Relative  Standard Flanges we produced:

 1)ANSI B16.5/AISI  (150# ,300# ,600# ,1500# ,2500#) Welding Neck Flange

2)EN1092-1 Flanges

3)JIS (30k ,40k) WN RF (Raised Face)

4)DIN 2631 PN 6  welding neck flanges ,DIN 2632 PN10 welding neck flanges ,DIN 2633 PN16 welding neck flanges ,DIN 3634 PN25 welding neck flanges DIN 2635 PN40 welding neck flanges ,etc .