IG-541 INERT GAS
FIRE EXTINGUISHING SYSTEM
OWNER’S MANUAL
Rev.3
PN: HSN-MNL-IG541-R3
15 Apr 2024
A
Foreword
This manual is written for those who own or are responsible for IG-541 Inert Gas Fire Extinguishing
System. We assume no responsibility for the application of any systems other than those addressed
in this manual. The technical data contained herein is limited strictly for information purposes only.
We believe this data to be accurate, but it is published and presented without any guarantee or
warranty whatsoever. We disclaim any liability for any use that may be made of the data and
information contained herein by any and all other parties.
The IG-541 Inert Gas Fire Extinguishing System is to be designed, installed, inspected, maintained,
tested and recharged by qualified, trained personnel in accordance with the following:
VdS 2344en: Procedure for the testing, approval and certification of products and systems
for fire protection and security technologies
EN15004-1: Fixed firefighting systems - Gas extinguishing systems
Storage, handling, transportation, service, maintenance, recharge and test of agent storage
containers shall be per-formed only by qualified and trained personnel in accordance with the
information in this manual and TPED Directive 2010/35/EU.
Any questions concerning the information presented in this manual should be addressed to:
Honeywell Middle East FZE
Jebel Ali Free Zone, Office No. LB15413, 18530
Jebel Ali, Dubai, UAE
Phone: +971 4 450 5800
Fax: +971 4 450 5900
Honeywell Nexus IG-541 Inert Gas
Fire Extinguishing System Owner’s
P/N: HSN-MNL-IG541-R3
15 Apr 2024
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B
Attention Installer
This form must be signed by the system owner indicating that he/she has received a copy of this
Owner’s Manual Copy. Have the system installer fill out this form.
Note: Retain a copy of this form for your records.
A System Installed:
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B Listing of Major System Components:
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C Description of Hazard Protected by System:
__________________________________________________________________________________________
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Owner or Authorized Representative
_________________
Date
_____________________________________
Title
Honeywell Nexus IG-541 Inert Gas
Fire Extinguishing System Owner’s
P/N: HSN-MNL-IG541-R3
15 Apr 2024
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C
History of Revisions
Table C.1 History of Revisions
Version
Revision Date
R.0
12 / 02 / 2024
R.1
01 / 04 / 2024
R.2
10 / 04 / 2024
R.3
15 / 04 / 2024
Honeywell Nexus IG-541 Inert Gas
Fire Extinguishing System Owner’s
Revision Detail
Document created.
Layouts, CPR valve location, manifold details and
cylinder codes have been revised.
Layouts have been revised.
The actuation pressure of the selector valve
actuator information has been added.
P/N: HSN-MNL-IG541-R3
15 Apr 2024
Revised by
D. Cagli Gel
D. Cagli Gel
D. Cagli Gel
D. Cagli Gel
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IG-541 Inert Gas Fire Extinguishing System
Table of Contents
0.
General Introduction ................................................................................................. 8
1.
Concept ..................................................................................................................... 9
1.1.
Application ....................................................................................................................... 9
1.2.
System Description ........................................................................................................... 9
1.2.1.
General ....................................................................................................................................... 9
1.2.2.
Extinguishing Agent .................................................................................................................. 10
1.2.2.1. Toxicity ........................................................................................................................................ 10
1.2.2.2. Environmentally Friendly ............................................................................................................ 11
1.2.2.3. Storage ....................................................................................................................................... 11
2.
Component Descriptions.......................................................................................... 14
2.1.
Introduction.................................................................................................................... 14
2.2.
Component Descriptions ................................................................................................. 16
2.2.1.
Seamless Cylinder ..................................................................................................................... 16
2.2.2.
Valve Assembly ......................................................................................................................... 18
.................................................................................................................................................................. 21
2.2.3.
Solenoid Actuator for DN12 valve system (P/N: HSN-ACT-S01) .................................................. 21
2.2.4.
Electric Actuator Reset Tool (for ACT-S01) (P/N: HSN-RST-01) .................................................... 23
2.2.5.
Manual Actuator (P/N: HSN-ACT-M01) ...................................................................................... 24
2.2.6.
Pneumatic Actuator (P/N: HSN-ACT-P01) .................................................................................. 24
2.2.7.
Discharge Hose (P/N: HSN-DH-12-400) ...................................................................................... 25
2.2.8.
Pilot Line Hose (P/N: HSN-PLH-01-500) ..................................................................................... 25
2.2.9.
Pilot Line Nipple Adaptor (P/N: HSN-PNA-01) ........................................................................... 25
2.2.10.
Bleed Valve (P/N: HSN-BLD-01) ................................................................................................. 26
2.2.11.
Check Valve (P/N: HSN-CHV-012) .............................................................................................. 26
2.2.12.
Discharge Pressure Switch (P/N: HSN-DPS-01) .......................................................................... 26
2.2.13.
Pressure Gauges ........................................................................................................................ 27
2.2.14.
Discharge Nozzles ..................................................................................................................... 28
2.2.15.
Pilot Cylinders ........................................................................................................................... 29
2.2.15.1.
Master Pilot Cylinder System .................................................................................................. 30
2.2.15.2.
Booster Pilot Cylinder System ................................................................................................. 30
2.2.16.
Selector Directional Valves ........................................................................................................ 31
2.2.17.
Pilot Line Non-Return Valve (P/N: HSN-NRV-01) ........................................................................ 33
2.2.18.
Constant Pressure Regulator Valve (P/N: HSN-CPR-10).............................................................. 33
2.2.19.
Pressure Reducer (P/N: HSN-PRD-01) ........................................................................................ 35
2.2.20.
Manifold Pressure Safety Valve (P/N: HSN-PSV-01) ................................................................... 35
2.2.21.
Vent Valve (P/N: HSN-VV-01)..................................................................................................... 35
2.2.22.
Label (P/N: HSN-LBL-IG541) ...................................................................................................... 35
2.2.23.
Caution Signs ............................................................................................................................ 36
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P/N: HSN-MNL-IG541-R3
15 Apr 2024
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3.
Other Accessories .................................................................................................... 37
3.1.
Pilot Cylinders (ATEX) ...................................................................................................... 37
4.
System Design ......................................................................................................... 38
4.1.
Introduction.................................................................................................................... 38
4.1.1.
4.1.2.
4.1.3.
4.1.4.
4.1.5.
4.1.6.
4.1.7.
4.1.8.
4.1.9.
4.1.10.
4.1.11.
Hazard Analysis ......................................................................................................................... 38
Determine which components are required .............................................................................. 39
Positioning of cylinders ............................................................................................................. 39
Positioning of piping ................................................................................................................. 39
Pipe size and layout .................................................................................................................. 39
Manifolds .................................................................................................................................. 40
Super-pressurization ................................................................................................................. 40
Design criteria ........................................................................................................................... 40
Design example and calculations .............................................................................................. 40
Duration of discharge ................................................................................................................ 43
Room Integrity and Pressure Ventilation ................................................................................... 44
5.
Installation .............................................................................................................. 47
5.1.
General Equipment Installation ....................................................................................... 47
5.2.
Order of Installation ........................................................................................................ 47
5.2.1.
Container installation ................................................................................................................ 48
5.2.1.1. Single container installation ....................................................................................................... 48
5.2.1.2. Multiple container installation ................................................................................................... 49
5.2.2.
Pipe installation ........................................................................................................................ 52
5.2.2.1. Pipe and fittings system .............................................................................................................. 53
5.2.2.2. Pipe hangers & fasteners ............................................................................................................ 53
5.2.2.3. Installation of pipe and fittings ................................................................................................... 53
5.2.2.4. Piping support installation .......................................................................................................... 54
5.2.3.
Master / slave cylinder installation ........................................................................................... 54
5.2.4.
Installation of pressure switch .................................................................................................. 55
5.2.5.
Installation of nozzles ............................................................................................................... 55
5.2.6.
Discharge piping pressure test .................................................................................................. 55
5.2.7.
Hand-over procedures .............................................................................................................. 56
5.2.8.
Warning notification ................................................................................................................. 56
6. System Operation ....................................................................................................... 58
6.1.
General Comments ......................................................................................................... 58
6.2.
System Actuation ............................................................................................................ 58
6.2.1.
6.2.2.
6.2.3.
6.3.
Manual system.......................................................................................................................... 58
Fully automatic system ............................................................................................................. 58
Fully automatic system with manual intervention..................................................................... 59
Actions Following a Fire................................................................................................... 59
6.3.1.
Actions immediately following a fire ......................................................................................... 59
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6.4.
Solenoid Functional Test.................................................................................................. 60
7. Maintenance .............................................................................................................. 61
7.1.
Introduction.................................................................................................................... 61
7.2.
Maintenance Procedure .................................................................................................. 61
7.2.1.
7.3.
Agent Storage Cylinders .................................................................................................. 61
7.3.1.
7.4.
General ..................................................................................................................................... 61
Container test ........................................................................................................................... 62
Hose Test ........................................................................................................................ 62
7.4.1.
7.4.2.
General ..................................................................................................................................... 62
Testing ...................................................................................................................................... 62
7.5.
Enclosure Inspection ....................................................................................................... 63
7.6.
Training .......................................................................................................................... 63
7.7.
Maintenance Procedures................................................................................................. 63
7.7.1.
Daily.......................................................................................................................................... 63
7.7.1.1. Check agent cylinder pressure .................................................................................................... 63
7.7.2.
Monthly .................................................................................................................................... 63
7.7.2.1. General inspection ...................................................................................................................... 63
7.7.2.2. Hazard access ............................................................................................................................. 64
7.7.2.3. Inspect hoses .............................................................................................................................. 64
7.7.2.4. Inspect pneumatic actuators ...................................................................................................... 64
7.7.2.5. Inspect solenoid actuators .......................................................................................................... 64
7.7.2.6. Inspect cylinder and valve assembly ........................................................................................... 64
7.7.2.7. Inspect straps and mounting hardware ...................................................................................... 64
7.7.2.8. Inspect discharge hoses .............................................................................................................. 64
7.7.2.9. Inspect discharge nozzles ........................................................................................................... 64
7.7.3.
Inspection procedures, semi-annual ......................................................................................... 65
7.7.3.1. Discharge pressure switch test ................................................................................................... 65
7.7.3.2. Solenoid actuator test................................................................................................................. 65
7.7.3.3. Check cylinder weight ................................................................................................................. 65
7.7.4.
Inspection procedures - 2 year .................................................................................................. 65
7.7.5.
Inspection procedures - 5 year .................................................................................................. 66
7.7.5.1. Clean Agent Cylinders ................................................................................................................. 66
7.7.5.2. Flexible hose ............................................................................................................................... 66
7.7.5.3. Record ......................................................................................................................................... 66
7.8.
Check List ....................................................................................................................... 66
8. Typical System Layout ................................................................................................. 67
8.1.
General........................................................................................................................... 67
Appendix A / Material Safety Data sheet for IG-541
Honeywell Nexus IG-541 Inert Gas
Fire Extinguishing System Owner’s
P/N: HSN-MNL-IG541-R3
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0.
General Introduction
This manual is a comprehensive guide the contains all the information needed to design, install
and maintain the IG-541 Inert Gas Fire Extinguishing System. Users of this manual are assumed
to be competent fire engineers with a basic knowledge of such systems. The contents are arranged
in alogical order describing the various procedures in turn, alternatively specific sections can be
referred to as required. Users who are not familiar with the equipment should first read the
complete manual. IG-541 is a nature, safe firefighting agent for use in total flooding automatic
extinguishing systems.
Systems may be activated mechanically or electrically. Mechanical manual actuation is via a strike
knob attached to the container valve. Electrical actuation is via a removable side mounted solenoid.
The solenoid can be energized automatically by a signal from a detection and alarm control panel.
Users of this manual should find that sufficient information is provided to plan, design, purchase
components, install, operate and maintain the system. However, in the event that part of the
document is not understood, or if there is any concern as to the suitability of the protection, do not
hesitate to contact one of our specialist engineers for the matter to be quickly resolved.
These include:
• Data Processing Centers
• Telecommunication Switch Centers
• Process Control Rooms
• Art and Historical Collections
• MRI Room in Hospital
• Process Control Station of Oil Refinery
• Marine Engine Rooms and Drone Control Center of Military
• An ideal supplement for sprinkler systems to protect any type of assets that could be damaged
by water.
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1.
1.1.
Concept
Application
IG-541 Inert gas fire extinguishing system is designed, installed, maintained and tested for total
flooding in accordance EPA and EN15004 standards. This is the time-tested agent available in the
market. IG-541 Inert gas fire extinguishing system are designed to extinguishes fires in specific
hazards or equipment located where an electrically non-conductive agent is required, where agent
cleanup creates a problem, where extinguishing capability with low weight is a factor and where
the hazard is normally occupied by personnel.
Features of IG-541 Inert gas:
• Ozone Depleting Potential (ODP) of Zero
• Requires minimal storage space
• No post-fire residue or clean up
• No damage to protected equipment
• Is electrically non-conductive
• Safe for use in a wide range of normally occupied hazard areas
• SNAP List Approved
• No atmospheric lifetime
• No global warming potential
Typical Application:
• Telecommunication switch rooms
• Computer and electronic control rooms
• Banking Data Centre
• Marine Engine Rooms and Drone Control Center of Military
• Control Rooms in Power Generation Plants
• Control Rooms in Petrochemical Installations
1.2.
System Description
1.2.1. General
IG-541 Inert gas fire extinguishing system is a time-tested natural inert gas agents alternative. It
combines outstanding extinguishing performance with an excellent environmental profile. IG-541
Inert gas has zero ozone depletion potential and zero global warming potential of atmospheric
lifetime, and a large margin of safety for occupied spaces. The IG-541 inert gas extinguishes fire
by lowering the oxygen content below the level that supports combustion. It is also electrically
non-conductive.
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Figure 1.1: Typical IG-541 Inert Gas Fire Extinguishing Systems
IG-541 Inert Gas Systems are designed for the following classes of fire:
• Class A; Surface Type Fires; Wood, cloth, rubber, paper and many plastics.
• Class B; Flammable liquids
• Class C; Energized electrical equipment
1.2.2. Extinguishing Agent
IG-541 Inert gas agent, referenced as Nitrogen (%52), Argon (%40) & CO2(%8) in EN15004-10 and
ISO 14520-12, the there gases Nitrogen, Argon and CO2 are mixed in proportions: %52, %40 & %8
Nitrogen, Argon and CO2 are natural components of air and theirs constituting approximately 0.79%
of the earth’s atmosphere. They are a clear, colorless, odorless gases. These agents are discharged
into a room, they introduces the proper natural of gases that still allows a person to breathe in a
reduced oxygen atmosphere. This allows people to see and breathe, permitting them to leave the
fire area safely.
