Laying clay pipes in soft ground

Where trench formation has little bearing strength and won’t support pipe bedding material effectively, it’s necessary to provide a stable formation before pipe laying. Such conditions usually occur in peat, silty ground, soft clays, running sand, or in artificially-filled ground. Although trench formations are sometimes stabilised with concrete, it’s unlikely to guarantee long-term stability, so a flexible bedding construction is […]

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Naylor win Queen’s Award for Enterprise

CPDA Member and pipe manufacturer Naylor Clayware has been honoured with a prestigious Queen’s Award for Enterprise in the International Trade category for its high-performance products which are used in demanding applications around the world. Naylor Clayware is a division of Naylor Industries plc, a fourth generation family business based in Barnsley, South Yorkshire. Clay pipe production is an activity […]

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Clay drainage: strong in demand, strong in supply claim manufacturers

The Construction Leadership Council (CLC) has issued a warning, via a joint statement from John Newcomb, CEO Builders Merchants Federation and Peter Caplehorn, CEO Construction Products Association, co-chairs of CLC Product Availability work group on the 7th April 2021, to the industry that shortages of building products and materials are set to get worse before they get better. Global supply […]

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After some 12 months of intensive engineering improvements involving significant cash investment, the Denlok Clay jacking pipe manufacturing facility at the CPDA Member Naylor Drainage Cawthorne site in Barnsley, UK has increased its capacity 3-fold to ensure the requirements of both the UK and Export markets can be fully satisfied. The production facility revamp was undertaken after a full review […]

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New Chair for CPDA

The Clay Pipe Development Association has a new Chairman- Mike Ward from Wavin. Mike lives inYorkshire and is a keen mountain biker & walker. Mike has worked in the construction sector at senior levels for the last 25 years, having been Managing Director at Metsa Wood and Jeld-Wen; he has worked for Wavin since 2018. Mike commented “I am honoured […]

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Business as usual

The UK Clay Pipe industry remains very much open for business. Whilst the early stages of the pandemic reduced demand and resulted in some throttling back of production, all CPDA member companies stayed open to service customer requirements. Deliveries included loads supplied to key infrastructure and healthcare schemes. Although certain construction materials are currently reported as being in short supply, […]

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The eighth edition of Sewers for Adoption (SfA8), entitled “A Design and Construction Guide for Developers” was published as a draft in April 2020 and sets out clear standards for sustainable drainage systems (SuDS) for the first time. Prior to full implementation, this version of Sewers for Adoption will exist alongside versions 6 & 7 of the guide. In that period, while some companies may […]

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The chemical resistance of pipe materials has emerged as an important issue, given the increasing development of contaminated brownfield sites. CPDA members are already well positioned in this area, given the excellent chemical resistance of standard clayware; it is for this reason that clay pipes are frequently specified for use on such sites. The performance of standard clay systems can […]

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Site visit to CPDA Member Hepworth Clay

CPDA member Hepworth Clay (Wavin Ltd) recently hosted a visit of fellow CPDA members to their impressive factory in Sheffield showcasing the technology and processes used to manufacture their clay pipes. The Hepworth Clay drainage system comprises a range of perforated and non-perforated vitrified clay pipes supplied complete with factory-fitted push-fit flexible couplings or plain ended with separate couplings to be […]

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CPDA attend the bi annual CEN / TC 165 Wastewater Engineering meeting

Paul Wydell of Hepworth Clay represented CPDA at the bi annual CEN / TC 165 Wastewater Engineering meeting in plenary session. The meeting location which rotates to be hosted by different European standardisation organisations was held by the Cyprus Organisation for Standardisation. The purpose of the plenary meeting was to give and receive updates from all the different European working […]

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