Fiberglass pipe and fittings

Fiberglass pipes and components are a very good alternative to metal equipment inadvanced industries because of their unique properties, such as excellent corrosion resistance as well as high strength bonding, for use in chemical and aggressive weather conditions. The pipes made by this technology are more economical compared to corrosion resistant steel pipes and are more robust compared to thermoplastic tubes (polyethylene, PVC, etc.). This technology generally uses fibers as reinforcements and resins as matrices.

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to corrosion in alkali, acid and electrochemical environments

Low weight

about a quarter of steel and one tenth of concrete

smooth Internal surface

higher flow rate of fluid inside the pipe and reducing
the required energy

Extremely high pressure bearing

Electrical and thermal insulation

ideal for saving energy

Minimum life time of 50 years

Low cost

of transportation, installation and maintenance

Resistant to sunlight


The application of fiberglass pipes and fittings are in the fields of energy, especially the oil, gas and petrochemical industries, chemical products, water and sewage, power plants, melting of metals, sea and offshore industries, have been found abundantly and Among these, the following can be mentioned:

  • Water and wastewater collection and transmission lines
  • Pipelines for the collection and transmission of crude oil and gas
  • Firefighting pipelines
  • Industrial water and wastewater pipelines
  • Desalination systems
  • Seawater transmission pipelines
  • Cooling water systems
  • Irrigation and drainage systems
  • Fiberglass poles for transmission lines
  • All transfer pipelines inside ships and berths
  • Chemical and corrosive transport pipelines

Based on type of fiber and resin, these materials are classified as:


Tubes and parts made from carbon fiber and thermoset resin


Tubes and parts made from glass fiber and epoxy resin


 Tubes and parts made from glass fiber and vinyl ester resin


 Tubes and parts made from glass fiber and polyester resin

Comparison of fluid pressure drop at a speed of 1 to 2 m/s inside the tube

The time required to connect the pipelines to each other

Comparison of raw material costs and installation in various tubes in the oil industry – regardless of cost of cathodic protection

Compare costs of steel tubes and GRE


D 3262 Standard Specification for ‘Fiberglass’ (Glass-Fiber-Reinforced Thermosetting-Resin) Sewer Pipe

D 3517 Standard Specification for ‘Fiberglass’ (Glass-Fiber-Reinforced Thermosetting-Resin) Pressure Pipe

D 3754 Standard Specification for ‘Fiberglass’ (Glass-Fiber-Reinforced Thermosetting-Resin) Sewer and Industrial Pressure Pipe

D 4024 Standard Specification for Machine Made ‘Fiberglass’ (Glass-Fiber-Reinforced Thermosetting-Resin) Flanges

D 4161 Standard Specification for ‘Fiberglass’ (Glass-Fiber-Reinforced Thermosetting-Resin) Pipe Joints Using Flexible Elastomeric Seals


15 LR Specification for Low Pressure Fiberglass Line Pipe

15 HR Specification for High Pressure Fiberglass Line Pipe

15 AR Specification for Fiberglass Tubing


14692 Petroleum and Natural Gas Industries-Glass Reinforced Plastics (GRP) piping


M 45 Fiberglass pipe design

C 950 specification for fiber glass pressure pipe


EN 705 Plastics piping systems – Glass-reinforced thermosetting plastics (GRP) pipes and fittings – Methods for regression analyses and their use 2501 flange dimensions and drilling


IPS–E–PI–221/1 APPENDIX J Requirements for Glass Fiber Reinforced pipe and fittings


10729 Plastics- “Fiberglass” (Glass Reinforced Thermosetting Resin “GRP”) Pressure Pipes Applicable in Water Supply Systems- Specifications and Test Methods

10730 Plastics- “Fiberglass” (Glass Reinforced Thermosetting Resin “GRP”) Non-Pressure Pipes Applicable in Gravity Sewerage Systems-Specifications and Test Methods

11433 Plastics- “Fiberglass” (Glass Reinforced Thermosetting Resin “GRP”) Pressure Pipes Applicable in Sewerage and industrial piping Systems-Specifications and Test Methods

Pooyesh composite yekta company has the ability to produce all kinds of fiberglass pipe and fittings with diameter from 25 to 1000mm with different pressures and stiffness.
Also, various types of fiberglass parts with specific engineering and precision can be produced according to customer’s order. The services offered by this company are at all levels of engineering range from design and installation to extensive after sales services and calculations.

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