Flange cover/flanges (BL):
Flange cover, also known as flange, blind flange is a middle flange with no hole, for sealed pipe plug. Sealing surface in the form of a sort is more, there are flat, convex, concave and convex surface, grooved surface, RTJ.
Sealing surface: surface (FF), DCS (RF), concave and convex surface (MFM), grooved surface (TG), RTJ (RJ)
American standard: ANSI B16.5 Class150, 300, 600, 900, 600 (WN, SO, BL, TH, LJ, SW)
Japanese standard :JIS 5 k, 10 k, 16 k, 20 k (PL, SO, BL, WN, TH, SW)
Mark: DIN2573, 2572, 2631, 2576, 2632, 2633, 2543, 2634, 2545 (PL, SO, WN, BL, TH)
Chemical standards: HG5010-52 ~ HG5028-58, ~ HGJ65 HGJ44-91-91, (PN series) \ HG20615 HG20592-2009-2009 (Calss series)
Mechanical standard: JB81-59 ~ JB86 59, JB/T79-94 and JB/T86-94, JB/T74-1994
Pressure vessel standard: ~ JB1160 JB1157-82-82, JB4700-2000 ~ JB4707-2000
Application: apply to the boiler pressure vessel, petroleum, chemical, shipbuilding, pharmaceutical, metallurgy, machinery, food and other industries
Stainess Steel: ASTM A182 F304, 304 l, F316, 316 l, 1 cr18ni9ti, 0 cr18ni9ti, 321, 18-8;
Carbon Steel: ASTM A105, Q235, 16 mn, ASTM A350 LF1, LF2 CL1 / CL2, LF3 CL1 / CL2, ASTM A694 F42, F46, F48, F50, F52, F56, the F60, F65, F70;
Alloy Steel : ASTM, F5a A182 F1, F9, F11, F12, making, F91 and A182F12, A182F11, 16 MNR, Cr5Mo, 12 cr1mov, 15 crmo, 12 cr2mo1, A335P22, St45.8 / Ⅲ.
