Tianjin haolida Steel Pipe Co., Ltd produce and sell Hao Leader 219-2020mm diameter, wall thickness 4-20mm spiral steel pipe products used across the board automatic duplex Lincoln submerged arc welding machine, the implementation of international GB/T9711.1--1997 and oil and gas industry standard SY/T5037-2000, SY/T5040-92 production, and is equipped with X-ray, ultrasonic and hydrostatic pressure for full range of automatic detection, the products are widely used in water engineering, petrochemical industry, chemical industry, power industry, agriculture, irrigation, urban construction, the development of China's 20 key nineties one of the products.