... , GB,DIN,JIS Place of origin: Shandong, China(mainland) O.D.:73-508mm Secondary or not: Non-secondaryWT:10-30mm Alloy or ... or as your request3. Specification:A106 carbon seamless steel pipeO.D.:73-508mm WT:10-30mm Carbon Steel Seamless PipeStandardANSI,ASTM ,API ... ,Traffic,Aviation,Oil development ect.OD TolleranceD<50mm,+-0.5mm ,D>50MM,+-1%WT TolleranceWT +-12.5%ChemicalC:0.17-0 ...