Challenge
Many parts of the UK’s network of cast iron gas mains date back to Victorian times. To improve the safety and reliability of gas supply for residents and businesses, the UK gas industry, the UK Government and the gas regulator Ofgem have embarked on an ambitious 30-year programme to replace ageing gas mains with modern polyethylene (PE) pipes.
To deliver this major phased network upgrade, several of the leading gas infrastructure companies are working with Steve Vick, a leading provider of engineering solutions to the gas, water and nuclear industries. Based on its patented ‘Live Gas Mains Insertion’ technique, Steve Vick is able to insert polyethylene (PE) pipes into old, low-pressure cast iron mains keeping the old main live throughout the process and minimising costs and disruption for customers.
To successfully deliver ‘Live Gas Mains Insertion’ and a range of innovative services, Steve Vick needs to be able to seal mains effectively and isolate different areas of the gas network. As part of its patented services, the company has developed highly specialised expandable foam products to seal old pipes and voids – temporarily or permanently as required.
The expandable foam products used by Steve Vick have to be highly consistent if projects are to run smoothly. Tony Day, Joint MD of Steve Vick, says, “If foam expands more quickly or more slowly than we expect, or the foam expands to a volume we don’t expect, there can be major problems. Foam that expands too much could even pass the end of the pipe we’re working on and seal off a major main, interrupting supply for thousands of people – and that must never happen.”
Solution
For many years, Steve Vick has worked with Wessex Resins to ensure that its expandable foam products, including FOAMPACK™, an annular sealant, and FULLSEAL™, a thixotropic, annular gas sealant, perform consistently. “Wessex Resins understands that our FOAMPACK and FULLSEAL products are mission critical for our business,” says Day. “Using formulations that have been approved for use in the UK gas network, Wessex Resins can ensure that these products perform exactly as we expect them to in the live environment, each and every time.”
To ensure that the industry approved products are formulated in line with strict industry specifications, Wessex Resins conducts in-depth testing during and after the manufacturing process. Jackie Lane, Chief Chemist and Technical Director at Wessex Resins says, “We work to extremely strict specifications for all Steve Vick’s foam products and that includes pre-defined cream times, gel times and foam volumes. These are among the most stringently tested products we manufacture for any of our customers.”
As an additional safety net, Steve Vick tests every batch of expandable foam in-house to ensure compliance with the gas industry’s strict manufacturing standards. “We always test products delivered to us by Wessex Resins, but we’ve never found any issues so far,” says Day. “That’s testament to the high quality and consistency of Wessex Resins’ manufacturing processes.”