product:steel pipe Standard:GB/T8163 Chinese national standard Application:General seamless steel tubes for conveying fluids productionSteel ... the steel pipeapplicationsOil, natural gas, chemical industry, power plants, food manufacturing, construction, manufacture ship, paper ... Q195L,Q235 and so on PackingPlastic steel pipe cap ,plastic bag, steel strip bundledCertificateAPI, CCS, ISO9001: ...