+
+
Figure 1.2.: IG-541 Monoatomic & Molecular noble gases
1.2.2.1.
Toxicity
It is commonly known that the reduction of oxygen had some side effects. It is important to
understand that the Inert gases (He, Ne, Ar, N etc.) and nitrogen do not have any toxic effects at
normal atmospheric pressures. (No toxicological effects from this product.)
Honeywell Nexus IG-541 Inert Gas
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Table 1.1. Design Concentrations
Agent
Extinguishment
Minimum design
% by volume
% by volume
Class B
31.7
Heptane (cup burner)
48.1
37.0
Heptane (room test)
Surface Class A
Wood crib
28.2
PMMA
30.7
PP
30.6
ABS
30.7
Higher Hazard Class A
a
39.9
45.7
a: The minimum design concentration for Higher Hazard Class A fuels shall be the higher of the Surface Class A or 95
% of the Class B minimum design concentration
Reference: EN15004-10, Table 4 — IG-541 reference extinguishing and design concentrations
Table 1.2. Physiological information for IG-541
Agent
LC50 or ALC (%)
NOAEL
LOAEL
Nitrogen & Argon
N/A
43.0 %
52.0 %
CO2
470,000 ppm (Rat)
43.0 %
52.0 %
NOTE.1: LC50 is the concentration lethal to 50 % of a rat population during a 4 h exposure. The ALC is the approximate
lethal concentration.
NOTE.2: The cardiac sensitization levels are based on the observance or non-observance of serious heart arrhythmias
in a dog. The usual protocol is a 5 min exposure followed by a challenge with epinephrine.
NOTE.3: High concentration values are determined with the addition of oxygen to prevent asphyxiation.
Reference: EN15004-9, Table 5 — Physiological information for IG-541
1.2.2.2.
Environmentally Friendly
IG-541 has zero ozone depletion potential and zero atmospheric lifetime, IG-541 is the preferred
naturally inert agents alternatives to offer a viable, long-term, sustainable technology for special
hazards fire protection.
Table 1.3. Environmental Properties
Description
IG-01
IG-55
IG-100
IG-541
Ozone Depletion Potential
0.0
0.0
0.0
0.0
Global Warming Potential
N/A
N/A
N/A
N/A
Atmospheric Lifetime (Years)
N/A
N/A
N/A
N/A
SNAP (YES/NO)
Yes
Yes
Yes
Yes
Reference: World Meteorological Organization (WMO) 1998, Model-Derived Method Intergovernmental Panel on
Climate Change (IPCC) 2007 Method, 100-year ITH (4th IPCC report)
1.2.2.3.
Storage
IG-541 Inert Gas Agent are stored as a gas in steel containers with storage pressure of 200 bar
(2900 psi) or 300 bar (4350 psi) @ 15 ⁰C (60 ⁰F). To displace the extinguishing clean agent out of
the steel containers through the pipelines to the nozzles in protected hazard, no added any other
Honeywell Nexus IG-541 Inert Gas
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component as a propellant to improve the discharge characteristics. IG-541 inert gas system is
available in two variants.
• 200 Bar system: IG-541 inert gas agent is stored in seamless cylinder as gas with nitrogen and
argon to 200 Bar at 15°C (2900 psi at 60 °F).
• 300 Bar system: IG-541 inert gas agent is stored in seamless cylinder as gas with nitrogen and
argon to 300 Bar at 15°C (4350 psi at 60 °F).
Table 1.4. Storage container characteristics tables for IG-541 200 Bar
Property
Unit
Value
Filling Pressure at 15°C
a
bar
200
Maximum container working pressure at 50°C
bara
235
Reference should be made to Figure 1 for further data on pressure / temperature relationships.
a
1 bar = 0,1 MPa = 10 5 Pa; 1 MPa = 1 N/mm2
Table 1.5. Storage container characteristics tables for IG-541 300 Bar
Property
Unit
Filling Pressure at 15°C
Maximum container working pressure at 50°C
Value
a
bar
300
a
366
bar
Reference should be made to Figure 1 for further data on pressure / temperature relationships.
a
1 bar = 0,1 MPa = 10 5 Pa; 1 MPa = 1 N/mm2
Pressure/Temperature
Graph (IG-541)
Pressure/Temperature
Graph (IG-541)
300 a: pressure at 15°C, bar
290
280
270
260
250
240
230
220
210
200
190
180
170
160
150
PRESSURE (BARA)
PRESSURE (BARA)
200 a: pressure at 15°C, bar
-20 -10 0
10 20 30 40 50 60 70 80 90
450
400
350
300
250
200
150
100
50
0
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80
TEMPERATURE (°C)
TEMPERATURE (°C)
Figure 1.3.: Temperature/pressure graph for IG-541 to 200 bar and 300 bar
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Table 1.6. Agent Container Fill Quantity for 13, 40, 80 & 140L Cylinders for 200 Bar
13 L
40 L
80 L
140 L
Weight
Volume
Weight
Volume
Weight
Volume
Weight
Volume
IG-01
4.6 kg
2.7 m3
14.1 kg
8.4 m3
28.2 kg
16.7 m3
49.3 kg
29.2 m3
IG-55
3.7 kg
2.6 m3
11.4 kg
7.9 m3
22.8 kg
15.9 m3
39.9 kg
27.8 m3
IG-100
2.9 kg
2.4 m3
8.9 kg
7.5 m3
17.9 kg
15.1 m3
31.3 kg
26.4 m3
IG-541
3.9 kg
2.7m3
11.9 kg
8.2 m3
23.8 kg
16.5 m3
41.6 kg
28.9 m3
Table 1.7. Agent Container Fill Quantity for 13, 40, 80 & 140L Cylinders for 300 Bar
13 L
40 L
80 L
140 L
Weight
Volume
Weight
Volume
Weight
Volume
Weight
Volume
IG-01
6.5 kg
3.9 m3
20.1 kg
11.9 m3
40.3 kg
23.8 m3
70.5 kg
41.7 m3
IG-55
5.3 kg
3.6 m3
16.1 kg
11.1 m3
32.1 kg
22.3 m3
56.2 kg
39.1 m3
IG-100
4.0 kg
3.4 m3
12.4 kg
10.5 m3
24.9 kg
21.0 m3
43.5 kg
36.7 m3
IG-541
5.4 kg
3.7 m3
16.5 kg
11.5 m3
33.1 kg
23.0 m3
57.9 kg
40.1 m3
Table 1.8. Inert Gas Density & Volume Quantity for 200 & 300 Bar
Density 200 Bar@15°C
IG-01
352.1 kg/m
3
IG-55
Volume 1 atm @15°C
Density 300 Bar@15°C
3
Volume 1 atm
@15°C
0.5920 m /kg
503.4 kg/m
3
0.5920 m3/kg
284.8 kg/m3
0.6969 m3/kg
401.1 kg/m3
0.6969 m3/kg
IG-100
223.8 kg/m3
0.8463 m3/kg
311.0 kg/m3
0.8463 m3/kg
IG-541
297.1 kg/m3
0.6938 m3/kg
413.2 kg/m3
0.6938 m3/kg
Table 1.9. Physical Properties of IG-541
Properties
IG-541
Chemical Name
Nitrogen, Argon, Carbon dioxide
Chemical Formula
(%52) N2, (%40) Ar, (%8) CO2
Molecular Weight
34.00 g/mol
Boiling Point @ 1 atm
-196.0 ⁰C
Critical Temperature
-78.5 ⁰C (-109.3 ⁰F)
Relative Density
1.4236 kg/m3@15 ⁰C
Gas Density @ 1 atm
N/A
Vapor Pressure 20 °C
152
Solubility of Water in IG-541 @ 0 °C (32°F)
17.1 ml/L
Ozone Depletion Potential
0.0
Global Warming Potential, GWP (100yr ITH.for Co₂, GWP=1)
N/A
Atmospheric Lifetime
N/A
TSCA Inventory Status
Reported / Included
European List of New Chemical Substances
EINECS, Listed (231-147-0 & 231-783-0 &204-696-9)
SNAP Status
Listed
Reference: IG-541 gas manufacturer’s MSDS
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2.
2.1.
Component Descriptions
Introduction
This chapter provides a functional description of the components and assemblies of the IG-541
Inert Gas Fire Extinguishing System.
Table 2.1. Part List
Description
Part Number
200&300 Bar Cylinder Sets
13L Seamless Cylinder, TPED, 200bar (filled with IG-541 gas)
(including DN12 valve, bracket and label)
13L Seamless Cylinder, TPED, 300bar (filled with IG-541 gas)
(including DN12 valve, bracket and label)
40L Seamless Cylinder, TPED, 200bar (filled with IG-541 gas)
(including DN12 valve, bracket and label)
40L Seamless Cylinder, TPED, 300bar (filled with IG-541 gas)
(including DN12 valve, bracket and label)
80L Seamless Cylinder, TPED, 200bar (filled with IG-541 gas)
(including DN12 valve, bracket and label)
80L Seamless Cylinder, TPED, 300bar (filled with IG-541 gas)
(including DN12 valve, bracket and label)
140L Seamless Cylinder, TPED, 200bar (filled with IG-541 gas)
(including DN12 valve, bracket and label)
140L Seamless Cylinder, TPED, 300bar (filled with IG-541 gas)
(including DN12 valve, bracket and label)
HSN-IG541-013-210E
HSN-IG-541-013-310E
HSN-IG-541-040-210E
HSN-IG-541-040-310E
HSN-IG-541-080-210E
HSN-IG-541-080-310E
HSN-IG-541-140-210E
HSN-IG-541-140-310E
Pressure Gauges
0-315 Bar Pressure gauge at 180bar, NO (with low pressure switch)
HSN-IG-PGV-NOC-01
0-400 Bar Pressure gauge at 270bar, NO (with low pressure switch)
HSN-IG-PGV-NOC-02
0-160 Bar Pressure gauge at 90bar, NO (with low pressure switch
*Available for pilot cylinders)
HSN-PGV-NOC-300
Pilot Cylinders
5L Seamless Pilot Cylinder, TPED
(filled with N2 gas and including DN12 valve, bracket and label)
13L Seamless Pilot Cylinder, TPED
(filled with N2 gas and including DN12 valve, bracket and label)
40L Seamless Pilot Cylinder, TPED
(filled with N2 gas and including DN12 valve, bracket and label)
HSN-PLT-EU-SM-005
HSN-PLT-EU-SM-013
HSN-PLT-EU-SM-040
Pilot Cylinders (ATEX)
5L Seamless Pilot Cylinder, TPED, ATEX
(filled with N2 gas and including DN12 valve, bracket and label)
13L Seamless Pilot Cylinder, TPED, ATEX
(filled with N2 gas and including DN12 valve, bracket and label)
Honeywell Nexus IG-541 Inert Gas
Fire Extinguishing System Owner’s
P/N: HSN-MNL-IG541-R3
15 Apr 2024
HSN-PLTA-EU-SM-005
HSN-PLTA-EU-SM-013
Page
14 / 74
Table 2.1. Part List (continued)
Description
40L Seamless Pilot Cylinder, TPED, ATEX
(filled with N2 gas and including DN12 valve, bracket and label)
Part Number
HSN-PLTA-EU-SM-040
Actuators
Manual Actuator
HSN-ACT-M01
Manual Actuator, ATEX (for DN12 24VDC Solenoid Valve)
HSN-ACT-M02
Solenoid Actuator, 24V DC (suitable with 12mm valve)
HSN-ACT-S01
Pneumatic Actuator
HSN-ACT-P01
Reset Tool for ACT-S01 Type (Electrical Actuator)
HSN-RST-S01
Cylinder Discharge Line Hose
Discharge Hose, L:400mm, 12mm (13L to 140L)
HSN-DH-12-400
Check Valves
Check Valve DN12, G3/4” x G3/4”
HSN-CHV-012
Actuation Line Accessories
Pilot Line Hose, DN5 500 mm - 360bar
HSN-PLH-01-500
Pilot Line Nipple Adaptor
HSN-PNA-01
Pilot Line Te Adaptor (Male x Female (Turnable) x Male)
HSN-PTA-01
Pilot Line Elbow Adaptor
HSN-PEA-01
Bleed Valve
HSN-BLD-01
Pilot Line Non-return Valve
HSN-NRV-01
Constant Pressure Regulator (PW max: 360bar)
HSN-CPR-10
Discharge Nozzles
DN10 (3/8") - 180 Degree Discharge Nozzle
HSN-NOZ-01-10
DN10 (3/8") - 360 Degree Discharge Nozzle
HSN-NOZ-02-10
DN15 (1/2") - 180 Degree Discharge Nozzle
HSN-NOZ-01-15
DN15 (1/2") - 360 Degree Discharge Nozzle
HSN-NOZ-02-15
DN20 (3/4") - 180 Degree Discharge Nozzle
HSN-NOZ-01-20
DN20 (3/4") - 360 Degree Discharge Nozzle
HSN-NOZ-02-20
DN25 (1") - 180 Degree Discharge Nozzle
HSN-NOZ-01-25
DN25 (1") - 360 Degree Discharge Nozzle
HSN-NOZ-02-25
DN32 (11/4") - 180 Degree Discharge Nozzle
HSN-NOZ-01-32
DN32 (11/4") - 360 Degree Discharge Nozzle
HSN-NOZ-02-32
DN40 (11/2") - 180 Degree Discharge Nozzle
HSN-NOZ-01-40
DN40 (11/2") - 360 Degree Discharge Nozzle
HSN-NOZ-02-40
DN50 (2") - 180 Degree Discharge Nozzle
HSN-NOZ-01-50
DN50 (2") - 360 Degree Discharge Nozzle
HSN-NOZ-02-50
Switches
Discharge Pressure Switch
HSN-DPS-01
Caution Signs
Protected Room Caution Sign for IG-541 System
HSN-CS-IG541-01
Manual Release Point Caution Sign
HSN-CS-MRP-01
Selector Valves
3/4" Selector Valve, BSP Threaded (Pw max: 140bar)
Honeywell Nexus IG-541 Inert Gas
Fire Extinguishing System Owner’s
P/N: HSN-MNL-IG541-R3
15 Apr 2024
HSN-SV-01-020
Page
15 / 74
Table 2.1. Part List (continued)
Description
Part Number
1" Selector Valve, BSP Threaded (PW max: 140bar)
HSN-SV-01-025
1 1/4" Selector Valve, BSP Threaded (PW max: 140bar)
HSN-SV-01-032
11/2" Selector Valve, BSP Threaded (PW max: 140bar)
HSN-SV-01-040
2" Selector Valve, BSP Threaded (PW max: 140bar)
HSN-SV-01-050
21/2" Selector Valve, ISO Flange Connection (PW max: 140bar)
HSN-SV-01-065
3" Selector Valve, ISO Flange Connection (Pw max: 140bar)
HSN-SV-01-080
4" Selector Valve, ISO Flange Connection (Pw max: 140bar)
HSN-SV-01-100
Pressure Safety Valves
Manifold Pressure Safety Valve
(Factory set point: 100 bar, PW max: 1500bar)
Pressure Reducer (Factory set point: 8bar, PW max: 100bar)
HSN-PSV-01
HSN-PRD-01
Vent Valve
Vent Valve, PW max: 360bar
HSN-VV-01
Label
IG-541 Label
2.2.
