FRP Pipe

FRP Pipe

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FRP Pipe

FRP Pipe Manufacturer & Supplier

Our Yongchang glass fiber reinforced plastic / FRP pipes are designed and manufactured according to customer requirements, with various sizes and configurations. We can manufacture pipelines of any specification and pressure, and can be made into composite pipelines such as PVC/FRP, PP/FRP, PVDF/FRP, etc. according to the conditions of use. Our designers can calculate the hoop stress, axial stress, and bending Poisson's ratio coefficient of the product according to your available space, chemical fluid requirements and applicable natural conditions, and then give the product selection, product thickness, and layering. Detailed manufacturing process parameters. All of our designed pipes meet industry standards, such as ASTM D2996-filament wound "glass fiber" (glass fiber reinforced thermosetting resin) pipe standard specification for filament wound pipe. According to user requirements, various standard fiberglass reinforced pipes and fiberglass fittings can be produced according to ISO 7370, ANSI/AWWA C950, AWWA M45, AWWA C590, ISO 10467, BS 5480, ASTM D2996, ASTM D2907.


What is the Difference Difference Between FRP and GRP Pipes

GRP pipes and FRP pipes (short for GRP and FRP) are used interchangeably in the glass fiber pipe industry. FRP stands for fiber reinforced plastic, a term commonly used in the United States of America. GRP is a noun with the same meaning. But it is widely used in Europe and Asia and represents fiberglass reinforced plastic.


FRP Pipe Detailed Introduction

Frp pipe, also called fiberglass reinforced pipe, is a light, high-strength, and corrosion-resistant non-metallic pipe. It is to wind the glass fiber with resin matrix on the rotating core mold layer by layer according to the process requirements. The fiberglass reinforced pipe wall structure is reasonable and advanced, which can give full play to the chemical resistance, light weight and high strength of the material. Under the premise of meeting the strength of use, it improves the rigidity and ensures the stability and reliability of the product. With its excellent chemical resistance, light weight, high strength, non-scaling, strong shock resistance, long service life compared with ordinary steel pipes and cast iron pipes, low overall cost, fast installation, safe and reliable, it is accepted by users. The application fields of fiberglass reinforced pipe involve industries such as petroleum, chemical industry, and sample water.

10 Types of Fiberglass Reinforced Pipe Commonly Used

(1) FRP desulfurization pipeline

FRP desulfurization pipeline

(2) FRP sand pipe

FRP sand pipe

(3) FRP pressure pipe

(4) FRP cable protection tube

FRP cable protection tube

(5) FRP water pipeline

(6) FRP insulation pipe

(7) FRP ventilation duct

FRP ventilation duct

(8) FRP sewage pipeline

(9) FRP pipe jacking

(10) FRP static conductive tube

FRP Pipe Performance and Characteristics

(1) Corrosion Resistance:

Most FRP pipe selection resins, glass fiber reinforced materials and composite structures are considered suitable for chemical applications to provide consistent corrosion resistance. There are still some extreme chemical services, special structures and alternative resins should be considered.

Chemically inert material, excellent corrosion resistance, and different corrosion-resistant pipelines can be selected according to the conveying medium. The conventional thickness of the corrosion-resistant layer is 5mm. The resin content is greater than 90%, which mainly plays the role of anti-corrosion and anti-leakage. The choice of resin is based on the use of different types of resin. Resistant to acid, alkali, salt, sea water, untreated sewage, corrosive soil or groundwater and many chemical fluids

(2) High Mechanical Strength and Strong Designability

The internal pressure resistance, external pressure resistance and impact resistance are all good, and pipes and fittings can be designed and manufactured according to the required pressure. The anti-corrosion layer can improve the use effect of FRP pipes under various conditions by adding wear-resistant materials, anti-static materials, and flame retardant materials.

According to the specific use situation, the specific performance and shape of the winding FRP pipe can be designed:

①The winding angle during winding can be designed so that the fiberglass steel pipe has different longitudinal/circular strength distribution;

②The wall thickness of the FRP pipe can be designed so that the FRP pipe can withstand different internal and external pressures;

③The materials can be designed to achieve different corrosion resistance, flame retardancy, dielectric purposes, etc.;

④The head-end method can be designed to adapt to different installation conditions to increase the speed of engineering installation.

