... customers can paint mark on the steel pipeapplicationsOil, natural gas, chemical industry, power plants, food manufacturing, construction, ... manufacture ship, paper, medical drug use power, metallurgy,, oil drilling, boilers and pressure vessel ... gradeQ195,Q195L,Q235 and so on PackingPlastic steel pipe cap ,plastic bag, steel strip bundledCertificateAPI, CCS, ISO9001:2000Delivery ...