Spiral steel pipe is a spiral seam steel pipe welded by automatic double-wire double-sided submerged arc welding process. The spiral steel pipe sends the strip steel to the welded pipe unit, and after rolling by multiple rollers, the strip steel is gradually rolled up to form a round pipe blank with an opening gap. Adjust the pressing amount of the squeezing roller to control the weld gap at 1~3mm, and make the two ends of the welded joint flush.

National standard spiral steel pipe is referred to 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 purpose, spiral steel pipe for sewage treatment, spiral steel pipe for water purification, spiral steel pipe for water plant, spiral steel pipe for power plant chemical enterprise, spiral steel pipe for nuclear power, spiral steel pipe for conveying combustible fluid, spiral steel pipe for conveying non-combustible fluid, national standard spiral steel pipe, petroleum department standard SY/T5037 spiral steel pipe. The product is made of hot-rolled steel strip as raw material, often warm spiral forming and automatic submerged arc welding. The product implements API SPEC 5L, EN10217, GB/T9711.1 and GB/T9711.2 standards. It is mainly used in the oil and gas industry to transport flammable and non-flammable fluids and steel structures.