National standard spiral steel pipe, abbreviated as 9711.1 spiral steel pipe, 9711.2 spiral steel pipe, material classification: 16Mn spiral steel pipe, Q345B spiral steel pipe, L245 spiral steel pipe, L360 spiral steel pipe, X40-X80 spiral steel pipe, main uses: spiral steel pipe for sewage treatment, spiral steel pipe for water purification, spiral steel pipe for water plants, spiral steel pipe for power plants and chemical enterprises, spiral steel pipe for nuclear power, and spiral steel pipe for transporting flammable fluids, Spiral steel pipes for transporting non combustible fluids, national standard spiral steel pipes, and petroleum ministry standard SY/T5037 spiral steel pipes. This product is made of hot-rolled steel strip as raw material, often spiral formed at high temperature, and welded by automatic submerged arc welding process. The product complies with API SPEC 5L, EN10217, GB/T9711.1, and GB/T9711.2 standards. Mainly used for transporting flammable and non flammable fluids and steel structures in the petroleum and natural gas industries.