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AS 1851.12-1995 Maintenance of fire protection equipment - Gaseous fire

extinguishing systems

Licensed to LUU MINH LUAN on 25 Feb 2002

AS 1851.12—1995

Australian Standard 

Maintenance of fire protection equipment

Part 12: Gaseous fire extinguishing systems

12 December 1994 and published on 5 March 1995.

The following interests are represented on Committee FP/11:

Australian Chamber of Commerce and Industry Australian Construction Service—Department of the Arts and Administrative Services

Australian Fire Authorities Council Australian Fire Protection Association Commonwealth Fire Board

Defence Department, Australia Fire Protection Industry Association of Australia Fire Trainers Association of Australia

Insurance Council of Australia New Zealand Fire Equipment Association New Zealand Fire Protection Industry Contractors Association Railways of Australia

Society of Fire Protection Engineers Australasian Chapter Telecom Australia

Review of Australian Standards To keep abreast of progress in industry, Australian Standards are subject

to periodic review and are kept up to date by the issue of amendments or new editi ons as necessary It is important therefore that Standards users ensure that they are in possession of the latest edit ion, and any amendments thereto.

Full details of all Australi an Standards and related publications will be found in the Standards Australia Catalogue of Publications; this information is supplemented each month by the magazine ‘The Australi an Standard’, which subscribing members receive, and which gives details of new publications, new editi ons and amendments, and of withdrawn Standards.

Suggesti ons for improvements to Australian Standards, addressed to the head off ice of Standards Australia, are welcomed Noti fi cati on of any inaccuracy or ambiguity found in an Australian Standard should be made without delay in order that the matter may be investigated and appropriate action taken.

This Standard was issued in draft form for comment as DR 93173.

AS 1851.12—1995

Australian Standard 

Maintenance of fire protection equipment

Part 12: Gaseous fire extinguishing systems

First publi shed as AS 1851.12—1995.

PUBLISHED BY STANDARDS AUSTRALIA (STANDARDS ASSOCIATION OF AUSTRALIA)

1 THE CRESCENT, HOMEBUSH, NSW 2140

ISBN 0 7262 9563 9

This Standard was prepared by the Joint Standards Australia/Standards New Zealand Committee FP/11 on Fire Extinguishing Systems as an Australian Standard to provide suitable requirements for the regular maintenance of gaseous systems

The objective of this Standard is to provide users of gaseous fire extinguishing systems with the necessary requirements needed in the regular maintenance of such systems

Gaseous systems may contain control and indicating equipment (CIE) that complies with

AS 1603.4, Automatic fire detection and alarm systems, Part 4: Control and indicating

equipment, and is installed in accordance with AS 1670, Automatic fire detection and alarm systems — System design, installation, and commissioning The maintenance provisions of this

Standard therefore overlap those for control and indicating equipment contained in

AS 1851.8, Maintenance of fire protection equipment , Part 8: Automatic fire detection and

alarm systems Where the CIE for a system forms part of a fire indicator panel (FIP) serving

other zones as well as the protected enclosure, then maintenance is in accordance with

AS 1851.8 and this Standard can be undertaken simultaneously without the need for duplication

This Standard has some variance in text from its sister document, AS 1851.8, due to the change in the document style procedures of Standards Australia

The term ‘informative’ has been used in this Standard to define the application of the appendix to which it applies An ‘informative’ appendix is only for information and guidance

 Copyri ght STANDARDS AUSTRALIA Users of Standards are reminded that copyri ght subsists in all Standards Austr alia publi cati ons and software Except where the Copyri ght Act all ows and except where provided for below no publications or software produced by Standards Australi a may be reproduced, stored in a retr ieval system in any form or transmitt ed by any means without prior permission in writ ing from Standards Australi a Permission may be conditi onal on an appropriate royalt y payment Requests for permission and information on commercial soft ware royalti es should be dir ected to the head off ice of Standards Australi a.

Standards Austr alia will permit up to 10 percent of the technical content pages of a Standard to be copied for use exclusively in-house by purchasers of the Standard wit hout payment of a royalty or advice to Standards Austr alia.

Standards Austr alia wil l also permit the inclusion of its copyright material in computer soft ware programs for no royalt y payment provided such programs are used exclusively in-house by the creators of the programs.

Care should be taken to ensure that materi al used is from the current editi on of the Standard and that it is updated whenever the Standard is amended or revised The number and date of the Standard should therefore be clearly identif ied.

The use of materi al in print form or in computer software programs to be used commercially, with or without payment, or in commercial contracts is subject to the payment of a royalty This policy may be vari ed by Standards Austr alia at any ti me.

