Pipes and fittings of longitudinally welded hot-dip galvanized steel pipes with spigot and socket for waste water systems. Dimensions and special requirements for vacuum drainage systems and for drainage systems in ship-building|Pipe fittings, Marking, Ageing tests, Grades (quality), Water, Pipe couplings, Accelerated testing, Mechanical testing, Defects, Leak tests, Thermal testing, Physical properties of materials, Drainpipes, Stress relaxation, Hot-dip galvanizing, Drainage, Testing conditions, Sewers, Hardness measurement, Surface treatment, Type testing, Volume measurement, Compression set, Quality control, Pipes, Spigot-and-socket joints, Steels, Test specimens, Corrosion resistance, Dimensional measurement, Performance testing, Form tolerances, Seamed pipes, Elongation at fracture, Physical testing, Pressure pipes, Waste-water drainage, Ozone, Low-temperature testing, Technical documents, Chemical-resistance tests