HSN-LBL-IG541
Component Descriptions
2.2.1. Seamless Cylinder
IG-541 Inert Gas Agent are stored as a gas in steel containers with storage pressure of 200 bar
(2900 psi) or 300 bar (4350 psi) @ 15 ⁰C (60 ⁰F). To displace the extinguishing clean agent out of
the steel containers through the pipelines to the nozzles in protected hazard, no added any other
component as a propellant to improve the discharge characteristics. IG-541 inert gas system is
available in two variants.
• 200 Bar system: IG-541 inert gas agent is stored in seamless cylinder as gas with nitrogen, argon
and carbon dioxide to 200 Bar at 15°C (2900 psi at 60 °F).
• 300 Bar system: IG-541 inert gas agent is stored in seamless cylinder as gas with nitrogen, argon
and carbon dioxide to 300 Bar at 15°C (4350 psi at 60 °F).
An identification label is affixed to the cylinder body indicating the fill quantity of IG-541, charging
pressure and date of fill. Many variations in cylinder capacities (Refer Table 2.1.) to select the best
as per project requirement. Fire extinguishing systems utilizing IG-541 inert gas systems are
designed to be discharged within 60-120 seconds into a room, area, or enclosure with the structural
integrity to retain the agent. The IG-541 inert gas system uniformly mixes throughout the protected
area achieving a minimum concentration level in accordance with EN15004-10.
Honeywell Nexus IG-541 Inert Gas
Fire Extinguishing System Owner’s
P/N: HSN-MNL-IG541-R3
15 Apr 2024
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Discharge Valve
N2&Ar&CO2 Inert Gas Stored at 200/300 Bar
Figure 2.1.: Typical seamless cylinder & valve assembly
Table 2.2. 200/300 Bar IG-541 Inert Gas Seamless Cylinders
Cylinder
Part Number
HSN-IG541013-210E/310E
HSN-IG541040-210E/310E
HSN-IG541080-210E/310E
HSN-IG541140-210E/310E
Cylinder
Empty
System
Agent
Total
System
Agent
Total
Volume
Diameter
Weight
Pressure
Capacity
Weight
Pressure
Capacity
Weight
liter
mm*
kg**
bar
kg (m3)
kg
bar
kg (m3)
kg
13
203
21.5
40
219
47.8
3.9
(2.7)
11.9
(8.2)
200
80
267
82.8
140
356
229.5
23.8
(16.5)
41.6
(28.9)
5.4
25.4
16.5
59.7
300
106.6
271.1
26.9
(3.7)
64.3
(11.5)
33.1
115.9
(23.0)
57.9
287.4
(40.1)
* Cylinder diameters have tolerance +/- 1% according to cylinder manufacturer.
* Cylinder weights are approximately.
IG-541 inert gas fire extinguishing system equipment’s are designed for an operating temperature
range of 0°C to 50°C (32°F to 122°F).
Honeywell Nexus IG-541 Inert Gas
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2.2.2. Valve Assembly
The automatic release of IG-541 inert gas is controlled by a forged brass, differential pressure
operated cylinder valve connected to the neck of the cylinder. Each cylinder and valve assembly
are provided with a safety cap and a protection cap which is a safety feature to prevent
uncontrolled, accidental discharge. Discharge valve assembly is available in size DN12.
Figure 2.2.: General Arrangement of DN12 Discharge Valve.
Honeywell Nexus IG-541 Inert Gas
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15 Apr 2024
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4
1
5
1
6
3
1
2
1
7
1
1
1
8
1
1
1
1
d
f
d
f
d
1
1
1
d
f
d
f
d
H1
H2
H3
Ø
H4
9*
Figure 2.3.: Single Cylinder Configuration Arrangement of Assembly of 13, 40, 80 & 140L System.
*: It is changeable quantities according to the size of cylinders.
Table 2.3. Hardware for 13 & 40 & 80 & 140L Cylinders 200 bar & 300 bar
No.
Description
Part Number
1
DN12 Discharge Valve
2.1
0-315 Bar Pressure gauge with low pressure
switch 180bar (NO)
2.2
200 Bar
300 Bar
HSN-VLV-IG-200-01E
HSN-VLV-IG-300-01E
HSN-IG-PGV-NOC-01
N/A
N/A
HSN-IG-PGV-NOC-02
0-400 Bar Pressure gauge with low pressure
switch 270bar (NO)
3
Solenoid Actuator, 24V DC
HSN-ACT-S01
4
Manual Actuator
HSN-ACT-M01
5
Constant Pressure Regulator, PW max: 360bar
HSN-CPR-10
6
Check Valve DN12, G3/4” x G3/4”
HSN-CHV-012
7
Discharge Hose DN12, L:400mm
HSN-DH-12-400
8.1
13L Seamless Cylinder, TPED
HSN-IG541-013-210E
HSN-IG541-013-310E
8.2
40L Seamless Cylinder, TPED
HSN-IG541-040-210E
HSN-IG541-040-310E
8.3
80L Seamless Cylinder, TPED
HSN-IG541-080-210E
HSN-IG541-080-310E
8.4
140L Seamless Cylinder, TPED
HSN-IG541-140-210E
HSN-IG541-140-310E
9.1
13L Seamless Cylinder Strap
HSN-STP-EU-SM-013
9.2
40L Seamless Cylinder Strap
HSN-STP-EU-SM-040
9.3
80L Seamless Cylinder Strap
HSN-STP-EU-SM-080
9.4
140L Seamless Cylinder Strap
HSN-STP-EU-SM-140
Honeywell Nexus IG-541 Inert Gas
Fire Extinguishing System Owner’s
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15 Apr 2024
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Table 2.4. Dimensions for 13 & 40 & 80 & 140L Cylinders for 200&300 Bar
Type
H1 (mm)
H2 (mm)
H3 (mm)
H4 (mm)
Ø (mm)
13L
405
-
603
997
203
40L
248
998
1323
1717
219
80L
375
1335
1753
2147
267
140L
325
1225
1632
2026
356
5
6
1
31
1
21
11d
11f
11
1d
1df
d
f1fd
dd
ff
dd
f
d
1
1
1
d
f
d
f
d
1 71
1 1
1 1
d d
f f
d d
f f
d d
8
9
8
1
1
1
d
f
d
f
d
1
1
110
1
d11
1
f 1
1
d121
1d1
f
1f
d d
1df
df
13*d
1fd
f
1d
d
1f
d
f
d
f
Figure 2.4.: Multiple Cylinder Configuration Arrangement of Assembly of 80 & 140L System.
d
*: It is changeable quantities according to the size of cylinders.
4
Table 2.5. Hardware for 80 & 140L Cylinders 200 bar & 300 bar
No.
Description
Part Number
1
DN12 Discharge Valve
2.1
0-315 Bar Pressure gauge with low pressure
switch 180bar (NO)
2.2
0-400 Bar Pressure gauge with low pressure
switch 270bar (NO)
200 Bar
300 Bar
HSN-VLV-IG-200-01E
HSN-VLV-IG-300-01E
HSN-IG-PGV-NOC-01
N/A
N/A
HSN-IG-PGV-NOC-02
3
Solenoid Actuator, 24V DC
HSN-ACT-S01
4
Manual Actuator
HSN-ACT-M01
5
Constant Pressure Regulator, PW max: 360bar
HSN-CPR-10
6
Pilot Hose DN5, PW max: 360bar
7
Pneumatic Actuator, PW max: 360bar
HSN-ACT-P01
8
G1/8" x G1/8" Nipple Adaptor, PW max:360bar
HSN-PNA-01
9
G1/8" Bleed Valve, PW max: 360bar
HSN-BLD-01
10
Check Valve DN12, G3/4” x G3/4”
HSN-CHV-012
11
Discharge Hose DN12, L:400mm
12.1
80L Seamless Cylinder, TPED
HSN-IG541-080-210E
HSN-IG541-080-310E
12.2
140L Seamless Cylinder, TPED
HSN-IG541-140-210E
HSN-IG541-140-310E
13.1
80L Seamless Cylinder Strap
HSN-STP-EU-SM-080
13.2
140L Seamless Cylinder Strap
HSN-STP-EU-SM-140
Honeywell Nexus IG-541 Inert Gas
Fire Extinguishing System Owner’s
HSN-PLH-01-500
HSN-DH-12-400
P/N: HSN-MNL-IG541-R3
15 Apr 2024
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Table 2.6. Dimensions for 80 & 140L Cylinders for 200&300 Bar
Type
H1 (mm)
H2 (mm)
H3 (mm)
H4 (mm)
Ø (mm)
80L
375
1335
1753
2147
267
140L
325
1225
1632
2026
356
Figure 2.5.: General Arrangement of Assembly of Single & Multiple Systems.
2.2.3. Solenoid Actuator for DN12 valve system (P/N: HSN-ACT-S01)
The Solenoid Actuator attaches to the primary cylinder at the valve actuation connection and is
utilized to automatically open the cylinder valve upon receipt of a signal from the control panel or
other source.
1
2
3
1
Table 2.7. Solenoid Actuator for DN12 valve system
No.
1
Description
1
Connection for manual actuator
2
Connector plug for wiring
3
Connection to cylinder valve
1
Figure 2.6: Solenoid actuator for DN12 valve system.
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Table 2.8. Solenoid Actuator Pin Position
No.
1
Description
Solenoid actuator falling pin
1
Before activation
1
After activation
Figure 2.7.: Solenoid actuator activation before vs after.
IMPORTANT NOTICE:
After the solenoid actuator is activated, the pin will fall downwards. The falling pin must be reset by pushing
up as before activation. Otherwise, if the solenoid actuator assembly to top on valve with falling pin, the system
will discharge incorrectly. To avoid this, the falling pin must be reset by a special tool.
IMPORTANT NOTICE:
The Solenoid Actuator circuit must be supervised for a break in the
wiring, a ground, or a short circuit. Make sure that the pilot wire is
free of any voltage when assembling the connector; otherwise, an
inadvertent activation of the extinguishing system could be
caused.
Figure 2.8.: Solenoid actuator wiring connection.
Materials:
Body, screws, cap nuts, seals: Brass, stainless steel, nickel-plated steel, elastomeric seals, plastic
Table 2.9. Electrical Data of Solenoid Actuator for DN12 valve system
Voltage
24 VDC (+/-10%)
Temperature range
-20 ºC to +50 ºC
Max. current at 20 ºC
0.5 A
Power input
4.5 W
Duty cycle
100% ED
Permanent magnet
Nd-Fe-B
Permanent diagnostic current
0.02 A
Protection class (DIN VDE 0580)
IP 65 (With assembled cable connector and attached
sealing)
Table 2.10. Features of Solenoid Actuator for DN12 valve system
L1
160mm
L2
108mm
A
Male connectors plug socket DIN EN 175301-803 Form A
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15 Apr 2024
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1
L2
L1
A
Figure 2.9.: Solenoid actuator dimensions
2.2.4. Electric Actuator Reset Tool (for ACT-S01) (P/N: HSN-RST-01)
The installation, maintenance and inspection of this system may use specialized tools to attach
or tighten various components. The reset tool, which is the lever-operated type, is one of them.
Remove / unscrew the solenoid actuator. A special resetting tool must be used to re-insert the
plunger. Screw the resetting tool to the plunger solenoid valve port whit a wrench of 41 mm.
Operate the lever by pulling.
Released electrical release device HSN-ACT-S01,
see red marking at the push rod.
Position A: Reset tool assembly.
Position B: The reset tool HSN-RST-01 is mounted
hand-tight to the electrical release device HSN-ACT-S01.
Then pull the lever by 90° to tense the release device.
Figure 2.10.: Reset tool for electric actuator.
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2.2.5. Manual Actuator (P/N: HSN-ACT-M01)
The manual actuator allows manual activation of the cylinder valve. It is compulsory to always
include such an actuator. Located on top of the cylinder valve or solenoid valve, the lever is
manually operated to open the valve and activate the system. It includes a safety pin to prevent
accidental activation and this safety pin incorporates a safety seal to avoid incorrect manipulation.
1
4
1
2
3
1
1
Table 2.11. Manual Actuator
No.
Description
1
Lever
2
Safety lock
3
Connection to cylinder valve or solenoid actuator
4
Safety pin
1
Figure 2.11.: Manual actuator
2.2.6. Pneumatic Actuator (P/N: HSN-ACT-P01)
On multiple cylinder systems, the Solenoid Actuator will actuate the master (primary) cylinder and
then, in a rapidly occurring sequence, the pneumatic actuator will actuate all other slave cylinders
valve, using pressure of the master (primary) cylinder.
The pneumatic actuator attaches to the valve actuation connection of each slave cylinder. It
receives pressure from the actuation port of the master (primary) cylinder through the pilot
actuation hose. The body of the pneumatic actuator is made from brass and an internal mechanism
consists of brass piston and pin.
1
Table 2.12. Pneumatic Actuator
1
No.
Description
1
Pilot actuation hose connection
2
Connection to cylinder valve
2
1
Figure 2.12.: Pneumatic actuator
IMPORTANT NOTICE:
After the pneumatic actuator is activated, the pin will
fall downwards. The falling pin must be reset by
pushing up as before activation. Otherwise, if the
pneumatic actuator assembly to top on valve with
Before activation
After
falling pin, the system will discharge incorrectly.
Figure 2.13.: Pneumatic actuator activation before vs after
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2.2.7. Discharge Hose (P/N: HSN-DH-12-400)
The discharge hose is used to connect the cylinder valve to the manifold so to direct the agent flow
to the pipe network. It is installed between the cylinder valve and the check valve. In case of a
modular cylinder, it is installed directly to the discharge pipe. Discharge hose adaptors are used to
supply easy connection between discharge hoses and check valves for multiple cylinders systems.
1
Table 2.13. Discharge Hose for DN12 Valve
1
31
2
2
No.
