Cylinder Procedure

Question 1

What is a cylinder

Answer 1

Any vessel containing a gas or liquid under pressure

Question 2

How may commercial gases be commonly found, stored and transported.

Answer 2

Compressed.
Liquified.
Dissolved.
Refrigerated.

Question 3

What is the boiling point and how is it effected by higher pressures

Answer 3

The point at which liquid evaporates. It’s higher with higher pressures.

Question 4

What is the critical temperature.

Answer 4

The temperature that a gas cannot be liquefied using pressure alone.

Question 5

What is the critical pressure.

Answer 5

The pressure needed to liquify a gas at its critical temperature.

Question 6

What will happen to a cylinder if it is directly involved in fire and reaches its critical temperature.

Answer 6

Explode.

Question 7

List the particulars of Acetylene and how it is stored (5)

Answer 7

Maroon cylinder.
Lighter than air.
Garlic odour.
Usually dissolved in acetone to increase stability.
The gas is usually split into pockets within the cylinder in a honeycomb like construction to increase stability.

Question 8

What are the different types of cylinder construction. (5)

Answer 8

Welded Cylinder.
Drawn Steel.
Aluminium Cylinder.
Composite Cylinder.
Composite Cylinder - Aluminium Lined.

Question 9

Possible cylinder contents (6)

Answer 9

Flammable.
Oxidizing gas.
Toxic.
Corrosive.
Asphyxiant.
Cryogenic.

Question 10

What can cause a cylinder to fail.

Answer 10

Over pressurisation - BLEVE
heating - loss of strength in casing.
Resin in composite cylinder breaking down.

Question 11

What will happen to a composite cylinder involved in a fire.

Answer 11

Will fail at a lower temperature but will not fail catastrophically.

Question 12

What is the minimum hazard zone

Answer 12

200m