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