What is GRP pipeline?
GRP (Glass fiber reinforced plastics) pipeline is a New composite materials, The pipe made of two or more different materials, the qualities of which combine to provide superior strength. GRP pipes consist of vinyl ester resins, or unsaturated polyester, glass fiber pieces and reinforcing agents. It is the best choice in Chemical industry, water supply and drainage projects and pipeline project, which have good Corrosion resistance, low water resistance characteristics,light eight, high strength, high transport flow, easy installation, short construction period and low comprehensive investment and other excellent performances.
FRP pipe is made process is filament winding , using quartz sand layer will strengthen, make its have sandwich structure, such as reducing the comprehensive cost of the pipeline, and improve the overall strength and stiffness of the pipeline.
How to produce GRP pipe?
FRP Pipe / GRP Pipes are manufactured by widely used helical filament winding method. FRP / GRP Pipes manufactured by filament winding method utilize continuous glass strand roving impregnated with polyester resin and helically wound on rotating mandrel at a specified winding angle. The winding process is continuous in bi-directional layers until the desired wall thickness is achieved. FRP / GRP pipes manufactured by filament winding offers better physical properties in comparison with other method so FRP / GRP Pipes manufactured with helical filament winding method will have longer services life without affecting the cost of supply.
9 classification of FRP pipeline
(1) FRP desulfurization pipeline
(2) FRP sand pipe
(3) FRP pressure pipe
(4) FRP cable protection tube
(5) FRP water pipeline
(6) FRP insulation pipe
(7) FRP ventilation duct
(8) FRP sewage pipeline
(9) FRP jacking pipe
What is the Difference between FRP and GRP?
FRP means fiber-reinforced plastics, it’s a term typically used stateside here in North America. GRP is a term that means the same thing. But it’s generally used over in Europe and Asia and stands for glass-reinforced plastic.
What is Fiber Reinforced Plastic?
Fiber-reinforced plastic is a composite material wherein a polymer is reinforced with fibers to enhance or add properties. These fibers are typically glass or carbon, although aramid, basalt, and even wood and paper have been used. Fiber reinforced plastics are commonly used in aerospace, automotive, marine, and construction industries because of their corrosion resistance and low weight-to-strength ratio.
3 main production process of GRP pipe
There are three main production processes for glass steel pipe: reciprocating winding process, continuous winding process and centrifugal casting process.
Connection way of GRP pipe
1.Single “O” connect (fit for middle and low pressure underground pipeline)
2.Double “O” connect (fit for high pressure underground pipeline)
3.Socket and adhesion (fit for high pressure and complex loads large diameters pipeline )
4.Butt-joint (fit for high & low pressure pipeline and pipe fittings)
5.Flange connect (fit for middle and low pressure pipe fittings, pipeline and equipment. Suitable for HG,JB,GB,ASTM,DIN,NF,JIS standard etc.)
Different Layer of GRP pipe
The wall structure of FRP pipes from the inside to the outside are: FRP lining, FRP secondary lining, FRP winding, FRP external protective layer.
The function of different layer are FRP lining, FRP secondary lining layer play the role of anti-corrosion and anti-seepage, the winding layer is responsible for the strength and rigidity of the pipeline, and the outer protective layer plays the role of anti-aging, anti-corrosion and anti-sun.
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