Regulation No. 34-02

Name:Regulation No. 34-02
Description:Fire Risk Prevention.
Official Title:Uniform Provisions Concerning the Approval of: Vehicles with Regard to the Prevention of Fire Risks.
Country:ECE - United Nations
Date of Issue:1975-07-01
Amendment Level:02 Series, Corrigendum 2, Revision 2
Number of Pages:37
Vehicle Types:Bus, Car, Component, Heavy Truck, Light Truck, Trailer
Subject Categories:Prior Versions
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Keywords:

approval, tank, vehicle, fuel, regulation, test, type, part, tanks, paragraph, liquid, approved, amendments, series, collision, tests, installation, accessories, requirements, pursuant, annex, number, vehicles, date, mark, manufacturer, means, prescribed, technical, granted, made, fire, case, entry, force, filler, pressure, conditions, material, pan, regard, service, parts, capacity, cap, appendix, filled, position, submitted, barrier

Text Extract:

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E/ECE/324
) Rev.1/Add.33/Rev.2/Corr.2
E/ECE/TRANS/505 )
June 30, 2015
STATUS OF UNITED NATIONS REGULATION
ECE 34-02
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF:
VEHICLES WITH REGARD TO THE PREVENTION OF FIRE RISKS
Incorporating:
00 series of amendments
Date of Entry into Force: 01.07.75
01 series of amendments
Date of Entry into Force: 18.01.79
02 series of amendments
Date of Entry into Force: 16.07.03
Supplement 1 to the 02 series of amendments
Date of Entry into Force: 12.08.04
Supplement 2 to the 02 series of amendments
Date of Entry into Force: 11.06.07
Supplement 3 to the 02 series of amendments
Date of Entry into Force: 24.10.09
Supplement 4 to the 02 series of amendments
Date of Entry into Force: 26.07.12
Supplement 5 to the 02 series of amendments
Date of Entry into Force: 18.11.12
Corr.1 to Revision 2 of the Regulation
Dated: 11.09.13
Corr.2 to Revision 2 of the Regulation
Dated: 30.06.15

REGULATION NO. 34
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF VEHICLES
WITH REGARD TO THE PREVENTION OF FIRE RISKS
CONTENTS
REGULATION
1. Scope
2. Application for Approval
3. Approval
4. Definitions
PART I
APPROVAL OF VEHICLES WITH REGARDS TO THEIR FUEL TANKS
5. Requirements for liquid fuel tanks
6. Test of liquid fuel tanks
7. Definitions
PART II
APPROVAL OF VEHICLES WITH REGARD TO THE PREVENTION OF
FIRE RISKS IN THE EVENT OF COLLISION
8. Requirements for the installation of liquid fuel tanks
9. Tests on the vehicle
10. Definitions
PART III
APPROVAL OF TANKS FOR LIQUID FUEL AS SEPARATE TECHNICAL UNITS
11. Requirements for liquid fuel tanks

REGULATION NO. 34
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF VEHICLES
WITH REGARD TO THE PREVENTION OF FIRE RISKS
1. SCOPE
This Regulation applies:
1.1.
PART I: To the approval of vehicles of Categories M, N and O
with regard to the tank(s)
for liquid fuel.
1.2. PART II: At the request of the manufacturer to the approval of vehicles of Categories M, N,
and O approved to Part I or IV of this Regulation fitted with liquid fuel tank(s) with regard to
the prevention of fire risks in the event of a frontal and/or lateral and/or rear collision.
1.3. PART III: To the approval of tanks for liquid fuel as technical units.
1.4. PART IV: To the approval of vehicles with regard to the installation of approved tanks for
liquid fuel.
2. APPLICATION FOR APPROVAL
2.1. Application for approval pursuant to Part I and/or Part II of this Regulation.
2.1.1. The application for approval of a vehicle type to a Part I or Part II of this Regulation shall be
submitted by the vehicle manufacturer or by his duly accredited representative.
2.1.2. It shall be accompanied by the undermentioned documents in triplicate and by the following
particulars:
2.1.2.1. A detailed description of the vehicle type with respect to the items specified in Paragraph 4.2
and/or 7.2. The numbers and/or symbols identifying the engine type and the vehicle type
shall be specified;
2.1.2.2. Drawing(s) showing the characteristics of the fuel tank and specifying the material from
which it is made;
2.1.2.3. A diagram of the entire fuel feed systems, showing the site of each component on the
vehicle; and
2.1.2.4. For application pursuant to Part II of this Regulation, a diagram of the electrical installation,
showing its siting and its mode of attachment to the vehicle.
2.1.3. The following shall be submitted to the technical service responsible for conducting the
type-approval tests:
2.1.3.1. A vehicle representative of the vehicle type to be approved or the parts of the vehicle which
the technical service deems necessary for approval tests;

