Update to position statement on CIRIA C737
In the position statement of June 20161, the BPF Pipes Group committed to a number of actions. This update is provided on those actions.
We have been actively involved in the development of the European Standards. Substantial progress has been made.
A European Standard2 for installation practices was published in January 2018. Standards for short-term testing3 and long-term testing4, together with the product specification5 are currently being finalised and are due for publication in Spring 2019. A supporting standard covering attestation is under development by the CEN Working Group.
This is the start of a very clear move towards greater consistency of approach, not just in the UK, but across Europe.
The British Board of Agrément (BBA) has confirmed that certification to the former CIRIA publication C680 will remain valid and any new assessments may be undertaken to C680 until such time as certification to C737 can be implemented in a robust and reasonable manner.
To support the transition to C737, we have developed practical guidance targeted at designers and specifiers. We continue to work with BBA, CIRIA and others on implementation and certification.
2 CEN / TR 17179: 2018 “Thermoplastics piping and ducting systems - rainwater infiltration and storage/attenuation systems - Practices for underground installation”
3 prEN 17150 “Plastics piping systems for non-pressure underground conveyance and storage of non-potable water - Test method for determination of short term compression strength of boxes”
4 prEN 17151 “Plastics piping systems for non-pressure underground conveyance and storage of non-potable water - Test method for determination of long term compression strength of boxes”
5 prEN 17152-1 “Plastics piping systems for non-pressure underground conveyance and storage of non-potable water — Boxes used for infiltration, attenuation and storage systems — Part 1: specifications for storm water boxes made of PP and PVC”
Position statement on CIRIA C737 June 2018
Guide to designing geocellular drainage systems to CIRIA report C737