How to control the weld reinforcement of submerged arc welded steel pipe
Whether it is straight seam submerged arc welded pipe (LSAW) or spiral seam submerged arc welded pipe (SSAW), if you want to see the welding quality, the reinforcement height and shape control of the inner and outer welds of the steel pipe, whether the weld streamline is regular, etc. The first thing to look at. If the weld reinforcement is large, the stress concentration factor of the weld will be large, and stress corrosion cracks will easily form. In addition, the high external weld reinforcement is not conducive to the anti-corrosion work of the pipe, and has an impact on the pipe shape after hydraulic expansion; the high internal weld reinforcement will increase the energy loss of the conveying medium. Therefore, in order to prolong the service life of the steel pipe, in the production process of the submerged arc welded pipe, the weld reinforcement must be effectively controlled.
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