GRP Pipes & Fittings

Name: GRP Pipes &amp; Fittings
SKU: 3564
Rating: 5.00 (2 reviews)

Fiber Glass Reinforced Plastic Pipe is a matrix or composite of glass fibre such as E-Glass fiber and ECR- Glass Fiber , polyester resin and fillers that the most common filler is fine silica sand . These pipes possess better strength durability high tensile strength low density and are virtually inert.

The glass fibers provide strength and stability, and the fillers contribute to high bending stiffness. With the glass fibers oriented in the desired direction, the fillers strategically placed, and all wetted out with resin and then cured at elevated temperatures, an exceptionally strong and stable laminate is formed.
G.R.P or Reinforced Plastic Mortar (RPM) pipes are widely used for transmitting damn and river waters , swages and when used FDA approved polyester resins then GRP pipes can be used for transmitting drinking water too . In case chlorine is added to water , then the polyester resin must be chlorendic resin that can withstand against chlorine corrosion . Diameter range is from 25mm to 4000 mm in diameter , and there are three well know methods to produce glass reinforced plastic pipes :

Centrifugal Casting
Continuous Filament Winding
Discontinuous Filament Winding

Fiber glass reinforced plastic pipes pressure range are from 1 BAR to 32 Bar that higher pressures also are possible with special arrangements and based on customer request . the other important point to classify the GRP pipes is STIFFNESS that pipes can be produces in 2500 to 10,000 P . normally for high pressure pipes filler will be removed and only resin and fiberglass will be used .

All fittings for GRP pipes including elbows, T, reducers , flanges are available based on customer request .

Parameter	Typical Specification / Description
Product Name	GRP Pipe
Material	Glass Fiber Reinforced Thermosetting Plastic
Reinforcement	Continuous E-glass or equivalent glass fiber
Resin Types	Polyester, Vinyl Ester, or Epoxy
Manufacturing Method	Filament Winding, Centrifugal Casting, or Lamination
Diameter Range	Commonly available from approximately DN50 to DN4000+
Pressure Class	Available in multiple pressure classes according to project requirements
Stiffness Class	Common classes include SN2500, SN5000, and SN10000
Internal Surface	Smooth resin-rich hydraulic surface
Operating Temperature	Typically suitable for moderate industrial and water-service temperatures
Jointing Systems	Couplings, flanges, restrained joints, and engineered connections
Applications	Water, wastewater, irrigation, desalination, chemical, industrial, and infrastructure piping

IF YOU ARE WILLING TO BUY GRP PIPES ROM IRANIAN SUPPLIERS, PLEASE SCROLL DOWN AND SUBMIT YOUR REQUEST.

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2 reviews for GRP Pipes & Fittings

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Kiera – June 16, 2026

Rated 5 out of 5
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Tonya – June 17, 2026

Rated 5 out of 5
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FAQ GRP Pipes & Fittings

GRP Pipe is a composite pipe manufactured from glass fiber reinforcement combined with a thermosetting resin such as polyester, vinyl ester, or epoxy, providing high strength, corrosion resistance, and low weight.

GRP Pipe is widely used for potable water transmission, wastewater and sewage systems, irrigation, desalination, industrial process water, cooling water, chemical services, mining, and other fluid transportation applications.

GRP Pipe offers excellent corrosion resistance, lower weight, a smooth internal surface, reduced maintenance requirements, and efficient transportation and installation, making it particularly suitable for aggressive or humid environments.

Commercial GRP pipes are available in different diameters, pressure classes, stiffness classes, wall constructions, resin systems, and connection configurations, including pressure, gravity-flow, sewer, irrigation, industrial, and chemical-service grades.

GRP Pipe is commonly produced by filament winding, centrifugal casting, or other controlled composite manufacturing processes in which glass fibers are combined with resin and cured to achieve the required mechanical and dimensional properties.

For finding suitable and reliable GRP Pipe suppliers and manufacturers in Iran, you can use Irancorps to identify and connect with Iranian suppliers according to your required specifications, application, quantity, and project requirements.