... ,reducers,cap,pipe, flanges,socket steel fittings,nippleWTSch5-SchXXS ,such as SCH20, SCH40, STD, SCH80, SC100, SCH120, and SCH160StandardANSI,ASME,API5L,DIN,JIS ... , petroleum industry, construction industry, domestic installation and otherCertificatesISO-9001/2000,API,PEDSpecial design available as requirement carbon steel tee elbow,tee ANSI B16.11 ...