Tanker Explosion

III. Environmental Factors

The explosion occurred at around 11:00AM in the morning beside a gasoline station. Average ambient temperature may be 28-35 deg C and surely it can be classified as well ventilated area.

IV. Human Factor

As there are not data on this, we will analyze it using the data from MSDS with regards to handling and transfer of diesel.

For purposes of this analysis, let us define some terms (Source: IEC 60079):

ambient temperature
temperature of the air or other media, in the immediate vicinity of the equipment or component
lower explosive limit (LEL)
concentration of flammable gas, vapour or mist in air below which an explosive gas atmosphere will not be formed
upper explosive limit (UEL)
concentration of flammable gas, vapour or mist in air, above which an explosive gas atmosphere will not be formed
flashpoint
lowest liquid temperature at which, under certain standardized conditions, a liquid gives off vapours in a quantity such as to be capable of forming an ignitable vapour/air mixture
ignition temperature of an explosive gas atmosphere
lowest temperature of a heated surface which, under specified conditions will ignite a flammable substance in the form of a gas or vapour mixture with air
auto-ignition temperature (AIT)
lowest temperature (of a hot surface) at which under specified test conditions an ignition of a flammable gas or vapour in mixture with air or air/inert gas occurs

About the Author

Ver Pangonilo
A Filipino Engineer, Registered Professional Engineer of Queensland (RPEQ) - Australia and Professional Electrical Engineer (PEE) - Philippines with extensive experience in concept select, front-end engineering, HV & LV detail design, construction and commissioning of Hazardous and Non-Hazardous Area electrical installations in water and waste water pipeline and pumping facilities, offshore platforms, hydrocarbon process plants and pipelines including related facilities. Hazardous area classification and design certification (UEENEEM015B, UEENEEM016B, UEENEEM017B).
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