Research of accidents pipelines

The durability and reliability of operation steel pipelines water supply sewage systems is determined in particular by the quality their welded joints, which turn depends both on composition materials used manufacture observance welding technology. impurities transported liquids, can cause corrosive destruction materials, also has a significant impact pipeline systems. These phenomena are especially important hot industrial drainage systems, where destructive influence physical factors chemical environment be decisive. It was found that loss strength caused improper operation, under conditions micro-flaws joints appear, leads to destruction. results examinations experimental studies welds process presented. An external inspection carried out, determination structure parameters welds, layer-by-layer analysis corrosion damage inner surface. premature long-term stressed state. Under such circumstances, uneven coarse-grained seam, presence non-metallic inclusions metal structure, violations technology had critical strength. In order increase corrosion-mechanical resistance pipelines, it necessary modify surfacing weld break down significantly reduce inclusions, as well improve manual arc with coated electrodes, particular, root layers seams.