The FRP/GRP pipe is consist of inner layer, Structural layer and
outer layer. Its characteristics are:
1. Light weight, high strength and high stiffness, its density is
1.5-1.9, equals one fifth of steel pipe, one fourth of cast steel
pipe and three fourth of pretensioned concrete pipe(PCP).
2. Corrosion-resistant property. The Corrosion-resistant property
of FRP pipe is mainly relied on the inner resin, and it can be
selected based on the condition of the media.
3. Good hydraulic property. The inner surface of the FRP pipe is
very smooth, its friction coefficient (f) is 0.000915 after
performed the relative testing, the water conservancy factor (c)
can be kept within 145 and 150 during a long period.
4. health property. For the pipe which be used for transporting the
potable water, the food grade resin will be used. It has been
approved by the relative national sanitary authority.
5. Shock resistance. It doesn’t occur delamination and cracking
under the condition of deformation of 25%. 6. Abrasive resistance.
The inner surface is made of one kind of resin with good abrasive
resistance, so it can improve the abrasive resistant property of
the FRP pipe.
7. Low temperature resistant property. There will not be cracking
under the condition of -40℃ and the strength doesn’t decline. 8. It
can be used for different kind of environment, such as beach,
benthal, river, mountain area, marshland, desert and plain etc.
As per different application, it’s be classified FRP motar pipe,
FRP process pipe, FRP jacking pipe, FRP insulation pipe, FRP FGD
pipe, FRP chimney etc. For diameter of underground pipes are
DN15-DN4000, and for aboveground pipes are upto 15m.
|Hoop tensile strength||118~304N/mm2|
|Axial tensile strength||85~160N/mm2|
|Hoop elastic modulus||14100~24500N/mm2|
|Axial elastic modulus||10700~12700N/mm2|
|Breakage elongation ratio (Min)||0.8%|
|Heat expansion coefficient||20×10-6 mm/mm.℃|
|Roughness coefficient of inner surface||0.0084|