UAE  .S  xxxx  
20 November, 2019  
 هيئة المارات للمواصفات و المقاييس  
Emirates Authority for Standards & Metrology  
(ESMA ( 
 
 
 
 
 
 
 
المواصفات القياسية الماراتية  
 
UAE.S  XXXX : 2020  
 
أنظمةالطفاء الذات ي  لحرائق غرف محركات الحافلات  
Fire suppression systems intended for engine compartments  
of buses and coaches  
 
  
UAE  .S  xxxx  
20 November, 2019  
 Table of contents  
1. Scope  ................................ ................................ ................................ ................................ ...............  3 
2. Fire testing  ................................ ................................ ................................ ................................ .......  3 
3. Compo nent testing  ................................ ................................ ................................ ..........................  3 
4. Test reports  ................................ ................................ ................................ ................................ ..... 3 
5. Risk assessment  ................................ ................................ ................................ ...............................  4 
6. Scaling of sys tem ................................ ................................ ................................ .............................  5 
7. Fire detection  ................................ ................................ ................................ ................................ .. 6 
8. Installation  ................................ ................................ ................................ ................................ .......  6 
9. Marking ................................ ................................ ................................ ................................ ........  6 
10. Factory production control ................................ ................................ ................................ ........  21 
11.  Follow -up inspection/audit  ................................ ................................ ................................ .........  7 
12.  Changes to tested and approved products  ................................ ................................ .................  7 
Annex 1 – Fire testing procedure ................................ ................................ ................................ . 20 
Annex 2 –Component testing  
Annex 3 -Design manual  
Annex 4 Document control  
  UAE  .S  xxxx  
20 November, 2019  
 Fire suppression systems intended for engine compartments  
of buses and coaches  
 
1. Scope  
 
This standard covers automatic fire suppression systems intended for ins tallation in engine 
compartments of buses and coaches.  
The standard applies to new and existing buses of single -deck, double -deck, rigid or 
articulated  specifically buses having a capacity exceeding 8 passengers in addition to the 
driver ( Class I, Class  II and Class III).  
2. Fire test ing 
 
A complete fire suppression system, representative to what is used in practice, must be tested in 
accordance with the fire testing procedure described in Annex 1.   
The test method is applicable to fire suppression systems intended for diesel -fueled buses and 
coaches with engine compartments having a gross volume between 2 m³ – 6 m³. Within this 
range of engine compartment size, the suppression systems can be scaled based on the test 
result.  
Outside of this gross volume ran ge, scaling should be adapted to the design of the engine 
compartment and a special approval from the accredited third -party testing laboratory   for the 
installation design is needed.  
3. Component testing  
The robustness of the included components in the fire  suppression system must be verified 
and tested through international standards, as specified IN Annex 2 , by independent 
accredited testing laboratories  according ISO 17025 . The c omponent testing will: 
 secure survivability of the system and its components ;  
 secure that the system with included components will not fail before it is activated 
and discharged ;  
 secure that the system remains operational after being exposed to  vibration, 
temperature changes and corrosion etc.  
The requirements can be found in Annex 2. If not stated otherwise, it is acceptable for 
new components to be used for every component test .  
 
4. Test report s 
   The test reports shall as a minimum include the following information:  
 Name and address of the testing laboratory  
 Date and identificati on number of the test report  UAE  .S  xxxx  
20 November, 2019  
  Name and address of the client  
 Date of test  
 Name or other identification marks of the tested product  
 Detailed drawing of the test set -up 
 Description of the tested product:  
o Drawing(s) or pictures of the tested product  
o Descriptio n 
o Specification of included material  
 Total amount of suppression agent and propellant gas  
 Number and types of used nozzles  
 Identification of the test equipment and used instruments  
 Deviations from the test method, if any  
 Photos from the tests  
 Test results  
 Date and signature  
 
5. Risk assessment  
The fire suppression system shall be installed according to the system manufacturer's installation 
manual.  
A risk assessment shall be made prior to equipment being placed into service. Its main purpose is 
to demonstrate  that the system design corresponds to the test reports.  
A risk assessment shall further be made when variations in design, use condition and 
environment, could change the fire risk potential or system performance. In practice this means 
that a risk asses sment would have to be carried out for each new engine compartment 
configuration.  
The system shall be ensured to work properly regardless of the vehicle's attitude.  
In the risk assessment, fire hazards and dangers related to efficient use of the extinguis hment 
system shall be identified and documented together with a description on how each hazard is 
handled.  
 
