ENSURING INTEGRITY OF WELDED STRUCTURES AND CONSTRUCTIONS AT THEIR LONG-TERM SERVICE WITH APPLICATION OF RENOVATION TECHNOLOGIES

摘要

Main pipelines in the Russian Federation have been in operation for a long time. Rate of failures in them because of initiation of various corrosion and stress-corrosion defects has increased. Application of welding repair technologies allows considerably lowering the risk of pipeline integrity violation. However, application of welding technologies in repair of pipelines in long-term service requires allowing for additional factors, which are not encountered in work performance on new pipelines. This and additional weldability studies, as well as certain requirements to welding consumables and allowing for stressed state resulting from application of renovation welding technologies, are described in this paper.