The trend of rapid and stable growth in demand for spiral steel pipes in the market will not fundamentally change. Whether the spiral steel pipe market can maintain a stable and rapid development hub depends on changes in demand. The macroeconomic regulation at the policy level will bring about a certain slowdown in the market growth rate in the future.
Spray (throwing) rust removal is achieved by using a high-power motor to drive the spray (throwing) blades to rotate at high speed, causing abrasives such as steel sand, steel shot, iron wire segment, and minerals to spray (throwing) the surface of the steel pipe under centrifugal force. This not only completely eliminates rust, oxides, and dirt, but also achieves the required average roughness of the steel pipe under the fierce impact and friction of the abrasive.
Spiral pipes are mainly used for oil and natural gas transmission pipelines, and their specifications are represented by outer diameter * wall thickness. Spiral pipes can be welded on one side or both sides, and the welded pipes should ensure that the water pressure test, tensile strength of the weld seam, and cold bending performance meet the requirements.
Double sided submerged arc welded spiral steel pipes are increasingly popular in industries such as oil and gas, slurry transportation, and urban construction due to their advantages of high pressure bearing capacity, low resistance, low temperature resistance, corrosion resistance, and convenient installation and maintenance. The process flow first involves full plate ultrasonic inspection.
The ministerial standard for spiral steel pipes is SY/T5037-2000 (Spiral submerged arc welded steel pipes for ordinary fluid transmission pipelines). This standard is a ministerial standard, and GB/T9711 is a national standard. The national standard has higher requirements for steel pipes than the ministerial standard.
Spiral pipes, also known as spiral steel pipes or spiral welded pipes, are made by rolling low-carbon structural steel or low alloy structural steel strips at a certain helix angle (called forming angle) into pipe blanks, and then welding the pipe seams together. It can produce large-diameter steel pipes from narrower strip steel.