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Convex plate-type downhand ste

Convex plate-type downhand ste

Flange connection means fixing two pipes, pipe fittings or equipment on a ring flange, adding a flange pad between two ring flanges, and fastening them together by using bolts, hence completion of the connection. Some fittings and equipment have been provided with ring flanges, also subject to flange connection. Flange connection is an important connection method during pipe construction.
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Description

Convex plate-type downhand steInformation

Convex plate–type downhand steel pipe flanges

The sealing face of plate-type common welded flange
Flat face (FF), raised face (RF)
Production materials
Carbon Steel: ASTM A105,20#, Q235, 16Mn, ASTM A350 LF1, LF2 CL1/CL2, LF3 CL1/CL2, ASTM A694 F42, F46, F48, F50, F52, F56, F60, F65, F70；
Stainless steel: ASTM A182 F304, 304L, F316, 316L, 1Cr18Ni9Ti, 0Cr18Ni9Ti, 321, 18-8;
Alloy steel: ASTM A182 F1, F5a, F9, F11, F12, F22, F91, A182F12, A182F11, 16MnR, Cr5Mo, 12Cr1MoV, 15CrMo, 12Cr2Mo1, A335P22, St45.8/Ⅲ;
Applicable flange standards
HG20593-1997 of the Ministry of Chemical Industry, the Chinese standard GB/T9119-2000

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