Reinforced thermoplastic pipe

Reinforced thermoplastic pipe (RTP, also known as flexible composite pipe or FCP) is a generic term referring to a reliable high strength synthetic fibre (such as glass, aramid or carbon) or high strength steel wire reinforced pipe system. Initially developed in the early 1990s by Wavin Repox, Akzo Nobel and by Tubes d'Aquitaine from France, who developed the first pipes reinforced with synthetic fibre to replace medium pressure steel pipes in response to growing demand for non-corrosive conduits for application in the onshore oil and gas industry, particularly from Shell in the Middle East.[1] Because of its expertise in producing pipes, Pipelife Netherlands was involved in the project to develop long length RTP in 1998[2]. The resulting system is marketed today under the name SoluForce. More recently the technology of producing such pipe, including the marketing, rests with a few key companies.

Typically, the materials used in the construction of the pipe might be Polyethylene (PE), Polyamide-11 or PVDF and may be reinforced with Aramid or Polyester fibre or high strength steel wire, although other combinations are used.[3] It is available in coils up to 400 m (1,312 ft) in length. The pipes are available in pressure ratings from 30 to 450 bar (3 to 45 MPa; 435 to 6,527 psi). Recent innovations include gas tight RTP and RTP for high operating temperatures[2].

Some RTP systems are fully certified according to certification bodies like the American Petroleum Institute.[4] Over the last few years this type of pipe has been acknowledged as a standard alternative solution to steel for oilfield flowline applications by major oil companies and operators.[5] RTP are used for a variety of on- and off-shore applications, including: high pressure water injection pipelines, water transport solutions, effluent water disposal, oil and gas flowlines, oil and gas gathering lines and gas pipeline.

An advantage of RTP is its very fast installation time compared to steel pipe, as average speeds up to 1,000 m (3,281 ft)/day have been reached installing RTP in ground surface (which is not possible with steel pipes when considering the welding time).[6] Primarily, the pipe provides benefits to applications where steel may rupture due to corrosion (RTP is corrosion free) and installation time is an issue.

Technology and history

The idea of synthetic fibre reinforced pipe has origins in the flexible hose and offshore industry where it has been frequently used for applications such as control lines in umbilicals and production flowlines for over 30 years. However, the commercialisation and realisation of a competitive product for the onshore oil industry came from a partnership between Teijin Aramid (supplier of aramid fibre Twaron) and Wavin Repox (manufacturer of reinforced thermoset pipes), where Bert Dalmolen initiated a project to develop such a pipe. He was later employed by Pipelife where a state of the art production line was developed to produce long-length RTP. Pipelife also developed a pipe reinforced with steel wire to achieve even higher pressure ratings of 450 bar (45 MPa; 6,527 psi) using steel reinforcement. Mr Chevrier (Tubes d'Aquitaine) also developed machinery that could produce such pipes, but was not successful in commercialising RTP.[7][8]

Although these kind of pipes have been developed for the oil and gas industry, they are also used for domestic gas, mining, CO2 and hydrogen applications.

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See also

References
Notes
  1. Tubes d'Aquitaine - Inventor of RTPs Archived 2008-09-05 at the Wayback Machine
  2. "Pipeline Challenges in Oil and Gas Industry". 2019-02-14.
  3. Different materials for RTP - CEAC Automated Dynamics Archived 2007-10-06 at the Wayback Machine
  4. "API 15S" (PDF). 2019-02-14.
  5. Bert Dalmolen (2006). "Reinforced thermoplastic pipe: standardised composite solution for oilfield flowlines" (PDF). Petromin (October): 30–37. Archived from the original (– Scholar search) on 2007-10-08.
  6. Soluforce (2006). "Soluforce lays Sumatra pipeline in a jiffy" (PDF). PetroMin (December): 32–34. Archived from the original (– Scholar search) on 2007-10-08.
  7. K-M acquires reinforced pipe technology Archived 2005-02-05 at the Wayback Machine
  8. Kraus-Maffei (2005). "Hochdruckrohre wirtschaftlich fertigen" (PDF). Extrusion. 5: 24–27.
Bibliography
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