The structural form of the flange

Integral flange

Unit flange

a, threaded flange

b, welding flange, butt welding flange

Flat neck welded flange with neck socket welded flange plate flat welded flange

c. Loose flanges Welded ring loose sleeves with neck flanges Welded rings loose sleeve flanges Flat weld rings loose sleeve flanges Plated over loose flanges

d, flange cover (blind hole flange)

e, rotating flange

f, anchor flange

g, surfacing / overwelding flange