Spiral submerged arc welding steel pipe production line: Lincoln welding system imported from the United States is adopted, and advanced laser tracking technology is adopted for internal and external welding. It can produce welded pipes with a diameter of φ 273 ~ 1420mm, a wall thickness of 5.6~20.6mm and steel grades of API 5L, b and X42~X80, and the product quality exceeds API 5l, GB/T 97 1 1, GB/T 9765438.
External anticorrosion production line: epoxy powder (FBE) and one to three layers of PE and PP can be applied to the external surface of steel pipes with a diameter of φ 377 ~1422 mm. The external anticorrosion production line was completed in February 2004 and put into production in March 2004. The main equipment of the production line is the products of well-known domestic manufacturers, the extruder is provided by Nanjing Rubber and Plastic Machinery Factory, and the intermediate frequency heating device is manufactured by Shanghai Huayi Electric Appliance Factory. This production line can be used for the corrosion protection of φ 159 ㎜-φ 1620 ㎜ diameter steel pipes, with an annual corrosion protection capacity of10.5 million square meters. Anticorrosion types include single-layer epoxy coating, double-layer epoxy coating, two-layer (adhesive, polyethylene/polypropylene) coating and three-layer (epoxy powder, adhesive, polyethylene/polypropylene) coating, and SY/T 04 13-2002, Q/SY XQ 8-2002 and SY/T031shall be implemented.