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Home>>Forged Flanges>>Flange manufacturing standards
American Standard Series
Standard Diameter range Pressure rating
ANSI B 16.5(88) 1/2"-24" Class 150,300,600,900,1500,2500
ANSI B 16.47(90) 26"-60" Class 150,300,600,900
ASME B 16.5(96) 1/2"-24" Class 150,300,600,900,1500,2500
ISO7005-1(92) 1/2"-24" PN2.0 5.0 11.0 15.0 26.0 42.0
BS4504-3.1(89) 1/2"-24" Class 150,300,600,900,1500,2500
JPI7S-15-93 1/2"-24" Class 150,300,600,900,1500,2500
NF E29-203 1/2"-24" PN2.0 5.0 11.0 15.0 26.0 42.0
API605-81 26"-60" Class 150,300,600>
ASME B 16.36(96) 1"-24" Class 300,400,600,900,1500,2500
German Standard Series
Standard Diameter range Pressure rating
DIN 2630 WN DN1200-DN2400 1 Bar
DIN 2631 WN DN10-DN3600 6 Bar
DIN 2632 WN DN200-DN3000 10 Bar
DIN 2633 WN DN10-DN2000 16 Bar
DIN 2634 WN DN200-DN1000 25 Bar
DIN 2635 WN DN10-DN500 40 Bar
DIN 2636 WN DN10-DN400 64 Bar
DIN 2637 WN DN10-DN350 100 Bar
DIN 2638 WN DN10-DN300 160 Bar
DIN 2573 PL DN10-DN500 6 Bar
DIN 2576 PL DN10-DN500 10 Bar
DIN 2527 PL DN10-DN500 6 10 16 25 40 Bar
DIN 2501 WN DN15-DN500 10 16 25 40 63 100 160 250 320 400 Bar
DIN 2566 TH DN15-DN500 10 16 Bar
DIN 2655 PL DN15-DN500 0.25 0.6 1.0 1.6 2.5 4.0 Bar
DIN 2656 PL DN15-DN500 0.25 0.6 1.0 1.6 2.5 4.0 Bar
Japanese Standard Series
Standard Diameter range Pressure rating
JIS B 2220 PL DN10-DN400 5K
JIS B 2220 SO DN450-DN1000 5K
JIS B 2220 PL DN10-DN225 10K
JIS 2220 SO DN250-DN1000 10K 
JIS 2220 SO DN10-DN1200 16K 20K 30K
JIS 2220 WN DN15-DN400 30K
National Standard Series
Standard Diameter range Pressure rating
GB/T 9112-9113.4-2000 DN10-DN2000  PN 0.25 0.6 1.0 2.5 4.0 6.3 10.0 16.0 Mpa
JB/T 74-86.2-94 DN10-DN1600  PN 0.25 0.6 1.0 2.5 4.0 6.3 10.0 16.0 20.0 Mpa
HG 20592-20626-97 DN10-DN2000  PN 0.25 0.6 1.0 2.0 2.5 4.0 5.0 6.3 10.0 11.0  
 15.0  16.0 25.0 26.0 42.0 Mpa
SH 3406-96 DN10-DN1500  PN 1.0 2.0 5.0 6.8 10.0 15.0 25.0 42.0 Mpa
GB/T 17241.1-17241.7 DN10-DN4000  PN 0.25 0.6 1.0 1.6 2.0 2.5 4.0 5.0 Mpa
GB/T 15530.1-15530.8 DN10-DN1800  PN 0.6 1.0 1.6 2.0 2.5 4.0 5.0 Mpa
Power Ministry Series
Standard Diameter range Pressure rating
D-GD86-0510-0537 DN15-DN2000  PN 0.25 0.6 1.0 1.6 2.5 4.0 6.4 10.0 Mpa
DG0511-0541 DN15-DN1000  PN 0.25 0.6 1.0 1.6 2.5 4.0 6.4 10.0 20.0 32.0 Mpa
Pressure Vessel Series
Standard Diameter range Pressure rating
JB/T 4701-2000(甲型) DN300-DN2000

 PN 0.25 0.6 1.0 1.6 10.0 Mpa
JB/T 4702-2000(乙型) DN300-DN3000  PN 0.25 0.6 1.0 1.6 2.5 4.0 Mpa
JB/T 4703-2000(长颈) DN300-DN2000  PN 0.6 1.0 1.6 2.5 4.0 6.4 Mpa
Shipping Series
Standard Diameter range Pressure rating
GB573-581-76 DN20-DN500  PN 0.6 1.0 1.6 2.5 4.0 6.4 Mpa
GB2506-2507-89 DN10-DN2000  PN 0.25 0.6 1.0 1.6 2.5 Mpa
GB4450-84 DN20-DN500  PN 0.6 1.0 1.6 Mpa
GB10746-10749-89 DN10-DN600  PN 0.6 1.0 1.6 2.5 4.0 6.4 Mpa
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