04 September 2018
04 September 2018
Haydale has produced and delivered eight composite general transition piece (GTP) sealing systems to National Grid UK, and has received an expression of interest for a further 60 over the next six years.
The lightweight, removable GTP is manufactured from glass fibre reinforced vinyl ester resin. It is used for sealing around pipelines where they pass through concrete walls, such as inspection pits, across a multitude of utilities including gas, water and oil and gas. This allows for time and cost-effective inspection and repair at pipe transitions.
This first commercial order has seen production and delivery of eight GTP units for transitions across two National Grid gas sites on the UK gas transmission network.
“During the next six years, up to 60 of these units are likely to be installed in the national transmission system and will significantly improve safety as well as creating savings of up to £5 million in the next five to ten years, with further savings beyond that,” reports Paul Ogden, a Senior Civil Engineer with National Grid.
Using the current cast concrete method proves costly as seals degrade over time, allowing groundwater and fine material to flow through the transition, potentially causing damage to the pipe and its coating. Inspection and replacement is also time and labour intensive with added safety measures caused through increased use of heavy machinery on-site.
Haydale’s lightweight GTP system has been jointly developed with National Grid via its innovation initiative. It provides effective sealing around the pipe for up to 50 years, and allows pipe transitions to be inspected by a two-man crew, without the need for excavation, demolition or lifting equipment.
The system was given an Award of Merit at National Grid’s 2016 Chairman’s Award, held in New York, US.
“The removable composite GTP system is a huge step forward in safety and efficiency, solving a major problem faced by utility providers," says Keith Broadbent, Managing Director Composites at Haydale. "Haydale is pleased to have found a solution and is working alongside National Grid to see the first fully installed and in use in the UK. With such a novel, advantageous innovation, it is not surprising to see our GTP system move from research and development to commercialisation so quickly. We look forward to working with more utilities companies, globally.”
Photo provided by Haydale
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