2.3.2.3. A list of all types of tanks for liquid fuel approved pursuant to Part III of this Regulation and
intended to be fitted to the type of vehicle.
2.3.3. The following shall be submitted to the Technical Service responsible for conducting the
type-approval tests:
2.3.3.1. A vehicle representative of the type of vehicle to be approved;
2.3.3.2. If necessary, two additional tanks with their accessories in the case of each type of fuel tank
approved without its accessories.
3. APPROVAL
3.1. Approval pursuant to Part I and/or Part II of this Regulation.
3.1.1. If the vehicle submitted for approval pursuant to this Regulation meets the requirements of
Parts I and/or Part II below, approval of that vehicle type shall be granted.
3.1.2. Each type approved shall be assigned an approval number whose first two digits shall
constitute the number of the most recent series of amendments incorporated in the
Regulation on the date of issue of the approval. A Contracting Party may however assign the
same approval number to several vehicle types as defined in Paragraph 4.2 and/or 7.2 if the
types are variants of the same basic model and provided that each type is separately tested
and found to comply with the conditions of this Regulation.
3.1.3. Notice of approval or of refusal of approval of a vehicle type pursuant to this Regulation shall
be communicated to the Parties to the Agreement which apply this Regulation by means of a
form conforming to the model in Annex 1, Appendix 1 to this Regulation and of drawings,
giving the particulars referred to in Paragraphs 2.1.2.2., 2.1.2.3 and 2.1.2.4 above (supplied
by the applicant for approval) in a format not exceeding A4 (210 × 297mm) or folded to that
format and on an appropriate scale.
3.1.4. There shall be affixed, conspicuously and in a readily accessible place specified on the
approval form, to every vehicle conforming to a vehicle type approved under this Regulation,
an international approval mark consisting of:
3.1.4.1. A circle surrounding the Letter "E" followed by the distinguishing number of the country
which has granted approval;
3.1.4.2. The number of this Regulation, followed by "RI", if the vehicle is approved pursuant to Part I
of the Regulation, or by "RII" if the vehicle is approved pursuant to Parts I or IV and to Part II
of the Regulation, a dash and the approval number to the right of the circle prescribed in
Paragraph 3.1.4.1.
3.1.5. If the vehicle conforms to a vehicle type approved, under one or more other Regulations
annexed to the Agreement, in the country which has granted approval under this Regulation,
the symbol prescribed in Paragraph 3.1.4.1 need not be repeated; in such a case the
additional numbers, approval numbers and symbols of all the Regulations under which
approval has been granted in the country which has granted approval under this Regulation
shall be placed in vertical columns to the right of the symbol prescribed in Paragraph 3.1.4.1.

