ANSI B16.5 Class 150/300/600/900 Carbon/Stainless Steel Weld Neck Forged Flanges

ANSI B16.5 Class 150/300/600/900 Carbon/Stainless Steel Weld Neck Forged Flanges

A circular groove is opened in the middle of the two flanges, the metal ring is placed in, the two flanges are hit hard, and the flange is hard connected.