Ключевые слова:
Steels|Defects|Aligned|Pipe couplings|Pipes|Non-destructive testing|Flanges|Diameter|Welding|Heat treatment|Unalloyed steels|Acceptance (approval)|Welded joints|Bend couplings|Welders|Butt joints|Class II welding|Electric welding|Pipe junctions|Designations|Pipelines|Welded flanges|Dimensions|Heating|Gas-shielded welding|Size|Visual inspection (testing)|Angles (geometry)|Design|Arc welding