3.3. Approval pursuant to Part IV of this Regulation
3.3.1. If the vehicle submitted for approval pursuant to this Regulation meets the requirements of
Part IV below, approval of that vehicle type shall be granted.
3.3.2. Each type approved shall be assigned an approval number whose first two digits shall
constitute the number of the most recent series of amendments incorporated in the
Regulation on the date of issue of the approval. A Contracting Party may however assign
the same approval number to several vehicle types as defined in Paragraph 12.2. if the
types are variants of the same basic model and provided that each type is separately tested
and found to comply with the conditions of this Regulation.
3.3.3. Notice of approval or of refusal of approval of a vehicle type pursuant to this Regulation
shall be communicated to the Contracting Parties to the Agreement which apply this
Regulation by means of a form conforming to the model in Annex 1, Appendix 1 to this
Regulation and of drawings, giving the particulars referred to in Paragraphs 2.3.2.1., 2.3.2.2.
and 2.3.2.3. above (supplied by the applicant for approval) in a format not exceeding
A4 (210 × 297mm) or folded to that format and on an appropriate scale.
3.3.4. There shall be affixed, conspicuously and in a readily accessible place specified on the
approval form, to every vehicle conforming to a vehicle type approved under this Regulation,
an international approval mark consisting of:
3.3.4.1. A circle surrounding the Letter "E" followed by the distinguishing number of the country
which has granted approval;
3.3.4.2. The number of this Regulation, followed "RIV", a dash and the approval number to the right
of the circle prescribed in Paragraph 3.3.4.1.
3.3.5. If the vehicle conforms to a vehicle type approved, under one or more other Regulations
annexed to the Agreement, in the country which has granted approval under this
Regulation, the symbol prescribed in Paragraph 3.3.4.1. need not be repeated; in such a
case the additional numbers, approval numbers and symbols of all the Regulations under
which approval has been granted in the country which has granted approval under this
Regulation shall be placed in vertical columns to the right of the symbol prescribed in
Paragraph 3.3.4.1.
3.3.6. The approval mark shall be clearly legible and indelible.
3.3.7. The approval mark shall be placed close to or on the vehicle data plate affixed by the
manufacturer.
3.3.8. Annex 2 to this Regulation gives examples of arrangements of the approval mark.

5.5. The tank(s) shall not be situated in, or from, a surface (floor, wall, bulkhead) of the
passenger compartment or other compartment integral with it.
5.6. A partition shall be provided to separate the occupant compartment from the tank(s). The
partition may contain apertures (e.g. to accommodate cables) provided they are so arranged
that fuel cannot flow freely from the tank(s) into the occupant compartment or other
compartment integral with it during normal conditions of use.
5.7. Every tank shall be securely fixed and so placed as to ensure that any fuel leaking from the
tank or its accessories will escape to the ground and not into the occupant compartment
during normal conditions of use.
5.8. The filler hole shall not be situated in the occupant compartment, in the luggage
compartment or in the engine compartment.
5.9. The fuel shall not escape through the tank cap or through the devices provided to
compensate excess pressure during the foreseeable course of operation of the vehicle. In
the case of overturning of the vehicle, a drip may be tolerated provided that it does not
exceed 30g/min; this requirement shall be verified during the test prescribed in
Paragraph 6.2.
5.9.1. The fuel filler cap shall be fixed to the filler pipe.
5.9.1.1. The requirements of Paragraph 5.9.1 shall be deemed to be satisfied if provision is made to
prevent excess evaporative emissions and fuel spillage caused by a missing fuel filler cap.
This may be achieved using one of the following:
5.9.1.1.1. An automatically opening and closing, non-removable fuel filler cap,
5.9.1.1.2. Design features which avoid excess evaporative emissions and fuel spillage in the case of a
missing fuel filler cap,
5.9.1.1.3. Any other provision which has the same effect. Examples may include, but are not limited
to, a tether filler cap, a chained filler cap or one utilising the same locking key for the filler
cap and for the vehicle's ignition. In this case, the key shall be removable from the filler cap
only in the locked condition. However, the use of tethered or chained filler cap by itself is not
sufficient for vehicles other than those of Categories M and N .
5.9.2. The seal between the cap and the filler pipe shall be retained securely in place. The cap
shall latch securely in place against the seal and filler pipe when closed.
5.10. Tanks shall be installed in such a way as to be protected from the consequences of a
collision to the front or the rear of the vehicle; there shall be no protruding parts, sharp
edges, etc. near the tank.

