Main standards for flanges
American standard ANSI B16.5 Class150, 300, 600, 900, 1500 (WN, SO, BL, TH, LJ, SW)
Japanese standard JIS 5K, 10K, 16K, 20K (PL, SO, BL)
DIN 2573, 2572, 2631, 2576, 2632, 2633, 2543, 2634, 2545 (PL, SO, WN, BL, TH)
Chemical industry standards, European system: HG20592-97 (HG20593-97~HG20614-97)
Chemical industry standards, American system: HG20615-97 (HG20616-97~HG20635-97)
Ministry of Chemical Industry Standards: HG5010-52~HG5028-58, HGJ44-91~HGJ65-91
Mechanical department standards: JB81-59~JB86-59, JB/T79-94~JB/T86-94
National standard: GB9112-88 (GB9113 · 1-88 to GB9123 · 36-88)
Pressure vessel flange standards: JB1157-82~JB1160-82, JB4700-2000~JB4707-2000
Japanese standard JIS 5K, 10K, 16K, 20K (PL, SO, BL)
DIN 2573, 2572, 2631, 2576, 2632, 2633, 2543, 2634, 2545 (PL, SO, WN, BL, TH)
Chemical industry standards, European system: HG20592-97 (HG20593-97~HG20614-97)
Chemical industry standards, American system: HG20615-97 (HG20616-97~HG20635-97)
Ministry of Chemical Industry Standards: HG5010-52~HG5028-58, HGJ44-91~HGJ65-91
Mechanical department standards: JB81-59~JB86-59, JB/T79-94~JB/T86-94
National standard: GB9112-88 (GB9113 · 1-88 to GB9123 · 36-88)
Pressure vessel flange standards: JB1157-82~JB1160-82, JB4700-2000~JB4707-2000
