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Tank ?
The tank size is determined considering conditions of a site and economical efficiency. If the factor of site is not considered, a smaller diameter will reduce the investment cost (materials and engineering). For storage of liquid contents in bulk except high pressure gases and volatile matters, CRT (Cone Roof Tank) is generally used. The details are described in the following table. The types of roof are divided into the fixed roof type and the open top type in general, and the fixed type can be divided into the self support roof and the supported roof. Corrosion of the bottom plate is the biggest problem for a tank. Finishing such as oil sanding is required to prevent corrosion which is caused by rain water intruding through the gap between the bottom plate and the foundation.

Considerations for Design
Kinds and Physical Properties (Specific Gravity, Volatility and Corrosiveness) of Contents
Capacity (Nominal, Gross and Working Storage) and Size (Diameter x Height) of Tank
Area if Site, Maintenance Space, Piping and Other Facilities, Future Plan for Further Facilities
Relevant Regulations for Distance between Tanks and Required Area of Dike
Static & Variable Load, Wind Load & Seismic Load

Types and Features
Kinds Types Applicable Conditions Volatility of Stored
Contents
Low Medium High
Remarks
CRT Cone Roof Tank
 - Most General Type
- Internal Pressure :-50¡­+100 mmH2O
- Small Scaled Tank: Up to 250 mmH2O
(Refer Appendix F for to API 650 )
O ¡â X
- Self Support Roof Type:
: Diameter ¡Â 16m (Standard)
- Support Roof Type:
: Diameter £¾16m (Standard)
DRT Dome Roof Tank
 - For cases CRT is not available
- Max. Internal Pressure: 1,000 mmH2O
- Small Scaled Tank: Up to 3,000 mmH2O
O O X
- More expensive than CRT
in General
FRT
Floating Roof Tank
 - For cases of small Vapor Loss
- Mixture with a little amount of rain water is allowed.
O O X
- Single Deck, Double Decks
- Cautions for installation on snowing area
CFT Covered Float Tank
 - For cases of small Vapor Loss
- Mixture with a little amount of rain water is not allowed.
- Suitable for Cold Area and Snowing Area
O O X
- Safe from rain, wind and snow
¡Ø Storage for High-Pressure Gas and Liquefied Gas: Spherical Tank (SPT), Double Wall Tank (DWT)
¡Ø ¡Û: Optimum, ¡â: Suitable, ¡¿: Not Suitable

SPECIFICATION
Model Size Capat
(§©)		 Bottom Shell Roof Rafter ±âŸ
(kg)		 Total
Weight
(kg)
Dia. (m) Shell (m) t (mm) w (kg) T (mm) W (kg) T (mm) W (kg) Size Weight
(kg)
HSSO-5 1.5 3.0 5 5 90 5 571 5 92 100x50x5 29 75 829
HSSO-10 1.9 3.0 10 5 144 5 723 5 153 100x50x5 37 102 1,122
HSSO-30 2.5 4.0 30 6 299 5 1,331 5 264 100x50x5 48 189 1,084
HSSO-50 3.8 4.5 50 6 689 5 2,167 5 610 100x50x5 110 347 3,813
HSSO-80 4.5 6.0 100 6 697 5 3,421 5 855 125x65x6 249 524 5,767
HSSO-100 5.4 6.0 150 6 1,391 6 5,488 5 1,231 125x65x6 448 811 8,921
HSSO-150 7.0 5.5 200 6 2,366 6 5,835 5 2,068 125x65x6 484 1,024 11,263
HSSO-200 7.0 8.0 300 6 2,336 6 8,478 5 2,068 150x75x8 806 1,288 14,171