Description
1
Inlet W21,8x1/14”" female turnable
2
Flexible hose, DN12, L: 400mm
3
Outlet G3/4” 12UN female turnable
Figure 2.14.: Discharge hose for DN12 valve
2.2.8. Pilot Line Hose (P/N: HSN-PLH-01-500)
The Pilot Line Hose is a flexible connection in the release circuit to activate the valves
pneumatically. It is installed between the pilot line connection from the Master cylinder valve to the
pneumatic actuators and/or pneumatic-manual actuator on the slave cylinders.
Table 2.14. Pilot Line Hose
1
1
No.
3
2
2
1
Description
1
Swivel female M12x1.5
2
Flexible hose, DN5, L: 500mm
3
Swivel female M12x1.5
Figure 2.15.: Pilot line hose
2.2.9. Pilot Line Nipple Adaptor (P/N: HSN-PNA-01)
The Pilot Line Nipple Adaptor is a flexible connection in the release circuit to activate the valves
pneumatically. It is installed between the pilot line connection from the Master cylinder valve to the
pneumatic actuators and/or pneumatic-manual actuator on the slave cylinders. The Pilot Line
Nipple Adaptor available working pressure is 360bar.
Table 2.15. Pilot Line Nipple Adaptor
1
1
2
1
No.
Description
1
M12x1.5 male threaded connection
2
G1/8" male threaded connection
Figure 2.16.: Pilot line nipple adaptor
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2.2.10. Bleed Valve (P/N: HSN-BLD-01)
The Bleed Valve vents pressure or release small leaking gas from the pilot line to protect the
system from fault actuation when one or more cylinders leak gas into the pilot actuation line.
Pwmax 360bar and Reseating Volume Flow ~30l/min
Reseating Pressure 0,5bar (Static) / ~ 0,7bar (Dynamic)
1
Table 2.16. Bleed Valve
1
No.
1
Description
G1/8" male threaded connection
Figure 2.17.: Bleed valve
2.2.11. Check Valve (P/N: HSN-CHV-012)
Check Valves are installed at the discharge manifold in a multiple cylinder arrangement to allow
removal of any IG-541 cylinder from the manifold while still retaining a closed system. Check valves
are used only in bank of cylinders. It prevents the gas backflowing from the manifold pipe into the
cylinders, thus ensuring a complete discharge of all the cylinders. It also acts as a safety element
during maintenance operations in case cylinders are disconnected from the manifold and an
accidental discharge is produced it prevents the gas from being released and injuring personnel.
2
1
IMPORTANT NOTICE:
Make sure that check valve flow direction is showing right position. To be sure
about that, follow the flow direction arrow; it must be assembled while arrow
showed the flow direction from downward to upward.
1
1
Figure 2.18.: Check valve
Table 2.17. Check Valve
Description
Part Number
1
2
DN12 Check Valve
HSN-CHV-012
G3/4” BSP Female Inlet
G3/4” BSP Male Outlet
2.2.12. Discharge Pressure Switch (P/N: HSN-DPS-01)
Discharge Pressure Switch closes or opens an electric circuit when a discharge from the manifold
takes place. Notifying gas flow has occurred. The electric signal may be monitored by a control
panel to operate and/or shut down other electrical devices. Once activated it is rearmed manually
by pulling the rearming button which incorporates the latching mechanism. This switch can be
mounted in any position though the preferred installation is upright. Wiring diagram for connection
of switch is shown in below figure.
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1
1
Table 2.18. Discharge Pressure Switch
2
3
1
No.
1
Description
1
Electrical switch body
2
Reset button
3
Connection to manifold, G1/2" male thread
Figure 2.19.: Discharge pressure switch
IMPORTANT NOTICE:
While installation of the Discharge Pressure Switch, gas leakage has to be prevented from the connection
point. Discharge Pressure Switch maximum working pressure is 360 bar.
Discharge Pressure Switch body material are brass, nickel-plated steel, elastomeric seals and plastic.
Table 2.19. Electrical Data of Discharge Pressure Switch
Max voltage
400V AC/DC
Temperature range
-20 ºC to +60 ºC
Thermal current
10 A
Conditional short circuit current
100 A acc. to EN 60947-5-1
Protection against short circuits
Type aM fuse 10 A 500 V
Pollution degree
3
IP 67 acc. to EN 60529 (With cable gland presenting
Protection degree
same or higher protection degree)
2.2.13. Pressure Gauges
A pressure gauge is provided with each cylinder valve to indicate the pressure inside the cylinder.
Its electrical contact allows real time monitoring notifying in case of leaks.
1
2
3
1
1
1
Table 2.20. Pressure Gauges
No.
Description
1
Contacted point indicator *
2
Gauge display screen
3
Connection to cylinder valve
* There is contacted point indicator at low pressure switch type gauge models only.
Figure 2.20.: Pressure gauge
IMPORTANT NOTICE:
• Use only pressure gauges supplied by Honeywell.
• The pressure gauges can be assembled and disassembled under pressure.
• Before mounting the pressure gauge, the plug screw at the pressure gauge connection on the valve shall
be unscrewed. When dismounting the pressure gauge the plug screw shall be screwed back in place.
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Table 2.21. Available Types of Pressure Gauges
Description
Part Number
0-315 Bar Pressure gauge with low pressure switch
*Available for 200bar storage system
0-400 Bar Pressure gauge with low pressure switch
*Available for 300bar storage system
Contacted Switch
HSN-IG-PGV-NOC-01
HSN-IG-PGV-NOC-02
0-160 Bar Pressure gauge with low pressure switch at
90bar (NO)
HSN-PGV-NOC-300
Gives NO contact
at 180bar
Gives NO contact
at 270bar
Gives NO contact
* Available for pilot cylinders
at 90bar
Table 2.22. Electrical Data of Pressure Gauges
Switching voltage
4.5 ... 24 V DC/AC
Switching current
5 ... 100 mA
Contact load
max. 2.4 W
Permissible temperature
-20 ºC to +60 ºC
Ingress protection
IP 65 acc. to EN 60529 / lEC 529
2.2.14. Discharge Nozzles
Discharge nozzles are used to uniformly distribute the IG-541 inert gas system. They are
performance tested to ensure that the agent is discharged within 60-120 seconds and properly
dispersed throughout the protected area.
IG-541 inert gas agent is distributed within the protected area by the discharge nozzle which is
sized to ensure the correct flow of agent for the risk. Nozzles are available with 180⁰ and 360⁰
discharge pattern. The 180⁰ nozzle is engineered to provide a 180⁰ discharge pattern for sidewall
applications. The 360⁰ nozzle offers a full 360⁰ discharge pattern for installations where nozzles are
located in the center of the hazard. Nozzles are supplied as standard in brass with BSPT female
thread. The agent flow is controlled by a calibrated diaphragm disc inside the nozzle body,
determined by the results from the hydraulic calculation software VdS approved. It guarantees a
homogenous
gas
distribution
throughout
the
volume.
1
1
Table 2.23. Discharge Nozzle Parts
2
2
No.
Description
1
Circlip for Diaphragm Disc Assembly
2
Diaphragm Disc
3
180/360 Degree Nozzle
3
1
Figure 2.21.: Discharge nozzles 180 degree & 360 degree
Honeywell Nexus IG-541 Inert Gas
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15 Apr 2024
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Table 2.24. Discharge Nozzles
Size
Type
Part Number
Type
Part Number
DN10 (3/8”)
HSN-NOZ-01-10
HSN-NOZ-02-10
DN15 (1/2”)
HSN-NOZ-01-15
HSN-NOZ-02-15
DN20 (3/4”)
HSN-NOZ-01-20
HSN-NOZ-02-20
DN25 (1”)
180 Degree
HSN-NOZ-01-25
360 Degree
HSN-NOZ-02-25
DN32 (11/4”)
HSN-NOZ-01-32
HSN-NOZ-02-32
DN40 (11/2”)
HSN-NOZ-01-40
HSN-NOZ-02-40
DN50 (2”)
HSN-NOZ-01-50
HSN-NOZ-02-50
2.2.15. Pilot Cylinders
The pilot cylinder is used for activating the slave cylinders in a selector valve system configuration.
It can be activated manually or electrically. Cylinders which sole purpose is to activate the
extinguishing system by supplying a pneumatic pressure. These cylinders can be placed remotely
and be of different types and styles.
Figure 2.22.: Pilot cylinder
Table 2.25. Pilot Cylinders
Part Number
Cylinder Size
Max. No. Of Cylinders
Max. Actuation Line
Length (m)
HSN-PLT-EU-SM-005
5L
20
25
HSN-PLT-EU-SM-013
13L
35
35
HSN-PLT-EU-SM-040
40L
50
45
IMPORTANT NOTICE: * The actuation internal diameter should be at least 6mm. When it is necessary to
place the pilot cylinder away from the main inert cylinder group, the diameter of the copper tube or other
activation line element that can be used as an alternative to the pilot hose must be at least 6 mm. The pressure
resistance of this tubing element must be at least 140 bar. The maximum activation line lengths specified in
the table related to the design of the pilot line shall be valid. The maximum activation line lengths include the
lengths of the pilot hoses.
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It’s possible to increase the maximum no. of 50 cylinders actuated by one master valve by using a
“bypass” to power up the actuation line after a specific no. of cylinders. There are two different
options for this bypass:
2.2.15.1.
Master Pilot Cylinder System
When it is necessary to use more than 10 Inert cylinders, activation with the master pilot cylinder
system is required. The solenoid actuator 24V DC is used in the master pilot cylinder system. Table
2.25. shall be taken as reference for system limitations.
Figure 2.23.: Master Pilot Cylinder System
2.2.15.2.
Booster Pilot Cylinder System
In systems with more than 50 cylinders, a booster pilot cylinder can be used as an alternative to
the 2nd master pilot cylinder. The pneumatic actuator is used in the booster pilot cylinder system.
Table 2.25. shall be taken as reference for system limitations.
IMPORTANT NOTICE: After a certain no. of 49 cylinders, you place a T-fitting inside the pilot line.
The additional connection will be connected with the pilot port (G1/8” slave valve port) of the prior cylinder
valve as shown below.
Figure 2.24.: Master & Booster pilot cylinders system
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2.2.16. Selector Directional Valves
Selector directional valves are used to protect multiple areas using a common cylinder bank. The
valves act as blocking devices directing the gas flow only in the compartment which requires the
system to be discharged. Selector Valves allow a single agent supply to be utilized for protection
of multiple hazards, reducing the total amount of agent and number of containers required.
When utilizing multiple containers to protect multiple hazards it is necessary to use selector valves
to divert the flow of agent into the activated hazard. The selector valves may be activated
electronically or manually by pneumatically connecting to the solenoid actuator provided with the
selector valve. The selector valve pneumatic actuator working pressure should be at least 6 bar
and maximum 10 bar. Where more than one zone is to be protected by a common Central Storage
Bank the selector valve is used to direct the agent flow into the appropriate zone. When designing
a system utilizing selector valves the designer must always calculate the largest zone of protection
when sizing the container bank. Selector valves are 2-way ball valves with bore and it is installed
in the discharge piping downstream of the extinguishant containers, to direct the extinguishant to
the appropriate hazard enclosure. Selector valve sizes range from 3/4” to 4” (20 to 100 mm
nominal).
L4
1
1
1
31
1
4d
11
f1d
1
5d
f11
d
ffd1
6d
dd
ff11
1
fd
dd
1
d
ff
d
dd
ff
d
d
f
d
21
L2
L3
Figure 2.25.: Selector valve
L1
Figure 2.26.: Composition of the selector valve
Table 2.26. Selector Valve Features
Honeywell Nexus IG-541 Inert Gas
Fire Extinguishing System Owner’s
Position
Designation
1
Limit switch box with optical indication
2
Wrench flats for manual actuation
3
Pneumatic connection
4
Actuator
5
Connecting shaft
6
Ball valve
P/N: HSN-MNL-IG541-R3
15 Apr 2024
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Table 2.27. Selector Valves Details
Part No
Size
L1
L2
L3
L4
HSN-SV-01-020
DN20
189
95
49
108
HSN-SV-01-025
DN25
189
113
58
108
HSN-SV-01-032
DN32
231
111
81
133
HSN-SV-01-040
DN40
257
130
100
154
HSN-SV-01-050
DN50
257
140
118
154
HSN-SV-01-065
DN63
334
150
208
161
HSN-SV-01-080
DN80
374
170
258
182
HSN-SV-01-100
DN100
519
200
260
242
Table 2.28. Selector Valves
Part Number
Description
Thread Type
HSN-SV-01-020
3/4" Selector Valve
BSP Threaded
HSN-SV-01-025
1" Selector Valve
BSP Threaded
HSN-SV-01-032
11/4" Selector Valve
BSP Threaded
HSN-SV-01-040
11/2" Selector Valve
BSP Threaded
HSN-SV-01-050
2" Selector Valve
BSP Threaded
HSN-SV-01-065
21/2" Selector Valve
ISO Flanged
HSN-SV-01-080
3" Selector Valve
ISO Flanged
HSN-SV-01-100
4" Selector Valve
ISO Flanged
To The Inert Gas Cylinder
From The Pilot Cylinder
Figure 2.27.: Selector valve system details
Figure 2.28.: Selector valve completer kit details
Table 2.29. Selector Valves Limitation
Part Number
HSN-SV-01-020/100
Honeywell Nexus IG-541 Inert Gas
Fire Extinguishing System Owner’s
Size
Max. No. of Selector
Max. Actuation Pilot
Valves
Line Length (m)
**
45
3/4" to 4"
P/N: HSN-MNL-IG541-R3
15 Apr 2024
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IMPORTANT NOTICE: ** The limitation of selector valve quantity is related to pilot line length and design.
The selector valve pneumatic actuator working pressure should be at least 6 bar
and maximum 10 bar.
2.2.17. Pilot Line Non-Return Valve (P/N: HSN-NRV-01)
The Non-return Valve kits are used in the Selector Valve pneumatic actuation line. The correct
placement of these kits within the actuation lines ensures that the required numbers of cylinders
from a central bank are operated. The kits also protect against unwanted back pressure within
the actuation line. The design of the Non-return Valve is such that it can be mounted in any
orientation and does not require any maintenance.
Figure 2.29.: Non-return valve
2
1
1
2
Table 2.30. Non-Return Valve
No.
Description
1
Inlet Thread, G1/8” EN ISO228
2
Outlet Thread, G1/8” EN ISO228
Figure 2.30.: Dimensions of Non-return valve
Table 2.31. Technical Data of Non-Return Valve
Nominal width
4mm (12,57mm²)
Maximum pressure PW max
360 Bar
Temperature range
20 ºC to +65 ºC
Material valve body
Stainless Steel
Gasket materials
Gasket materials must be compatible with used gases
2.2.18. Constant Pressure Regulator Valve (P/N: HSN-CPR-10)
The Constant-pressure-regulator is intended for use as a pressure reducing device in fixed
automatic fire suppression systems using inert gas agents.
