H6-1 Bulk flammable gases (NCI 32)
H6-1 Bulk Flammable Gases (NCI 32)
Purpose
This document provides for:
safe and effective operations at incidents involving bulk flammable gases.
Requirements for Bulk Flammable Gases
Executive Officers’ responsibilities
Chief Fire Officers will issue a procedure for incidents involving bulk flammable gases.
Fire Region Managers will ensure that every Fire District in the Fire Region has a procedure in
accordance with this instruction.
Local procedures
When applicable, local procedures will take into account:
fires and leaks at flammable gas installations (including marine terminals)
fires and leaks involving flammable gases in transit (including shipping and major supply
pipelines)
the notification of appropriate authorities, including:
- local authority inspectors of dangerous goods
- hazardous substances and new organisms enforcement officers
- managers of any property or equipment involved
- gas suppliers
- police
- HSTLC members
- the Ambulance Service.
under the Official Information Act
Procedure for Bulk Flammable Gases
Operations
Consider the following actions:
approach from upwind where possible
establish and evacuate the inner cordon and other operational areas as required
Released
eliminate all sources of ignition in the inner cordon
identify the gas and its properties
monitor levels of flammability
notify air traffic control authorities to keep air space clear in the vicinity of large leaks
media statements.
NZFS Department of Operations and Training
Page 1 of 2
H6-1 Bulk flammable gases April 09.docx
H6-1 Bulk flammable gases (NCI 32)
Liaison
Liaise with site management to:
account for all NZFS personnel
help determine the size of the inner cordon
operate fixed protection systems
identify and manage further hazards
seek advice on the shutdown or control of leaks, systems or plant.
Cooling
Act
Gas tanks or pipe-work, that have been subjected to direct flame should be cooled at the rate of
32 l/s/m2 in the areas of flame impingement.
Preference should be given to the use of unmanned monitors or branches for such cooling.
Hazard Identification and Control: Bulk Flammable Gases
Hazard control
Information
All hazards will be controlled by eliminating, isolating where elimination is impracticable, or
minimising, using one or more of the control methods in the following table:
Hazards
Control measures
Firefighting
Official
Significant hazards:
all personnel will be trained in the conditions to be
encountered and the safe practices required when working at
BLEVE
the
incidents involving bulk flammable gases
explosion
pre-planning and risk assessment
brief crews on plan of action and safety measures
use only the minimum number of NZFS personnel needed to
conduct operations safely
establish an inner cordon with a radius of 500 m from the fire
under
cool tanks and pipe work, taking care not to freeze up relief
valves if cooling water is applied during operation
evacuate all unnecessary personnel, other service personnel
and members of the public from the inner cordon
wear structural firefighting uniform and BA
Gas leaks
Significant hazards:
As above, AND:
Released
ignition of gas
personnel will not enter gas cloud
cloud
establish inner cordon (consider wind direction)
cold burns
awareness of dangers of liquid leaks
NZFS Department of Operations and Training
Page 2 of 2
H6-1 Bulk flammable gases April 09.docx