Ключевые слова:
Pipe fittings, Iron, Pipes, Pipe couplings, Plastics, Pipework systems, Polyethylene, Polyvinyl chloride, Dimensions, Diameter, Preferred sizes, Dimensional tolerances, Performance, Mechanical properties of materials, Ductility, Temperature, Pressure, Type testing, Mechanical testing, Leak tests, Tensile testing, Pressure testing