Transportation of liquefiable petroleum gas
AssigneeAfrican Oxygen Limited
InventorsGraham Christopher Pye, Donegal Harold Victor Carroll
Life of this patent
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Abstract
A pressure vessel for transportation of liquefiable petroleum gas (LPG) is cylindrical with a circular cross-sectional profile. The wall thickness of the vessel (in meters) multiplied by a design strength of the material from which the vessel is made (in megapascals) is less than 0.8 times the internal diameter of the vessel (in meters). The design strength is the yield strength divided by 1.5 or the tensile strength divided by 2.5. The wall thickness is between 3 mm and 11 mm. The diameter is between 1 and 2.6 m. The vessel have have an external insulating and fire resistant cladding. It may also have a cooling plant for cooling the LPG.
Claims15
A transportable pressure vessel assembly for housing liquefiable petroleum gas, which comprises a pressure vessel that is generally cylindrical, having a circular cross-sectional profile;
- and
- a temperature control means operatively associated with the pressure vessel, the pressure vessel being dimensioned such that a value (R) expressed by
- R
- =
- (
- e
- ×
- f
- D
- )
- ×
- 10
- is smaller than approximately 8 megapascals, wherein
- e is a thickness of a cylindrical wall of the pressure vessel, in meters;
- f is a design strength of a material from which the pressure vessel is made, in megapascals;
- and
- D is an internal diameter of the pressure vessel, in meters.
Dependencies are inferred from the claim text.