(3) Strong Temperature Adaptability

Operating temperature range: greater than -70 degrees Celsius and less than 180 degrees Celsius, it can be used normally, and the pipeline will not crack under freezing media.

(4) Small Fluid Resistance

The inner surface of the FRP pipeline is very smooth, the roughness coefficient is small, and the water conservancy coefficient C can be kept in the range of 145-150 for a long time. The water friction loss coefficient f is 0.000915 after testing, which can significantly reduce the fluid pressure loss along the way and improve the transportation. Ability is above 20%. Reduce flow resistance, increase flow rate, and reduce energy consumption. Using smaller diameter pipes to transport fluids of the same flow rate can increase the flow rate by about 10% compared with steel pipes of the same specification; it does not scale and does not reduce the flow rate after long-term use. The protection of cables in the environment of interference and heavy corrosion has a good effect;

(5) Lightweight and High, Easy to Transport And Install (<20% of steel, 10% of concrete)

The specific gravity of frp pipe is 1.7-1.9. Compared with other material pipes of the same pressure and same diameter, the weight of FRP pipe is about 30% of that of steel pipe, so transportation and installation are very convenient. Each FRP pipe can reach 12m in length, and installation is quick and easy. In addition, it can eliminate the welding, rust prevention, and anticorrosion treatment required for the installation of steel pipes. The weight of the pipe is only 1/4 of the ductile iron pipe of the same specification and length, and 1/10 of the cement pipe. It is convenient to transport and unload, and is easy to install. FRP pipeline installation technology is mature, convenient and fast, reducing pipeline joints, accelerating installation speed, and improving the quality of the entire pipeline

(6) Maintain Water Quality

The material is non-toxic. The glass fiber reinforced plastic pipe is made of resin as the matrix and glass fiber as the reinforcing material through a special process to ensure that it is hygienic and non-toxic, the inner wall is smooth and does not accumulate, does not breed microorganisms, ensures the quality of the fluid, and does not affect water and other The medium produces secondary pollution and transports drinking water, which can maintain long-term water quality and sanitation. The water-conveying glass fiber reinforced plastic pipes are made of food-grade resin, and various testing indicators have reached international standards.

(7) Very Versatile and Good Weather Resistance

FRP pipes have good weather resistance and are suitable for harsh environments such as deserts and saline-alkali;

(8) Material Selection

Resin selection: base resin made of epoxy vinyl resin and phenolic vinyl resin. The fiber is non-alkali fiber or ECR fiber. Meet various anti-corrosion requirements.

(9) Life

The service life of FRP pipes can reach 50 years or more, which obviously reduces a lot of maintenance costs.

(10) Color

The exterior color of FRP pipes can be made into various colors according to user requirements. The exterior color can be changed by spraying gel coat resin to meet various use environments, and the exterior is neat, beautiful, and obvious in color.

Advantages of FRP Pipes

1. Excellent weight strength (stronger than steel on the basis of the same weight)

The excellent toughness of glass steel pipe makes it resistant to resin cracking and cracking when subjected to large design loads. In addition to high fatigue resistance, this toughness also provides a safety factor for impact damage during transportation and installation.

2. Low friction coefficient (more than 25% higher than steel)

Excellent dimensional stability

3. Low thermal conductivity (saving insulation costs)

Resist the influence of sunlight and other weathering elements. If it is a glass fiber tube, after years of weathering, the exterior can be polished and resin coated or painted under particularly harsh conditions.

4. Long-term maintenance costs are low

Disadvantages of FRP Pipes

1. The temperature resistance of FRP pipes is worse than that of steel pipes

The use temperature of the gas is less than 230 degrees. The use temperature of the liquid is less than 130 degrees. It can be used for a long time at -50 degrees under low temperature conditions.

2. The negative pressure resistance of FRP pipes is poor, and part of the negative pressure resistance can be compensated by adjusting the production process.

3. The corrosion resistance of FRP pipes is sensitive to some organic matter. The more sensitive media should be made into composite FRP pipes and FRP pipe fittings, such as: PVC\FRP, PP\FRP, PVDF\FRP. The strength of single material PVC, PP pipes and pipe fittings is much lower than that of FRP pipes. The composite production process can make up for each other's shortcomings.

FRP Pipe Application

Fiberglass reinforced pipe is widely used in various industries with its excellent product performance. And played an important role in various industries.

Petroleum, chemical, pharmaceutical, biogas industries: such as chlor-alkali, potassium sulfate fertilizers, papermaking, acid regeneration systems.