Figure 2.31.: Constant pressure regulator valve
Honeywell Nexus IG-541 Inert Gas
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IMPORTANT NOTICE: Pressure regulators are not assumed to be so called safety accessories in terms of
directive 2014/68/EU of the European Parliament (“Pressure Equipment Directive”). Therefore usage of
pressure regulators type HSN-CPR-10 does not supersede the installation of appropriate safety equipment
to prevent components mounted to the outlet of the regulator from being over pressurized. In particular, but
not exclusively, this refers to piping, fittings, selector valves and nozzles.
The regulator must be installed directly to the cylinder valve and the outlet has to be connected
to a suitable manifold by a hose.
Table 2.32. Constant Pressure Regulator Valve
11
2
No.
Description
1
1
1
1
Inlet Thread, W21,8X1/14” DIN 477, Female
d
d
2
Outlet Thread, W21,8X1/14” DIN 477, Male
f
f
3
L = 145mm, Ø64mm
d
L
d
f
f
d Figure 2.32.: Dimensions of constant pressure regulator valve
d
Table 2.33. Technical Data of Constant Pressure Regulator Valve
Nominal size
12mm
Permissible pressure at inlet
Max.360 Bar
Outlet pressure
60bar (+2/-6 bar) (static) - max. 60bar (dynamic)
Temperature range TS
-20 ºC to +50 ºC
Body parts: brass, stainless steel
Materials
Gasket parts: EPDM, PUR, PA
Mounting torque (inlet & outlet)
55Nm ±5
Smallest allowed nozzle diameter at outlet
Ø 3mm
The component must be screwed onto the outlet of the cylinder valve via the inlet connection thread. A flex
hose must be connected to the regulator outlet by screwing on its swivel nut. The other end of the hose
must be properly connected to the extinguishing system.
Figure 2.33.: Assemblies of constant pressure regulator valve
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2.2.19. Pressure Reducer (P/N: HSN-PRD-01)
The pressure reducer can automatically relieve pressure in the pilot line. A close section of pipe
requires a safety valve between the pilot cylinder and the pneumatic actuator of selector valves. It
must be used only for selector valve systems. The set point is 8 bar and PW max: 100 bar.
Pressure reducer is suitable with N2 gas and N2 gas inlet pressure should be max 100 bar.
Pressure reducer will be setted 8 bar at the factory, it is not possible to change the set pressure
in the field.
2.2.20. Manifold Pressure Safety Valve (P/N: HSN-PSV-01)
The pressure safety valve can automatically relieve pressure in the pipework system or manifold.
A close section of pipe requires a safety valve between the container valves and selector valves.
It must be used only for selector valve systems. The set point is 100 bar and PW max: 1500 bar.
2.2.21. Vent Valve (P/N: HSN-VV-01)
It is used to vent the air fills the actuator of the selector valve. And therefore, allows the valve to
return to the its first position. It should be used for the selector valve systems. PW max: 360 bar.
2.2.22. Label (P/N: HSN-LBL-IG541)
Figure 2.34.: Label for IG-541
Honeywell Nexus IG-541 Inert Gas
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Figure 2.35.: Label for pilot cylinder
2.2.23. Caution Signs
Figure 2.36.: Caution signs
Table 2.34. Caution Signs
Description
Part Number
Protected Room Caution Sign
HSN-CS-IG541-01
Manual Release Point Caution Sign
HSN-CS-MRP-01
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3.
3.1.
Other Accessories
Pilot Cylinders (ATEX)
The pilot cylinder is used for activating the slave cylinders in a selector valve system configuration.
It can be activated manually or electrically. The electrical activation can be ATEX solenoid
actuator.
Table 3.1. Pilot Cylinder (ATEX)
No.
Description
1
Pilot valve
2
Solenoid actuator
3
Manual actuator
4
Pressure gauge
Figure 3.1: Typical ATEX pilot cylinder & valve assembly
Table 3.2. Pilot Cylinders (ATEX) Details
Part Number
Cylinder Size
Max. No. Of Cylinders
Max. Actuation Line
Length (m)
HSN-PLTA-EU-SM-005
5L
20
25
HSN-PLTA-EU-SM-013
13L
35
35
HSN-PLTA-EU-SM-040
40L
50
45
IMPORTANT NOTICE: * The actuation internal diameter should be at least 6mm. When it is necessary to
place the pilot cylinder away from the main inert cylinder group, the diameter of the copper tube or other
activation line element that can be used as an alternative to the pilot hose must be at least 6 mm. The pressure
resistance of this tubing element must be at least 140 bar. The maximum activation line lengths specified in
the table related to the design of the pilot line shall be valid. The maximum activation line lengths include the
lengths of the pilot hoses.
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4.
4.1.
System Design
Introduction
There are two main elements of system design. The first is the risk assessment, determining the
type of protection required, considerations such as ventilation, openings and restrictions,
equipment location etc. The second is calculating the quantity of IG-541 clean agent required,
including floor and / or ceiling voids, positioning of nozzles, electrical requirements, etc. The system
design is based on the requirements of EN15004-1 & EN15004-10 (current edition).
4.1.1. Hazard Analysis
The following steps must be taken to design IG-541 inert gas system.
1. Perform a hazard analysis of protected area.
2. Determine the class of fire hazards.
3. Determine the minimum and maximum ambient temperature for the hazard.
4. Calculate IG-541 agent quantity to provide required design concentration at minimum expected
ambient temperature in protected area. Calculate the quantity of IG-541 inert gas required to
provide the proper design concentration at the minimum expected hazard temperature.
All system design calculations are calculated at minimum design concentration to determine IG541 agent quantity. Agent quantity shall be adjusted if system is installed at altitudes > 1000m. If
hazard altitude is not listed in the table, find the altitude next lower than the hazard altitude and
determine the correction factor. See following to the altitude correction factor.
Table 4.1. Altitude Correction Factors
Altitude (m)
-1000
Sea Level
1000
1500
2000
2500
3000
3500
4000
4500
Correction Factor
1.130
1.000
0.885
0.830
0.785
0.735
0.690
0.650
0.610
0.565
Maximum design concentration should be at the maximum anticipated enclosure temperature, for
comparison see NOAEL / LOAEL values.
IG-541 inert gas fire extinguishing system is suitable for use with the following materials.
Surface Class A: Fires involving solid materials usually of an organic nature, in which combustion
normally takes place with the formation of glowing embers.
Class B: Fires involving flammable liquids or liquefiable solids and flammable gases.
Higher Hazard Class A: Fires involving energized electrical equipment where the electrical no
conductivity of the extinguishing media is of importance.
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Table 4.2. IG-541 reference extinguishing and design concentrations
Fuel
Class B
Extinguishment
Minimum design
% by volume
% by volume
31.7
Heptane (cup burner)
37.0
Heptane (room test)
48.1
Surface Class A
Wood crib
28.2
PMMA
30.7
PP
30.6
ABS
30.7
Higher Hazard Class A
a
39.9
45.7
The extinguishment values for the Class B and the Surface Class A fuels are determined by testing in accordance with
EN 15004-1:2008, Annexes B and C. The minimum design concentration for the Class B fuel is the higher value of the
heptane cup burner or room test heptane extinguishment concentration multiplied by 1,3. The minimum design
concentration for Surface Class A fuel is the highest value of the wood crib, PMMA, PP or ABS extinguishment
concentrations multiplied by 1,3. In the absence of any of the 4 extinguishment values, the minimum design
concentration for Surface Class A shall be that of Higher Hazard Class A. See EN 15004-1:2008, 7.5.1.3, for guidance
on Class A fuels. The extinguishing and design concentrations for room-scale test fires are for informational purposes
only. Lower and higher extinguishing concentrations than those shown for room-scale test fires may be achieved and
allowed when validated by test reports from İnternationally recognized laboratories
a
The minimum design concentration for Higher Hazard Class A fuels shall be the higher of the Surface Class A or 95 %
of the Class B minimum design concentration.
Reference: EN15004-10, Table 4 — IG-541 reference extinguishing and design concentrations
4.1.2. Determine which components are required
Cylinder volume, quantity and fill requirements. Refer to Table 2.2
Cylinder framing, mounting brackets, etc.
Detection and control equipment required.
Other system requirements, such as reserve supply, pressure switches, etc.
4.1.3. Positioning of cylinders
• Locate cylinders based on the following: Number of cylinders required.
• Storage temperature/environmental considerations, such as weather, area classification and
corrosive environment.
• Floor loading.
4.1.4. Positioning of piping
• Nozzle location.
• Structural members for bracing the pipe.
4.1.5. Pipe size and layout
• Draw piping isometric.
• Dimensions of all pipe sections.
• Locate all fittings.
• Note all elevation changes. The preceding information will be entered into the computer program.
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4.1.6. Manifolds
It may be necessary to manifold agent containers to provide the required amount of agent for a
hazard or to make available the proper increments of agent weight for the protection of multiple
hazards. Whenever containers are manifolded, the following rules must be observed.
1. All containers connected to the same manifold or pipe must be the same size and filled with the
same agent weight, pressure and fill density.
2. Agent containers must be located in a single row and spaced according to section.
3. A connected reserve may be employed in some circumstances providing a secondary supply of
agent.
4. Flexible discharge hoses and check valves must be used at each inlet.
Figure 4.1: Manifold details
IMPORTANT NOTICE:
Manifold available working pressure have to be at least 100 bar (1450 psi). Class 150 and cast-iron fittings
must not be used. Manifolds have to be tested at 1.5 times of available working pressure.
4.1.7.
Super-pressurization
Containers for IG-541 are not super-pressurized.
4.1.8. Design criteria
The complexity of two-phase flow formulas does not allow for any simple method of manual
calculation. For this reason, the flow calculations and design criteria described in this manual have
been programmed into a computer software program. To determine the proper procedures for
applying the input parameters to the IG-541 inert gas system computer program. There are a
number of limitations to these input parameters which must be observed if accurate results are to
be obtained. Most of these limitations are in the program. However, there are certain restrictions
that must be addressed by the system designer before applying the input data.
4.1.9. Design example and calculations
Minimum agent quantity is based on the hazard volume at the minimum anticipated temperature
and concentration required. To determine the minimum agent quantity the following equation is
used:
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𝑽
𝟏𝟎𝟎
m = 𝑺 xln(𝟏𝟎𝟎−𝒄)xCAlt [kg]
m = Required Agent Quantity (m3)
V = Hazard Net Volume (m3) (the enclosed volume minus the fixed structures imperious to the ext.)
CAlt = Altitude Correction Factor (see Table 3.1)
C = Required IG-541 concentration. (% by volume)
SR = k1 + k2xTR
S = k1 + k2xT
SR= Specific Reference Volume @ 20 ⁰C [0.65799 + (0.002239x20) = 0.70277 (m3/kg)]
S = Specific Volume (m3/kg)
T = 20 ⁰C Design temperature in Hazard Area (⁰C)
TR = Reference temperature (⁰C)
Calculation for two rooms and floor void with the following dimensions:
Switch Room: 3.5m x 3.0m x 3.0m = 31.50m3
Computer Room: 7.0m x 6.0m x 3.0m = 126.00m3
Floor Void: 7.0m x 6.0m x 0.30m = 12.60m3
Altitude (Sea Level) = 1.000 for calculation example
Switch Room: (45.2 % required design concentration example only)
m:
31.5
0.70277
100
xln(100−45.2)x1 = 26.96 kg
Computer Room: (45.2 % required design concentration example only)
m:
126.0
100
xln(100−45.2)x1 = 107.84 kg
0.70277
Floor Void: (45.2 % required design concentration example only)
m:
12.6
0.70277
100
xln(100−45.2)x1 = 10.78 kg
Q R = m x SR
QRswitch= 26.96 x (0.65799 + (0.002239x20)) = 18.95 m3
QRcomputer= 107.84 x (0.65799 + (0.002239x20) = 75.78 m3
QRFloor= 10.78 x (0.65799 + (0.002239x20) = 7.57 m3
It is determined from the above that both the Switch Room and the Computer Room can be fed by
one manifolded system using 5 x 80L IG-541 containers, each filled with 19.00 m3 of inert gas. The
Floor Void would use 1 x 40L IG-541 container filled with 7.60 m3. (According to the Table 1.7. Agent
Container Fill Quantity for 300Bar)
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Figure 4.2: Example of system
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Table 4.3. IG-541 total flooding quantity
Temperature
Specific
IG-541 Volume Requirements per Unit Volume of Protected Space V/V (m3/m3)
T
Vapor
This information refers only IG-541, and may not represent any other products
⁰C
Volume
containing nitrogen and argon as a component
3
Design Concentrations (% - by volume)
S, (m /kg)
34,0
38,0
39,9
42,0
45,7
46,0
48,1
50,0
54,0
58,0
62,0
-20
0,6102
0,481
0,554
0,588
0,631
0,706
0,714
0,758
0,803
0,899
1,005
1,120
-15
0,6221
0,472
0,543
0,577
0,619
0,692
0,700
0,744
0,787
0,882
0,985
1,099
-10
0,6341
0,463
0,533
0,566
0,607
0,679
0,686
0,730
0,772
0,865
0,966
1,078
-5
0,6460
0,454
0,523
0,556
0,596
0,667
0,674
0,716
0,758
0,849
0,948
1,058
0
0,6580
0,446
0,513
0,546
0,585
0,665
0,661
0,703
0,744
0,833
0,931
1,038
5
0,6699
0,438
0,504
0,536
0,574
0,643
0,649
0,690
0,731
0,818
0,914
1,020
10
0,6819
0,430
0,495
0,527
0,564
0,632
0,638
0,678
0,718
0,804
0,898
1,002
15
0,6938
0,423
0,486
0,517
0,554
0,6211
0,627
0,667
0,705
0,790
0,883
0,984
20
0,7058
0,416
0,478
0,509
0,545
0,610
0,616
0,655
0,693
0,777
0,868
0,968
25
0,7177
0,409
0,470
0,500
0,536
0,600
0,606
0,644
0,682
0,764
0,853
0,951
30
0,7297
0,402
0,462
0,492
0,527
0,590
0,596
0,634
0,670
0,751
0,839
0,936
35
0,7416
0,395
0,455
0,484
0,518
0,581
0,586
0,624
0,659
0,739
0,825
0,920
40
0,7536
0,389
0,448
0,476
0,510
0,571
0,577
0,614
0,649
0,727
0,812
0,906
45
0,7655
0,383
0,440
0,469
0,502
0,562
0,568
0,604
0,639
0,716
0,799
0,892
50
0,7775
0,377
0,434
0,462
0,494
0,554
0,559
0,595
0,629
0,704
0,787
0,878
55
0,7894
0,371
0,427
0,452
0,487
0,545
0,550
0,586
0,619
0,694
0,775
0,864
60
0,8014
0,366
0,421
0,448
0,479
0,537
0,542
0,577
0,610
0,683
0,763
0,851
65
0,8133
0,360
0,414
0,441
0,472
0,529
0,534
0,569
0,601
0,673
0,752
0,839
70
0,8253
0,355
0,408
0,435
0,465
0,522
0,526
0,560
0,592
0,663
0,741
0,827
75
0,8372
0,350
0,403
0,429
0,459
0,514
0,519
0,552
0,584
0,654
0,730
0,815
80
0,8492
0,345
0,397
0,432
0,452
0,507
0,511
0,545
0,575
0,645
0,720
0,803
85
0,8611
0,340
0,391
0,417
0,446
0,500
0,504
0,537
0,567
0,636
0,710
0,792
90
0,8731
0,335
0,386
0,411
0,442
0,493
0,597
0,530
0,560
0,627
0,700
0,781
V/V is the agent volume requirement (in cubic meters per cubic meter); i.e. the quantity Q (in cubic meters) of agent required at a
reference temperature of 20 °C and a pressure of 1,013 bar per cubic meter of protected volume to produce the indicated
concentration at the temperature specified: QR = m⋅ SR
where; SR is the specific reference volume (in cubic meters per kilogram); i.e. the specific vapour volume at the filling reference
temperature for superheated IG-541 vapor at a pressure of 1,013 bar which may be approximated by the formula: SR = k1 + k2 ⋅TR
where k1 = 0,65799; k2 = 0,002239; TR is the reference temperature (in degrees Celsius); i.e. filling temperature (20 °C in the
table)
m = V/S xln(100/(100-c))
V is the net volume of hazard (in cubic meters); i.e. the enclosed volume minus the fixed structures impervious to extinguishant.
