Hebei ChongSheng Special Steel Pipe Co.,Ltd.
1, a high peak demand for the pipeline due to the user's gas consumption is very uneven, frequent fluctuations in pipeline pressure, steel pipe to withstand the large alternating stress, pipe has been missing in the alternating stress expansion, if the choice of welding Sewn, high probability of defective spiral welded steel pipe, pipe safety operation will not be guaranteed.
2, the pipeline through the seismic fault zone or through the local high-intensity seismic area, due to the frequent geological activities of these lots, the pipeline will produce longitudinal or axial alternating stress. Spiral weld, the probability of defects is higher than that of straight seam submerged arc welded steel pipe. Under long term stress, the probability of occurrence of accident in spiral welded steel pipe is much higher than that of submerged arc welded straight pipe. Therefore, Submerged arc welded straight seam steel pipe.
3, inside and outside the coating requires a high pipeline, should be submerged arc welded straight seam steel pipe. Spiral submerged arc welded pipe and more welds are generally higher than the submerged arc welded straight seam steel pipe is high, in the pipe is inside and outside the anti-corrosion, the anti-corrosion material and the combination of bare tube less than submerged arc welded straight pipe, Anticorrosive effect is also no submerged arc welded straight seam steel pipe is good.
Hebei ChongSheng Special Steel Pipe Co.,Ltd.