7. DEFINITIONS
PART II
APPROVAL OF VEHICLES WITH REGARD TO THE PREVENTION OF
FIRE RISKS IN THE EVENT OF COLLISION
For the purposes of this Part of the Regulation:
7.1. "Approval of a vehicle" means the approval of a vehicle type with regard to the prevention
of fire risks;
7.2. "Vehicle type" means vehicles which do not differ in such essential respects as:
7.2.1. The structure, shape, dimensions and materials (metal/plastic) of the tank(s);
7.2.2. In vehicles of Category M the position of the tank(s) in the vehicle in so far as it has a
negative effect on the requirements of Paragraph 5.10;
7.2.3. The characteristics and siting of the fuel feed system (pump, filters, etc.); and
7.2.4. The characteristics and siting of the electrical installation in so far as they have an effect on
the results of the collision tests prescribed in this Regulation;
7.3. "Transverse plane" means the vertical transverse plane perpendicular to the median
longitudinal plane of the vehicle;
7.4. "Unladen mass" means the mass of the vehicle in running order, unoccupied and unladen
but complete with fuel, coolant, lubricants, tools and a spare wheel (if provided as standard
equipment by the vehicle manufacturer);
8. REQUIREMENTS FOR THE INSTALLATION OF LIQUID FUEL TANKS
8.1. Fuel Installation
8.1.1. The vehicles shall be approved according to either Part I or Part IV of this Regulation.
8.1.2. The components of the fuel installation shall be adequately protected by parts of the frame
or bodywork against contact with possible obstacles on the ground. Such protection shall
not be required if the components beneath the vehicle are further from the ground than the
part of the frame or bodywork in front of them.
8.1.3. The pipes and all other parts of the fuel installation shall be accommodated on the vehicle at
sites protected to the fullest possible extent. Twisting and bending movements, and
vibrations of the vehicle's structure or drive unit, shall not subject the components of the fuel
installation to friction, compression or any other abnormal stress.

PART III
APPROVAL OF TANKS FOR LIQUID FUEL AS SEPARATE TECHNICAL UNITS
10. DEFINITIONS
For the purposes of this Part of the Regulation:
10.1. "Tank" means the tank(s) designed to contain the liquid fuel, as defined in Paragraph 10.3.,
used primarily for the propulsion of the vehicle; the tank may be approved either with or
without its accessories (filler pipe, if it is a separate element, filler hole, cap, gauge,
connections to compensate interior excess pressure, etc.);
10.2. "Capacity of the fuel tank" means the fuel tank capacity as specified by the tank
manufacturer;
10.3. "Liquid fuel" means a fuel which is liquid in normal conditions of temperature and pressure;
10.4. "Approval of a tank" means the approval of a type of liquid fuel tank;
10.5. "Type of tank" means tanks which do not differ in such essential respects as:
10.5.1. The structure, shape, dimensions and material (metal/plastic) of the tank(s);
10.5.2. The intended use of the tank: universal use or specific vehicle use;
10.5.3. The presence or absence of the accessories.
11. REQUIREMENTS FOR LIQUID FUEL TANKS
11.1. The requirements stated in Paragraphs 5.1., 5.2., 5.3., 5.9., 5.12., 6.1. and 6.2. above shall
be complied with when the tanks are equipped with the accessories that are normally
attached to them.
11.2. In case the tanks are to be approved without their accessories the manufacturer's
documentation shall clearly identify the accessories used for the test.

15. CONFORMITY OF PRODUCTION
The Conformity of Production procedures shall comply with those set out in the Agreement,
Appendix 2 (E/ECE/324-E/ECE/TRANS/505/Rev.2), with the following requirements:
15.1. Every vehicle or tank bearing an approval mark as prescribed under this Regulation shall
conform to the vehicle type approved and satisfy the requirements of the respective Parts
above.
15.2. In order to verify conformity as prescribed in Paragraph 15.1 above, a sufficient number of
serially-produced vehicles or tanks bearing the approval mark required by this Regulation
shall be subjected to random checks.
15.3. As a general rule, the conformity of the vehicle or tank with the approved type shall be
checked on the basis of the description given in the approval form and its Annexes.
However, the vehicle or tank shall if necessary be subjected to the checks prescribed in
Paragraph 6 above.
16. PENALTIES FOR NON-CONFORMITY OF PRODUCTION
16.1. The approval granted in respect of a type of vehicle or tank pursuant to this Regulation may
be withdrawn if the requirement laid down in Paragraph 15.1. above is not complied with or
if the vehicle has failed to pass the checks prescribed in Paragraph 9 above.
16.2. If a Contracting Party to the Agreement which applies this Regulation withdraws an approval
it has previously granted, it shall forthwith notify the other Parties to the Agreement which
apply this Regulation thereof by means of a copy of the communication form conforming to
the model in Annexes 1 or 2 to this Regulation.
17. TRANSITIONAL PROVISIONS
17.1. As from the official date of entry into force of the 02 series of amendments, no Contracting
Party applying this Regulation shall refuse to grant ECE approval under this Regulation as
amended by the 02 series of amendments.
17.2. As from 12 months after the date of entry into force of the 02 series of amendments,
Contracting Parties applying this Regulation shall grant ECE approvals only if vehicle type to
be approved meets the requirements of this Regulation as amended by the 02 series of
amendments.
17.3. Until 12 months after the date of entry into force of the 02 series of amendments to this
Regulation, no Contracting Party applying this Regulation shall refuse national type approval
of a vehicle type approved to the preceding series of amendments to this Regulation.
17.4. Starting 24 months after the entry into force of the 02 series of amendments to this
Regulation, Contracting Parties applying this Regulation may refuse first national
registration (first entry into service) of a vehicle which does not meet the requirements of the
02 series of amendments to this Regulation.
17.5. As from the official date of entry into force of the Supplement 3 to the 02 series of
amendments, no Contracting Party applying this Regulation shall refuse to grant
ECE approval under this Regulation as amended by Supplement 3 to the 02 series of
amendments.