The fire hazard analysis shall, as a minimum, consider  the following:  
(a) determination of  the location and direction of the suppression agent dischar ge point(s) (e.g. 
nozzles, extinguishing agent generators or extinguishing agent discharge tube or other 
distribution points) ;  
(b) identification of potential fire hazards within the engine compartment and each 
compartment where a combustion heater is located , must be conducted  and the discharge 
point(s) located such that the suppression agent will be distributed to cover the fire hazard 
when the system activates ; 
(c) the spray pattern and direction of discharge points, as well as the discharge distance  - shall 
be ensured to cover identified fire hazards ;  
(d) those components whose surface may reach temperatures above the auto -ignition 
temperature for fluids, gases or substances that are present within the compartment;  
(e) electrical components and cables with a current or voltage high enough for an ignition to 
occur;  UAE  .S  xxxx  
20 November, 2019  
 (f) hoses and containers with flammable liquid or gas ( if those are pressurized );  
(g) the gross volume of the engine compartment ; 
(h) the protected fire risks in the engine compartment ; 
(i) installation drawings including  placement of extinguisher agent container, pressure vessel, 
controller, piping systems, detection system, hoses, etc. ; 
(j) mass of suppression agent ; 
(k) the type of nozzle (article number) and mass of nozzles ; 
(l) nozzle location and direction ; 
(m) the lowest and highes t approved system pressure ; 
(n) system operating temperature range ; 
(o) estimation of the minimum temperature the suppression system may be activated at and 
calculated system pressure at this temperature ; 
(p) estimation of maximum temperature the suppression system ma y be activated at and 
calculated system pressure at this temperature ; 
(q) estimation of maximum air flow rate through the engine compartment  
The risk assessment shall be made by personnel having documented experience for the task. The 
suppression system manufa cturer shall either be directly involved in the risk assessment or 
indirectly through an organization appointed to the task by the suppression system 
manufacturer.  
The fire risk management process shall be fully documented for the life of the equipment (e. g. 
maintenance requirements) and be available to the relevant parties as well as at the at follow -up 
inspections/audits.  
6. Scaling of system  
The suppression system shall be scaled from the tested system, based on the total gross volume 
of the engine and co mbustion heater compartments where the system is to be installed. When 
measuring the engine compartment and the combustion heater compartments, the gross volume 
of these compartments shall be measured, i.e. the volume of the engine and its components 
shall  not be subtracted.  
 
The scaling of the system includes the mass of the suppression agent, all discharge points and the 
mass of the propellant gas container, if applicable. The system pressure shall remain the same as 
in the tested system. If the system i ncludes a discharge tube for the extinguishing agent, the 
length of the tube shall be scaled without nozzles. It is acceptable if the suppression system has 
more extinguishing agent and/or more discharge points and/or a longer discharge tube for the 
exting uishing agent and/or more propellant gas than required according to the scaling models 
found below.  
 
If the gross volume of the engine and combustion heater compartments exceed 4 m ³, the 
suppression system shall be scaled up using the following scaling fa ctor calculated in (1) below. If 
the gross volume is less than 4 m ³, it is allowed to scale down the suppression system using the 
scaling factor (2) below. S x denotes the scaling factor and x denotes the total gross volume 
including the engine and combusti on heater compartments [m ³].  
 
Sx = 0,1 · x + 0,6  (1)  
Sx = 0,15 · x + 0,4  (2)  
 UAE  .S  xxxx  
20 November, 2019  
 The scaled number of nozzles or other discharge points, if the suppression system has more than 
one discharge point may be rounded to the closest whole number . 
 
7. Fire detecti on 
Buses and coaches shall be equipped with an automatic fire detection system alarm system in 
toilet compartments, driver's sleeping compartments and other separate compartments. Upon 
detection, the system given shall provide the driver with both an acous tic and a visual signal in 
the driver's compartment and shall activate the hazard warning signal as well as activating the 
fire suppression system. The alarm system shall be at least operational whenever the engine 
start device is operated, until such time  as the engine stop device is operated, regardless of the 
vehicle's attitude.  
 
8. Installation  
The manufacturer shall provide the installer a design manual in compliance with Annex 3. The 
installer shall be approved/licensed by the manufacturer. After each in stallation the installer 
shall sign a declaration where he declares that the system is installed and checked according to 
the risk assessment and the manufacturer’s design manual. The declaration shall be available at 
follow -up inspections /audits .  
 
