What Are The Uses Of Spiral Steel Pipes?

The large spiral steel pipe refers to a spiral steel pipe with a diameter of DN850 or more. The main raw material for production is strip. The strength of spiral steel pipes is generally higher than that of straight seam welded pipes. Welded pipes with larger diameters can be produced from narrower billets. Welded pipes with different diameters can also be produced from billets of the same width. Large spiral steel pipe uses double-sided submerged arc welding technology. Submerged arc welding has the advantages of stable welding quality, high welding productivity, no arc light and little smoke.

Spiral steel pipe standards for natural gas pipelines are 9711 and API. A flaw detection test is required, and a flaw detection needs to be guaranteed. The steel pipes for export need to be painted and beveled. It is convenient for the steel pipe to be welded during the construction process, and the purpose of painting is a simple anti-corrosion procedure.

Gas Pipeline Spiral Steel Pipe:

(1) The design and production of steel pipes with new structures, such as double-layer spiral welded pipes, that is, double-layer pipes welded with strips that are half the thickness of the pipe wall, not only have higher strength than single-layer pipes of the same thickness, but also do not show brittle failure. (2) Vigorously develop the coated pipe. If the inner wall of the pipe is coated with an anticorrosive layer, it can not only extend the service life, but also improve the smoothness of the inner wall, reduce fluid friction resistance, reduce wax accumulation and dirt, reduce the number of pipe cleaning, and reduce maintenance. Cost (3). Develop new steel grades, improve the smelting process technology level, produce and weld quality spiral welded pipes, and widely use controlled rolling and post-rolling residual heat treatment processes to continuously improve the toughness and welding performance of the pipe body; (4) Production Large diameter thick-walled pipes to increase the pressure resistance and increase the main pressure resistance of spiral welded pipes;

Spiral steel pipes for natural gas pipelines can be made into different lengths of steel pipes according to customer requirements. Pipes that require special materials can generally be processed above 80 tons. Non-type spiral steel pipes need to be adjusted. The cost of adjustment depends on the manufacturer and quantity Depending on how much.

Gas Pipeline Spiral Steel Pipe

Oil Pipeline Spiral Steel Pipe is a method of arc welding under the flux layer. It uses the heat generated by the arc burning between the wire and the flux under the flux layer to melt the wire flux and the base metal. Also called double-sided submerged arc welding spiral steel pipe.

The characteristics of spiral steel pipe:

1. High deposition rate and deep penetration capability

2. The quality of the weld is excellent, the compactness is good, and the appearance of the weld is flat and smooth, which can meet the requirements for various properties of the weld.

3. Arc and welding area are well protected.