T is the temperature (in degrees Celsius); i.e. the design temperature in the hazard area.
S is the specific volume (in cubic meters per kilogram); the specific volume of superheated IG-541 vapour at a pressure of 1,013
bar may be approximated by S = k1 + k2 ⋅T
c is the concentration (in percent); i.e. the volumetric concentration of IG-541 in air at the temperature indicated, and a pressure
of 1,013 bar absolute.
4.1.10. Duration of discharge
The inert gases do not produce any decomposition products, the gas is discharged over longer
time, but in such a way that the extinguishing concentration is reached within 60-120 seconds.
And 95% of the minimum design concentration shall be achieved within the discharge times listed
below.
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Table 4.4. Discharge time for inert gases
Discharge Time
ISO 14520
EN 15004
NFPA 2001
VdS 2380
2015 Edition
2019 Edition
2018 Edition
2016-06
Class A
120 seconds
120 seconds
120 seconds
120 seconds
Class B
60 seconds
60 seconds
60 seconds
60 seconds
Class C
60 seconds
60 seconds
120 seconds
60 seconds
IMPORTANT NOTICE: The discharge time required to achieve 95 % of the design concentration shall not
exceed the given values, or as otherwise required by the authority.
4.1.11. Room Integrity and Pressure Ventilation
The designer of a fire suppression system should be aware that the discharge of any gaseous
extinguishing agent into an enclosure will change the pressure within that enclosure. This could
affect the structural integrity of the enclosure.
In considering room integrity, the designer should consider that the discharge of any gaseous
suppression agent into an enclosure gives rise to a change in the pressure within that enclosure.
Under some conditions, this could affect the structural integrity of the enclosure.
In some cases, the protected enclosure requires a pressure relief device and in all cases the
customer must be made aware of the pressurization level expected, from calculation, within the
enclosure.
The natural leakiness of the enclosure may form the basis for these calculations, but that can
only be accurately assessed with the room integrity test equipment. When conducting this test,
look for the minimum amount of leakage and not the maximum amount of leakage, as required
with a standard room integrity test. The two tests differ as the doors surrounding the protected
room are left closed, as opposed to being held open during a standard room integrity test.
Fire suppression systems that use inert gas extinguish fires by reducing the level of oxygen to a
point where combustion of the flammables cannot be maintained. The amount of gas discharged
into the hazard results in a positive pressure, which displaces the air from the room. Suitable
means of pressure relief/vent shall always be employed to avoid structural damage to the
building and equipment.
To avoid personal and property damage, the fire and IG-541 released by the pressure relief device
must not result in a hazard outside the extinguishing zone.
For this reason, the pressure relief/vent should always be directed to free air. Although ‘cascade’
venting may be required in certain circumstances.
If a duct cannot be avoided, the duct must be gas tight, and should lead directly into the open.
The duct must be designed to make sure that during pressure relief the fire is not allowed to
spread into other hazards or areas.
The pressure relief device shall close after completed pressure relief. Preferably the pressure
relief device should be equipped with its own power source and should be able to open and close
automatically. Pressure relief devices, which depend on an external power supply, shall be
triggered directly by the extinguishing system and shall be energized by the extinguishing system.
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(Preferably with non-electric energy) If electrically triggered pressure relief devices are used, the
guidelines for triggering the extinguishing system shall be observed.
If pressure relief takes place through a vent, or if ducted directly into free air, and there is no
requirement for a fire-resistant segregation of the perimeter walls containing the pressure relief
vent; louvered shutters can be used opening as a result of the over pressure, closing by their own
weight or via springs at a certain overpressure in the room.
If requirements in terms of structural segregation must be observed, the pressure relief device
shall be designed accordingly.
The pressure relief vent shall be installed to make sure that it is not positioned in the immediate
discharge area of the nozzles.
Pressure relief must not be provided in form of active exhaust suction devices.
Each separate space within the flooded zone must be equipped with its own pressure relief vent
device. The pressure relief device must be sufficiently dimensioned taking into account the
allowable overpressure in the room, the mass flow during the release and the type of pressure
relief device to be used. (Drag coefficient of the vent, pressure drop in duct, etc.).
If the pressure relief vent is provided in form of a duct arrangement, the pressure drop of the duct
must be calculated additionally and must be considered when dimensioning the cross-sectional
surface of the vent. A duct shall always be suitable for taking the applied pressure and the gas
flow. No enclosure is 100% tight; a certain amount of leakage to adjacent areas is to be
anticipated during and following an IG-541 discharge.
Pressure relief vents shall be installed by a qualified ventilating company.
IMPORTANT NOTICE: It is the customer’s responsibility to determine the enclosure strength and not the
fire protection system supplier. The customer must advise the allowable pressure differential that the
enclosure can withstand without sustaining damage. If the customer does not communicate the allowable
pressure that the enclosure can withstand, obtain the customer’s acceptance of the proposed figures used.
To estimate the free venting area, use the following formula:
A:
MxSIG−541
√PxSH
&
SH:
CxSIG−541
100
+(
100−C
100
)x SAIR
Where:
A = Is the total vent area (square meters)
M = Is the mass flow of extinguishant (kgs/second)
SIG-541 = Is the specific vapor volume of extinguishant (cubic meters/kg)
P = Is the maximum room strength (pascals)
SH = Is the specific vapor volume of the homogenous mix (cubic meters/kg)
C = Is the design concentration (%)
SAIR = Is the specific vapor volume of air given by:
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SAIR = 0.65799 + 0.002239xT
T = is the temperature in degrees C
IMPORTANT NOTICE: This calculation is for estimation purposes only. The final free vent area must be
calculated by using hydraulic flow calculation software.
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5.
5.1.
Installation
General Equipment Installation
IG-541 inert gas fire extinguishing system must be installed to facilitate proper inspection, testing,
manual operation, recharging and any other required maintenance as may be necessary.
Equipment must not be subject to severe weather conditions or mechanical, chemical or other
damage that could render the equipment inoperative. Equipment must be installed in accordance
with EN15004-1 (current edition).
5.2.
Order of Installation
• Container / cylinder installation
• Piping and nozzles
• Actuation controls
• Ancillary equipment
• Completion procedures
Specific installation drawings must be prepared for the hazard area in accordance with system
design as calculated by the IG-541 hydraulic flow program. These drawings should be followed
closely in order to ensure the system meets its design criteria. The pipe network is sized in order
to obtain correct discharge time, nozzle pressures, agent quantity and various other design
considerations. If for any reason, the pipe network requires. Modifications the system must be
recalculated before proceeding with installation. Installation drawings contain the following
information.
• Enclosure volumes
• Agent quantities
• Scaled pipe network plan
• Pipe network isometric
• Pipe diameters, pipe length drops and rises
• Nozzle data
• Container / cylinder data
• Actuator technical data
• Low pressure switch wiring chart
• Fittings data
Installation drawings shall be submitted for approval to the appropriate authority prior to system
installation. The container weight is checked at the factory prior to dispatch and recorded on the
label attached to the container. If there is any doubt regarding the weight, or leakage is suspected,
the container should be weighed to confirm there is no weight loss.
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5.2.1. Container installation
The container location is identified on the system drawings and should be protected from extremes
of temperature and be accessible for service and maintenance. The containers must be installed
vertically on the floor and firmly secured to a wall or bulkhead. No safety outlet and actuation caps
should be removed at this stage.
5.2.1.1.
Single container installation
1. Fix the back channels of the mounting brackets to the wall at the appropriate heights using
suitable anchor type bolts.
2. Position the container against the back channel with the valve outlet pointing left.
3. Insert the container straps at top and bottom and secure with the bolts.
4. Remove the safety outlet cap from the valve outlet adaptor.
5. With the outlet cap removed from the valve outlet adaptor, connect flexible discharge hose or
valve outlet adapter.
6. Remove the protection cap from the cylinder valve actuation port.
7. Install the manual and solenoid actuator to the cylinder valve actuation port.
Figure 5.1: Single container assembly
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5.2.1.2.
Multiple container installation
Containers are manifolded together for three main reasons:
• To reduce the amount of piping required by connection to one feeder pipe.
• For systems that require main and reserve system configuration.
• Combining the correct containers to obtain the required quantity of agent within a specific hazard
area.
1. Fix the back channels of the mounting brackets to the wall at the appropriate heights using
suitable anchor type bolts. (see Figure 5.2)
2. Position the containers against the back channels with the valve outlets pointing left at the
required spacing for the manifold ports. (see Figure 5.3)
3. Insert the container straps at top and bottom and secure with the nut bolts. (see Figure 5.3)
4. Remove the safety cap from one cylinder outlet port and connect the flexible discharge hose to
the cylinder outlet port. (see Figure 5.4 and 5.5)
5. Remove the protection caps from the cylinder actuation ports. (see Figure 5.5)
6. Install the manual, solenoid and pneumatic actuators to the cylinder valve actuation ports. (see
Figure 5.5 and 5.6)
Figure 5.2: Manifold and strap assembly for multiple container
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Figure 5.3.: Cylinder assembly with cylinder protection cap
Figure 5.4.: Cylinder assembly after removing cylinder protection cap
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Figure 5.5.: Discharge and actuation line assembly for multiple container
Figure 5.6.: Assembly of discharge hose & check valve with container
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A
B
C
D
Figure 5.7.: Multiple cylinder installation dimension
Table 5.1. Multiple cylinder installation dimensions
Type
A (mm)
B (mm)
C (mm)*
D (mm)
E (mm)
80L
375
1335
2188
300
350
140L
325
1225
2067
400
436
*These can change according to manifold dimension and discharge hose length.
5.2.2. Pipe installation
In general, the installation should commence at the union elbow/manifold assembly and progress
along to the discharge nozzles. Install the pipework to the installation drawings provided, ensuring
that the following is adhered to:
1. The piping material must conform to the requirements of EN15004-1 / Sec 6.3.2.
2. The pipe must be reamed, blown clear and swabbed with an appropriate solvent to remove mill
varnish and cutting oil before assembly.
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5.2.2.1.
Pipe and fittings system
The pipe system is used for distributing the IG-541 to the protected enclosures. Typically the pipe
is EN10220/10217 P235TR1, rated for the applicable working pressure (standard 80bar) and has
material Charpy V test performed at -40°C. Typically the fittings are EN 10242/ 10226/ 1562 with
special requirement per VdS standard.
Fittings are type tested to 30MPa (300bar) and marked with a red dot and the letter “D” stamped
into it. Fittings are suitable for use in installations with clean agent fire extinguishing systems and
the low temperature generated during discharge of such system.
Pipes to ASTM Sch40, 80, 160 may also be used.
Fittings ASME 3000lb and above may also be used.
Pipes should be threaded and screwed or welded. If other type of assembly is used, the
manufacturer of the pipe components must declare that it is suitable for use in fire suppression
system using inert gas (here taken into consideration pressure and temperature during use and
discharge). Pipes and fittings may be Black, Galvanized or Stainless steel.
IMPORTANT NOTICE:
Cast iron or seamed steel and non-metallic pipes shall not be used.
5.2.2.2.
Pipe hangers & fasteners
All fasteners used must be of good quality and made from material suitable for the environment
they are being used in. Installation hardware for the pipe system must be able to support the pipe
system as well as the forces from nozzles during the discharge.
General requirements are:
Pipe must be allowed to move within the brackets due to length contraction during discharge due
to the temperature change. If the temperature rises from +20°C to +200°C, the ultimate tensile
strength of the material used shall not be reduced by more than 25%. Combustible materials shall
not be used.
Pipe supports shall be designed so that under extreme load there is no danger of the installation
being damaged. Pipe brackets shall completely surround the pipe and be closed. The material from
which a pipe support is manufactured shall be at least 3mm thick. If galvanized, a thickness of
2,5mm will suffice. This does not, however, apply to a pipe support made from hot-dip galvanized
material, which may have a minimum size of 25mm x 1,5mm for pipes up to DN50 (12mm x 1,5mm,
if type approved).
Pipe supports shall connect the pipe work directly to the building structure. Building members, to
which primary supports are attached, shall be strong enough to carry the load. If not, additional
links to load-bearing members shall be created.
5.2.2.3.
Installation of pipe and fittings
Pipe and fittings must be installed in strict accordance with the system drawings and good
commercial practices. The piping between the cylinder and the nozzles must be the shortest route
possible, with a minimum of fittings. Any deviations in the routing or number of fittings must be
approved by the design engineer before installation. Piping must be reamed free of burrs and ridges
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after cutting, welding or threading. Joint compound or thread tape must be applied only to the male
threads of the joint, excluding the first two threads. All piping must be blown clear with dry nitrogen
or compressed air before installing the discharge nozzles.