9. Markin g 
Products entitled to display ESMA  symbol shall have a marking designed as the figure below. 
The marking shall be legible and durable and shall be applied in conjunction to the engine 
compartment .  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 نظام إطفاء الحرائق معتمد  
وفق المواصفة الماراتية رقم   
UAE .S  xxxx  
 
اسم المنتج  
الرقم التسلسلي  
اسم الشركة المصنعة Fire suppression system 
approved as a component  
with regard to UAE .S  xxxx  
 
Product name  
Serial number  
Name of manufacturer  
 UAE  .S  xxxx  
20 November, 2019  
 10.  Compliance  Follow -up  
 
The product installation documentation and components will be reviewed when the 
certificate is renewed. Installation guides according to the requirements of this standard 
shall be documented and available for audit  
 
11.  Changes to tested and approved  products   
 
No changes may be made to the product that has been tested and approved, without being 
evaluated and approved by ESMA.  
Therefore, the manufacturer shall notify the Emirates Authority for Standardization and 
Metrology (ESMA) of any planned change to the tes ted and approved product. With this 
notice, a description of the changes should be attached along with the technical data.  
   The Emirates Authority for Standardization and Metrology will then evaluate the 
measures to be taken in order for approval to rema in in force after such changes are made. 
Assessment may result in additional tests  
12.      Factory Production Control  
The manufacturer shall operate Factory Production Control procedures to ensure that 
products displaying the ESMA -symbol fulfil the requirements in this standard. These 
inspection procedures shall be described in a quality manual or corresponding document 
and s hall fulfil the requirements set out in this section. If the manufacturer has an UAE.S 
ISO 9001 quality system that has been certified this can be regarded as fulfilling the 
requirements.  
 If the manufacturer hasn’t an UAE.S ISO 9001 quality system certifi ed, it should be fulfilling 
the requirements in the annex 4. 
  UAE  .S  xxxx  
20 November, 2019  
 Annex 1  – Fire testing procedure  
 
Fire suppression system approved as a component  
1. Specifications  
1.1. Fire suppression systems shall be tested for high fire load, low fire load, 
high fire lo ad with fan and re -ignition.  
1.2. The test apparatus, test fires and general test conditions are described in 
Appendix 1 to this annex.  
1.3. High fire load  
1.3.1.  The high fire load test shall be conducted in accordance with Appendix 
2 to this annex.  
1.3.2 . The test shall be conducted with the extinguishing agent and the 
propellant gas vessel or the suppression agent generator cooled to the 
minimum operating temperature for the fire suppression system, as 
declared by the manufacturer.  
1.3.3.  The fires shall  be fully extinguished, either, in the minute after 
activation or upon end of the discharge of the suppression system.  
1.3.4.  The test is considered passed either after success at first attempt or at 
two of three attempts in a case when first of these atte mpts fails.  
1.4. Low fire load  
1.4.1.  The low fire load test shall be conducted in accordance with Appendix 
3 to this annex.  
1.4.2.  The fires shall be fully extinguished either in the minute after activation 
or upon end of the discharge of the suppression system.  
1.4.3.  The test is considered passed if success was achieved at the first attempt 
or at two of three attempts in a case when first of these attempts fails.  
1.5. High fire load with fan  
1.5.1.  The high fire load test with fan shall be conducted in a ccordance with 
Appendix 4 to this annex.  
1.5.2.  The fires shall be fully extinguished either in the minute after activation 
or upon end of the discharge of the suppression system.  
1.5.3.  The test is considered passed if success was achieved at the first at tempt 
or at two of three attempts in a case when first of these attempts fails.  
1.6. Re-ignition test  
1.6.1.  The re -ignition test shall be conducted in accordance with Appendix 5 
to this annex.  
1.6.2.  The fire shall be fully extinguished and no re -ignition  shall occur 45 
seconds after the extinguishing of the fire.  
1.6.3.  The test is considered passed either if success was achieved at the first 
attempt or at two of three attempts in a case when first of these attempts 
fails.  
 
 UAE  .S  xxxx  
20 November, 2019  
 Annex 1  - Appendix 1  
 Test ap paratus, test fires and general test specifications  
1. Test apparatus  
1.1. The test apparatus is to be made of steel plate. The thickness of the steel plate shall be in accordance with 
Table 1. Figure 1 shows the test apparatus from the front side, Figure 2 from the rear side and Figure 3 from 
above. The front side of the test apparatus simulates the rear side of a real engine compartment.  
Figure 1  
Coordinate system for the position of objects in test apparatus (view from front side)  
 
Figure 2  
Test apparat us seen from the rear  
 
 
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 Figure 3  
Test apparatus seen from above  
 
 
Table 1  
Test apparatus objects  
Objects  Plate thickness  
Fan cylinder  1.5 – 2 mm  
Obstructions  1.5 – 2 mm  
Exhaust manifold mock -up  8 mm  
Engine mock -up  2 – 3 mm  
Muffler mock -up  2 – 3 mm  
Exhaust pipe  2 – 3 mm  
Connection pipe  2 – 3 mm  
Walls, ceiling and floor   1.5 – 3 mm  
1.2. Object locations  
1.2.1.  All objects in the test apparatus are positioned according to coordinates (x, y, z) as shown in Table 2. 
Origin is the positi on marked (O) in Figure 1. The value of the coordinates is the distance in metres from 
the origin (see Figure  1), i.e. left -front -bottom corner.  
 
