GRP Piping System

AvisaParseh Manufacturing and  Industries

Brief Pipe Specification and Technical Data

  • Product Range
Diameter Range300-3000 mm
Pressure Ratingup to 32 bar (depending on pipe diameter)
Stiffness Classup to 10000 Pa
Standard Length 12 meter
  • Installation

AvisaParseh GRP pipe can be installed in a number of different situations including above ground, sub- aqueous, trenchless  and  sloped  applications. These applications often require more initial planning and more design considerations than the standard buried pipe installation. Specific instructions have been developed and could be provided when needed.

  • Flow Velocity

Maximum recommended flow velocity is 3.0m/sec. Velocities of up to 9m/sec. can be used if the water is clean and contains no abrasive material.

  • UV Resistance

There is no evidence to suggest that ultraviolet degradation is a factor that affects the long-term service life of GRP pipe. The outermost surface will be affected with discoloring of the surface which has no effect on the mechanical properties of the pipe.

  • Possion’S Ration

Poisson’s ratio is influenced by the pipe construction. For AvisaParseh pipe, the ratio for hoop (circumferential) loads and axial response ranges from 0.22 to 0.29. For axial loading and circumferential response Poisson’s ratio will be slightly less.

  • Operating Temperature

Maximum allowable temperature for GRP pipes produced using unsaturated polyester resin is 45 C. However, Avisaparseh Resin Manufacturing division has designed specially formulated resins which  under certain operating condition could withstand tempeatures up to 160 C.

  • Load Capacity Values
  • Thermal Coefficient of Expansion

The thermal coefficient of axial expansion and contraction for GRP pipe is 21 to 28x 10-6 cm/cm/C which in longitudenal direction is almost 2 times larger than that of steel pipe.


  • Flow coefficient

Based on long term tests carried out In Faratech Technology Center, for Avisaparseh GRP pipes, the Colebrook-White coefficient may be taken as 0.029mm. This corresponds to a Hazen Williams flow coefficient of approximately C=150 and Mannining flow coefficient of n=0.009

  • Abrasion Resistance

Abrasion resistance can be related to the effects that sand or other similar material may have on the interior surface of the pipe.  GRP pipe has been evaluated by using the Darmstadt Rocker method. The average abrasion loss of GRP pipe is 0.34mm at 100,000 cycles. Results will depend on the type of abrasive material used in the test. 

  • Hydrotest

Get more information on GRP Pipe  products, Technical and Specifications, Transportation, Installation and More 

Learn More About  International Standards, Test Methods, Best Practices and Specifications Applicable to GRP Piping Systems

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