Mar 2013
Gas Distribution
Fracture Monitoring Using Acoustics
NIA_NGN_0035
Complete
Mar 2013
Sep 2016
National Grid Gas Distribution, Northern Gas Networks and SGN
NGN – D Carter (Distribution Validation Manager) – lead GDN, Syrinix – Paul Linford (Consultant), SGN – Steve Tomlinson (Innovation Project Manager), NGG – Paul Slater (Project Manager)
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Network Innovation Allowance
None
Gas Distribution Networks
£433,963.00

Under the current 30/30 rule (all metallic mains 30m from property must be replaced within the next 30years) gas distribution networks (GDNs) have to prioritize which mains need to be replaced. A number of these mains are in highly populated areas and although don’t have known leakage issues, still need to be replaced under the above rule.There is no method currently available to monitor live mains and to report any significant approaching failure. The 30/30 rule stipulates all mains must be replaced regardless of history so using the 30/30 rule in all cases will result in some mains being replaced many years before the end of their serviceable life.

Syrinix’s existing product, TransientMinder (which detects, interrogates and analyses damaging pressure transients within both distribution and trunk main infrastructure) works on water mains of >16” in diameter in the GB, and the objective of this Project is to investigate and demonstrate that the technology can be transferred on to the GB Gas Network, for the same pipe diameters.

The primary objectives of the Project will be:

  • To give an immediate notification of a fracture event to the pipe line operator enabling a much improved response time
     
  • To locate the fracture event (assuming it falls between monitor stations)
     
  • To potentially detect the onset of a fracture event if pre-failure signals are generated (this is unknown at this time)
     
  • Monitor pipeline 24 hours / day, 7 days / week.

The current Syrinix product has proved its technological capability within the Water Industry and as such this Project, if successful, would generate learning on the feasibility of applying the same concept to >16” metallic Gas mains.

Once the Project has been successfully completed and proved it will be possible for the three collaborating Network Licensees (NGG,NGN & SGN) to deploy the technique using the Syrinix system.

The key learning from this Project would come from the:

  • Ability to monitor large metallic LP pipelines over a variety of distances, ground conditions and locations for the first time
     
  • Review and modification of pipeline replacement schedules and practices
     
  • Ability to defer spend on some pipelines either short term or indefinitely
     
  • Ability to identify Tier 2 pipelines “at risk” from mains with “limited risk”,where there is a mandatory requirement.

Although WWU are not a party to the Project, they will be kept informed of Project developments Once finalised, an industry policy will be developed to allow Networks to know the scope of the technique and allow the Technology to be deployed accordingly.