ISO TR 4191:2014 pdf free

ISO TR 4191:2014 pdf free.Plastics piping systems for water supply
Elastomeric sealing rings are usually made from synthetic materials, e.g. ethylene-propylene-diene (EPDM) copolymer, styrene-butadiene rubber (SBR), or a combination of synthetic and natural rubber. Profiles of the ring and of the socket depend on individual manufacturers’ designs. The rings to be used should be those supplied by the manufacturer for his own assembly system. If the sealing ring is not in place at the time of delivery, the groove should be cleaned, any foreign bodies should be removed, and the ring should be located into the groove as directed by the manufacturer. Sealing ring materials shall fulfil the requirements as specified in EN 681-1 or ISO 4633.
Integral elastomeric ring joints do not normally sustain end thrust. Particular attention should be paid to the correct design of anchor blocks and to their location in the pipeline system (see 7.5).In some countries, it is common practice to provide restraint against thrust by the inclusion of end-load-bearing joints at strategic points within the system. Where this practice is acceptable, the pipe and/or fittings manufacturer’s advice should be sought to help identify the places where end-load-bearing joints should be applied (see 7.5).
The correct assembly of an elastomeric ring seal joint requires that the spigot end of the pipe be chamfered and correctly lubricated prior to insertion into the socket. Lubricant should also be applied to the elastomeric ring once this is fitted into the ring groove.
The lubricant used should not have any detrimental effect on the pipe, fittings, ancillaries, or elastomeric sealing ring and shall not be toxic, shall not impart any taste or odour to the water, and shall not encourage the growth of bacteria.
Solvent cement adhesives and cleaning fluids are flammable, therefore it is important that smoking or any other sources of ignition should be prohibited in the area in which these materials are being used. Solvent cement operations should be carried out in a well-ventilated area. Specific instructions can be found on the package of the Solvent cement.ISO TR 4191 pdf free download.