scope:

This Standard specifies the performance requirements for flexible couplings, bushes and adaptors for use with pipes and fittings in drainage and sewerage systems, normally operated under gravity, both above and below ground and intended to connect different pipes for: ? Repair of damaged pipelines; ? Connecting pipes of different materials and/or diameters; ? Jointing short/cut lengths of pipe; ? Jointing specific pipe systems; ? Jointing post-inserted preformed junctions. Typically a coupling consists of a moulded or extruded flexible sleeve with two clamping bands with or without a shear band. The clamping bands enable the sleeve to form a seal with the pipes to be joined. The shear band gives resistance to shear forces. Connections may be made between pipes which cannot be satisfactorily joined by a coupling alone, of dissimilar sizes or material, by using an appropriate bush or bushes with the coupling.