GRP high-pressure pipe made in China

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Description of GRP high-pressure pipe

GRP or FRP pipework is manufactured in accordance with BS 7159, with structural, chemical and thermal properties being dictated by the type of resin selected by Plastichem specialists.
GRE pipe systems with filiament wound construction provide higher mechanical strength with lower cost.

The most common resin type specified is a Vinylester Epoxy which has excellent chemical resistance to a broad range of chemicals. 
Plastichem design experts can offer stress analysis on all GRP pipework. Stresses are reduced where necessary by increasing laminate thicknesses, increasing leg lengths and adjusting support distances and clamp positions.
The internal corrosion barrier can be varied to suit the application and abrasion resistant GRP linings are also available for flue gas slurry handling. 
Manufacture of the pipe is by mandrell winding of chopped strand glass fibre or by filament winding. Elbow and tee fittings are moulded and then joined to the pipe where required.

One of the benefits of this system is that sections can be pre-fabricated in the factory and then site joined. This method minimises site work and elliminates flanged joint connections. 
GRP piping can be coloured externally for line identification, UV and fire resistant properties can be enhanced with additional resin coats.


Main Features of GRP high-pressure pipe

light weight and high strength, anti-ageing, aesthetically pleasing appearance, environmental friendliness


Specifications of  GRP high-pressure pipe


 Pressure:PN35-250 bar  

 Standard length:9m-12m,

 Execute standard:SY/T6267-1996, API 15HR/15LR 

Applications of GRP high-pressure pipe

1.Chemical medium transportation pipe
2.Various producing process pipe (chemical process, paper making process, polluted water treatment process, sea water purifying process, food and drink producing process, and medicine producing process)
3.Pressure pipe for small hydroelectric power station on the ground and cycling pipe for power plant
4.Polluted water collecting and transporting pipe
5.Drink water transporting main line and tubing pipe
6.Oil field water injecting pipe and oil transporting pipe
7.Heat transporting pipe and sea water transporting pipe
8.Agricultural irrigation pipe
9.FRP set (ventilation, air-conditioner, chimney, cleaner) and piping
10.Gas drainage pipe for mine 

IMages of GRP high-pressure pipe


GRP high-pressure pipe made in China

GRP high-pressure pipe made in China

GRP high-pressure pipe made in China



1, How to choose the pipe materials of GRP?

Generally speaking, the choice of RPMP should consider the groundsill and soil of RPMP. When the design of pipeline has the full reconnaissance design, geology situation, and hydrology situation, we should choose according to the AWWA-C950 standard. For the using factories, they can supply such data to the manufacturer, and the manufacturer can carry out the design and produce the qualified pipe materials according to the buyers’ demand.


2, The notice of ordering to the GRP pipes?

General booker should define the following questions including using condition:

1). The structure length of the fixed length RPMP is 1.2m. However, in the real lay project, the spigot and socket joint is adopted, the pipe’s using quantity should be calculated by the pipe’s effective length. Generally speaking, the effective length of 1.2m fixed length pipe: 300-DN1200 is 11.74m, DN1300-DN1500 is 11.679m and DN1600-DN2600 is 11.613m.

Eg: if we lay the straight pipe section for length 1000m, the quantity of fixed length pipe with effective length 11.74 is 1000m÷11.74m/piece≈85pieces.

2). In order to meet the buyer’s demand, manufacture can produce the unfixed length pipe. Generally speaking, RPMP can produce various pipes of any length (≤12m). But it must consult the manufacturer’s suggestions. Generally speaking, the manufacturer can supply the unfixed length pipes with 3m, 4m, 5m, 6m, 8m, and 12m.