Table 2  
Coordinates of objects  
Objects  Coordinates [x; y; z]  
Fan cylinder  [-0.60; 0.40; 0.10]  
Obstruction 1   [0.0; 0.26; 0.0]  
Obstruction 2  [0.26; 0.05; 0.02]  
Exhaust manifold mock -up  [0.76; 0.05; 0.47]  
Engine mock -up  [0.87; 0.05; 0.04]  
Obstruction 3  [1.44; 0.05; 0.02]  
Obstruction 4  [0.82; 1.2; 0.0]  
Muffler mock -up  [2.0; 0.28; 0.23]  
1.3. Framewo rk 
1.3.1.  The framework of the test apparatus shall be constructed according to Figure  4. The sizes of the beams are 
50 mm × 50 mm and 100 mm × 50 mm respectively. The framework shall be 300 mm above the ground.  
UAE  .S  xxxx  
20 November, 2019  
 Figure 4  
Framework for the test apparatus  
 
 
1.4. Apertures  
1.4.1.  In addition to the opening for the fan, the test apparatus includes six apertures. The dimensions and 
positions of the apertures are given according to the coordinates in Table 3. The positions are given by 
referring to two diagonall y opposite corners (all apertures are rectangular in shape). The apertures are 
shown in Figure 4.  
Table 3  
Coordinates of apertures in the test apparatus  
Aperture  Coordinates [x; y; z] – [x; y; z]  Area of aperture  
A1 [0.03; 0.00; 1.08] – [1.18; 0.00; 1.13]  0.06 m2 
A2 [1.22; 0.00; 1.08] – [2.37; 0.00; 1.13]  0.06 m2 
B [2.40; 0.50; 0.70] – [2.40; 1.30; 0.90]  0.16 m2 
C [0.85; 1.50; 0.03] – [1.24; 1,50; 0.36]  0.13 m2 
D1 [2.00; 0.05; 0.00] – [2.35; 0.73; 0.00]  0.27 m2 
D2 [2.00; 0.78; 0.00] – [2.35; 1.20; 0.0 0] 0.26 m2 
 Total area of aperture:  0.94 m2 
1.5. Fan 
1.5.1.  An axial fan with a diameter of 710 mm shall be mounted on the left side of the fan cylinder. The diameter 
of the cylinder shall be equal to the diameter of the fan. The fan shall produce a cert ain rate of air flow 
through the cylinder according to the test scenarios in Appendices 2 to 5. A frequency converter may be 
used to adjust the fan speed.  
 
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20 November, 2019  
 1.6. Mock -up components  
1.6.1.  The dimensions of the engine mock -up are 1,000 mm × 650 mm × 500 mm. The dimensions of the muffler 
mock -up are diameter 400 mm × 800 mm. The exhaust manifold mock -up shall have the inner dimensions 
of diameter 80  mm × 900 mm. The mock -up components shall be hollowed. The exhaust manifold mock -
up shall be connected to the mu ffler mock -up through a pipe with a diameter of 76 mm. A pipe from the 
muffler mock -up shall also be used to carry the exhaust gases from the pre -warming system out from the 
test apparatus.  
1.7. Thermocouples  
1.7.1.  Seven thermocouples (Tc) shall be mounte d on the exhaust manifold mock -up, drilled 2 mm into the tube 
from the outside. Thermocouples Tc1 to Tc4 shall be located on top of the mock -up at the distances from 
the mock -up inlet according to Table 4. Thermocouples Tc5 to Tc7 shall be located around t he mock -up at 
the same distance from the inlet as Tc2. The location of the thermocouples is illustrated in Figures 5 and 6.  
Table 4  
Distance to thermocouple from inlet of exhaust manifold mock -up 
Thermocouple  Distance from inlet  
Tc1 250 mm  
Tc2 300 mm  
Tc3 350 mm  
Tc4 600 mm  
Tc5 300 mm  
Tc6 300 mm  
Tc7 300 mm  
Figure 5  
Thermocouples on the exhaust manifold mock -up 
 
