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.
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
Power plants, etc.
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.
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
Low maintenance cost
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.
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
Smooth reducing elbow
Special bending radius
Reducer (eccentric and concentric)
Flange reducing agent
When ordering FRP pipes, the following information must be provided to the supplier:
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.
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.