Reinforced Thermoplastic Pipe(RTP)

1 - RTP Introduction

What's the Reinforced Thermoplastic Pipe?

Friday, 28 December 2012 at 09:30 GMT

RTP Multiple layer structureReinforced Thermoplastic Pipe (RTP) is now being extensively used in onshore oil &gas fields, mainly for gathering line and injection line systems. Since API has published a “Recommended practice” for these pipes (API RP 15S), the confidence of oil companies to actually use these products has risen significantly.Reinforced Thermoplastic Pipe (RTP) is now being extensively used in onshore oil &gas fields, mainly for gathering line and injection line systems. Since API has published a “Recommended practice” for these pipes (API RP 15S), the confidence of oil companies to actually use these products has risen significantly.                                                                                                     The unique combination of properties of RTP stems from its 3 layer construction:
1. A thermoplastic liner pipe (usually High Density Polyethylene, HDPE), to provide a leak free and corrosion resistant containment for the fluid
2. Cross wrapped layers of high strength synthetic fiber or high strength steel wire reinforcement to provide the required hydrostatic pressure resistance.
3. An HDPE cover layer, to protect the pipe from mechanical damage and UV-radiation.

2 - RTP Specifications

Typically, RTP is supplied in the diameter range of 3”-6” and a pressure rating up to 150 Bars (2200psi). Until recently, RTP was mainly used for onshore oil and gas production pipelines, like oil and gas gathering line, water injection lines, and water disposal pipelines. In remote areas most RTP is simply surface installed, without any special precautions to prepare its track. In more critical areas, RTP is usually trenched.
Thanks to the low cost of materials and installation, RTP is now increasingly being used for offshore operations. With some simple measures and precautions RTP has proven to be a very cost effective corrosion resistant alternative to expensive offshore flexible pipe and welded steel pipe.

RTP Specifications and Pressure grade Excel spreadsheet download here!

Color: white,yellow, black.

Piece length: Overall length of 150 or 200 meters in one roll.

Standred: API RP15S;

3 - Pipe Characteristics

The main technical advantages of RTP are:

  1. RTP is flexible and supplied on long-length coils, allowing a simple and very fast installation
  2. Corrosion resistance
  3. High pressure resistance
  4. Very high impact strength

4- RTP Properties

straub coupler

To use RTP offshore, the following properties are most relevant:

    • Hydrostatic strength, or the long-term resistance to internal pressure
    • Axial loading capability
    • Damage tolerance and impact resistance
    • Collapse resistance against potential external hydrostatic pressure
    • (Submerged)Weight

5 - RTP- Connection

 

RTP- heating connecting

RTP Fitting1

 

RTP- Fitting2

RTP fitting2

 

RTP- fitting

RTP fitting3