Internationally, the commonly used implementation standards for steel pipes in the oil and gas industry are American API standards, such as API PSL1/PSL2, etc., which cover steel grades such as L245, L290/X42, L360/X52, L485/X70, L555/X80, etc. These standards have strict regulations on the material, performance, size and other aspects of steel pipes, ensuring that steel pipes are at medium and high pressure. Huayang steel pipe can meet the requirements of these international standards in production and provide reliable guarantee for global energy transmission.

At home, we also strictly follow the national standards, such as GB/T 9711, whose quality requirements for steel pipes are in line with international standards, which also ensures the high-quality output of steel pipes.

In the field of natural gas transportation, steel pipes of L245, L290 and L360 have been widely used in major projects such as the West-East Gas Pipeline and the East China-Russia Line. Take the East China-Russia natural gas pipeline project as an example. The X80 pipeline steel pipe with a diameter of 1,422 mm was adopted in this project, which realized 100% localization, with a design pressure of 12 MPa and an annual gas transmission capacity of 38 billion cubic meters.

In order to ensure the quality of steel pipes, each submerged arc welded steel pipe production line in Huayang is equipped with two X-ray flaw detection equipment, two on-line ultrasonic flaw detection equipment and mechanical cold expanding equipment.