Ключевые слова:
Diameter|Bend couplings|Pipe couplings|Aligned|Pipe fittings|Arc welding|Austenitic steels|Preparation|Dimensions|Electric welding|Pipe junctions|Heat treatment|Heating|Steels|Metal-arc welding|Stainless steels|Butt joints|Ferritic steels|Class I welding|Approval testing|Pipelines|Tolerances of position|Non-destructive testing|Visual inspection (testing)|Pipes|Defects|Gas-shielded welding|Design|Angles (geometry)|Welding|Filler metal|Welded joints