... size:1/2"to 72" 2)material:carbon steel,stainless steel,etc 3)standard:ANSI B16.5 4)WT:#150-#2500 5 ... , ASME B16.36,DIN2505,EtcMaterialCarbon steel(ASTM A105,Q235,A350LF2,A350LF3,Etc)Stainless steel(ASTM A182 F304, F304L,F316 ... Quality Mangement System Certificate,ISO 14001 Environment Mangement System Certificate,OHSAS18001 Occupational Health & Safety Mangement System Certificate, acquired the license ...