Introduction to FRP Piping

The complete form of FRP is fiberglass reinforced plastic, which is a composite material composed of a fiber-reinforced polymer matrix. Therefore, FRP pipes are made of FRP materials through contact molding or fiber winding. Various types of resins, such as thermosetting polyester, epoxy, phenolic resin, etc., are used to obtain the final product with specific FRP pipe properties. As a corrosion-resistant metal pipe substitute, FRP piping system has been widely used worldwide. By choosing FRP as the pipe material, the need for lining, external coating and cathodic protection can be easily eliminated.

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Application of fiberglass reinforced plastic pipe

 

Due to the high durability, corrosion resistance and medium strength of FRP pipes, its use is increasing day by day. FRP piping systems are used in different industries, such as:

'Drinking water and seawater desalination industry

'Chemical, petrochemical, oil and gas industries.

'Pipes and exhaust pipes

'Irrigation and sanitation services

'Water distribution and delivery

'Mud pipeline

'Power plants, etc.

 

Performance of FRP pipe

 

The main performance of FRP pipe is to make it an ideal choice for various industries in the world.

'Excellent corrosion resistance

'Excellent strength-to-weight ratio. It is worth noting that the strength-to-weight ratio of FRP pipes is higher than that of steel or other metal pipes.

'Light weight, easy to handle and transport.

'Dimensional stability

'Degradable

'Low friction coefficient (>25% better than steel), ensuring good flow characteristics.

'Good abrasion resistance

'Suitable for ground and underground pipelines

'Resistance to biological attacks such as bacteria

'Non-conductive

'Low maintenance cost

 

FRP pipe connection

 

Since the length of the FRP pipe is restricted by transportation and handling, it needs to be connected. At the same time, various FRP pipe fittings need to be connected as required. The connection system of the FRP pipe shall ensure that no leakage occurs under the predetermined use conditions under the working pressure.

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Additional reading:
How FRP Pipes Solve Common Plumbing Issues Today

FRP pipe fittings

Various FRP pipe fittings are available to meet the needs of pipeline layout. Common glass steel pipe parts are:

'Long radius, short radius FRP elbow

'Tee connection (equal tee and reducing tee)

'FRP pipe flange

'Steel back flange

'Flange elbow

'Smooth reducing elbow

'Special bending radius

'Horizontal connection

'Cross connect

'Wye Connection

'Reducer (eccentric and concentric)

'Flange reducing agent

 

FRP pipe specifications

 

When ordering FRP pipes, the following information must be provided to the supplier:

'Pipe diameter

'The design and working temperature of the applied fluid.

'Design, operation, surge, vacuum, test pressure.

'Live load of buried pipelines.

'Maximum/minimum buried depth and trench width.

'Details of soil properties and trench preparation.

 

Disadvantages of FRP pipes

 

The main disadvantage of FRP piping system is:

'It is not recommended to use FRP pipes to transport fluids whose temperature exceeds 100°C

'The use of pigments, dyes, UV stabilizers, fillers, etc. in the resin system can reduce the slight degradation of the resin by ultraviolet light.

Fiberglass reinforced pipes (FRP) are used in trenchless installation of pipelines because it is lightweight, temperature resistant, strong, and highly resistant to chemicals and corrosion. FRP basically consists of fiberglass and thermosetting resins. These pipes are easy to install and rarely need repair because they are low maintenance. In trenchless methods such as direct pipe, and microtunneling, FRP pipes are used because the jacking pressure required to drive the pipe is significantly reduced owing to its smooth outer surface.

Trenchlesspedia Explains Fiberglass Reinforced Pipe

FRP pipes are manufactured by a winding process that reinforces thermosetting epoxy resins with continuous glass filaments. As the resins cure they undergo an irreversible chemical reaction giving it superior resistance to temperature variation, while the glass fibers give it superior mechanical strength. In microtunneling steel sleeves were used for the purpose of jacking requiring tons of force. FRP pipes are now extensively used for this purpose because the reduced force to hydraulically jack it makes it cost effective also allowing for longer lengths to be installed. FRP can also be used for trenchless rehabilitation methods like sliplining. FRP is resistant to corrosion and chemicals and makes it an ideal material for pipes that carry such effluents.

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