INVOLVED-Cylinder procedure

Question 1

Any steel cylinder that fails has the potential to project fragments up to ____?

Escaping gas - ignites - fireball of up to?

Answer 1

2oom

25m

Question 2

Following the confirmation of cylinders - priority message - then an informative stating?

All cylinders must be cooled to ambient temperature, acetylene OR unidentified cylinders must be cooled for___?

Answer 2

Number of cylinders
Type
Implementation of procedure
TM

1 hour!

Question 3

Use cylinder flow chart located___?

ROV?

Answer 3

In BA board - Aide memoir 6

Remotely operated vehicle - Request made via ILO

Question 4

Cylinders alight at the valve group may be funder off providing?

Cylinder defined as;

Answer 4

The cylinder IS alight at the valve group - where the hoses attach and NOT from around the neck of the valve where the valve enters the cylinder.

Any vessel containing a gas or liquid under pressure

Question 5

BCGA - CP

Cylinder heated - Steel weakens at:
Aluminium?

During a fire a composite cylinder may become?

Answer 5

British Compressed Gas Association - Competent Person

300c
200-250c

Porous

Question 6

Composite cylinders may be allowed to burn off

Acetylene can self heat after the shell has cooled off

IC should send an informative containing the highest temp recorded

Answer 6

Within 25m BA to be worn

IC should send an informative stating:

Actions taken
Number of evacuees
HZ size + road closures
The rap
TM

Question 7

If a acetylene cylinder fails the CAP, what happens?

The CAP consists of;

Answer 7

A further 1 hour cooling, followed by another CAP

Stop water after one hour
Monitor Cyl with TIC and record
Monitor Cyl for steaming
Leave cooling water turned off for 15 min
Apply momentary water spray 
4 times = 1 hour

Question 8

At this temp any water will violently react and boil off the surface of Cyl?

Answer 8

300c

The 200m HZ is only needed if the Cyl is in immediate danger of failing

Question 9

HMEPOs must maintain a log containing:

Cyl

Answer 9

Cyl location
Cooling timings
CAP - timings
Decisions during CAP

Question 10

BCGA have passed course in:

HMEPOs have been trained to id

British compressed gas association

Answer 10

Acetylene Cyl in fires

Manufacturer of Cyl - plus hazard zone management

Question 11

Composite Cyl mainly used for..?

IDing an acetylene Cyl:

Aluminium lined Cyl treated as steel

Answer 11

LPG

Painted maroon
No coloured shoulder
Paper label on collar!
Retro reflective tape on collars (recent)

Question 12

What four things should an incident commander try and determine to negate the necessity for a 200 metre cordon

What sort of cordon would then be put in place?

Answer 12

1. The fire has been extinguished
2. The cylinder is definitely not acetylene
3. All cylinders present have been located
4. The cylinders involved are receiving direct cooling.

A cordon around the incident sufficient to maintain a safe system of work

Question 13

Which cylinders fail at the lower temperature?

And how do they fail..?

Answer 13

Composite.. .. but will not fail catastrophically failure of these cylinders will lead to an intensification of the fire

Question 14

Can crews work in a hard zone?

Answer 14

Yes (following a RA by the IC), it’s not an exclusion zone

Question 15

What details should be included on an informative?

Answer 15

Actions taken
The no. of evacuees 
The HZ size and road closures
The RVP and approach route
The tactical mode

Question 16

When do you stop cooling a cylinder?

Answer 16

Once the fire has been extinguished and the cylinder been cooled to ambient temperature as assessed with a TIC & checked it’s not leaking.

Question 17

What must you do when handing a cylinder over?

Which form must you fill in?

Answer 17

Hand to owner/occupier who should be advised to contact the cylinder manufacturer using the competent person scheme

Form No 6104 - acetylene cylinder handover form

Question 18

How long does the CAP usually take and does the HZ need to be in place throughout?

How does decomposition take place within an acetylene cylinder?

Answer 18

Typically 2 hrs and yes

It has to be heated, mechanical shock alone will not do it. However, if decomposition was already taken place within an acetylene cylinder as a result of heating, then the cylinder will be more sensitive to mechanical shock and any disturbance could cause fresh acetylene to enter the affected area and feed the decomposition process.

Question 19

Acetylene alight at the valve group, usually due to what?

Most frequent type of this occurrence?

Answer 19

Valve either open or faulty

(With acetylene) - hoses are accidentally cut through by the operator

Question 20

Talk about decomposition in an acetylene cylinder

Answer 20

Decomposition can NOT be initiated in an unheated, undamaged acetylene cylinder by mechanical shock alone.

However, if decomposition was already taking place within an acetylene cylinder as a result of heating then the cylinder will be more sensitive to mechanical shock as any disturbance could cause fresh acetylene to enter the affected area and feed the decomposition process

Question 21

What is a leaking cylinder treated as?
What do you do?

If you can’t shut the cylinder down?

Answer 21

Haz Mat incident - shut it down if valve is undamaged, PPE to be worn as determined by the HMEPO or scientific advisor.

Monitor atmosphere for hazards, consider requesting RRT or FRU for DIM equipment.

Question 22

When evacuating what do you do with people who refuse to leave and those who are a certain distance away (how far..)from the incident?

Who do you pass the info to of people that refuse to leave?

Answer 22

100m - instructed temporarily to stay indoors away from doors or windows which are in direct line of the incident

Senior police officer at scene

Question 23

Describe what the CP (competent person) does at an incident?

Answer 23

Requested to attend protracted incidents
Offer advice to IC
Not their role to instruct the IC on the actions to be carried out
CP can assist in having cylinders collected

Question 24

Name the three layers of a composite cylinder

What temp does aluminium fail at?

Answer 24

Gas barrier layer
Composite layer
Outer protection layer

200-250*C

Question 25

Which is the only compressed gas to not have a coloured shoulder?

What colour are they (above)?

Most reliable way to id?

Answer 25

Acetylene

Maroon

Paper label attached to colour - or retro reflective tape or collars