Nov 2016
Gas Distribution
Leakage Sealant Standards
NIA_WWU_034
Complete
Nov 2016
Jul 2018
Wales and West Utilities, Cadent, Northern Gas Networks and SGN
Matthew Davies – Wales & West Utilities (Lead), Dominic Cummings (Technical) & Ollie Machan – (Innovation) SGN, John Watkins – Cadent, Matthew Sherwood – Northern Gas Networks
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Network Innovation Allowance
GD - Repair
Gas Distribution Networks
£120,000.00
This project will deliver:
  1. The review of the efficiency and effectiveness of the current test methods as a demonstration of the effectiveness of the sealant solution.
  2. The research and review of alternative test methodologies to demonstrate the effectiveness of sealant solutions
  3. Recommendations for the performance requirements for each test method; and
  4. The development of one new LC suite GIS (referred to throughout as the “Private Standard”) for gas leakage sealants. It will be a performance specification producedas a result of the review, re-categorization and amalgamation of the following sixexisting LC suite of GISs.

The standards being considered as part of this project are as follows:

  • GIS/LC8 Part 1 - Specification for methods of repairing leaking ferrous gas mains. Part 1 - External systems (excluding joint and pipe clamps)
  • GIS/LC8 Part 3 - Specification for methods of repairing leaking ferrous gas mains. Part 3 - Internal sealing methods
  • GIS/LC9 - Specification for methods of repairing joints on screwed pipework
  • GIS/LC12 - Specification For External Sealant Injection Systems For Joint Repair On Ferrous Distribution Mains Systems Operating At Pressures Equal To Or Less Than 2 Bar
  • GIS/LC14 - Specification for annular gap sealants
  • GIS/LC25 - Specification For External Sealant Injection Systems For Joint Repair On Ferrous Distribution Mains Systems Operating At Pressures Equal To Or Less Than 2 Bar Performance Specification

To develop and deliver a new combined standard utilising new or alternative test methodologies to allow for the cost effective assessment and implementation of leakage sealants across all UK gas distribution networks. 

Production of a new Leakage Sealant Standard that has been accepted and approved by both GDNs and manufacturers as being technically acceptable, cost effective and practical to implement.