 
Figure 6  
Thermocouples on the exhaust manifold mock -up (the inlet of the mock -up is on the left side)  
 
 
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 1.8. Propane burner  
1.8.1.  The prop ane burner used to pre -warm the exhaust system shall be chosen as to fulfil the requirements on 
achieved temperatures specified in paragraph  3.4.6.  
1.9. Obstructions  
1.9.1.  Obstruction 1 has the dimensions of 900 mm × 840 mm × 230 mm, as shown in Figure 7.  Obstructions 2 
and 3 consist of horizontal and vertical obstruction tubes as shown in Figure 8. The horizontal obstruction 
tubes are closed and hollow, with a diameter of 80 mm and a length of 480 mm. The vertical tubes are 
hollow and open in the bottom, with a diameter of 80 mm and a length of 230 mm. The open distance 
between every tube is 20 mm. Obstruction 4 is a box measuring 1,250 mm × 300 mm × 390 mm as shown 
in Figure 9.  
Figure 7  
Obstruction 1  
 
 
Figure 8  
Obstruction 2 and 3  
 
UAE  .S  xxxx  
20 November, 2019  
 Figure 9  
Obstruction 4 
 
 
1.10.  Pool fire trays  
1.10.1.  The square pool fire trays with fibreboards and the rectangular pool fire trays shall 
be positioned in its orientation according to the test scenarios in Appendices 2 to 4. Figure 10 shows the 
dimensions for test fire No.  2. The test fire shall be positioned perpendicular to the long edge of the test 
apparatus.  
Figure 10  
Distances for test fire No. 2  
 
2. Test fires  
2.1. The test fires in Table 5 are to be used in the different test scenarios described in Appendices 2 to 5 . Diesel 
oil (commercial fuel oil or light diesel oil), heptane (C7H16) and engine oil 15W -40 with a flash point COC 
of 230 °C and viscosity at 40 °C of 107 mm²/s shall be used as test fuels.  
UAE  .S  xxxx  
20 November, 2019  
 Table 5  
Test fires  
Test fire 
No. Description  Fuel Approximate pe ak heat 
release rate 60  sec 
after ignition  
1 Pool fire 300 mm × 300 mm  Diesel oil and heptane  60 kW  
2 Pool fire 300 mm × 300 mm and 2 
fibreboards  Diesel oil and heptane  110 kW  
3 Pool fire 200 mm × 300 mm  Diesel oil and heptane  40 kW  
4 Pool fire diamete r 150 mm  Diesel oil and heptane  7 kW  
5 Spray fire (450 kPa, 0.73 kg/min. 
±10 per cent)  Diesel oil  520 kW  
6 Spray fire (450 kPa, 0.19 kg/min 
±10 per cent)  Diesel oil  140 kW  
7 Dripping oil fire (40 droplets/min. 
±10)  Engine oil  5 kW  
2.2. Three different types of pool fire trays are applied in Table 5: square, rectangular and circular. Detailed 
descriptions of these trays are given in Table 6.  
Table 6  
Specification of pool fire trays  
Dimensions  Rim height  Nominal thickness  Used for test fire No.  
300 mm × 300 mm  70 mm  1.5 mm  1, 2 
200 mm × 300 mm  70 mm  2 mm  3 
Diameter 150 mm  100 mm  1.5 mm  4 
2.3. The amount of water, diesel and heptane used in the tests shall be in accordance with Table 7.  
Table 7  
Amount of fuel used in pool fire trays  
Dimensions  Water  Diesel Heptane  Used for test fire No.  
300 mm × 300 mm  1.0 l 0.5 l 0.2 l 1, 2, 
200 mm × 300 mm  0.5 l 0.5 l 0.2 l 3 
Diameter 150 mm  0.2 l  0.2 l  0.1 l  4  
2.4. Test fire No. 2 consists of a heptane pool and two diesel soaked fibreboards with a dry density  of 3.5 kg/m3. 
The dimensions of the fibreboards shall be 12 mm × 295 mm × 190 mm. The fibreboards shall consist of 
at least 90 per cent raw material from wood. The moisture content in the boards before they are soaked in 
diesel oil shall not exceed 7 per cent. The fibreboards shall be completely immersed in diesel oil for at least 
10 minutes prior to the test and mounted vertically in the pool fire tray not more than10 minutes before the 
start of the test.  
2.5. Test fire Nos. 5 and 6 consist of diesel oil spray fires while Test fire No. 7 consists of a dripping oil fire (by 
hot surface ignition).  
 The spray nozzle for test fire No. 5 shall be a Lechler 460.368.30 or an equivalent. The spray nozzle for 
test fire No. 6 shall be a Lechler 212.245.11 or an equi valent. The spray nozzle for test fire No. 7 shall be 
a Danfoss 0.60X80H or an equivalent.  
3. Installation of the fire suppression system  
3.1. To obtain the minimum discharge rate condition, an extinguishing system is to be assembled using its 
maximum pipi ng limitations with respect to the number of fittings and size and length of pipe, if relevant. 
The cylinder is to be used with its rated capacity and the cylinder or gas cartridge pressurized with 
propellant gas to the normal operating pressure, if releva nt. UAE  .S  xxxx  
20 November, 2019  
 3.2. The fire suppression system shall be installed by the system manufacturer or supplier. Figure 11 shows the 
area where extinguishing agent discharge points such as of nozzles, extinguishing agent generators or 
extinguishing agent discharge tubes ma y be located. The discharge points shall be positioned inside the test 
apparatus, at two different areas:  
 (a) In the ceiling and at the rear wall. Discharge points positioned in the ceiling shall be 
positioned at a minimum of 750 mm above the floor level (z ≥ 0.75) and outside of Obstruction 1. Nozzles 
positioned at the rear wall shall be positioned within 350 mm from the rear wall (y ≥ 1.15) and minimum 
450 mm from the floor level (z ≥ 0.45).  
Figures 17 and 18 show the area where the nozzles may be locat ed. 
 (b) Inside the small box (referred to as Obstruction 4) in the rear side of the test 
apparatus. Nozzles shall be located in the ceiling of the box with a minimum of 290 mm from the floor (z 
≥ 0.29).  
Figure 11  
Nozzle positioning seen from the rear side  of test apparatus  
 
