Fixed firefighting systems. Gas extinguishing systems. Design, installation and maintenance

EN 15004-1:2008
en: Fixed firefighting systems - Gas extinguishing systems - Part 1: Design,installation and maintenance (ISO 14520-1:2006, modified) uk:

EUROPEAN STANDARD

NORME EUROPEENNE

EUROPAISCHE NORM

ICS 13.220.20
English Version
Fixed firefighting systems - Gas extinguishing systems - Part 1:Design, installation and maintenance (ISO 14520-1:2006,modified)
This European Standard was approved by CEN on 26 April 2008.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN Management Centre or to any CEN member.
This European Standard exists In three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

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Contents Page
Foreword 6
Introduction 9
1 Scope 11
2 Normative references 11
3 Terms and definitions 13
4 Use and limitations 16
4.1 General 16
4.2 Extinguishants 16
4.3 Electrostatic discharge 17
4.4 Compatibility with other extinguishants 17
4.5 Temperature limitations 17
5 Safety 17
5.1 Hazard to personnel 17
5.2 Safety precautions 18
5.2.1 General 18
5.2.2 For normally unoccupied areas 18
5.2.3 For unoccupiable areas 19
5.3 Occupiable areas 19
5.4 Electrical hazards 20
5.5 Electrical earthing 20
5.6 Electrostatic discharge 20
6 System design 20
6.1 General 20
6.2 Extinguishant supply 21
6.2.1 Quantity 21
6.2.2 Quality 21
6.2.3 Container arrangement 21
6.2.4 Storage containers 21
6.3 Distribution 22
6.3.1 General 22
6.3.2 Piping 23
6.3.3 Fittings 23
6.3.4 Pipe and valve supports 24
6.3.5 Valves 25
6.3.6 Nozzles 25
6.3.7 Pressure reducing orifice assembly 26
6.4 Detection, actuation and control systems 26
6.4.1 General 26
6.4.2 Automatic detection 26
6.4.3 Operating devices 27
6.4.4 Control equipment 27
6.4.5 Operating alarms and indicators 28
6.4.6 Stop devices 28
7 Extinguishant 28
7.1 General 28
7.2 Specifications, plans and approvals 28
7.2.1 Specifications 28
7.2.2 Working documents 28
7.3 System flow calculations 29
7.3.1 General 29
7.3.2 Balanced and unbalanced system 29
7.3.3 Friction losses 29
7.3.4 Pressure drop 29
7.3.5 Valves and fittings 29
7.3.6 Piping length 30
7.3.7 Drawings 30
7.3.8 Liquefied gases - Specific requirements 30
7.4 Enclosures 31
7.5 Extinguishant concentration requirements 32
7.5.1 Flame extinguishment 32
7.6 Total flooding quantity 33
7.6.1 General 33
7.6.2 Liquefied gases 33
7.6.3 Non-liquefied gas 34
7.7 Altitude adjustment 34
7.8 Duration of protection 35
7.9 System performance 35
7.9.1 Discharge time 35
7.9.2 Extended discharge 36
8 Commissioning and acceptance 36
8.1 General 36
8.2 Tests 36
8.2.1 General 36
8.2.2 Enclosure check 36
8.2.3 Review of mechanical components 36
8.2.4 Review of enclosure integrity 37
8.2.5 Review of electrical components 37
8.2.6 Preliminary functional tests 38
8.2.7 System functional operational test 39
8.2.8 Remote monitoring operations (if applicable) 39
8.2.9 Control panel primary power source 39
8.2.10 Completion of functional tests 39
8.3 Completion certificate and documentation 39
9 Inspection, maintenance, testing and training 40
9.1 General 40
9.2 Inspection 40
9.2.1 General 40
9.2.2 Container 40
9.2.3 Hose 40
9.2.4 Enclosures 41
9.3 Maintenance 41
9.3.1 General 41
9.3.2 User's programme of inspection 41
9.3.3 Service schedule 41
9.4 Training 42
Annex A (normative) Working documents 43
A.1 General 43
A.2 Working documents 43
A.3 Specific details 44
A.3.1 Pre-engineered systems 44
A.3.2 Engineered systems 44
Annex В? (normative) Determination of flame-extinguishing concentration of gaseous extinguishants by the cup burner method 45
B.1 General 45
B.2 Principle 45
B.3 Requirements for apparatus 45
B.3.1 General 45
B.3.2 Cup 46
B.3.3 Chimney 46
B.3.4 Diffuser 47
B.3.5 Fuel supply 47
B.3.6 Manifold 47
B.3.7 Air supply 47
B.3.8 Extinguishant supply 47
B.3.9 Delivery system 47
B.4 Requirements for materials 47
B.4.1 Air 47
B.4.2 Fuel 47
B.4.3 Extinguishant 47
B.5 Procedure for flammable liquids 48
B.6 Procedure for flammable gases 48
B.7 Extinguishant extinguishing concentration 49
B.7.1 Preferred method 49
B.7.2 Alternative method 49
B.8 Reporting of results 50
