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Jiangsu Origin Seamless Carbon Steel Pipe. Wide Specification Range: OD 3-90mm, Wall Thickness 0.5-8mm, Tolerance +/- 0.1mm. Multiple Material Grades: Available in E355, E235, 10#, 20#, Q355B, etc. Flexible Customization: Supports OEM, ODM, and full customization from samples or designs. Strict Quality Control: 20 QA/QC inspectors with random visual and function inspection. Low MOQ Support: Accepts small quantity orders with a minimum order of 1 Ton. Multi-Standard Compliance: Meets ASTM A519, DIN2391, SAE J524, EN10305-4, GB/T3639. Versatile Surface Treatment: Oiled surface with superior performance for mechanical applications. Established Manufacturer: 17 years export experience, 8000+ tons annual output capacity.