Changzhou Tenjan Steel Tube Co., Ltd. was founded in 2004. The annual production capacity can reach 60,000 tons under years of development. We are a leading technical manufacturer in the seamless steel tube and rebar coupler industry. Tenjan’s chairman, Wensheng Gu, already has 25 years of experience in the steel tube industry and is the major contributor of national standard Couplers for Rebar Mechanical Splicing JG/T 163-2013.

 
Tenjan specializes in the custom production of high-quality seamless steel tubes under international standards ASTM A519, ASTM A106, ASTM A500, ASME SA500, DIN2391, DIN1629, EN10305-1, DIN17121, EN10297-1, JIS3441, JIS3444 and JIS3445. We provide small-batch customization services, especially for small and medium-sized enterprises. Raw material, internal and external dimensional tolerances, consistency, internal and external surface roughness, straightness, mechanical properties, eccentricity, special shape, alloy steel, and small-diameter thick-walled seamless steel tubes all can be customized. The production range for outer diameter is from 10 to 120mm and for wall thickness is from 1 to 20mm. 

Tenjan, as a seamless steel tube manufacturer, uses its own quality tubes to produce rebar couplers to ensure quality at source. The design capability of rebar couplers especially in respect of mechanical properties, such as tensile strength and breaking force, makes Tenjan the technical leader in the rebar coupler industry.

 
Our steel tubes have been widely used in auto parts, machinery processing, drilling, and other fields. Rebar couplers are utilized in international hydropower projects and bay bridges. We have long-term relationships with customers such as BMW, MCC, CNNP, CRRC, Midea, Sinohydro, China Pingmei, China Academy of Building Research, and so on. We have won the national automobile industry quality system certification IATF16949 and ISO9001. We are dedicated to improving the competitiveness of customers’ products in the industry. Our products were exported to Europe, America, Japan, South Korea, The Middle East, Southeast Asia, and in total six continents over 20 countries, and which have been consistently trusted by customers.