... : SCH20, SGP, STD, SCH40, XS, SCH80, SCH160, XXS 3, Dimension: 1/2" to 72" 4, Material: carbon steel, alloy steel, stainless steel5 ... , ships, paper-making, electrical power, aerospace, pharmaceutical, water treatment, chemical fiber, urban construction, machinery and equipments. We had already obtained ISO9001 ...