Standard Flange Cover

National Standard: GB/T9112-2000 (GB9113·1-2000 to GB9123·4-2000)

U.S. Standard: ANSI B16.5 Class 150, 300, 600, 900, 1500 (WN, SO, BL, TH, LJ, SW) Japanese Standard: JIS 5K, 10K, 16K, 20K (PL, SO, BL, WN, TH, SW)

German Standard: DIN 2573, 2572, 2631, 2576, 2632, 2633, 2543, 2634, 2545 (PL, SO, WN, BL, TH)

Chemical Industry Department Standards: HG5010-52 to HG5028-58, HGJ44-91 to HGJ65-91; Flange Standards: HG20592-2009 (PN Series), HG20615-2009 (Class Series)

Mechanical Department Standards: JB81-59~JB86-59, JB/T79-94~JB/T86-94, JB/T74-1994

Pressure Vessel Standards: JB1157-82 to JB1160-82, JB4700-2000 to JB4707-2000, B16.47A/B, B16.39, B16.48