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Technical characteristics of double-sided submerged arc welding spiral steel pipe
Double-sided submerged arc welding spiral steel pipe is more and more welcomed by petroleum and natural gas, slurry transportation, urban construction and other industries because of its advantages such as high pressure bearing capacity, low resistance, low temperature resistance, corrosion resistance, easy installation and maintenance. The whole plate ultrasonic inspection is the first step in the process flow.
In the process of steel tube forming, the steel plate has uniform deformation, small residual stress and no scratch on the surface. The processed steel pipe has more flexibility in the dimension and specification range of the diameter and wall thickness of the steel pipe, especially in the production of high-grade thick-walled steel pipe, especially large-diameter thick-walled steel pipe, which has advantages that other processes can not match, and can meet more requirements of the users in the specification of the steel pipe.
II. Welding can be achieved in the best position by pre-welding and internal and external welding (fine welding), which is not easy to produce defects such as offset, deviation and incomplete penetration, and easy to control the welding quality.
III. The overall mechanical diameter enlargement can effectively improve the dimensional accuracy of steel pipe and the distribution of internal stress of steel pipe, thus avoiding the damage caused by stress corrosion, and at the same time, it is conducive to on-site welding construction.
IV. Nine 100% quality inspections were carried out to ensure the quality of submerged arc welded steel pipes under effective inspection and monitoring during the whole production process.
V. All the equipment of the whole production line has the function of networking with the computer data acquisition system, realizing the real-time data transmission, and collecting the technical parameters and quality indicators in the production process by the central control room.