Water treatment industry: such as seawater desalination, industrial wastewater treatment output and input, and pure water systems.

Liquid transportation industry: urban water supply, urban drainage, irrigation system.

Power industry: flue gas flue, desulfurization system, circulating water, cable pipe, glass fiber reinforced plastic chimney.

Environmental protection: sewage odor recovery, workshop waste gas treatment, factory air purification, biogas desulfurization and purification.

FRP round pipes are used in petroleum, chemical, mining, metal production, power plants, flue gas desulfurization (FGD), pulp and paper mills, and drainage.

If you have any questions about the usage scenarios and fields of FRP pipes, you can contact us, and you will receive expert answers within 24 hours!

FRP Pipe Joint Method

Flat end docking

This type of joint is to align the end faces of the two pipes, and then wrap them with different sizes of reinforcement materials (glass cloth, felt or felt plus roving) impregnated with resin to an appropriate thickness and width. The thickness of the interface should be greater than the design thickness of the FRP pipe, and the width is the diameter of the FRP pipe. If conditions permit, the internal joints of the interface must be sealed and plugged. This kind of joint has good sealing performance and can withstand the design pressure of the interface FRP pipes. It is usually used to connect FRP straight pipes, FRP elbows, FRP tees and FRP tapered pipes, as well as other FRP fittings.

Flange connection

Flange connection is to connect the FRP flange to the FRP pipe, the two flanges are aligned, and the PTFE gasket or rubber gasket is clamped in the middle. The flange is fixed with bolts. The flange can also be a loose flange. This installation method is simple and has little impact on the construction environment. Easy to change accessories.

Socket connection

The sealing ring connection is divided into single 0-ring connection and double 0-ring connection. The first two methods are mostly used for fixed connections between pipelines and pipelines, while sealing ring connections are mostly used for connections between underground pipelines. The socket glue connection method is suitable for the connection of fixed-length pipes (but cannot be used for pipes with corrosion-resistant layers); pipes and pumps are connected because of vibration, and flexible joints are used to reduce the deformation of pipes and pipe fittings. FRP sand pipes are mostly connected by double O-rings. Pressure test holes are reserved between the two sealing rings at the pipe socket. When the pipe is installed, one should be installed and the other should be tested to ensure the joint No leakage.

FRP Pipe and FRP Accessories

FRP pipes can be used in conjunction with FRP flanges, FRP elbows, FRP tees, FRP deceleration pipes and various FRP accessories. Connect to form a complete set of FRP piping system. The products produced by the company have the characteristics of good pressure resistance, high strength, high rigidity, light weight, long life, corrosion resistance, non-toxic and odorless, and smooth inner surface. With their obvious advantages, they are widely replacing traditional materials. They are widely used in petroleum and chemical industries. , Medicine, food brewing and other fields, especially in municipal engineering water supply and drainage, sewage treatment, environmental sanitation, and tap water pipe network applications have shown great vitality.

FRP Pipe Connection Requirements

During interface operation, the ambient temperature should not be lower than 10℃; after bonding, the curing temperature should not be lower than 15℃, and the curing and holding time should not be less than 12 hours. Paste the interface according to the ply design. According to the sample data, planned gel time, environmental temperature, etc., mix the resin and stir it fully. When the bonding thickness is greater than 10mm, it should be molded in stages. Before each molding, the cured surface of the last molding should be polished.

Flexible Joints in FRP Piping System

After the FRP pipes are combined into a FRP pipe network, the system will vibrate when the system is running, and there are also changes in the thermal expansion and contraction of the FRP pipes due to environmental influences. Install flexible joints in areas where the FRP pipes are stressed to relieve the operating pressure of the system.

FRP fittings / FRP pipe fittings

FRP pipes are widely used in various environments and various systems. To form a strong FRP pipe network, a variety of FRP fittings are required, and FRP fittings are commonly used.

FRP fixed flange, FRP loop flange

FRP elbow

FRP tees with different diameters, FRP tees with the same diameter

FRP reducing pipe

FRP elbow (1D and 1.5D)

FRP flexible joint

Can be Customized for Various Applications

Yongchang provides long-term corrosion solutions and the absolute longest product life for standard fiberglass pipes, customized pipes, special manifold systems, pipes or chimneys. Contact us, you can get the advice of our professionals according to the usage scenario!


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