... :1/2"-80" WT:150-2500lbs ClassA-E Material:cs,alloy steel, ss Qualification:ISO9001,API,CE ... size 1/2" to 24" ASME B16.526"to 80" ASME B16.47TypeWNF, SO, SWF, ... S32750,A705 631,632,A961, A484, Alloy steel(ASTM A694 F42,F46,F52,F56,F60,F65,F70, A182 ... Petroleum Corporation.We are also qualified the standard material supplier of China National Offshore Oil Corporation and ...