DNV Laucnhes RP for TCP

15 Aug 2017

DNV GL has launched a recommended practice (RP) that supports operators in their choice of thermoplastic composite pipes instead of steel or traditional flexibles for pipelines or risers. DNVGL-RP-F119 Thermoplastic Composite Pipes (TCP) was developed through a DNV GL-led joint industry project involving 18 companies covering the whole supply chain; from polymer producers, via TCP manufacturers, to oil companies as the end users. The RP provides recommendations and information, including technical provisions and recommended acceptance criteria pertaining to TCPs in offshore use. The recommended practice addresses three key main areas:

  • Design of TCPs for designated offshore use
  • Testing of performance characteristics for TCP materials and pipes
  • Analysis of TCPs as part of an integrated system

Thermoplastic composite pipes offer many advantages across all lifecycle stages of a pipeline or riser:

  1. Design: easy-to-tailor strength and good fatigue capacity, suited to deeper waters and with resilience to hydrocarbon and sour fluids and elevated temperatures
  2. Manufacture:continuous spoolable lengths and fully bonded construction with the same thermoplastic material used for the liner, composite layers and outer coating
  3. Installation and decommissioning:cost-effective, light weight and fully spoolable
  4. Operation:no corrosion, high thermal and pressure tolerance and minimal flow resistance allowing higher fluid flow rates and pumping pressures

Per Anker Hassel, project manager with DNV GL – Oil & Gas, said: “Thermoplastic composite pipes are a new, robust lightweight pipe alternative that will impact field layout, and installation methods, and ultimately reduce the cost level.”

Espen Cramer, global service director with DNV GL – Oil & Gas, said: “As the recommended practice describes the requirements for flexible TCP for offshore applications, it builds trust and confidence in the safe and reliable use of these pipelines.

This opens up new, cost-efficient, innovative offshore pipeline solutions, which are of vital importance for reducing overall costs in the industry.”

TCPs have a variety of application areas offshore, including: flowlines, risers, jumpers, choke and kill lines, expansion spools, access lines and chemical injection lines, as well as commissioning and intervention lines.

DNV GL says the RP targets operators, contractors, suppliers, and others seeking acceptance for using TCP in offshore operations, and is intended for:

  • Suppliers of TCP for offshore operations and suppliers of raw materials for such pipes that are seeking market access for their products
  • Operators and contractors seeking acceptance for using TCP in offshore operations
  • Suppliers and recipients of TCP which need a common technical basis for contractual reference.

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