ANNEX 1 – APPENDIX 1
COMMUNICATION
(Maximum format: A4 (210 × 297mm)
Issued by:
Name of administration:
.......................................
.......................................
.......................................
concerning:
Approval granted
Approval extended
Approval refused
Approval withdrawn
Production definitively discontinued
of a vehicle type with regard:
To the tank for liquid fuel
To the prevention of fire risks in the event of
frontal/lateral/rear collision
Pursuant to Regulation No. 34.
Approval No. .................................................. Extension No: ..........................................................
1. Trade name or mark of the power-driven vehicle: .........................................................................
2. Vehicle type: ...................................................................................................................................
3. Manufacturer's name and address: ................................................................................................
4. If applicable, name and address of manufacturer's representative: ..............................................
........................................................................................................................................................
5. Kind of engine: positive-ignition/diesel
6. Site of engine: front/rear/centre
7. Brief description of fuel tank and fuel or approval number(s) of the approved fuel tank : ..........
7.1. Characteristics and site of fuel tank: ..............................................................................................
........................................................................................................................................................

ANNEX 1 – APPENDIX 2
COMMUNICATION
(Maximum format: A4 (210 × 297mm)
Issued by:
Name of administration:
.......................................
.......................................
.......................................
concerning:
Approval granted
Approval extended
Approval refused
Approval withdrawn
Production definitively discontinued
of a fuel tank pursuant to Regulation No. 34.
Approval No. .................................................. Extension No: ..........................................................
1. Trade name or mark of the fuel tank: .............................................................................................
2. Manufacturer's name for the type of fuel tank: ...............................................................................
3. Manufacturer's name and address: ................................................................................................
4. If applicable, name and address of manufacturer's representative: ..............................................
........................................................................................................................................................
5. Brief description of fuel tank and fuel of the fuel feeding installation: ............................................
5.1. Characteristics of fuel tank and fuel: ..............................................................................................
5.2. For fuel tanks made of a plastic material, state material and trade name or mark: .......................
........................................................................................................................................................
6. Submitted for approval on: .............................................................................................................
7. Technical Service responsible for conducting approval tests: .......................................................
8. Date of report issued by that Service: ............................................................................................
9. Number of report issued by that Service: .......................................................................................
10. Reason(s) for extension (if applicable): .........................................................................................

ANNEX 2
ARRANGEMENTS OF APPROVAL MARKS
Model A
(See Paragraph 3.1.4 of this Regulation)
The above approval mark affixed to a vehicle shows that the type concerned was approved in the
Netherlands (E4) pursuant to Part I of Regulation No. 34 under approval No. 021234. The first two digits
(02) of the approval number indicate that the approval was granted in accordance with the requirements
of Regulation No. 34 as amended by the 02 series of amendments.
Model B
(See Paragraph 3.1.5 of this Regulation)
The above approval mark affixed to a vehicle shows that the type concerned was approved in the
Netherlands (E4) pursuant to Regulations Nos. 34 Parts I or IV and II and 33. The approval numbers
indicated that, at the date when the respective approvals were given, Regulation No. 34 included the
02 series of amendments and Regulation No. 33 was still in its original form.

