RTP vs Steel & GRP Pipe

RTP Engineering Guide

RTP vs Steel & GRP Pipe

RTP is not automatically better than steel or GRP. The right choice depends on pressure, temperature, fluid, route, installation method, external loads, qualification requirements and whole-life cost. This guide sets out where each pipe family fits and what must be checked before selection.

RTP pipe connectors used for jointing and comparison with other pipe systems
RTPSpoolable thermoplastic composite pipe; lightweight, corrosion-resistant and suited to long continuous lengths.
SteelWidely codified, high strength and temperature capability; corrosion protection and joint count need attention.
GRP / FRPRigid thermoset composite pipe; often used for larger diameter and corrosive service where rigid construction suits the route.
No universal winnerThe selected system must satisfy the project specification, installation constraints and whole-life cost.

Comparison by selection criterion

Criterion RTP Steel GRP / FRP
Weight Low; easier handling and transport in coils High; lifting and support are significant Lower than steel but rigid and usually jointed in sections
Corrosion resistance Thermoplastic liner and jacket resist many corrosive media Requires coating, lining or material selection Generally good, but resin/liner compatibility must be confirmed
Flexibility Spoolable; follows routes with fewer joints, subject to bend radius Rigid; bends and fittings required Rigid; route and support design required
Joint count Long coils reduce field joints; end connections remain critical Many joints in long routes unless welded Joints depend on pipe system and installation method
Temperature Limited by liner, reinforcement and jacket; project-specific Can cover high-temperature duties with suitable grade Resin-dependent; verify service temperature
Pressure Depends on reinforcement schedule and design qualification High pressure capability with established codes Design-specific; pressure class and joint system must match
External damage Jacket protects reinforcement; rocky ground and third-party interference need assessment Robust but corrosion coating can be damaged Good compressive strength but impact and point loading need care
Installation speed Fast where long coils and suitable equipment are available Depending on welding, coating and heavy lifting Depending on jointing, curing and support works
Repair / reuse Can be recoiled and reused in suitable applications; repair method must be qualified Repair by welding or clamps; reuse is limited Repair is system-specific; reuse is limited
Qualification Pipe, fitting and installation system need project-specific qualification Mature codes and standards available Mature standards for many applications; joint and liner details matter

When RTP is a strong candidate

Corrosive fluidsWhere a suitable thermoplastic liner avoids corrosion and scaling problems.
Long, route-constrained linesCoiled pipe can reduce joints and installation time where access is difficult.
Temporary or relocatable linesWhere the pipe may be recoiled, moved or reused under a qualified procedure.
Weight-sensitive projectsWhere lifting, transport or support costs are a major driver.
Water and hydrocarbon serviceWhen the liner, reinforcement and fittings are qualified for the fluid and pressure.
Remote locationsWhere reduced jointing and fast deployment lower site labour and logistics.

When another pipe family may be better

Steel may be preferred

Very high temperature, fire exposure, heavy external loads, high surge pressure or projects governed by established steel codes may favor steel. Corrosion protection and joint design still need to be addressed.

GRP / FRP may be preferred

Large-diameter rigid systems, severe external loads, certain chemical duties or projects already standardized on GRP may favor GRP/FRP. Jointing, curing and support requirements differ from RTP.

RTP may not fit

If the fluid attacks the liner, the temperature exceeds the qualified range, the bend radius cannot be respected or a qualified fitting/installation system is unavailable, RTP may not be suitable.

This page is a selection guide, not a design approval. Final material selection, pressure rating, fittings, installation and testing must follow the project specification and qualified product data.

Compare the system, not just the pipe

Send the pressure, temperature, fluid, route and installation constraints. BENK can help define the RTP production scope and the points that need qualification.

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