... )Type:slip on,thread,socket weld,blind 3)Material:A105,A182,Q235,A3,20# 4)Size:DN15-DN1000 Forged Process,all ... ,2280,2283 and so onGB standard : GB,HG,SH,SHJ,SGJMaterial: carbon steel,stainless steel ,alloy steel ASTM A 105, A182, Q235,A3 ... ,20#,16Mn,0Cr18Ni9,1Cr18Ni9Ti and so on.Type:SOP,SOH,WELDING NECK,SLIP ON,BLIND Rf and So flange ...