Model E
(See Paragraph 3.3.5 of this Regulation)
The above approval mark affixed to a vehicle shows that the type concerned was approved in the
Netherlands (E4) pursuant to Regulations Nos. 34 Part IV and 33 . The approval numbers indicated
that, at the date when the respective approvals were given, Regulation No. 34 included the 02 series of
amendments and Regulation No. 33 was still in its original form.

2.5. Velocity on Collision
The velocity on collision shall be between 48,3km/h and 53,1km/h. However, if the test has
been carried out at a higher collision velocity and the vehicle has satisfied the conditions
prescribed, the test shall be considered satisfactory.
2.6. Measuring Instruments
The instrument used to record the speed referred to in Paragraph 2.5 above shall be
accurate to within 1%.
3. EQUIVALENT TEST METHODS
3.1. Equivalent test methods are permitted provided that the conditions referred to in this
Regulation can be observed either entirely by means of the substitute test or by calculation
from the results of the substitute test.
3.2. If a method other than that described in Paragraph 2 above is used its equivalence shall be
demonstrated.

2.4.2. The velocity of collision shall be between 35 and 38km/h.
2.4.3. The aggregate weight (mass) of carriage and impactor shall be 1,100 ± 20 kg.
2.5. Special Provisions Applicable where a Pendulum is used
2.5.1. The distance between the centre of the impacting face and the axis of rotation of the
pendulum shall be not less than 5 m.
2.5.2. The impactor shall be freely suspended by rigid arms rigidly secured to it. The pendulum so
constituted shall be substantially incapable of being deformed by the collision.
2.5.3. Arresting gear shall be incorporated in the pendulum to prevent any secondary collision by
the impactor on the test vehicle.
2.5.4. At the moment of collision the velocity of the centre of percussion of the pendulum should
be between 35 and 38km/h.
2.5.5. The reduced mass "m " at the centre of percussion of the pendulum is defined as a function
of the total mass "m", of the distance "a" between the centre of percussion and the axis of
rotation, and of the distance "l" between the centre of gravity and the axis of rotation, by the
following equation:
m = m (1/a)
2.5.6. The reduced mass m shall be 1,100 ± 20 kg.
2.6. General Provisions Relating to the Mass and Velocity of the Impactor
If the test has been conducted at a collision velocity higher than those prescribed in
Paragraphs 2.4.2 and 2.5.4 and/or with a mass greater than those prescribed in
Paragraphs 2.4.3 and 2.5.6., and the vehicle has met the requirements prescribed, the test
shall be considered satisfactory.
2.7. State of Vehicle Under Test
2.7.1. The vehicle under test shall either be fitted with all the normal components and equipment
included in its unladen kerb weight or be in such condition as to fulfil this requirement so far
as the components and equipment affecting fire risks are concerned.
2.7.2. The fuel tank shall be filled to at least 90% of its capacity either with fuel or with a
non-inflammable liquid having a density and a viscosity close to those of the fuel normally
used. All other systems (brake-fluid header tanks, radiator, etc.) may be empty.
2.7.3. A gear may be engaged and the brakes may be applied.

ANNEX 5
TESTING OF FUEL TANKS MADE OF A PLASTIC MATERIAL
1. COLLISION RESISTANCE
1.1. The tank shall be filled to its rated capacity with a water-glycol mixture or with another liquid
having a low freezing point, which does not change the properties of the tank material, and
shall then be subjected to a perforation test.
1.2. During this test the tank temperature shall be 233K ± 2K (-40°C ± 2°C).
1.3. A pendulum collision testing fixture shall be used for the test. The collision body shall be of
steel and have the shape of a pyramid with equilateral-triangle faces and a square base, the
summit and the edges being rounded to a radius of 3mm. The centre of percussion of the
pendulum shall coincide with the centre of gravity of the pyramid; its distance from the axis
of rotation of the pendulum shall be 1m. The total mass of the pendulum shall be 15 kg. The
energy of the pendulum at the moment of collision shall be not less than 30Nm and as close
to that value as possible.
1.4. The tests shall be made on the points of the tank which are regarded as vulnerable to frontal
or rear collisions. The points regarded as vulnerable are those which are most exposed or
weakest having regard to the shape of the tank or the way in which it is installed on the
vehicle. The points selected by the laboratories shall be indicated in the test report.
1.5. During the test, the tank shall be held in position by the fittings on the side or sides opposite
the side of collision. No leak shall result from the test.
1.6. At the choice of the manufacturer, all the impact tests may be carried out on one tank or
each may be carried out on a different tank.
2. MECHANICAL STRENGTH
The tank shall be tested under the conditions prescribed in Paragraph 6.1 of this Regulation
for leaks and for rigidity of shape. The tank and all its accessories shall be mounted onto a
test fixture in a manner corresponding to the mode of installation on the vehicle for which
the tank is intended or mounted in the vehicle itself or mounted in a test fixture made by a
vehicle section. On request of the manufacturer and with the agreement of the Technical
Service the tank may be tested without using any test fixture. Water at 326K (53°C) shall be
used as the testing fluid and shall fill the tank to its capacity. The tank shall be subjected to
a relative internal pressure equal to double the working pressure and in any case to not less
than 30kPa at a temperature of 326K ± 2K (53°C ± 2°C) for a period of 5h. During the test,
the tank and its accessories shall not crack or leak; however it may be permanently
deformed.
3. FUEL PERMEABILITY
3.1. The fuel used for the permeability test shall be either the reference fuel specified in
Regulation No. 83, Annex 9, or a commercial premium-grade fuel. If the tank is only
designed for installation on vehicles with a compression-ignition engine, the tank shall be
filled with diesel fuel.

