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plastic flange bearing
1. Realizing the lack of acceptable standards for GRP piping
systems CEN/TC 155 "Plastics Piping Systems and Ducting Systems"
set up in 1989 its working group WG 14 "GRP Piping Systems"
giving it the responsibility for drafting standards in the fields
of water supply, sewerage and industrial applications.
CEN/TC 155/WG 14 started their work in 1990 and priority has been
given to draft three pipe system standards for water supply and
sewerage. The standards on sewerage are already at formal vote
stage even though do not refer to flange design or specify product
testing for these components. At the time of drafting, there was
very little appropriate documentation/information on flange design
and performance characteristics.
The pipe system standard for industrial applications are currently
being drafted and it is hoped that the results of this research
programme can be incorporated. Additionally, it is intended that
at the first revision stage (5 years hence) the findings of the
research programme will also be incorporated into the water and
sewerage system standards.
CEN/TC 74 was given the task to draft design rules for flanges
made from various materials including those made from thermosetting
resins. As there was little expertise with respect to thermosetting
materials in the Technical Committee contact was made with CEN/TC
155/WG 14 for assistance. CEN/TC 74 and WG 14 agreed that the
latter shall take over the task to draft design rules for GRP
flanges bearing in mind the mating dimensions provided by TC 74.
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