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Safety Talk 4

Safe Operation of Storage Tanks: Major Tank FiresSafe Operation of Storage Tanks: Major Tank Fires

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Major tank fire

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Open top floating roof tank

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Sunken floating roof

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Dike / bund drain valves should be keptshut except when draining rainwater

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Open top floating roofs must bechecked after heavy rain

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Roof drain sump

Centre deck Sump cover

Check or non-return valve

SumpTo drain

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Partially blocked screen coveron roof drain

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Corrosion product / debriscollects in roof drain

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Grounding cable between weather shield anddeck. Are they maintained in good condition ?

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Damaged wheel on rolling ladder

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Anti-rotational pole –check condition and rollers

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Check vents and associated screens. Are they clear, free of debris and unrestricted ?

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Check conditionof fire fighting systems

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Test fire fightingsystems whentank taken outfor inspection

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Checklist (to be completed by technician)Cleanliness 1) Is there any debris, rags, bottles, rust scales etc on roof deck & seals ? YES / NO

2) Ponding of rain water on roof deck ? YES / NO

Leakage Sign of oil or holes on roof deck ? YES / NO

Roof Drains Clogging of roof drain screen mesh ? YES / NO

PV Vent Mesh Clogging of PV vent mesh ? YES / NO

Emergency Roof Drain Any clogging of emergency roof drain mesh ? YES / NO

Goose Neck Is there any visible defect ? YES / NO

Weather Shields / Seals 1) Is there any damage or corrosion ? YES / NO2) Excessive gaps between seal and shell YES / NO

Pontoon 1) Presence of water / oil inside pontoon compartments ? YES / NOCompartments 2) Are pontoon covers tightened down on their fastening lugs ? YES / NO

Earthing Cable Any damage on earthing cable connecting roof & Operator’s platform ? YES / NO

Guide Poles Any damage on guide poles rollers ? YES / NO

Rolling Walkway Any damage on wheels of rolling walkway ? YES / NO

Roof Drain Valves Have the roof drain valves been greased & exercised to ensure ease of movements ? YES / NO

Bottom of Shell Water ponding, corrosion, vegetation around bottom curb angle YES / NO

ANY OTHER OBSERVATIONS / REMARKS:

ACTION TAKEN (To be completed by Supervisor)

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Failed / buckled shell of tankdue to excessive internal corrosion