... long-term supply stainless steel products, including stainless steel seamless pipes,stainless steel bar and stainless steel sheet. ... -75mmProduction technologyHot rolledCold rolledSurface treatmentCopper coatedGalvanizedothersortingStructural pipe, fluid pipe, boiler pipe, oil pipe, gas pipe, API pipe, alloy ... 310,310S,430,409specificationRound Square rectangle Stainless Steel Seamless Pipes & Tubes