Size: 1/2" - 72" Thickness: SCH20-XXS Material: carbon steel (seam & seamless) Qualification: ISO9001, API, CE, 90 degree elbow ... XS, SCH80, SCH160, XXS 3, Dimension: 1/2" to 72" 4, Material: carbon steel, alloy steel, stainless steel5, Packing: wooden cases, wooden ... years ago, with these honors, we are qualified and permitted to produce pressure pipeline unit for oil, chemical industry, and ...