3.3. The system set -up and configuration shall be observed and documented prior to the test (e.g. amount of 
suppression agent and propellant gas, system pressure, number, type and location of discharge points, length 
of pipes and numbe r of fittings).  
 Temperature shall be measured during the re -ignition tests at locations specified in Appendix 1.  
3.4. Practical conduct of a test  
3.4.1.  The pool fire trays are to be filled with diesel and heptane on a base of water 
according to Table 7. If fibreboards are to be used as the fire source, the fibreboards shall be soaked in 
diesel oil, prior to the test, according to instructions in paragraph 2.4. above.  
3.4.2.  A pre -burn time based on the information in Appendices 2 to 5 is required. The pre -
burn time is measured beginning from the time the first fire is ignited. All pool fires in the test scenarios 
shall be ignited within the allowed ignition -time, according to Appendices 2 to 5, using a suitable ignition 
source. The low fire load scenario i n Appendix 3 may be performed either with one test fire at a time or the 
test fires combined with the suppression system showing its ability to extinguish all test fires, separately or 
merged.  
UAE  .S  xxxx  
20 November, 2019  
 3.4.3.  A fan is used in some of the test scenarios to obtain a specific air flow rate into the 
test apparatus. The fan shall be engaged 30 seconds before the suppression system is activated. The fan 
shall remain active until the test is complete, i.e. until it is determined whether the test is passed or failed.  
3.4.4.  A diesel spray is used in some of the test scenarios. The diesel spray shall be 
activated 10 seconds prior to activation of the suppression system. The diesel spray shall remain active until 
the test is completed, i.e. until it is clarified if the test is  passed or failed.  
3.4.5.  After the stipulated pre -burn time, the suppression system shall be manually or 
automatically activated.  
3.4.6.  In the test for re -ignition, the exhaust manifold mock -up tube is pre -heated prior to 
the test with a burner. Pressuri zed air may be added to the flame for better combustion. The tube shall be 
heated from the inner side until the temperature of Tc2 is above 600 °C and Tc1 is above 570 °C and the 
temperatures of Tc5, Tc6 and Tc7 not are less than 520 °C. When the predefine d temperatures are reached 
the pre -heating procedure stops. After 30 seconds the engine oil shall start dripping and the suppression 
system activate 15 seconds later. The engine oil shall ignite before activation of the suppression system. 
The oil shall co ntinue to drip on to the tube until it is clarified if the test is passed or failed.  
4. Tolerances  
4.1. A tolerance of ±5 per cent of the stipulated values shall apply (for time values: ±5 seconds).  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 UAE  .S  xxxx  
20 November, 2019  
 Annex 2: Componen t testing  
 
 
Component testing 1  
 
Property  Thermal cycling resistance  
Component  Representative sample of a suppression system  
Applicable to type of system  All systems  
Standard  UAE.S UAE.S ISO  16750 -3:2007  
Temperature cycling as stated by Figure 1  in 
UAE.S UAE.S ISO  16750 -3:2007, 4.1.1 where Tmin 
and Tmax correspond to minimum and maximum 
operating temperatures 2 of the suppression 
system declared by the manufacturer.  
Performance requirements  Following these tests, the representative 
sample shall  be subjected to Component Test 2 .  
 
