Reinforced thermoplastic piping

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... 

Reinforced thermoplastics pipe can currently be made using E-glass fiber or carbon, aramid or polyethylene fiber reinforcement. The development of these new materials for high performance applications is still relatively recent compared with thermosetting resins and there are no long term case histories of product performance available yet. The pipes are made by... 

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. 

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... 

Spoolable composite-reinforced thermoplastic pipes are being tested per the requirements of ASTM D2837, while spoolable composite pipes with reinforced thermosetting resin layers are being tested per ASTM D2992. 

Lursen, H., 2001. Reinforced thermoplastic pipes — state of development, situation on the world market and system introduction in Germany. 3R International Special Plastic Pipes 40, 46-49. 

Lined carbon steel is the standard material of construction for primary pressure filter vessels. Typical linings are hard rubber, 3 or 6 mm thick, and glass-filled epoxy resins. Metallic internals tend to be Monel or titanium. Piping is FRP or a thermoplastic such as PVC wrapped with FRP for reinforcement. Internal piping, if not metal, may be of CPVC, properly supported. In larger sizes, support plates usually are of rubber-coated steel. 

Although composite forms of pipe may not have reached the same level of growth and widespread application as the commodity thermoplastic pipes, they have penetrated important market sectors and often attain a premium value. Composites can offer high performance for specific requirements. In the case of high pressure applications they are an alternative to steel pipe, especially where corrosion resistance and weight reduction are required. The chemical engineering construction industry with its need for conveyance of various fluids and applications in demanding environments, is a major consumer of composites, particularly fibre reinforced pressure pipes. 

Martin, T.A., Bhattacharyya, D. and Pipes, R.B. (1992) Deformation chciracter-istics and formabUity of fiber-reinforced thermoplastic sheets. Composites Manufact., 3, 165-172. 

Mallon, P.J., O Bradaigh, C.M. and Pipes, R.B. (1989) Polymeric diaphragm forming of continuous fibre reinforced thermoplastic matrix composites. Composites, 20, 48-56. 

O Bradaigh, C., Pipes, R. and Mallon, P. (1991), Issues in diaphragm forming of continuous fibre reinforced thermoplastic composites . Polymer Composites, 12, 246-256. 

D 1939 RESIDUAL STRESS BY GLACIAL ACETIC ACID IMRSN D 2105 LONGITUDINAL TENSILE OF REINFORCED PIPE D 2115 OVEN HEAT STABILITY OF PVC COMPOSITIONS D 2122 DIMENSIONS OF THERMOPLASTIC PIPE FITTINGS D 2124 PVC ANALYSIS BY FTIR... 

DESCRIPTION, CLASSIFICATION, AND TYPICAL USES Thermoplastic Pipe Reinforced Thermosetting Resin Pipe Resins Used for Piping Desirable Qualities of FRP Resins PROPERTIES Physical and Mechanical Flow Properties Chemical Resistance... 

Reinforced thermosetting plastic pipes are somewhat more sensitive to fatigue than thermoplastic pipes. Accordingly, they are often pressure-rated for surge service on the basis of their HDB as determined by Procedure A of the aforementioned ASTM D 2992 from test... 

Reinforced thermoplastic matrix pipes may be subjected to different types of loading conditions as well as different environmental conditions. However, they may suffer damage due to unexpected working conditions (low velocity impact, such as stones, tools, etc). This paper describes a methodology based upon fracture mechanics to evaluate possible pipe damages. It reports a set of tests made to characterize materials and pipes. Fracture Mechanics tests were made in samples subjected to low velocity impact. The study of damage evolution was done by using the ESPI (Electronic Speckle Pattern Interferometry) technique in order to determine the delamination area. 

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