The Specification of FRP Water Tanks

Panel Material Characteristics
DESCRIPTION GRP
Specific Gravity 1.8
Glass content More than 30%
Tensile strength 1,020kgf/cm²  (9.996KN/cm²)
Young’s modulus 1.40x105 kgf/cm²   (13.7Gpa)
Flexural strength 1,650 kgf/cm²  (16.17 KN/ cm²)
Impact strength 52.5 kgf/cm²   (0.515KN/ cm²)
Compressive strength 3,010 kgf/cm²  (29.50 KN/ cm²)
Shear strength 960 kgf/cm²  (9.41 KN/ cm²)
Thermal expansion 2.16x10-5/ºC
Thermal conductivity (single panel)
(insulated panel)
0.15 Kcal/m hrºC  (630 J/ m hrºC)
0.02 Kcal/m hrºC  (84 J/ m hrºC)
Coef. of overall heat transmission
(single panel)     
(insulated panel)
5.0 Kcal/m hrºC  (21 KJ/ m hrºC)
1.0 Kcal/m hrºC  (42 KJ/ m hrºC)
Water absorption Less than 0.2%
Cavity Less than 2%
Light transmittance (grey panels) 0.00%

 

Design Conditions
Depth of Tank (m) Panel Strength kgf/cm² (Kpa) Hydrostatic Pressure kgf/cm² (Kpa)
1.0 More than 0.6 (59) 0.07 (6.9)
1.5 1.0 (98) 0.12 (12)
2.0 1.3 (130) 0.16 (16)
2.5 1.7 (170) 0.21 (21)
3.0 2.1 (210) 0.26 (25)
3.5 2.5 (250) 0.31 (30)
4.0 2.9 (280) 0.36 (35)

 

TECHNICAL DATA PARAMETERS
Wind Velocity 60m/sec
Snow Load 60 kgf/ m²
Man Load 120 kgf
Seismic load:
Horizontal Seismic coefficient Kh= 0.3
Water temperature 40ºC **
Anchor Bolts shall be used to tie down a tank.
Notes:
Panel strength is the actual “bursting” pressure.
**Sample panel exposed to 80% humidity and 80o C for a period of one month, remained unaffected.

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