Double submerged arc welded spiral steel pipe with its high pressure capacity, small resistance, low temperature resistance, corrosion resistance, easy installation and maintenance, etc., is more and more oil and gas, slurry transportation, urban construction and other industries welcome.
spiral double welding pipe process
I. double submerged arc welding process, the plate deformation uniformly small, residual stress, surface does not produce scratches. Processing of pipe diameter and wall thickness of the pipe sizes range, greater flexibility, especially in the production of high-grade steel thick-walled steel pipe, large diameter thick wall pipe has the incomparable advantage of other technology, to meet the users in pipe size requirements;
Ⅱ. Presoldering outside welding (the fine welding) the process can be implemented in the best position welding, less prone to the wrong side of the welding partial and incomplete penetration defects such as welding quality, easy to control;
Ⅲ. Overall mechanical enlarged diameter, which can effectively improve the dimensional accuracy of a steel pipe, and improve the distribution state of the stresses in the steel pipe, thus avoiding the damage caused due to stress corrosion, is also conducive to the welded construction of the scene;
Ⅳ. 100% quality check on the steel, so that the whole process of pipe production are effective detection, monitored, to ensure the product quality of the SAW pipe;
Ⅴ. Entire production line equipment have networked with a computer data acquisition system to realize the real-time transmission of data, the quality of the technology in the production process parameters and quality indicators adopted by the central control room.