Ключевые слова:
Tensile testing, Bend testing, Fire-tube boilers, Specification (approval), Boilers, Pressure equipment, Filler metal, Visual inspection (testing), Steels, Sheet materials, Welding electrodes, Technical documents, Hot-water boilers, Steam boilers, Marking, Acceptance (approval), Grades (quality), Pipes, Performance testing, Forgings, Quality assurance systems, Quality assurance, Materials specification