COMPARISON OF FEATURES BETWEEN GRP AND HDPE PIPE S. No.
Description
1.
Tensile strength
2.
Modulus of Elasticity
3. 4. 5. 6.
Hoop tensile strength: 300 - 375 MPa Hoop Tensile modulus: 20000-30000 GPa
Specific gravity
1.8 – 1.9 Lesser wall thickness due to high strength and excellent stiffness and proper fiber orientation
Wall thickness Corrosion resistance
Relative Cost
7.
Process parameter for manufacturing
8.
Maintenance
9.
GRP Pipe 60 MPa 5000 GPa 0.95
For a particular pressure rating, wall thickness is much higher than GRP
Good
Good
15% cost saving higher diameter pipes (above 8 inches)
-
Varies from case to case and hence properties can be fixed depend upon the application by varying fiber orientation. GRP pipes are designed for 50 Year of life hence no maintenance is required
Underground piping applications
HDPE Pipe
Best design optimization possible between meeting internal pressure class and stiffness requirement with fiber orientation and sand aggregate addition
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Only one type for all applications
Periodical maintenance is required.
Uneconomical design calling for very high thickness.
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