Please find below a series of questions and answers which you may find useful. Simply choose a topic from the list below:



What is GRP?
Glass-reinforced plastic (GRP), also known as glass fiber-reinforced plastic (GFRP), is a composite material made of a plastic matrix reinforced by fine fibers made of glass.
GRP is a lightweight, strong material with very many uses, including pipes, water tanks,
The plastic matrix may be epoxy, polyester, vinylester or thermoplastic.

Why GRP?
Fiberglass reinforced piping systems are time tested because they have proven their durability and value in stony environments and brutal applications for decades. Following factors lead GRP pipes ahead from any other pipe.
Long Life
It has a minimum life of 50 years. The smooth inside surface is maintained throughout the entire life of the pipe.
Cost effective
10%-15% cheaper than steel pipes & 20%-30% cheaper than pre-stressed cement concrete pipes.
Light Weight
GRP pipes weights only 25% as much as similar steel pipe and 10% as much as similar concrete product. GRP pipes are light weighted, hence easier handling, faster installation and low transportation costs. The use of heavy equipment is practically eliminated.
Installation Benefits
GRP pipes are easy to install due to its light weight. These can be manufactured upto 12m long to speed up installation and eliminates upto 75% of the joints compare to any other materials, hence handling & installation is easier then any other product. GRP pipes are light weight, and as such results in less expensive installation, labour and machinery expenditures.
Dimension Stability
GRP piping system can maintain the critical tolerances required of the most demanding structural and piping application. The materials need the most stringent material stiffness, dimensional tolerance.
Low thermal conductivity
Low thermal conductivity of GRP pipes not only causes low temperature losses but also in many cases eliminates condensation or the need for additional thermal insulation.
Corrosion Resistance
GRP Piping System are resistant to corrosion both inside & outside. These pipes has been used for handling dilute acids, saturated brine, organic solvents and other corrosive chemical but there is zero corrosion as result additional lining and exterior coating are not required.
Lower Pumping cost
The low friction factor results in lower pumping cost, thus saving huge energy cost during the life cycle of the pipe.
Lower Pumping cost
The low friction factor results in lower pumping cost, thus saving huge energy cost during the life cycle of the pipe.
Low Maintenance Cost
No maintenance cost throughout the life because of absence of corrosion, zero replacement.
Fire Resistance
GRP offers versatility in design and can be made fire resistant by proper selection of resin system.


Excellent Fatigue resistance
Under cyclic loading GRP provides very high resistance to fatigue which enhances its performance for longer life.

Is glass-fibre reinforced polyester detrimental to health?
No. The two substances are basic materials that form a composition of polyester reinforced with glass-fibre, the resin as ligate and the glass-fibre as reinforcement. With the resin (polyester), there is no risk of component migration. With the fibre glass, there is no problem either, since by its nature (composition) it is not detrimental to health. With respect to the minimum amount of fibre, it is not absorbed by the body, given a large amount of fibre.

Can GRP pipes be cut?
Yes, the simplest method is with a diamond disc or with a diamond wire.

 Can any type of grease be used to mount GRP pipes?
No. A vegetable based grease must always be used. Grease derived from petroleum is totally prohibited since it can damage the coupling's rubber gaskets.


credits: prospero