... SP-44, AWWA, API, DIN, JIS, HG, GB, JG Specifications 1)welding neck , slip - on ,socket welding , blind. 2 ... )ASTM A105,DIN ST37.2,ASTM A182-F304 F304L ... , Q235, 20#, 20Mn3)Rating : ANSI 150LBS - 2500LBS DIN PN6 - PN160 JIS 5K - 30K HG PN0.25 ... to the ASTM, BS, DIN, JIS, EN, GB and customer's request. slip-on stainless flanges