... GB/T8163 Chinese national standard Application:General seamless steel tubes for conveying fluids productionSteel pipetypeSeamless and ERWsize1/2" ... needs of the customers can paint mark on the steel pipeapplicationsOil, natural gas, chemical industry, power plants, ... gradeQ195,Q195L,Q235 and so on PackingPlastic steel pipe cap ,plastic bag, steel strip bundledCertificateAPI, CCS, ISO9001:2000Delivery ...