RTPIPE (Development of Simultaneous, Opposite, Continuous, Double Winding Technologies in Thermoplastic Composite Pipes)

Nowadays, with the development of reinforced thermoplastic pipes, steel and plastic pipes are gradually being replaced by new generation composite pipes.

Composite pipes are known as therm reinforced thermoplastic pipe R (RTP) or Thermoplastic Composite Pipe (TCP). These pipes consist of inner layer, reinforcement layer and outer layer. Materials such as Polyethylene (PE), Polypropylene (PP), Cross-linked polyethylene (PEX), Polyamide (PA), Polyphenylene sulfide (PPS), Polyvinylidene fluoride (PVDF) can be used in the inner and outer layers, while glass fiber, carbon fiber, aramid and materials such as kevlar.

Application of RTP pipes:

• Oil and gas collection and transmission lines;
• High pressure water transport lines;
• Offshore and onshore applications;
• Geothermal pipelines;

As can be seen from the comparison table below, RTP has superior features compared to its competitors.

In order for composite pipes to meet the same technical requirements in each section, the pipe section must be of the same structure. Since the reinforcing material is wound to the RTP pipes by helical winding, it is a must that the helical pitch be the same along the pipe so that the cross-sectional structure can be the same along the pipe. It is also important that the reinforcing material wound with the same pitch is homogeneously heated around the pipe and that the entire cross section is evenly bonded. These requirements make the production of reinforced thermoplastic pipes difficult. On the other hand, when the winding reinforcement material is finished, since the first end of the new material is adhered to the pipe surface by hand in existing systems, the cross-sectional structure is deteriorated and the continuity is interrupted.

Within the scope of the project, a production line was designed with the capacity of 90-800 mm diameter range and 10-200 Bar pressure resistance, the first prototype of the line was made and the first samples were produced with trial production. Samples with different dimensions and layer thickness were tested for performance.

Standards of the pipes to be produced with this technology are API 15S, ISO TS 18226, TSE K 166, TS EB 15874 and ASTM F2896-11, and the project outputs meet these standards.

This technology is protected under the name PCT / TR2015 / 050277 and System and Method for Continuous Strip Winding Onto Lateral Surface Of Longitudinal Objects.