Ningbo Zhehua Heavy Steel Pipe Manufacturing Co., Ltd., a subsidiary of Sutor, is a large-scale enterprise, specialized in manufacturing large-diameter, longitudinal seam, double-side, submerged-arc welded steel pipes and spiral seam, double-side, submerged-arc welded steel pipes. The Company was founded in 2004 and located in the Ningbo Camel Mechanical and Electrical Industrial Park with 80,000 square-meter site , where is of convenient transportation, with State Highway 329 and Expressway around, and Port of Ningbo only 15 kilometers away.

With domestically advanced production line for submerged-arc welded steel pipes, the company is specialized in manufacturing the diameters from 219mm t0 3420mm and thickness from 6mm t0 600mm. The company introduces in advanced production lines covering longitudinal welded and spiral seamed steel pipes with diameter and thickness ranging from 219mm to 3420mm and 6mm to 60mm, respectively. The quality of its products meets international standards, and the company is certifed the production license of pressure piping components, ISO 9001-2000 for quality management system, international certifcation of API 5L PSL2, DNV certifcation etc.

The company has supplied more than 600,000 tons of special pressure pipes and fttings to projects including the Hangzhou Bay Bridge. Zhoushan Water Diversion Project. Yong-Tai-Wen(Ningbo-Taizhou-Wenzhou) Railway, German Bayer Project, Zhenhai Refning and Chemicals Project etc The company now has an annual output of more than 400,000 tons, and its products enjoy good reputation and are shipped to over 30 countries.