 
Component testing  2 
 
Property  Mechanical stress resistance  
Component  Representative sample of a suppression system  
Applicable to type of system  All systems  
Standard  UAE.S ISO  16750 -3:2007  
Vibration test wit h load and duration as 
specified in UAE.S ISO  16750 -3:2007 (no 
temperature cycling), Test VII ( Sprung masses , 
commercial vehicles ). The test profile shall be 
extended as to include additional profile in case 
of f n < 30 Hz which means that curve 2 shall be 
followed for X < 45 and curve 1 for X > 45 
(Figure 11 in UAE.S ISO  16750 -3:2007).  
Mechanical shock test in accordance with UAE.S 
ISO 16750 4.2.2.2, with 20 g as acceleration 
(Commercial vehicles , devices on rigid points of 
the body or frame ). This test is  to be performed 
on the same system as vibration test.  
Performance requirements  Following these tests, the representative 
sample shall be discharged, show no visible 
signs of leaks or loosened fittings, and the mass 
of the extinguishing agent discharged  shall not 
be less than 95 % of the highest mass 
discharged during the fire tests, based upon 
compar UAE.S ISO n of extinguishing agent vessel 
mass or sample mass before and after the test.  
  UAE  .S  xxxx  
20 November, 2019  
 Component testing  3 
 
 
Property  Combined mechanical and thermal stress 
resistance  
Component  Representative sample of a suppression system  
Applicable to type of system  Component Test 3 is optional . If performed, it 
replaces Component Test 1 and Component 
Test 2.  
Standard  UAE.S ISO  16750 -3:2007  
Mechanical test with vibration load and 
duration as well as mechanical shocks as 
specified in Component Test 2 , with 
simultaneous temperature cycling as stated in 
Component Test 1 .  
Performance requirements  Following these tests, the representative 
sample shall be disch arged, show no visible 
signs of leaks or loosened fittings, and the mass 
of the extinguishing agent discharged shall not 
be less than 95 % of the highest mass 
discharged during the fire tests, based upon 
compar UAE.S ISO n of extinguishing agent vessel 
mass or sample mass before and after the test.  
 
Component testing  4 
Property  Corrosion resistance  
Component  Representative sample of a suppression system  
Applicable to type of system  All systems  
Standard  Test method B in UAE.S ISO  21207, 3 weeks 
exposure  
Performance requirements  Following this test, the representative sample 
shall be discharged, and the mass of the 
extinguishing agent discharged shall not be less 
than 95 % of the highest mass discharged 
during the fire tests, based upon compar UAE. S 
ISOn of extinguishing agent vessel mass or 
sample mass prior to and after the test.  
 
Component testing  5 
Property  The extent of protection provided by an 
enclosure against ingress of solid foreign 
objects and water  
Component  Electrical and electron ic equipment  
Applicable to type of system  All systems  
Standard  UAE.S IEC 60529:1989/A1:2009/COR3:2009  
The equipment upon testing shall at least fulfill 
the degree of protection IP65.  
Performance requirements  In accordance with the standard.  
 UAE  .S  xxxx  
20 November, 2019  
 Annex 3 – Design manual  
 
Approval  impose that the manufacturer’s system design manual as a minimum fulfills design 
parameters of the tested system. For an engine compartment with the same gross volume as 
the test apparatus (4 m 3) this means that the at least following variables must exactly match 
the tested system:  
 
 Number of nozzles (or other discharge points used)  
 Nozzle type used (if the tested system utilized more than one nozzle type, it is 
allowable to use them in different proportions as long as the to tal flow rate is assured 
to be the same)  
 Mass of extinguishing  agent (including safety margin)  
 Extinguishing agent  
 Mass of propellant gas  
 Pressure of the propellant gas (at 20°C)  
 Type of propellant gas  
 Maximum pipe length from agent cylinder to the mos t remote nozzle.  
 Dimensions of pipes and fittings (exact match)  
 
The design manual should include a detailed description of the installation procedure and 
what engine parts are to be protected, for example: turbo charger, manifold, generator 
including el ectrical wiring, air conditioner, auxiliary heaters and pressurized oil and fuel lines 
and distribution piping.  
 
