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Reference Number NIA_CAD0013
Title Multi-Occupancy Building Cured In Place Lining (NuFlow): Further Development of Technology for GD Riser Systems
Status Completed
Energy Categories Fossil Fuels: Oil Gas and Coal(Oil and Gas, Refining, transport and storage of oil and gas) 100%;
Research Types Applied Research and Development 100%
Science and Technology Fields PHYSICAL SCIENCES AND MATHEMATICS (Metallurgy and Materials) 10%;
ENGINEERING AND TECHNOLOGY (Civil Engineering) 10%;
ENGINEERING AND TECHNOLOGY (Mechanical, Aeronautical and Manufacturing Engineering) 80%;
UKERC Cross Cutting Characterisation Not Cross-cutting 100%
Principal Investigator Project Contact
No email address given
Cadent Gas
Award Type Network Innovation Allowance
Funding Source Ofgem
Start Date 01 April 2018
End Date 01 April 2020
Duration ENA months
Total Grant Value £347,600
Industrial Sectors Energy
Region London
Programme Network Innovation Allowance
 
Investigators Principal Investigator Project Contact , Cadent Gas (100.000%)
  Industrial Collaborator Project Contact , Cadent Gas (0.000%)
Web Site https://smarter.energynetworks.org/projects/NIA_CAD0013
Objectives The proposed project will build on the success of existing work completed to date (qualifying the efficacy of the product for interim use on the Gas Network)Cadent are currently considering implementing this technology into its network to provide an alternative to replacement.This project seeks to test the NuFlow product against a program of long term testing to qualify its efficacy for permanent use on gas riser networks. 2.1 Long Term Tensile Failure Strength There is a requirement that the tensile creep strength at 23°C±2°C out to 30 years shall be determined for the Nu Line material in accordance with BS EN ISO 899-1 – Plastics – Determination of creep behaviour – Part 1: Tensile creep. Test specimens shall be of the same shape and dimensions as specified in ISO 527-2 – Plastics – Determination of tensile properties – Part 2: Test conditions for moulding and extrusion plastics. It is assumed that the requirements for the test specimens to be used for determination of long term tensile failure strength shall be agreed between ROSEN and Nu Flow and the specimens supplied by Nu Flow. The deliverable shall be a test report detailing compliance with Clause 3.7.5.1 of the draft Gas Industry Standard (GIS) for polymeric pipe lining systems 2.2 Chemical Resistance It is a requirement for Nu Line to be resistant to chemical attack from synthetic gas condensate, odorants typically used by Cadent, monoethylene glycol used in the fogging process and lubricating oil which can enter the GD system. The Nu Line resin shall be subjected to an ageing regime of 1500 hours at 23°C in accordance with Table 2 of BS ISO 4437-1:2014 to quantify the influence of these chemical environments on hardness, volume, and tensile properties and shall show no signs of damage or breakdown. It is assumed that the requirements for test specimens to be used for the chemical resistance tests shall be agreed between ROSEN and Nu Flow and the specimens supplied by Nu Flow. The deliverable shall be a test report detailing compliance with Clause 3.7.5.2 of the draft Gas Industry Standard (GIS) for polymeric pipe lining systems. 2.3 Long Term Leak Sealing Performance – Lined JointsTests shall be conducted on tubular sections of 1 inch carbon steel pipe with single central straight screwed connectors slackened off to give a leakage rate of approximately 0.05m3/h. The tubular sections shall be lined using the Nu Flow technique. . Post cure, and prior to any long term evaluation, the zero time liner leak strength shall be evaluated to give the pressure at zero time. Liner leak strength regression curves shall then be generated at selected temperatures and pressures aligned with ISO 899-1 methodology in order to determine 30 year leak strength at 23°C±2°C. It is assumed that the requirements for the test specimens to be used for determination of long term leak sealing performance shall be agreed between ROSEN and Nu Flow and the specimens supplied by Nu Flow. The deliverable shall be a test report detailing compliance with Clause 3.7.5.3 of the draft Gas Industry Standard (GIS) for polymeric pipe lining systems. 2.4 Long Term Sealing Performance – Hole Spanning Tests shall be conducted on 1 inch steel and copper pipe which has been drilled through-wall and the hole plugged flush with the internal surface of the tubular using a stopper. Pipe sections shall be lined using the Nu Flow technique at the specified cure temperature. Post cure, the stopper shallbe removed, and prior to any long term evaluation the zero time liner leak strength shall be evaluated to give the pressure at zero time. Regression curves shall be generated at selected temperatures and pressures aligned with ISO 899-1 methodology in order to determine the 30 year hole spanning strength at 23°C±2°C. It is assumed that the requirements for the test specimens to be used for determination of long term leak sealing performance shall be agreed between ROSEN and Nu Flow and the specimens supplied by Nu Flow. The deliverable shall be a test report detailing compliance with Clause 3.7.5.4 of the draft Gas Industry Standard (GIS) for polymeric pipe lining systems.Cadent has already achieved success with this technology with field trials carried out, one on a redundant system and another on a MOB where customers had been off gas for several months due to asbestos complicating replacement works. The use of NuFlow onsite allowed work to be completed within 3 days under the G23. This is currently monitered under this document and there has been no reported issues to date. Following learning from these projects the NuFlow material and process have been refined to create a more consistent product that has built on the trials completed so far. To confirm the performance of this material, and process, we will undertake short and long term material testing to ensure it meets the required standard. The testing proposed has been recommended by Rosen for Cadent following the review of the GIS and completing a gap analysis to identify the testing requirements. These are: Long term assessment and assurance of the NuLine system including a test report detailing compliance with clause 3.7.5 of the draft GIS for polymeric pipe lining system in the following areas- • Long term tensile failure strength - resin material property • Chemical resistance – resin material property • Long term leak sealing performance – Lined joints and hole spanning
Abstract The objective of the project is to provide technical and operational assurance in areas relating to long term performance properties of the NuLine product. And subject to Network policy approval achieve permanent status of the NuLine product. This will be achieved by Rosen completing all required testing for approval of permanent status of the NuLine product identified by Rosen.
Publications (none)
Final Report (none)
Added to Database 09/11/22