Fire on Storage Tank

A flash fire occurred at the ground level of two storage tanks containing marine slop oil. This resulted in a flashback which ignited one of the tanks and ruptured its tank top.
A worker who was working within the proximity of the tanks suffered serious burns and subsequently succumbed to his injuries.

Advisory Note- tips for safe storage of flammable chemicals(Please note that the advisory note is provided for the benefits of enhancing workplace safety and health, in no way the information is to be misconstrued as implying any liability on any party)

1. All storage tanks designed and constructed for containing flammable liquids shall conform to acceptable Singapore or International Standards.
2. Fixed storage tanks containing flammable liquid should be equipped with pressure-vacuum vents to allow for changes in pressure due to filling or withdrawal of product and to breathing of the tank due to atmospheric changes. This minimises vapour emission to the environment.
3. Floating roof tanks can be used for storage of flammable liquid to minimise product loss and fire and explosion hazards.
4. Storage tanks should be earthed. This helps prevent a static electrical discharge which might start a fire during filling or decanting.
5. No source of ignition (e.g. open flames, hot surfaces and sparks) shall be allowed at the storage area. Electrical installations and appliances in such area shall be of explosion-proof type.
6. Suitable fire fighting equipment or facilities shall be readily available to contain or mitigate any possible fire.
7. A risk assessment (RA) shall be conducted and safe work procedures (SWP) shall be developed for all work activities.
8. Workers shall be informed about the risk and hazards involved, and shall be trained in RA and SWP. They shall also be trained on and drilled in emergency response and spillage control.
9. Appropriate personal protective equipment (e.g. respirators, goggles, gloves and aprons) may be required to ensure the health and safety of workers working in such premises.

(Extracted from OSH Alert dated 25 June 2007)