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Welding is one of the most important processes in many technical fields, including construction, manufacturing, energy, transport, machinery, and metal fabrication. A welded joint may look simple from the outside, but its real quality depends on many controlled factors: the material, welding method, heat input, filler metal, welder skill, testing method, and working conditions. This is why welding procedure qualification is so important. ISO 15614 gives a clear framework for

Welding is one of the most important processes in many industries. It is used to build strong structures, machines, vehicles, equipment, tanks, pipelines, and many other metal products. Because welded parts often carry weight, pressure, heat, or movement, their quality must be managed carefully from the beginning to the end of production. ISO 3834 gives clear quality requirements for fusion welding of metallic materials. Its main value is that it helps companies control weldi