5.4. The pan dimensions shall be chosen so as to ensure that the sides of the fuel tank are
exposed to the flame. The pan shall therefore exceed the horizontal projection of the tank by
at least 20 cm, but not more than 50 cm. The side walls of the pan shall not project more
than 8 cm above the level of the fuel at the start of the test.
5.5. The pan filled with fuel shall be placed under the tank in such a way that the distance
between the level of the fuel in the pan and the tank bottom corresponds to the design
height of the tank above the road surface at the unladen mass (see Paragraph 7.4). Either
the pan, or the testing fixture, or both, shall be freely moveable.
5.6. During Phase C of the test, the pan shall be covered by a screen placed 3 cm ± 1 cm above
the fuel level.
The screen shall be made of a refractory material, as prescribed in Appendix 2. There shall
be no gap between the bricks and they shall be supported over the fuel pan in such a
manner that the holes in the bricks are not obstructed. The length and width of the frame
shall be 2 cm to 4 cm smaller than the interior dimensions of the pan so that a gap of 1 cm
to 2 cm exists between the frame and the wall of the pan to allow ventilation.
5.7. When the tests are carried out in the open air, sufficient wind protection shall be provided
and the wind velocity at fuel pan level shall not exceed 2,5km/h. Before the test the screen
shall be heated to 308K ± 5K (35°C ± 5°C). The fire bricks may be wetted in order to
guarantee the same test conditions for each successive test.
5.8. The test shall comprise four phases (see Appendix 1):
5.8.1. Phase A: Pre-heating (Figure 1)
The fuel in the pan shall be ignited at a distance of at least 3 m from the tank being tested.
After 60 seconds preheating, the pan shall be placed under the tank.
5.8.2. Phase B: Direct Exposure to Flame (Figure 2)
For 60 seconds the tank shall be exposed to the flame from the freely burning fuel.
5.8.3. Phase C: Indirect Exposure to Flame (Figure 3)
As soon as Phase B has been completed, the screen shall be placed between the burning
pan and the tank. The tank shall be exposed to this reduced flame for a further 60 seconds.
5.8.4. Phase D: End of Test (Figure 4)
The burning pan covered with the screen shall be moved back to its original position
(Phase A). If, at the end of the test, the fuel tank is burning, the fire shall be extinguished
forthwith.
5.9. The results of the test shall be considered satisfactory if no liquid fuel is leaking from the
tank.

ANNEX 5 – APPENDIX 1
TEST OF RESISTANCE TO FIRE
Figure 1
Phase A: Pre-heating
Figure 2
Phase B: Direct Exposure to Flame
Figure 3
Phase C: Indirect Exposure to the Flame

ANNEX 5 – APPENDIX 2
DIMENSIONS AND TECHNICAL DATA OF FIREBRICKS
Fire resistance (Seger-Kegel) SK 30
A1 O content 30–33%
Open porosity (P )
Density
20–22% vol.
1 900–2 000 kg/m
Effective holed area 44,18%
Fire Risk Prevention.