CHANGSHU KEWEI ALLOTYPE STEEL TUBE CO., LTD. locates in the International Garden Tourist City - Changshu. The world's longest cable-stayed Sutong Bridge is near to our company, our traffic is extremely convenient as it is only 2 KMS away from the Highway and takes some 90 minutes from Shanghai Pudong airport to our company.

The company has advanced production equipment, perfect testing equipment, (metallurgical & mechanical test, NDT testing, chemical analysis) we have passed the ISO9001-2000 quality certification. We are strictly in accordance with quality system requirements and providing high-quality products. Our products are: fin pipe,cold-drawn, Precision rolling, seamless carbon alloy structural seamless steel pipe, seamless steel tube , products are widely used in motorcycle, automobile, diesel engine, machinery, tools, chemicals, textile machinery, shipbuilding, electric power and other fields, The company has been in the industry for produceing coal mining machinery parts, drill pipes. Products are mainly exported to the United States for all these mining Machinery Manufacturing Corporation. Material American Standard 4130, the Chinese standard 30crmo. Specifications of three: 1. Pipe: outside diameter φ 22.252 bore φ 12.06. Hexagonal tube: B28.58 * B20.75 3. Hexagonal tube: B22.22 * B16 drill pipe finished products: heat treatment, HRC 38 ~ 41, or HRC 40 ~ 44, two kinds of choice for users. Drill finished: 45 ° C to chamfer at both ends, the surface can be made according to user requirements, we can spray anti-rust paint. Drill pipe finished: straightened to Straightness of 1.5mm / m below. Normal length is 3.66m but can made as per customer’s requirements.