PN 376 Cylinder Procedure

Question 1

At what temperature do Steel and Aluminium cylinders lose their tensile strength?

Answer 1

300 degrees centigrade Steel.

200-250 degrees centigrade Aluminium.

Question 2

What is the initial hazard zone for a steel cylinder that has been substantially heated or is receiving direct flame impingement?

Answer 2

200m. This may be reduced when substantial cover is considered or on advice of HMEPO.

Question 3

Crews working within what distance of an involved cylinder should have full firefighting PPE donned including BA?

Answer 3

25m.

Question 4

What needs to be included in an informative message at a confirmed cylinder incident?

Answer 4

Highest recorded temperature, hazard zone size and tactical mode.

Question 5

As part of the CAP what is the minimum initial cooling period for an acetylene cylinder?

Answer 5

1 hour.

Question 6

What is procedure for a cylinder alight at valve grouping but grouping still usable?

What may be needed to turn off valve group.

Answer 6

Commit crew with full PPE, BA and 45mm jet to assess damage. If feasible extinguish flame and close cylinder.

If acetylene then a cylinder key may be required. Some new cylinders may have a hand wheel or other similar method.

Question 7

What is the CAP? Describe it.

Answer 7

Cylinder Assessment Process.

Cool for one hour