Ключевые слова:
Pipes, Pipe fittings, Pipe connections, Welding, Steels, Stainless steels, Spigot-and-socket joints, Waste-water drainage, Pipelines, Drainage, Seals, Pressure, Prefabricated parts, Watertightness tests, Thermal stress, Temperature, Corrosion protection, Corrosion resistance, Straightness measurement, Dimensions, Marking, Quality control, Type testing