5.2.2.4.
Piping support installation
Pipe supports shall be of a non-combustible material, shall be suitable for the expected
temperature and shall be able to withstand the dynamic and static forces involved. Due allowance
shall be made for the stresses induced in the pipe work by temperature variations (From -20 °C to
+50 °C). Adequate environmental protection shall be given to supports and associated steelwork.
The distance between pipe supports shall be as the following table:
Table 5.2. Maximum pipework support distance
Pipe Diameter
Max. Distance (m)
Pipe Diameter
Max. Distance (m)
10mm (3/8”)
1.0
50mm (2”)
3.4
15mm (1/2”)
1.5
65mm (21/2”)
3.5
20mm (3/4”)
1.8
80mm (3”)
3.7
25mm (1”)
2.1
100mm (4”)
4.3
32mm (11/4”)
2.4
125mm (5”)
4.8
40mm (11/2”)
2.7
150mm (6”)
5.2
Reference: EN15004-1 Sec 6.3.4 Table-4
5.2.3. Master / slave cylinder installation
1. Position the cylinder in designated location and secure in place with cylinder strap and attaching
hardware (see Figure 5.2 and Table 5.1) Orient cylinder with valve outlet angled toward system
piping.
2. Remove the safety cap from the cylinder valve outlet port.
3. Connect a flexible discharge hose or valve outlet adapter to the cylinder outlet port.
4. Install the master / slave cylinder actuator kit.
5. Remove the protection cap from the cylinder valve actuation port.
6. Install pneumatic actuator and actuation line hose; do not attach solenoid actuator to slave
cylinder valve actuation port at this time.
7. Install solenoid actuator and actuation line hose to slave cylinder.
Figure 5.8.: Assembly of actuation line with master and slave containers
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5.2.4. Installation of pressure switch
Pressure switches must be connected to the discharge manifold or piping in an upright position.
Pressure switches have DN15 (1/2") BSP pressure inlets to connect to the system piping.
Figure 5.9.: Typical discharge pressure switch assembly on manifold or/and single cylinder
5.2.5. Installation of nozzles
Nozzle type, style, and orifice diameter are determined based upon flow calculations made by the
IG-541 inert gas flow software during the system design. Discharge nozzles are female BSP thread.
Due to the thrust generated from a 180° corner or 360° sidewall nozzle, a rigid hanger or support
must be located within 300mm (12") of the nozzle to prevent pipe movement and / or nozzle rotation
during discharge.
5.2.6. Discharge piping pressure test
All fittings be checked for tightness and pressure tested. Remove the nozzles and install pipe caps.
Remove the discharge piping from the cylinder valve and install the safety cape onto the cylinder
discharge outlet. Connect a source of dry compressed air or nitrogen to the distribution piping.
Slowly increase the pressure in the piping to 3 Bar (43.5 psi) and then close the valve supplying
pressure. Check the pressure after 10 minutes. If the pressure is above 2.7 Bar (39.2 psi) (80 % of
test pressure) the system is considered sealed. If it drops below 2.7 Bar (39.2 psi) check and tighten
all fittings then re-run the test. After completing the test remove pipe caps, reinstall nozzles, and
reconnect discharge piping to cylinder.
Dry compressed air or nitrogen must be discharged through the piping network and nozzles to verify
the flow is continuous and that the piping and nozzles are unobstructed. Make certain air/nitrogen
is discharging from all nozzles. Check all nozzles to be sure the correct nozzles are installed as
shown on the installation drawing, installed securely to the pipe, properly anchored, and properly
oriented. Check all nozzles for any obstructions or objects placed in the direct pattern of discharge.
EN15004-1 / Sec 8.2.3 should be taken into account in all other matters not specified.
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Perform a full functional test of the control system in accordance with the appropriate technical
manual and system design drawings including verification that all control functions such as damper
and door closure, HVAC shut down, and power shut down occur as intended. If the HVAC is not
being shutdown prior to system discharge it must be of the re-circulating close loop type and
enough agent must be provided to compensate for the volume of the duct and plenum.
5.2.7. Hand-over procedures
The entire system shall be thoroughly inspected to make sure that it is complete and that all tests
required during installation have been properly carried out. EN15004-1 should also be consulted.
Additional procedures may be required by the local Authority Having Jurisdiction (AHJ). In addition,
the following items are particularly important.
1. Conduct a room integrity (door fan) test in accordance with EN15004-1. The results of this test
will provide equivalent leakage area and, when conducted in accordance with the manufacturer’s
instructions, will predict the timeline for a descending interface to fall to a given height and estimate
how long the extinguishing concentration will be maintained in the protected room.
2. A container should be refilled or replaced when it shows a loss in agent quantity of more than 5
% or loss in pressure (please refer to the pressure temperature chart) of more than 10 %.
3. Check security and tightness of cylinder mounting brackets to a solid structure and cylinder
bracket straps.
4. Piping should be checked for correct size, length, and grade and compared to the installation
drawings, IG-541 inert gas flow calculation results, and manual limitations.
5. Check pipe supports for proper type, mounting, and spacing.
6. Check that nozzle location, size, and drill diameters of orifices match both installation / design
drawings and calculations.
7. Check the container weight information label according to the system requirement. If there is
any doubt or loss of pressure, the container must be weighed.
8. Ensure that the system is in operation and that the operating systems are functioning.
Ensure that adequate escape routes are provided with directional signs. Issuance of appropriate
documentation will mean that the handover procedure has been completed. Appropriate records
will be issued by firefighting teams or area by insurance authorities on the hazard suitability,
acceptability and availability of the system.
5.2.8. Warning notification
Appropriate warning notices should be affixed inside protected room informing its occupants about
the type of protection and modes of actuation in case of fire. All these signs should be clearly legible
and resistant to environmental conditions. It is advisable to provide adhesive labels in red or green
background and white letters. Notices should incorporate at least the following messages:
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Typical sign inside the protected enclosure:
CAUTION
AREA PROTECTED WITH FIRE EXTINGUISHING SYSTEM. WHEN
ALARM SOUNDS EVACUATE THE AREA
Typical sign outside the protected enclosure:
CAUTION
AREA PROTECTED WITH FIRE EXTINGUISHING SYSTEM. WHEN
ALARM SOUNDS DO NOT ENTER UNTIL AREA VENTILATED
Typical sign affixed near the protected areas:
CAUTION
THIS AREA IS PROTECTED BY FIRE EXTINGUISHING SYSTEM.
UPON DISCHARGE, AN UNBREATHABLE ATMOSPHERE MAY BE
PRODUCED IN THIS AREA. WHEN ALARM SOUNDS OR UPON
GAS DISCHARGE
Typical signs placed at every manual actuation device:
CAUTION
THE RELEASE OF THIS MECHANISM WILL PRODUCE A
DISCHARGE OF THE FIRE EXTINGUISHING SYSTEM. ENSURE
HAZARD AREA IS EVACUATED BEFORE RELEASING
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6. System Operation
6.1.
General Comments
Personnel required to work in the protected area should be conversant with the detection and
extinguishing equipment installed and trained in fire procedures. All life-saving equipment must be
properly maintained. The method of system operation is chosen at the design stage to suit the
protection required for the hazard area and the environmental factors appropriate to that area. This
part of the document provides information relevant to all the standard operational systems to cover
the eventuality of changes to, or expansion of the original design.
6.2.
System Actuation
Each system is designed to suit the hazard area, whether the area is normally manned or
unmanned, and whether the detection / actuation devices are to be manual or automatic. The
permutation of systems is large but from an operational point of view, the systems are best grouped
as:
• Manual
• Fully Automatic
• Automatic with Manual Intervention
6.2.1. Manual system
Manual systems depend on human detection of a fire in the hazard area and prompt action to
actuate the local or remote strike knob for the IG-541 system to discharge and flood the protected
area and extinguish the fire. Where there fire alarm system is provided for the hazard. In case of
fire, detection system will generate audio-video alarm and it will indicate person present in the
hazard to evacuate from the hazard area.
On the total evacuation, the system can be triggered with the help of manual actuator, mounted on
the master cylinder of clean agent system unit. Since system is design for manual actuation. A
nominated people has to be there, who should be fully aware of how to trigger of system manually.
On periodic time fire drill to be perform with the staff, who are working in this hazard area or and
around.
All other instructions associated with manual operation form part of the user’s procedures on safety
precautions and fire drill.
6.2.2. Fully automatic system
Where a sensitive fire detection system is included for the automatic release of extinguishing agent,
the system shall only be capable of automatic release when two or more sensors detect the fire.
The number of detectors and their spacing is designed to ensure a satisfactory response time. To
ensure personnel may safely evacuate the risk area an adjustable time delay should be fitted such
that sufficient time may elapse prior to system discharge. Electrical automatic control and delay
devices shall be approved in accordance with EN 12094-1. Prior to system discharge (and at the
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commencement of any time delay period) a clearly audible alarm different from any other used shall
sound and continue until the complete system is reset. In areas of high ambient noise level, a visual
indication may also be required, in addition to the audible warning.
6.2.3. Fully automatic system with manual intervention
Manual intervention of an automatic system may be included for the following condition;
Where personnel are required to work within the protected area.
In protected areas where personnel are present and the concentration is greater than NOAEL, it is
recommended that the automatic feature of the system is isolated during occupation. This may be
achieved either by an electrically contacted lock assembly or by a clearly marked key switch at a
suitable location outside the risk area.
6.3.
Actions Following a Fire
These notes are only applicable to the hazard area(s) protected by a IG-541 inert gas fire
extinguishing system. Where such a system may form part of or combine with other forms of fire
protection systems then composite instructions for all systems are necessary to ensure the safety
of personnel and property following a fire.
6.3.1. Actions immediately following a fire
These actions should, at a minimum, include the following:
1. Advise the emergency services, Fire or Police if appropriate.
2. Organize a ‘roll-call’ of employees and any visitors.
3. Prevent unauthorized personnel from entering the hazard area.
4. In the case of deep-seated fires, the hazard space should be kept tightly closed for at least 60
minutes after discharge of the IG-541 inert gas extinguishing agent. It is essential that the fire be
completely extinguished before ventilating the space. Before permitting anyone to enter the space,
ventilate thoroughly or ensure self-contained breathing equipment is used.
5. Do not enter the hazard area in which fire has been extinguished with an open flame or lighted
cigarettes the possible presence of flammable vapors may cause re-ignition or explosion. Should it
be necessary to enter a space containing IG-541 inert gas or decomposition products the following
precautions should be taken;
1. Use a fresh air mask or self-contained breathing equipment.
2. Do not use a filter mask or canister type mask.
3. Do not enter space unless you are under observation from outside the space or tethered by a
lifeline.
4. Ensure that all pressurized equipment is isolated or safe from release.
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6.4.
Solenoid Functional Test
When a functional test is carried out by a system inspector typically disconnects the electrical
actuator from master cylinder valve or pilot cylinder valve to do a functional test. After that the
actuator is reset and reconnected the same onto the valve. The solenoid reset tool is used for the
resetting process. Please follow the steps in the following Figure 6.1.
The reset tool, which is the lever-operated type, is one of them. Remove / unscrew the solenoid
actuator. A special resetting tool must be used to re-insert the plunger. Screw the resetting tool
to the plunger solenoid valve port whit a wrench of 41 mm. Operate the lever
by pulling.
Released electrical release device HSN-ACT-S01,
see red marking at the push rod.
Position A: Reset tool assembly.
Position B: The reset tool HSN-RST-01 is mounted
hand-tight to the electrical release device HSN-ACT-S01.
Then pull the lever by 90° to tense the release device.
Figure 6.1.: Reset tool for electric actuator.
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7. Maintenance
7.1.
Introduction
This chapter contains maintenance instructions for IG-541 inert gas fire suppression system.
7.2.
Maintenance Procedure
IMPORTANT NOTICE:
IG-541 inert gas agent fire suppression system cylinder must be handled, installed and inspected by qualified
personnel in accordance with the manual.
7.2.1. General
1. A well planned and approved schedule is essential for the inspection and testing of the system,
keeping in view the following.
2. At least once a year, all systems shall be thoroughly inspected and tested for proper operation
by competent personnel. Discharge tests are not necessary.
3. The inspection report along with recommendations shall be filed and always available with the
owner and the same shall be produced to the authorities concerned when demanded.
4. At least once in six months, the agent quantity and pressure of the containers shall be checked
and details logged in a register.
5. For IG-541 inert gas agent container shows a loss in agent quantity of more than 5 percent or a
loss in pressure (adjusted for room temperature) of more than 10 percent, it shall be refilled or
replaced.
6. Date of inspection, gross weight of cylinder plus agent or net weight of agent, type of agent,
person performing the inspection, and, where applicable, the pressure at a recorded temperature
shall be recorded on a tag attached to the container.
7.3.
Agent Storage Cylinders
Agent storage cylinders, approved by Transportable Pressurized Equipment Directive (TPED), are
pressurized cylinders containing IG-541 inert gas agent with nitrogen and argon at 200 Bar gauge
at 15°C (2900 psi at 60°F) or 300 Bar gauge at 15°C (4350 psi at 60°F). This pressure causes
considerable thrust if the discharge valve is actuated, thus, the safety cap supplied with the cylinder
must be installed when handling or storing the cylinder, or whenever it is not securely fastened
down. The safety cap prevents objects from striking the burst disc valve and reduces and redirects
the thrust if the cylinder is accidentally discharged.
Handle the cylinder carefully to prevent damaging the gauge and other attached fixtures. The
cylinder must not be subjected to temperatures above 55 °C (130 °F), or the pressure relief device
may operate, releasing the agent.
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7.3.1. Container test
1. Clean agent containers shall not be recharged without retesting if more than 5 years have
elapsed since the date of the last test and inspection.
2. Transporting charged containers that have not been tested within 5 years shall not be allowed
3. Cylinders continuously in service without discharging shall be given a complete external visual
inspection every 5 years or more frequently if required. The visual inspection shall be in accordance
with the guidelines of TPED, that the cylinders need not be emptied or stamped while under
pressure. Inspections shall be made only by competent personnel and the results recorded on both
of the following:
a) A record tag permanently attached to each cylinder,
b) A suitable inspection report.
4. A completed copy of the inspection report shall be furnished to the owner of the system or an
authorized representative. These records shall be retained by the owner for the life of the system.
7.4.
Hose Test
7.4.1. General
All system hose shall be examined annually for damage. If visual examination shows any deficiency,
hose shall be immediately replaced or tested as specified below.