Annex C (normative) Fire extinguishment/area coverage fire test procedure for engineered and pre-engineered extinguishing units 51
C.1 Requirements 51
C.2 Type of test 51
C.3 Extinguishing system 52
C.4 Extinguishing concentration 53
C.5 Nozzle distribution verification tests 53
C.5.1 Nozzles minimum height/maximum area coverage test 53
C.5.2 Nozzles maximum height test 58
C.6 Extinguishing concentration tests 59
C.6.1 Wood crib test 59
C.6.2 Heptane pan test 64
C.6.3 Polymeric sheet fire test 65
Annex D (normative) Method of evaluating inerting concentration of a fire extinguishant 71
D.1 General 71
D.2 Principle 71
D.3 Apparatus 71
D.4 Procedure 71
D.5 Inerting concentration 72
Annex E (normative) Door fan test for determination of minimum hold time 73
E.1 General 73
E.2 Test for determination of predicted hold time 73
E.2.1 Principle 73
E.2.2 Apparatus 74
E.2.3 Calibration and accuracy of apparatus 74
E.2.4 Preliminary preparation 74
E.2.5 Evaluation of enclosure 75
E.2.6 Measurement of enclosure 75
E.2.7 Test procedure 76
E.2.8 Calculation 79
E.3 Treatment of enclosures with predicted hold times less than the recommended value 87
E.3.1 General 87
E.3.2 Leakage areas 87
E.3.3 Improved sealing of the enclosure 87
E.3.4 Quantification and location of leaks 87
E.4 Report 88
Annex F (informative) System performance verification 90
Annex G (informative) Safe personnel exposure guidelines 91
G.1 General 91
G.2 Safety 91
G.3 Hazards to Personnel 91
G.3.1 Agent itself 91
G.3.2 Noise 91
G.3.3 Turbulence 91
G.3.4 Low temperature 91
G.4 Halocarbon agents 92
G.4.1 Toxicity of halocarbons (liquefied gases) 92
G.4.2 PBPK Model 93
G.4.3 Safe exposure guidelines for halocarbons 94
G.5 Inert Gas (non-liquefied gas) 96
G.5.1 Physiological effects of inert gas agents 96
G.5.2 Safe exposure guidelines for inert gas agents 96
Annex H (informative) Flow calculation implementation method and flow calculation verification and testing for approvals 98
H.1 General 98
H.2 Calculation method implementation 98
H.3 Minimum accuracy recommendations 99
H.3.1 Physical quantities 99
H.3.2 Recommended design limits to be included inside the flow calculation method (software) 99
H.4 Recommended testing procedure for system flow calculation method (software)
validation 99
H.4.1 General 99
H.4.2 System design fortesting 100
H.5 Pass/fail criteria 101
Bibliography 102Foreword
This document (EN 15004-1:2008) has been prepared by Technical Committee CEN/TC 191 “Fixed firefighting systems", the secretariat of which is held by BSI.
This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by December 2008, and conflicting national standards shall be withdrawn at the latest by December 2008.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom.
The text of the International Standard ISO 14520-1:2006 from Technical Committee ISO/TC 21 "Equipment for fire protection and fire fighting" of the International Organization for Standardization (ISO) has been taken over as a European Standard by Technical Committee CEN/TC 191 "Fixed firefighting systems", the secretariat of which is held by BSI, with common modifications which are indicated by a straight line in the margin of the text. Where the text in ISO 14520-1 gives the reference to "ISO 14520-1" or "this part of ISO 14520" this document refers only to "this document" and is not marked by a straight line.
This European Standard will consist of the following parts, under the general title "Fixed firefighting systems - Gas extinguishing systems":
— Part 1: Design, installation and maintenance (ISO 14520-1, modified)
—? Part 2: Physical properties and system design of gas extinguishing systems for FK-5-1-12 extinguishant (ISO 14520-5, modified)
—? Part 3: Physical properties and system design of gas extinguishing systems for HCFC Blend A extinguishant (ISO 14520-6, modified)
—? Part 4: Physical properties and system design of gas extinguishing systems for HFC 125 extinguishant (ISO 14520-8, modified)
—? Part 5: Physical properties and system design of gas extinguishing systems for HFC 227ea extinguishant (ISO 14520-9, modified)
—? Part 6: Physical properties and system design of gas extinguishin