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Q:The difference between FRP process tubes and GRP tubes
Pure glass fiber reinforced plastic pipe relative to sand pipe prices higher, in addition, the two types of pipe applications in general have obvious differences, process tubes are used in chemical plants and other places, sand pipes are used in municipal.
Q:What are the standards for FRP pipes?
To install FRP pipes, first check the radial deflection of the GRP pipe. In accordance with the requirements of the specification, the FRP pipe shall be tested within 24 hours after the completion of the installation to test whether the initial radial deflection of the pipe installed is deformed and whether the pipe has occurred in the case of bulge, flat and other mutations.
Q:What kind of diamond saw blade for cut glass steel pipe?
Glass fiber reinforced plastic pipe is also called glass fiber winding sand pipe (RPM pipe). Mainly to the glass fiber and its products as reinforcing material, polymer composition of unsaturated polyester resin, epoxy resin as basic material, quartz sand and calcium carbonate and other inorganic non-metallic particles as filler materials as the main raw material. The standard effective length of the tube is 6m and 12M, and the production methods include fixed length winding process, centrifugal casting process and continuous winding process of three kinds. Classification can be carried out according to the product process method, pressure grade PN and stiffness grade SN.
Q:Excuse me, what standard does the glass fiber that check mechanical and electrical use accord with GB?
The pipe wall structure reasonable and advanced, can give full play to the role of material, to meet the premise of use strength, improve the rigidity, ensure the stability and reliability of the product. Because of its excellent chemical resistance, light weight, high strength, no scaling and strong seismic resistance, the glass steel sand inclusion has the advantages of long service life, low overall cost, quick installation, safety and reliability compared with ordinary steel tubes.
Q:What are the differences between FRP pipes and sand pipes in their uses?
Pressure more than 10 kg, generally do not clamp sand tube. Process tubes are mainly used in highly corrosive workplaces such as acids, alkalis, salt solutions, or high pressure pipes.
Q:What are the specifications of glass fibre reinforced plastic cable pipes? What are they?
FRP cable pipe is a new type of composite material, it formed with resin as matrix and glass fiber reinforced composite materials, and unsaturated resin bonded molding and high quality cable protection is matched with the modern cable engineering construction with catheter products. Strong pressure resistance, light weight, smooth inner wall and small friction coefficient. It is easy to use the cable and does not damage the cable. Moving and transporting are easier and more convenient than metal pipe and concrete pipe. Construction and installation are simple and convenient and save labour.
Q:Why more and more people choose FRP pipe?
And the price ratio of FRP pipe is not much cheaper, and although the hardness of concrete pipe although FRP pipe to be hard, but the toughness and tensile strength is poor, the pressure is not good, and the cost is expensive, because more and more people use glass steel, and the price is expensive, with longer life.
Q:Characteristics of FRP pipes
(1) corrosion resistance: chemically inert material, excellent corrosion resistance, and can choose different corrosion resistant pipes according to the transmission medium.(2) strong mechanical strength: good water pressure resistance, good resistance to external pressure and impact strength, and piping and fittings can be designed according to the required pressure.(3) temperature adaptability: the use of temperature range: greater than -70 degrees Celsius, less than 250 degrees Celsius, under the freezing medium, the pipe is not split.(4) the resistance of the fluid is small: the pipe wall is smooth, the roughness coefficient is 0.0084, and the pipe diameter can be reduced under the same flow rate.(5) light weight, long life: light quality, convenient transportation, low construction cost, no maintenance, and the service life of more than 50 years.(6) maintain the water quality: non-toxic, conveying drinking water, can maintain long-term water quality sanitation. The application of FRP: the drinking water distribution pipe and line pipe conveying
Q:How to improve the compressive strength of waste glass fiber reinforced plastic profiles (such as square tubes) should be started with resin, curing agent, glass fiber or other aspects!
Ensure the solidification of glass steel products in a reasonable range, in general, glass fibre reinforced epoxy resin material curing degree if the use of amine curing agent, the best curing degree in the range of 135 degrees --150 degrees, polyester resin, Mohs hardness of about 60 is OK.
Q:What is the stiffness of FRP pipe?
Stiffness, also called ring stiffness, is a numerical indicator of actual resistance to external pressure. Ring stiffness S definition: S =EI /D 3 (where E is the elastic modulus of the material, I is the moment of inertia, D is the average diameter of the pipe ring), and the ring stiffness is KN/m2.

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