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 In the output bench equipped with a water cooling system in order to accelerate the cooling, which allows the use of low-alloy composition to reach a special intensity level and low temperature toughness, in order to improve the steel weldability. But the basic steel production plant no. The alloy content of the coil (carbon equivalent) tend to be lower than similar grades of steel plate, which also improves the weldability of the spiral welded pipe. More need to explain that yes, due to the coil of the spiral welded pipe rolling direction is not perpendicular to pipe axis direction (the folder solution depends on the helix angle) of the steel pipe, straight seam steel pipe steel plate rolling direction perpendicular to the pipe axis direction, and thus, the crack resistance of the spiral welded pipe material is superior to straight seam steel pipe. Spiral welded pipe and Longitudinal yield pressure and burst pressure measured and theoretical values ??consistent deviation close. But whether it is the yield pressure or burst pressure, spiral lower than longitudinally welded pipes. Blasting tests also shows spiral welded pipe blasting the mouth of the circumferential deformation rate was significantly greater than the Longitudinal This confirmed that the plastic deformation of the spiral welded pipe than Longitudinal, blasting the mouth is generally confined to a pitch, spiral weld the expansion of the gap from the strong constraints. Spiral welded pipe production is basically the same working conditions, stable continuous process: Longitudinal manufacturing processes is segmented, including the entire board / head / pre-roll / spot / welding / finishing / group process process. This is an important feature of the spiral welded pipe production distinguish it from welded pipe production. 
 Spiral welded pipe, spiral steel pipe, welded steel pipe manufacturer. Production: spiral welded steel pipe, spiral submerged arc welded pipe, dredge pipe, steel pipe, seamless tube, thermal expansion, spiral steel pipe, spiral welded pipe, straight seam pipe, elbow flanges, spiral welded steel pipe welding the pipe volume, T-shaped pipe, pressure pipe, water pipe, straight seam steel pipe, hot-rolled steel, billboards with steel pipes, municipal water supply pipe. The factory has five double-sided submerged arc spiral pipe production line, produce processing-diameter 219-3020mm, wall thickness 4-30mm spiral welded pipe of a variety of materials. U.S. Lincoln welder line of automatic two-sided submerged arc welding products, the implementation the standard SY/T5037-2000 of oil and gas industry, SY/5040-92 the, GB/T9711.1-97 production, the company based on quality, the full implementation of quality management . Passed the ISO9002 quality management system certification, and passed the ISO9001-2000 quality management system certification. And is equipped with X-ray, ultrasonic and hydrostatic pressure across the board automatically detect. This product is widely used in the field of water engineering, petrochemical industry, hydroelectric power industry, agriculture, irrigation and urban construction. The transport of liquids: water supply, drainage; gas transportation: gas, steam, liquefied petroleum gas; for structure: for piling pipe, as pillars, piers, roads, building structures tube. Spiral steel pipe material: Q235 according to customer needs-demand material. Standard basis of the spiral pipe: SY/T5037 standard production and testing.