... , slip - on ,socket welding , blind. 2)ASTM A105,DIN ST37.2,ASTM A182-F304 F304L 3)ANSI B16.5 ... ,ASTM A181, Q235, 20#, 20Mn3)Rating : ANSI 150LBS - 2500LBS DIN PN6 - PN160 JIS 5K - 30K HG PN0.25 - PN25 PN2 ... MSS, SP-44, AWWA, API, DIN, JIS, HG, GB, JG, BS.7)All the flanges are according to the ASTM, BS ... , DIN, JIS, EN, GB and customer's request ...