Reinforced Thermoplastic Pipes RTP

There is increasing interest in hose forms of construction as a route to manufacturing reinforced thermoplastic pipes (RTP) on a continuous production basis. The most widely used high pressure hoses are composite structures intended to create a flexible, tubular connection within high-pressure fluid systems. The pressure containment is achieved by incorporating textile fibres or steel wires which can carry high stresses whilst the elastomeric or plastic components essentially protect the fibre or wire structures and act as a seal against fluid permeation. 

The hoop strength of a helically braided hose is given by  

At present the use of RTP is being directed at applications associated with oilfields but other uses involving high water pressures such as deep wells or supply in mountainous regions involving high-pressure head can be envisaged. 

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Reinforced thermoplastic pipe (RTP) is a relatively new composite product. At present there are four suppliers with products ranging in diameter from 4 to 10 in. and with pressure ratings... 

Long Reinforced Thermoplastic Pipes (RTP), Pipeline International GmbH, Neudorf, Austria. Paper available from www.pipelife.com. 

Multilayer glass fiber, carbon fiber, aramid fiber, and steel-reinforced composite thermoplastic piping products have been in service for the past 20 years for oil and gas gathering pipelines and are now being introduced for oil and gas transmission pipelines. The reinforced thermoplastic piping (RTP), also referred to as spoolable composites or spoolable piping, consists of thermoplastic pipes or liners with exterior layer(s) of reinforcing materials. There are... 

All TP or TS matrix property can be improved or changed to meet varying requirements by using reinforcements. Typical thermoplastics used include TP polyesters, polyethylenes (PEs), nylons (polyamides/ PAs), polycarbonates (PCs), TP polyurethanes (PURs), acrylics (PMMAs), acetals (polyoxymethylenes/POMs), polypropylenes (PPs), acrylonitrile butadienes (ABSs), and fluorinated ethylene propylenes (FEPs). The thermoset plastics include TS polyesters (unsaturated polyesters), epoxies (EPs), TS polyurethanes (PURs), diallyl phthalates (DAPs), phenolics (phenol formaldehydes/PFs), silicones (Sis), and melamine formaldehydes (MFs). RTSs predominate for the high performance applications with RTFs fabricating more products. The RTPs continue to expand in the electronic, automotive, aircraft, underground pipe, appliance, camera, and many other products. 

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