3 AS 1851.12— 1995

CONTENTS

Page

SECTION 1 SCOPE AND GENERAL

1.1 SCOPE 4

1.2 REFERENCED DOCUMENTS 4

1.3 DEFINITIONS 4

SECTION 2 GENERAL REQUIREMENTS 2.1 MAINTENANCE OF INSTALLATION 5

2.2 RECORDS 5

2.3 PRECAUTIONS 5

SECTION 3 MAINTENANCE PROCEDURES 3.1 WEEKLY 6

3.2 MONTHLY 6

3.3 SIX-MONTHLY 7

3.4 YEARLY 7

SECTION 4 MAINTENANCE DOCUMENTATION 4.1 GENERAL 10

4.2 RECORD SYSTEM 10

APPENDIX A SYSTEM— LOGBOOK REPORT 11

STANDARDS AUSTRALIA

Australian Standard Maintenance of fire protection equipment

Part 12: Gaseous fire extinguishing systems

S E C T I O N 1 S C O P E A N D G E N E R A L

1.1 SCOPE This Standard sets out requirements for the regular maintenance of gaseous fire extinguishing systems, designed and installed in accordance with the appropriate installation Standard Regular maintenance includes inspection and testing procedures The ‘gas’ shall be referred to as the ‘extinguishant’ in this Standard

1.2 REFERENCED DOCUMENTS The following documents are referred to in this Standard:

AS

1210 Unfired Pressure Vessels (known as the SAA Unfired Pressure Vessels Code)

1603 Automatic fire detection and alarm systems

1603.4 Part 4: Control and indicating equipment

1670 Automatic fire detection and alarm systems — System design, installation, and

commissioning

1851 Maintenance of fire protection equipment

1851.8 Part 8: Automatic fire detection and alarm systems

2030 The approval, filling, inspection, testing and maintenance of cylinders for the storage

and transport of compressed gases (known as the SAA Gas Cylinder Code) 2030.1 Part 1: Cylinders for compressed gases other than acetylene

2484 Fire— Glossary of terms

2484.2 Part 2: Fire protection and firefighting equipment

4214 Gaseous fire extinguishing systems

4214.1 Part 1: General requirements

1.3 DEFINITIONS For the purpose of this Standard, the definitions given in AS 1603.4,

AS 1670, AS 2484.2, AS 4214.1 and the Standard appropriate to the extinguishant used apply

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5 AS 1851.12—1995

S E C T I O N 2 G E N E R A L R E Q U I R E M E N T S

2.1 MAINTENANCE OF INSTALLATION It is essential that regular maintenance of gaseous systems is undertaken to ensure an operational condition and to prevent leakage or inadvertent discharge

Calibrated test equipment and recognized procedures shall be used

Regular maintenance is classified into four levels which shall be performed as follows:

(a) Weekly, only where the appropriate authority deems it necessary

(b) Monthly on all systems

(c) Six-monthly on all systems that do not incorporate means to determine container contents

(d) Yearly on all systems

NOTES:

1 Maintenance should be carried out only by persons having qualifications and experience suitable for the particular work in which they are engaged

2 The manufacturer may have additional requirements beyond that specified in this Standard

3 The arrangements for maintenance should ensure that a person is available on call at all times

to provide service in the event of any fault developing at the installation

2.2 RECORDS All system attendances, e.g inspection, testing, service and maintenance procedures, shall be systematically recorded by date with signed entries in the logbook maintained on the site (see Clause 4.2) In addition, a copy of all attendance records should

be forwarded to the owner or the owner’s agent The property owner or occupier shall maintain a record of maintenance carried out on the gaseous systems The maintenance record system shall contain the classification (weekly, monthly, six-monthly or yearly) and date of maintenance, any defects and any consequent remedial action or advice given by the service person, with any additional action or advice by the service person

The maintenance record system shall be available for the property at all times

NOTE: The maintenance record system may be in the form of a logbook or a computer-based record system, or other appropriate permanent record system

2.3 PRECAUTIONS Prior to commencing any inspection, testing or maintenance procedures, the service person shall carry out the following precautionary procedures as applicable:

(a) Inform the building owner or agent that maintenance is to be carried out

(b) Advise the fire control station, where testing will transmit a fire alarm signal

(c) Where fitted, close lock-off valve and in addition ensure that all extinguishant actuating circuits are isolated or firing mechanisms are removed to ensure that testing or that other maintenance procedures cannot cause discharge of any extinguishant

(d) Set the detection and alarm system in the appropriate test mode and ensure that ancillary facilities, systems and air-handling plant (including smoke exhaust and stairwell pressurization systems, evacuation warning systems, and the like), where they are not to be tested, are isolated to avoid inadvertent operation

(e) On completion of any inspection, testing or maintenance procedure, the service person shall ensure that all controls are returned to the normal condition and re-establish the systems integrity

NOTE: The action to be taken when any function is isolated should be covered by the maintenance contract The following is recommended: When any section of an installation is to be isolated, the owner or agent should be notified and in turn should advise the appropriate authority

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S E C T I O N 3 M A I N T E N A N C E P R O C E D U R E S

