Flanges are also known as blind flanges and blind plates. It is a flange with no hole in the middle for sealing the pipe plug.
The production materials of flange cover are introduced in detail.
1, carbon steel (Carbon Steel): ASTM A105,20#, Q235, 16Mn, ASTM A350 LF1, LF2 CL1/CL2, LF1, 16Mn, and Q235,
2, stainless steel (Stainess Steel): ASTM A182 F304, 304L, F316, 316L, 1Cr18Ni9Ti, 0Cr18Ni9Ti, 321, 18-8;
3, alloy steel (Alloy Steel): ASTM, A182, F1, F5a, F9, F11, F12, F22, F91, F91, F11, x, C, P, C, C, t, C, III.