The design manual shall also include:  
 
 A technical description of the suppression system  
 Placement of extinguishing agent and propellant gas  containers  
 Article number of all the included components  
 The labeling and identification of high -pressure hoses, fitting and pressurized 
containers  
 The pressure in containers and in the constituent systems  
 Pressure test procedure for the piping upon c ompleted installation if the operating 
pressure exceeds 30 bar  
 The maximum and minimum storage and operating temperature  
 A technical description of the detection system  
 A schematic description showing the detection system, alarm and control unit and 
any shut-down devices (if applicable)  
 
 
 
 UAE  .S  xxxx  
20 November, 2019  
 ANNEX 4 - Factory production control  
 
The manufacturer shall operate FPC (Factory Production Control) procedures to ensure that 
products displaying the ESMA -symbol fulfil the requirements in this standard. These insp ection 
procedures shall be described in a quality manual or corresponding document and shall fulfil the 
requirements set out in this section. If the manufacturer has an UAE.S ISO 9001 quality system 
that has been certified by an accredited third -party test ing laboratory/certification body, as 
specified in Section 1, this can be regarded as fulfilling the following requirements in respect of 
organization, management review, document control, control of nonconforming products, 
corrective actions, handling of finished products and complaints.  
 
1 Management review and internal auditing  
The company management shall perform documented reviews of the company's inspection 
procedures at regular intervals in order to ensure the efficacy of the procedures.  
 
2 Document co ntrol  
        Only the current editions of documents concerning manufacturer's inspection shall be 
available to the persons concerned in the company. There shall be a list of the documents, 
and a distribution list for them, together with procedures to prod uce new documents, 
alteration of existing documents and collection of documents that are no longer valid.  
 
3 Design control  
Design management procedures shall include an instruction that any design changes shall 
be notified to, and approved by, the accredit ed third -party testing laboratory/certification 
body before they can be introduced.  
 
4 Testing and inspection  
4.1  Reception inspection  
Reception inspection (goods inward inspection) shall be performed to the extent regarded as 
necessary in order to verify  that incoming materials and products accord with specified 
requirements. If materials or goods are imported, the manufacturer's documents that certify 
that the materials or goods supplied fulfil the requirements set out in Section 11.5.3. shall be 
inspect ed. 
4.2  Manufacturing inspection  
Manufacturing inspection shall be performed to the extent regarded as necessary in order to 
ensure that products that are manufactured fulfil specified requirements.  
 
4.3  Inspection of finished products  
Finished produc ts shall be inspected to the extent regarded as necessary in order to ensure 
that they fulfil the specified requirements.  
 
4.4  Equipment  
Equipment shall be calibrated, inspected, adjusted and maintained as appropriate.  
 UAE  .S  xxxx  
20 November, 2019  
 4.5  Installation control  
If the manufacturer of the system is not the installer of the system, he shall at specified 
intervals perform spot checks on installed systems. Documents demonstrating the performed 
spot checks shall be available at follow -up inspections. See also section 11.3.  
  
5  Control of nonconforming products  
     Products that do not fulfil specified requirements shall be separated from those that do. Such 
products may not be sold under the same name or number etc. as certified products.  
 
6  Corrective actions  
     Any failures detected by manufacturer's FPC and/or by follow -up inspection/audit shall be 
investigated by the manufacturer, and appropriate steps shall be taken to correct the situation 
and prevent a repetition.  
 
8  Handling of finished products  
     Damag e and deterioration shall be prevented in connection with handling, storage, packing and 
delivery.  
 
9  Traceability  
     It shall be possible to trace products that have been supplied back to the relevant production and 
material batch. Which components t hat shall be traceable and to which extent will for each 
certified suppression system be specified by the accredited third -party testing 
laboratory/certification body.  
 
10   Marking  
      Products shall be marked (see section 10) when manufacturer's insp ection has shown that the 
requirements are fulfilled.  
 
11    Complaints  
     Complaints from customers or others in respe ct of certified products, marking, marketing etc., 
shall be documented together with details of the action taken with the documentation being 
kept available for inspection by the accredited third -party testing laboratory/certification body.  
 
12   Quality d ocuments – keeping of records  
The manufacturer shall be able to confirm, by means of collecting and retaining relevant 
documents, that the products fulfil specified requirements.  
 
Documentation of inspection and testing shall be of such an extent that th e necessary 
traceability can be assured. Records shall contain comments when results depart from those 
expected, together with descriptions of actions taken in response thereof.  
 
Archiving times shall be stated for documents relating to manufacturer's FPC .  
 
Test and inspection records shall be kept available for inspection by the accredited third -party 
testing laboratory/certification body and shall be retained for at least ten years.