... widely used in petroleum, chemical industry, metallurgy, ships, paper-making, electrical power, aerospace, pharmaceutical, water treatment, chemical fiber, ... ago, with these honors, we are qualified and permitted to produce pressure pipeline unit for oil, chemical industry, ... Dimension: 1/2" to 48" 4, Material: carbon steel A234 WPB WPC A105 A106, alloy steel, stainless steel 304 316 316L5, Packing: ...