Weld neck flange provides a long tapered hub for welding to pipes , it is used in high pressure systems and suitable for both cold and hot temperatures. Generally machined by forging method, these flanges are typically butt welded to the pipe,when you are going to buy weld neck flange, it is important to specify the pipe thickness schedule. Because the flange inside diameter will match the inside diameter of pipe. The rim has a series of drilled holes that permit the flange to be affixed to another flange with bolts.

Forged Steel Flange Standard

• ASME B16.5
• ASME B16.47A
• ASME B16.47B
• JIS B2220
• KS B1503
• DIN 2573
• DIN 2527
• DIN 2631
• BS 4504
• API 6A