1)Spectacle flange 2)TUV certificate: ISO9001 certificate ,PED and AD2000-W0 certificate 3)ASTM A105 ,RST37.2,S235 JR G2 All the products mainly export to European Market ,north America market ,Singapore market ,Mid-east market ,southeast Asia market ,Japan, Korea&UAE market ect.1)Name: carbon steel flange &forged flanges2)Materials : ASTM A105,DIN ST37.2, ASTM A182- F304 F304L, F316,F316L,F321 , ...