... widely used in petroleum,chemical industry,electric power,boiler, SpecificationsAPI, ISO: 9001:2000, CCS approved 1/2" to 72" SCH5S TO ... ’’PressureSCH 5S TO SCH 160,XXSConnectionButt WeldingStandardANSI, JIS, DIN, EN, ISO, GB, SH AND HGMaterialCarbon, Stainless and AlloyCertificateAPI, ISO9001:2000, CCSPackingwooden ...