Ключевые слова:
Reducing couplings|Butt joints|SI system (metric)|Pipe fittings|Unalloyed steels|Pipe caps|Ferritic steels|Burst tests|Steels|Welded fittings|Test specimens|Pipe tees|Bend couplings|Elbows (pipes)|Diameter|Testing conditions|Alloy steels|Heat treatment|Dimensions|Welding|Marking|Thickness|Welded joints|Petroleum technology