LPG

Question 1

What is Boil Over?

Answer 1

Boil Over: Thermal layer travels down, reaches water and heats up, causing piston like explosion.

Question 2

What is Slop Over?

Answer 2

Slop Over: Frothing of top layers of product which then flows down side of the tank into bunded area.

Question 3

In relation to LPG, What is the :
a) UN Number
b) HazChem code
c) Dangerous Goods Class
d) Names

Answer 3

a) UN Number - 1075
b) HazChem code -2YE
c) Dangerous Goods Class - 2.1
d) Names - LPG, LPG Gas, Propane 50% Butane 50% mix

Question 4

In relation to LPG, What is the :
a) Expansion Ratio
b) Flammability limits
c) Vapor Density
d) Specific Gravity

Answer 4

Expansion Ratio 270:1 (1L vaporizes to 270L)
- Flammability limits (LEL 2% - UEL 10%)
- Vapor Density 1.5 (air =1) will sink
- Specific Gravity 0.5 (water =1) on top of water surface

Question 5

What must vehicles that have LPG tanks display on their number plates?

Answer 5

Must display red diamond on front and rear number plate if vehicle is powered by
LPG. (Petrol & LPG car)
- 2 red diamonds required for a dedicated LPG powered vehicle