... standardBS 4504 standardUNI standard: UNI 2276,2277,6083,2280,2283 and so onGB standard : GB,HG,SH,SHJ,SGJMaterial: carbon steel,stainless ... ASTM A 105, A182, Q235,A3,20#,16Mn,0Cr18Ni9,1Cr18Ni9Ti and so on.Type:SOP,SOH,WELDING NECK,SLIP ON,BLIND Rf ...