In order to ensure the welding quality of the products, the company's three production lines all imported American Lincoln welding equipment and non-destructive testing equipment and X-ray full weld flaw detection. The equipment was introduced to France THALES, COMET and Japan SANKO and ultrasonic flaw detection and hydraulic test. Established a complete quality control point, inspection points and complete process and physical and chemical testing equipment related to the product. The product quality appearance, geometric size, and weld root quality are all in line with national standards GB/T9711.1-1997 Ministry of Petroleum Industry Standard SY/T5037-2000 and US APISPEC5L welded steel pipe standards.