7.4.2. Testing
a) All hoses shall be tested every 5 years.
b) All hoses shall be tested at 1½ times the maximum container pressure at 50 ⁰C. The testing
procedure shall be as follows:
1. The hose is removed from any attachment.
2. The hose assembly is then placed in a protective enclosure designed to permit visual observation
of the test.
3. The hose must be completely filled with water before testing.
4. Pressure then is applied at a rate-of-pressure rise to reach the test pressure within a minimum
of 1 min. The test pressure is maintained for 1 full min. Observations are then made to note any
distortion or leakage.
5. If the test pressure has not dropped or if the couplings have not moved, the pressure is released.
The hose assembly is then considered to have passed the hydrostatic test if no permanent
distortion has taken place.
6. Hose assembly passing the test must be completely dried internally. If heat is used for drying,
the temperature must not exceed the manufacturer’s specifications.
7. Hose assemblies failing a hydrostatic test must be marked and destroyed and be replaced with
new assemblies.
8. Each hose assembly passing the hydrostatic test is marked to show the date of test.
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7.5.
Enclosure Inspection
At least every 12 months, the enclosure protected by these agents shall be thoroughly inspected to
determine if penetrations or other changes have occurred that could adversely affect agent leakage
or change volume of hazard or both. Where the inspection indicates conditions that could result in
inability to maintain the clean agent concentration, they shall be corrected. If uncertainty still exists,
the enclosures shall be retested for integrity.
7.6.
Training
All persons who could be expected to inspect, test, maintain, or operate fire extinguishing systems
shall be thoroughly trained and kept thoroughly trained in the functions they are expected to
perform. Personnel working in an enclosure protected by these agents shall receive training
regarding agent safety issues.
7.7.
Maintenance Procedures
Table 7.1. Maintenance Procedures by Time Schedule
Schedule
Requirement
Section
Daily
Check cylinder pressure
Paragraph 6.7.1
Monthly
Inspect hazard area system components
Paragraph 6.7.2
Check cylinder pressure
200 Bar gauge at 15°C (2900 psi at 60°F) or
300 Bar gauge at 15°C (4350 psi at 60°F)
Semi-Annually
Test pressure switches
Paragraph 6.3
Paragraph 6.7.3
Check Agent qty. and cylinder pressure
Actuation functional test
Every 2 Years
Blow out distribution piping with nitrogen
Paragraph 6.7.4
Every 5 Years
Agent cylinder pressure test or inspection
Paragraph 6.3
Flexible hose pressure test
Paragraph 6.4
7.7.1. Daily
7.7.1.1.
Check agent cylinder pressure
Check the cylinder pressure gauges for proper operating pressure (refer to Table 2.2.). If the
pressure gauge indicates a pressure loss (adjusted for temperature) of more than 10 %, it shall be
refilled. Remove and recharge the cylinder. For other requirement related to periodic maintenance
of IG-541 inert gas unit please refer manual clause 6.2.1.
7.7.2. Monthly
7.7.2.1.
General inspection
Make a general inspection survey of all cylinders and equipment for damaged or missing parts. If
the equipment requires replacement.
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7.7.2.2.
Hazard access
Ensure access to hazard areas, manual pull stations, discharge nozzles, and cylinders are
unobstructed and that nothing obstructs the operation of the equipment or distribution of IG-541
inert gas.
7.7.2.3.
Inspect hoses
Inspect flexible actuation hoses for loose fittings, damaged threads, cracks, distortion, cuts and
dirt. Tighten loose fittings and replace hoses with stripped threads or other damage. If necessary,
clean parts. Inspect the adapters, couplings and tees at the cylinder pilot outlets and tighten
couplings if necessary. Replace any damaged parts.
7.7.2.4.
Inspect pneumatic actuators
Inspect the pressure actuators for physical damage, deterioration, corrosion, distortion, cracks, dirt
and loose couplings. Tighten loose couplings. Replace damaged caps. Replace the control head if
damaged. If necessary.
7.7.2.5.
Inspect solenoid actuators
Inspect the solenoid actuators for damage, corrosion, and dirt. Check the solenoid actuators flexible
electrical line for wear and damage. Check the solenoid actuator for loose coupling and tighten if
necessary. Check that the indicator is in the SET position, the pull pin is installed in the manual
lever, and the seal wire is intact. Replace the solenoid actuator if damaged.
7.7.2.6.
Inspect cylinder and valve assembly
Inspect the Cylinder and Valve assembly for leakage and physical damage such as cracks, dents,
distortion and worn parts. Check the burst disc and pressure gauges for damage. Replace damaged
gauges or burst disc.
7.7.2.7.
Inspect straps and mounting hardware
Inspect the cylinder brackets, straps, cradles and mounting hardware for loose, damaged or broken
parts. Check the cylinder brackets, straps and associated parts for corrosion, oil, grease and grime.
Tighten any loose hardware. Replace damaged parts. If necessary.
7.7.2.8.
Inspect discharge hoses
Inspect the flexible discharge hoses for loose fittings, damaged threads, cracks, rust, kinks,
distortion, dirt and frayed wire braid. Tighten loose fittings and replace hoses with stripped threads.
If necessary.
7.7.2.9.
Inspect discharge nozzles
Inspect discharge nozzles for dirt and physical damage. Replace damaged nozzles. If nozzles are
dirty or clogged.
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7.7.3. Inspection procedures, semi-annual
7.7.3.1.
Discharge pressure switch test
1. Contact the appropriate personnel and obtain authorization for a shutdown.
2. Ensure that the hazard area operations controlled by the pressure switch are operative.
3. Manually operate the manifold switch by pulling up on the plunger and verify that the hazard
area operations controlled by the pressure switch shut down.
4. Return the manifold pressure switch to the SET position.
5. Reactivate all systems that were shut down by the pressure switch (such as power, ventilation
systems and compressors)
7.7.3.2.
Solenoid actuator test
Solenoid actuator must be tested semiannually for proper operation. This test can be performed
without discharging the cylinders. Test one hazard area at a time before proceeding to the next, as
follows:
1. Remove all solenoid actuators from all cylinders serving the hazard area being tested. Let the
solenoid actuators hang freely from the flexible electric conduit connections. Leave all pneumatic
actuators and pilot actuation hoses attached to the cylinders.
2. Operate the System electrically. This can be accomplished by actuation of the control panel or
by manual operation of an electric pull station.
3. If manual actuator have not operated. Replace all damaged actuator.
4. Observe the instructions on the caution label attached to manual actuator. Replace any damaged
heads which fail to reset properly before reconnecting to cylinders. Reattach all actuator to the
threaded port on the cylinder valve or pressure operated control head. Tighten the swivel nut
securely. Make certain each actuator is in SET position before reconnecting to cylinders. Failure to
follow this procedure will result in accidental system discharge.
7.7.3.3.
Check cylinder weight
Cylinder weight shall be checked and compared to the gross weight marked on the cylinder. If the
scale indicates a loss in agent quantity of more than 5 %, it shall be refilled. Remove and recharge
the cylinder. For other requirement related to periodic maintenance of Clean Agent Unit please
refer manual clause 6.2.1.
7.7.4. Inspection procedures - 2 year
1. Remove any nozzles from the piping to allow foreign matter to blow clear.
2. Remove all pneumatic actuators from the cylinders.
3. Blow out all distribution piping with air or nitrogen to ensure it is not obstructed.
4. Reconnect all control heads.
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7.7.5. Inspection procedures - 5 year
7.7.5.1.
Clean Agent Cylinders
IG-541 inert gas agent system is using TPED specification for their cylinders. Clean agent cylinders
continuously in service for more than five years without discharge shall be removed from rack and
given a complete external inspection incompliance with Authority Having Jurisdiction. Where
external inspection indicates that the container has been damaged, the same shall be sent for
hydraulic testing. However, hydraulic test shall be carried after discharge of cylinder.
7.7.5.2.
Flexible hose
All system hoses shall be visually inspected annually for damage. If visual examination shows any
deficiency, hose shall be replaced or tested. As per the EN15004-1 hydrostatic test to be conducted
at interval of every 5 years.
7.7.5.3.
Record
All inspection and test record to be maintain by end user. This record should be made available to
Auditor during safety audit.
7.8.
Check List
Table 7.2. Check List for Maintenance
Features of the installation
Installation Date
Type of the system
Authorized Installer
Country of Installation
Maintenance
Maintenance date
Last maintenance date
Authorized company
Authorized person
Maintenance type
System working pressure
Semi-annual
Annual
Every 2 years
Every 5 years
Visual inspection
Functionality
Revision of wear
Cylinder and valve
and tear parts
testing or/and
Control pressure
refilling
of the cylinders
….. bar
Cylinders storage
pressures verified
Cylinder capacity
Cylinders and labels are fine
Safety valve in good state
Electrical connections checked
Revision of nozzles and
Operation test of the solenoid
internal discs satisfactory
actuator satisfactory
Extinguishing panel
functional test is ok
….. L
General visual inspection OK
Blow out test with nitrogen to cleaning of the dirty and dusty ambient (each 2 years)
General maintenance (each 5 years)
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8. Typical System Layout
8.1.
General
The section is intended to illustrate typical system drawings.
Single Cylinder Arrangement:
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Multiple Cylinders Arrangement Without Pilot Cylinder:
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Multiple Cylinders Arrangement with Pilot Cylinder:
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Multiple Cylinders Arrangement with Pilot Cylinder & Selector Valves:
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Appendix A / Material Safety Data sheet for IG-541
SAFETY DATA SHEET
According to 91/155/EEC
SECTION 1: Identification of the substance/mixture and of the company/undertaking
1.1 Product identifier
Trade name:
IG-541
1.2 Details of the supplier of the safety data sheet
Supplier
Honeywell Middle East FZE
Telephone: +971 4 450 5800
Jebel Ali Free Zone, Office No. LB15413
Fax: +971 4 450 5900
18530, Jebel Ali, Dubai, UAE
SECTION 2: Composition/information on ingredients
2.1 Substances
Chemical formula:
52 Vol. % Nitrogen (N2)
40 Vol. % Argon (Ar)
8 Vol. % Carbon dioxide (CO2)
Substances with exposure limits:
Description
Carbon dioxide
%
MAK-Value
TRK-Value
BAT-Value
> 5 Vol. %
5000 ppm
--
--
SECTION 3: Hazard identification
For Human:
See section 11 and 15.
For Environment:
None
SECTION 4: First aid measures
Inhalation:
In high concentrations may cause asphyxiation. Symptoms may include
loss of mobility/consciousness. Victim may not be aware of asphyxiation.
Remove victim to uncontaminated area wearing self contained breathing
apparatus. Keep victim warm and rested. Call a doctor. Apply artificial
respiration if breathing stopped.
Eye contact:
Adverse effects not expected from this product.
Skin contact:
Adverse effects not expected from this product.
Ingestion:
N/A
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SECTION 5: Firefighting measures
N/A
SECTION 6: Accidental release measures
6.1 Personal precautions,
protective equipment and
emergency procedures: Provide sufficient ventilation. Do not inhale gases/vapours/mist.
If necessary, leave the room.
6.2 Environmental
Precautions:
N/A
6.3 Methods and material
for containment and
cleaning up:
Provide adequate ventilation.
SECTION 7: Handling and storage
7.1 Precautions for safe handling:
Make sure container valve and connections are tight; Use in well
ventilated areas. Only trained persons may handle compressed gas
containers.
7.2 Conditions for safe storage:
To be stored only in original containers.
Protect containers from heating over 50°C.
SECTION 8: Exposure controls/personal protection
Inhalation:
If oxygen level is below 10 Vol. %, or in case of long exposure, breathing
apparatus (independent of circulating air) is necessary.
Eye/face protection:
N/A
Skin protection
Hand Protection:
Guideline: EN 388 Protective gloves against mechanical risks.
Additional Information: Wear working gloves while handling containers
Body protection:
Protective shoes.
Other:
Wear safety shoes while handling containers
Guideline: ISO 20345 Personal protective equipment - Safety footwear.
when using the product.
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SECTION 9: Physical and chemical properties
9.1 Information on basic physical and chemical properties Appearance
Physical state:
Gas
Form:
Compressed gas
Color:
Colorless
Odor:
Odorless
pH:
Not applicable.
Flash Point:
Not applicable to gases and gas mixtures.
Evaporation Rate:
Not applicable to gases and gas mixtures.
Flammability Limit
- Upper (%):
Not applicable.
Flammability Limit
- Lower (%):
Not applicable.
Vapor pressure:
No reliable data available.
Relative density:
1,4236 kg/m3 at 15°C
Solubility(ies)
Solubility in Water:
17,1 ml/l at 0°C
Explosive properties:
Not applicable.
Oxidizing properties:
Not applicable.
9.2 Other information:
Not flammable.
SECTION 10: Stability and reactivity
10.1 Conditions to avoid: Exposure of compressed gas containers to increased heat.
Increased temperature will result in an increase in pressure which may
cause the container burst.
10.2 Materials to avoid:
No reaction with any common materials in dry or wet conditions.
10.3 Hazardous
Decomposition Products: N/A
SECTION 11: Toxicological information
Toxicological Information: Asphyxiant in high concentrations. In pure IG-541 atmosphere there
exists the danger of suffocation (through oxygen displacement).
SECTION 12: Ecological information
12.1 Degradability:
N/A
Environmental impact rating: N/A
Acute aquatic toxicity:
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SECTION 13: Disposal considerations
13.1 Product:
N/A
SECTION 14: Transport information
14.1 Country transport: ADR/RID/GGVS/GGVE-Class 3, Number 2a, gas mixture.
14.2 Inland navigation:
ADNR-Class 2, Number 12.
14.3 Maritime shipping: IMDG/GGVSea-Class 2, UN-No.: 1956, Page 2124.
14.4 Aviation:
ICAO/IATA-Class 2.2.
UN-No.: 1956, Page 220; compressed gases.
14.5 Transport in bulk according to Annex II of MARPOL and the IBC Code: Not applicable
SECTION 15: Regulatory information
15.1 EEC- Labelling
Symbols:
N/A
R-phrases:
N/A
S-phrases:
N/A
Other information:
Identification of the compressed gas containers in conformity with the
shipping instructions and ISO 7225. UUV-Gase (VBG 61)
SECTION 16: Other information
Other information:
For application in fire extinguishing systems, the IG-541 quantity is mainly
designed to create oxygen concentrations between 10% and 15% and CO2
concentrations between 2% and 5% and no hazards are known for the
healthy human during short exposure in this atmosphere. However the
combustion products from the fire itself could be highly toxic, therefore
people shall always leave the room when it is flooded with IG-541.
Note: The SDS document in this section is a sample reference only. Technically, SDS information
is country and language specific. To find the SDS, enter the part number of a product containing
agent.
------ End of Safety Data Sheet --------
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