Seamless steel pipe and longitudinal welded pipe compared to the following:
1, high precision
Diameter and wall thickness deviation, straight seam welded pipe smaller than the seamless steel pipe. This is because steel pipe rolling and tube forming are easy to control and therefore have high dimensional accuracy.
2, good mechanical properties
Straight seam resistance welded steel pipe is easy to realize the development and technology of controlled rolling, heat treatment and welding technology. Welding performance can be controlled. Longitudinal welded pipe elongation of 8% to 10% higher than the seamless pipe, mainly vertical welded pipe carbon ratio of about 1/2 of seamless steel pipe.
3, anti-ulcer ability to squeeze
High coaxial straight seam resistance welded pipe wall thickness uniformity. Weld heat treatment, uniform metal, it has a high anti-collapse ability.
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