... standard, Japanese standard and so on with a wide range. Carbon Steel Seamless PipeStandardANSI,ASTM ,API,DIN,GB,JISMaterialA106 Gr A,B ... TolleranceD<50mm,+-0.5mm ,D>50MM,+-1%WT Tollerance WT +-12.5%ChemicalC:0.17-0.24%,Si:0.17-0 ... cold drawn,140mm above hot rolled,273mm above hot expandPacking6 steel strip,bundles,Caps , plastic wrap,loading belt