Full penetration submerged arc welding of pipeline

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Full penetration submerged arc welding of pipeline

Full penetration submerged arc welding of pipeline

Since the I-shaped groove weld is commonly referred to as flat without groove direct docking, thus reducing the plate beveling process and its vicinity groove surface cleaning process, easy to set the ratio of open groove plate. Groove dimensions greatly reduced, can greatly save welding materials, than the open groove when welding consumables can save more than one times, but also save beveling process oxygen, acetylene and other supplies. Low skill requirements for welders, welder training time is greatly reduced, reducing the cost of training of welders, welder significantly reduced labor intensity. Can greatly improve the welding efficiency, than the open V-shaped groove using SMAW welding improve work efficiency 4 to 5 times higher than the open V-shaped groove on the back of submerged arc welding gouging improve the efficiency of 1 to 2 times.

 

I-shaped groove vacant full penetration weld double submerged arc welding process need to be addressed in terms of technical issues to ensure proper welding heat input (different steels have different welding heat input range applicable), suitable submerged arc weld under the shape factor (submerged arc welding generally require weld shape factor> 1.3), the thickness of 8 ~ 14 mm of steel I-shaped groove full penetration butt welds, choose reasonable parameters, can guarantee full penetration of the case but also to ensure the mechanical properties of the weld. Welds and weld heat affected zone stretching and bending welding parameters according to the welding procedure qualification test results selected impact performance to fully meet the standard requirements, the results of RT testing of the weld seam reaches level requirements.