Vitrified clay pipes systems for drain and sewers. Requirements for components of manholes and inspection chambers|Ceramics, Shear testing, Stress, Sleeves (mechanical components), Vitrified china, Sewers, Diameter, Sealing materials, Joints, Marking, Pipes, Watertightness tests, Deflection tests, Internal, Pressure, Straightness measurement, Compressive strength, Testing conditions, Polypropylene, Stress relaxation, Length, Tensile strength, Fluid equipment, Test equipment, Specimen preparation, Loading, Conformity, Dynamic loading, Size, Pipe fittings, Thermal stability, Pipe couplings, Dimensions, Drainpipes, Designations