Kijlstra is awarded second WRc approval

Kijlstra, Europe’s leading pre-cast drainage manufacturer, has been awarded its second WRc certification.

Having already received approval for its square manholes, Kijlstra has recently achieved WRc Approved™ certification PT/341/0713 for its range of pre-cast panel storage systems.

WRc Approved™, which is a voluntary ‘fitness for purpose’ certification scheme conducted by WRc plc (Water Research Centre), is designed for manufacturers to demonstrate the quality and performance of their products and services both in the UK and internationally.

Kijlstra were awarded WRc Approved™ certification following their assessment on a wide range of installations using Kijlstra’s pre-cast concrete panel system. The system has been used for structures ranging in size from 100m3 to 900m3 which were undertaken by several different contractors on a variety of water storage applications. These included attenuation tanks, CSO chambers, ASP chambers and pumping stations on projects for Scottish Water, Severn Trent and United Utilities.

One of the key benefits of the Kijlstra pre-cast panel systems that was highlighted within the WRc assessment was the fact they are assembled on-site to the required shape and dimensions of the structure in accordance with a assembly schedule issued by Kijlstra for each site. The panels are then sealed in-situ to form a leak-tight structure, reducing the need for casting and curing on-site. This helps to reduce construction time, reducing risks associated with weather conditions when casting on site, and improving health and safety by significantly reducing manual handling.

WRc also stated that pre-cast panels which are factory produced from fabrication of steel reinforcement and casting of the concrete provide greater efficiency, consistency and a higher degree of quality control compared with fabrication and casting on-site.

As part of the approval process, site visits were made by the assessor from WRc. These included visiting Kijlstra’s production facilities in Dratchen, Netherlands. As a component of the production audit, WRc witnessed pressure testing of a purpose-built 1m3 structure to demonstrate the leak tightness of the jointing options of the system. The structure was pressurised and successfully tested to 1.5 bar /15m which is a greater pressure than maximum dimensions of any panel.

WRc also visited the recently installed attenuation tank system for a £2.8million sewage treatment works at Crankley Point for Severn Trent Water. Designed by Kijlstra, the tank which was installed by NMC Nomenca, measured 60m in length, 15m in width and approximately 6m in depth.

David Williams, commercial director for Kijlstra UK, said: “We are delighted to have been awarded a further WRc approval which recognises and endorses the quality and performance of our pre-cast products and systems.”