neck-flange

Data Of Weld neck flange:

Size: 1/2”-160” DN15-DN4000mm

Pressure: Class 75,Class 125,Class 150,Class 300,Class 400,Class 600,Class 900,Class 1500,Class 2500.

3000 PSI,5000 PSI,10000 PSI,20000 PSI.

PN2.5,PN6,PN10,PN16,PN25,PN40,PN64,PN100,PN160.

5K,10K,15K,20K,30K.

We have a complete set of equipments including advanced cutting,forging,machining,drilling machines and professional testing & inspection instruments.Welcome to contact us when you have any need about all kinds of weld neck flange.