Since 2004, Tenjan Steel Tube has been a vertically integrated manufacturer of precision steel tubing. We specialize in seamless tubes, cold-drawn profiles, cold-drawn welded tubes and custom-shaped steel tubes—including square, rectangular, hexagonal and complex geometries—compliant with ASTM, EN, DIN and JIS standards.
Our alloy and carbon steel tubes serve critical applications in automotive, high-pressure boilers, construction machinery, hydraulics and more. With ISO-certified quality control, PMI and NDT inspections, we ensure material integrity. From raw material to finished product, we provide tailored, high-precision tubing for OEMs and engineering projects globally.
Talk to Our TeamVertically integrated production, internationally certified quality systems and full process traceability.
As a vertically integrated manufacturer, we maintain complete control from certified billet sourcing—compliant with ASTM, EN, DIN and JIS—to finished tubes, ensuring uncompromised quality.
Our precision cold drawing and rolling process delivers tolerances up to ±0.1 mm, supported by 100% UT/ET testing and full EN 10204 3.1 traceability for demanding hydraulic, mechanical and energy applications.
Tenjan manufactures seamless carbon and alloy steel pipes to ASTM A519 and A106, EN/DIN 10297, 2391 and 10305, plus JIS G3445 specifications.
Operating under IATF 16949 and ISO 9001 quality systems with SGS and TÜV verification, we guarantee full material traceability and dependable performance. Every shipment includes complete mill test documentation with independent laboratory validation.
Precision engineering, certified systems, scalable production and responsive custom service.
We serve 2,000+ clients across more than 20 countries throughout Europe, North and South America, the Middle East, Japan, South Korea, Singapore, Malaysia, Russia, Africa and Southeast Asia. Our ASTM, EN, DIN and JIS-compliant tubes, 99.2% on-time delivery and 85% client retention rate reflect long-term partnerships backed by TÜV/SGS-verified quality and flexible 5,000 kg minimum orders.
More than two decades of technical development, certification and global growth.
Founded in Jiangsu, China.
As a technical partner of the China Academy of Building Research, Tenjan co-developed JG/T 163-2013 compliant rebar coupling sleeves and seismic-resistant steel tubes for high-rise and nuclear structures.
Expanded exports of seamless steel tubes and rebar couplers to 20+ countries across six continents, meeting ASTM, EN and JIS standards.
Achieved ISO 9001 certification.
Earned IATF 16949 certification and began supplying precision steel tubes to global Tier 1 and Tier 2 automotive suppliers, including partners of BMW and Volkswagen.
Expanded annual production capacity to 60,000 tons.
Continued equipment innovation and process upgrades to deliver higher-quality steel tubes that meet evolving international standards.
Explore Tenjan’s integrated production, inspection, testing, warehousing and finishing facilities.
Tell us your material, dimension, tolerance and application requirements for a tailored precision tubing solution.
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