This specification specifies requirements for materials used in vulcanized moulded solid rubber joint rings for urban and rural water supply and drainage systems, drain pipes, sewers and rainwater pipes. Some general requirements for the finished joint rings are also given. Any other requirements for the performance of the finished joint rings, particularly functional tests for the actual sealing system and related pipeline materials, shall be specified in national standards.
This specification is applicable to joint rings for all pipeline materials, including iron, steel, clay, fihre cement, concrete, pitch fibre, plastics and glass-reinforced plastics.
It is not necessarily applicable to materials for joint rings used in pipelines carrying industrial chemical effluents or hot water and users at joint rings in pipelines where there are spEcial conditions are reminded that thE joint ring material must de selected in consultation with the ring manufacturer.
Joint rings made from cellular rubber material or with an enclosed void as part of their design and joint rings produced by the extruded and joined process are excluded from the scope of this part of the specification and are covered by Part IVa).