Pressure Pipe | processing
Legislation that governs plastics pressure pipe – whether for water or gas – is getting more stringent, meaning that manufacturers must produce to a very high standard
Setting the standard: latest developments in pressure pipe
Standards for pressure pipe are on the increase, with the growth in infrastructure projects – and, often, demand for higher pressures in order to transport greater volumes of either water or gas. In the UK, there is a new British Standard (BS 8588)
governing polyethylene pressure pipe with an alumini- um barrier layer and associated fittings for potable water supply in contaminated ground. Since 2007, Water Industry Specification (WIS) 4-32-19 has specified the materials and performance of piping systems. At the time, these products offered a new way of transporting drinking water through brownfield sites without the need for extensive remedial work. The WIS and the products manufactured to it have
successfully dealt with the problem of laying potable water pipes through contaminated land – prompting manufacturers and water suppliers to translation the requirements into a British Standard. Mike Shepherd, Water UK standards manager, who
chaired the drafting group, said: “The water companies, WRAS [Water Regulations Advisory Scheme] and manufacturers have worked together to accomplish the publication of BS 8588. I am pleased that the British Standard retains all elements of WIS and ensures that systems tested to its requirements will continue to be a
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reliable solution for protecting drinking water.” Water UK will archive WIS 4-32-19 when the new
British Standard is published, and encourage specifiers to reference the new standard. Over the next 12 months, manufacturers will be updating their certification from WIS 4-32-19 to BS 8588. Dominic O’Sullivan, head of product marketing at GPS PE Piping Systems – a member of the British Plastics Federation Pipes Group – pointed out that WRAS approval is given to the whole piping system. “The true benefit of installing these barrier systems
is peace of mind for water suppliers,” he said. “Integrity is assessed through the test for resistance to permea- tion. To comply with BS 8588, manufacturers will need to declare the combinations of pipes, fittings and fusion joints which have been proven to meet this standard.”
Added pressure O’Sullivan was a speaker at the recent Plastic Pipes in Infrastructure conference in London – organised by Applied Market Information – where he explained details of a huge project to install new gas pipe in London. London Medium Pressure is an £18bn project that will lay 29km of gas main over the next eight years. It is expected to affect around 2m people.
May 2017 | PIPE & PROFILE EXTRUSION 27 Main image:
GPS is involved in the London Medium Pressure
project to fit 29km of gas pipe across the city
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PHOTO: ALIAXIS
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