3.1 WEEKLY Where required, the weekly maintenance procedure shall be performed as follows:

(a) Isolate extinguishant supply and ancillaries in accordance with Clause 2.3

(b) Check the proper operation of all associated visual alarm indicators by initiating a simulated fire alarm on an alarm zone facility

The above test shall be carried out in a manner acceptable to the fire control station (c) Check the satisfactory operation of the fire alarm bell

(d) Reset alarm zone facility

(e) On completion of testing, to re-establish the system’s integrity, ensure that all switches are in the correct operating position Inform the building owner or agent of any items requiring corrective action

(f) Record the results of weekly maintenance procedures in the log, including whether the fire alarm signal from the alarm zone facility was received at the fire control station (see Clause 4.2)

3.2 MONTHLY The monthly maintenance procedure shall be performed as follows: (a) Isolate extinguishant supply and ancillaries in accordance with Clause 2.3

(b) Initiate a simulated fire alarm on an alarm zone facility so as to transmit an alarm to the fire control station Check the proper operation of all associated visual alarm indicators Check that the alarm was correctly received at the fire control station The above test shall be carried out in a manner acceptable to the fire control station (c) Check the satisfactory operation of the fire alarm bell

(d) Reset alarm zone facility to normal

(e) Test each alarm zone facility to confirm its ability to operate the master alarm facility (f) Check that all visual and audible indicators are operating correctly

(g) Check that all control and indicating equipment is in a clean and operational condition, and effectively dust sealed

(h) Ensure that all fire indicator panels, extinguishant local control stations (LCS), repeater panels and mimic panels are clearly visible and readily accessible (see AS 1670) (i) Simulate fault conditions on all alarm zones to ensure that fault indicators, both audible and visual, where applicable, are operating correctly from each alarm zone facility (j) Check the battery condition by operating the battery test facility for 1 min, and record the battery condition in the log

(k) Inspect all extinguishant containers, manual mechanical release mechanisms and all other ancillary equipment to ensure they are secure, undamaged and unobstructed (l) Where applicable, check and record the container gauge pressures Any container showing a loss in pressure exceeding 10% of the nominal filling pressure, adjusted for temperature change from initial fill at the applicable reference temperature, shall be reported to the owner or agent for corrective action

(m) Check the function of all extinguishant manual initiate switches and the extinguishant inhibit switch on each LCS

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7 AS 1851.12—1995

(n) Ensure that all discharge nozzles are not obstructed and are correctly aligned Carry out

a visual inspection on all exposed pipework, support and mechanical controls

(o) Ensure that all warning and instruction signs, as required, are correctly displayed and unobstructed and that all controls, valves, switches, and the like, are properly identified

(p) On completion of testing, to re-establish the system’s integrity, ensure that all controls are returned to the normal condition

(q) Record the results of monthly maintenance procedures in the log, including all items requiring corrective action, adjustment and the like (see Clause 4.2)

(r) Check that items previously recorded as requiring attention have been attended to, or record the reasons why corrective actions have not been completed

(s) Inform the building owner or agent that maintenance is completed and of any items requiring corrective action Obtain all necessary signatures in the log

3.3 SIX-MONTHLY The six-monthly maintenance procedure shall be performed as follows:

(a) Isolate extinguishant supply and ancillaries in accordance with Clause 2.3

(b) Check and record the amount of extinguishant in each container by weight or liquid level

NOTE: Pressures and liquid levels in extinguishant container can vary considerably with temperature change There may be a considerable time delay between changes in ambient temperature and the corresponding changes in the extinguishant container pressure or level Any liquid level measurement should be referenced to a datum, established at a known temperature (c) Perform monthly maintenance procedures in accordance with Clause 3.2, Items (b) to (s), inclusive

3.4 YEARLY The yearly maintenance procedure shall be performed as follows:

NOTE: Prior to yearly maintenance procedures, the maintenance provider should give the owner

or agent sufficient notice of testing to allow time for witnessing to be arranged

(a) Isolate extinguishant supply and ancillaries in accordance with Clause 2.3

(b) Perform monthly maintenance procedures in accordance with Clause 3.2, Items (b)

to (o), inclusive

(c) Inspect all detectors and sampling points for any condition which is likely to adversely affect their operation, such as deposition of dust or coating of paint

(d) Remove at least one detector on each alarm zone circuit and confirm that the fault signal is registered at the appropriate alarm zone facility

(e) Determine the sensitivity of all detectors This may take the form of either —

(i) the testing of a detector in situ; or (ii) the removal of a detector and its replacement by a detector which has been

checked and calibrated by the supplier

NOTE: For details of detector testers, see AS 1851.8

(f) Check that an alarm on each detector registers on the correct alarm zone facility

NOTE: This may require the owner or agent to provide other personnel to reset or restart ancillary facilities

(g) Measure and record the time delay between any detector circuit’s initiation of extinguishant release and receipt of the operation signal at the actuators

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