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10 Cards in this Set
- Front
- Back
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Physical configuration of tank farms is? |
Tanks, bunds and fire protection |
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Crude oil composition? |
LEL 0.6% UEL 15% Gravity 0.8 water 1 |
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Types of tanks? |
Spherical, fixed roof, floating roof |
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Bunds are? |
Walls surrounding flammable liquid tanks, designed to contain a spill should a leak occur They |
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Slop over is? |
Water is interspersed within crude oil and is heated to boiling pint and expands to steam, causing frothing of top layers of the product causing flow down the sides of tanks |
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Boil over is? |
Water at the bottom of the tank mixes with sludge and once the thermal layer reaches the bottom the water is vaporised and expands at a rate of 1700:1, causing a piston effect which force sunburnt product through the fire Occurs when the heat/thermal layer travels down and it reaches the bottom causing the water to vaporise and expand at a rate of 1700:1 |
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Important points? |
Protect exposures Avoid entering bunds Cool sides of tanks to maintain integrity Monitor progression of heat layer Do not apply water to fire Do not apply foam until sufficient concentrate is on scene Use aerial appliances and monitors Direct foam in vortexes Difficult to direct foam from ground Use installed systems Seek expert advice |
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Installed systems for boil and slop over include? |
Foam pourers and monitors |
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Dust explosions depends on? |
Type of dust Size of particles Presence of ignition Ventilation |
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Never use water on what dust? |
Metal |
