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High Grade Spiral Steel Pipe Main Process Characteristics

Edit:Ausin Pipeline Material & Equipment Co.,Ltd   Date:Sep 21, 2017

Spiral steel pipe is a strip coil as raw material, often temperature extrusion molding, automatic double wire double-sided submerged arc welding process welded seam steel pipe. The use of advanced double-sided submerged arc welding process, can be achieved in the best location of welding, not prone to wrong side, welding and not welding and other defects, easy to control the quality of welding.

The spiral steel pipe is fed into the welded pipe unit, rolled by the multi-way roll, the strip is gradually rolled up to form the circular tube with the opening gap, the reduction amount of the squeeze roller is adjusted so that the gap gap is controlled at 1 ~ 3mm, and make the ends of the weld flush. 1. If the gap is too large, the adjacent effect is reduced, the eddy current is insufficient, and the joint between the welds is poor. 2. If the gap is too small is caused by the adjacent effect increases, welding heat is too large, resulting in weld burning; or weld by extrusion, rolling after the formation of deep pit, affecting the surface quality of the weld. After the two edges of the tube are heated to the welding temperature, the common metal grains penetrate and crystallize under the extrusion of the squeeze roll to form a firm weld. If the extrusion force is too large, it will make the molten state of the metal is squeezed out of the weld, the weld metal is reduced, Not only reduces the weld strength, and will produce a lot of internal and external burr, and even lead to welding and other defects.

Process characteristics

The main technical characteristics of spiral steel pipe:

a. During the molding process, the steel plate is deformed uniformly, the residual stress is small, the surface does not produce scratches. Machined spiral steel pipe in the diameter and wall thickness of the size range of greater flexibility, especially in the production of high-grade thick-walled pipe, especially in small and medium-sized thick-walled pipe with other technology can not match the advantages to meet the user In the spiral steel pipe specifications more requirements.

b. The use of advanced double-sided submerged arc welding process, can be achieved in the best location of welding, not prone to wrong side, welding and not welding and other defects, easy to control the quality of welding.

c. 100% of the steel pipe quality inspection, so that the entire process of production of steel pipe are effective in the detection, monitoring under the effective guarantee of product quality.

d. The entire production line of all the equipment with the computer data acquisition system networking functions, to achieve real-time data transmission, by the central control room on the production process of technical parameters.


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