UNI CEI 11170-3 Railway and tramway vehicles Guidelines for fire protection of railway, tramway and guided path vehicles Evaluation of fire behaviour of materials – Limits of acceptance

1. PURPOSE AND SCOPE OF APPLICATION

This part of the standard defines the test methods for evaluating the materials fire behaviour on a laboratory scale, as well as their evaluation criteria referred to the specific conditions of use and the vehicle’s particular  operating class and type.

The characteristics of a fire are quite different depending on the ignition source for the material concerned as well as the surrounding materials, the ambient characteristics and fire dynamics, the ambient conditions and layout, the ventilation conditions, etc.

The evaluation and classification of materials in accordance with the procedures defined in this part of the standard do therefore not aim at establishing the absolute levels for the risks of fires caused by the materials
installed: they aim at providing instructions capable of reducing the fire hazard on the vehicles and protect both the passengers and the crew as best as possible.

The test methods specified in this standard shall be applied to all the materials and components (both structural and non-structural) used both to make new vehicles and to renovate the vehicles currently being operated, as well as to the materials/components used to manufacture the ordinary spare parts.

The tests described in this standard need not be performed on the combustible products fitted to a vehicle according to the criteria below:
– products with a unit mass of less than 100 g, which are incorporated into pneumatic, electro-pneumatic, mechanical, electro-mechanical, electric and electronic pieces of equipment contained in enclosed metal cases that cannot be accessed both by the crew and the passengers, which are positioned inside the vehicle body;

– products with a unit mass of less than 1,000 g, which are incorporated into pneumatic, electro-pneumatic, mechanical, electro-mechanical, electric and electronic pieces of equipment contained in enclosed metal cases that cannot be accessed both by the crew and the passengers, which are positioned outside the vehicle body .
Any other integration or explanation may be specified in the product’s technical specifications concerning the
individual materials.

2. REFERENCE STANDARDS

This standard refers, by means of special mention (which may bear a date), to various provisions included in other publications.

These reference standards are quoted at the relevant points in the text and are listed below. As regards the references bearing dates, any subsequent modification or revision made to the concerned publications will apply only if they are introduced into this standard as updates or revisions. As regards the references that do not bear dates, the latest edition of the publication referred to will apply.

UNI 5114 Woven and unwoven items – Determining the linear density and the mass per length unit.

UNI 8456 Combustible materials liable to be hit by the flames on both sides – Fire reaction through contact with a small  flame.

UNI 8457 Combustible materials liable to be hit by the flames on one side only –Fire reaction through contact with a small flame.

UNI 9174 Fire reaction on the materials exposed to the action of an igniting flame in the presence of radiating heat.

UNI 9175 Fire reaction on padded furniture exposed to the action of a small flame.

UNI 9177 Fire reaction classification for combustible materials.

UNI 9796 Fire reaction on the fireproof painting products applied to woody materials – Test method and classification.

UNI EN ISO 1716 Fire reaction tests on construction materials – Determining the calorific value.

UNI EN ISO 9000 Quality control systems – Basic concepts and terminology.

UNI EN ISO 11925-2 Fire reaction tests – Ignitability of construction products exposed to direct attack from a flame – Part 2: Test performed by using one single flame.

UNI EN ISO 1182 Fire reaction tests on construction products. Non-combustibility test.

UNI CEI 11170-1 Railway and tramway vehicles – Guidelines for fire protection of railway,tramway and guided path vehicles – Part 1: General principles.

UNI CEI 11170-2 Railway and tramway vehicles – Guidelines for fire protection of railway, tramway and guided path vehicles – Part 2: Design criteria – Measures for fire restraining – Signalling, control and evacuation systems.

UNI CEI EN ISO/IEC 17025 General requirements for test and calibration laboratory expertise.

UNI CEI EN ISO/IEC 17050-1 Evaluation of conformity – Declaration of conformity issued by the supplier. Part 1: general requirements.

ISO 5660-1 Fire reaction tests – Heat release, smoke production and mass loss rate – Part 1: Heat release rate (cone calorimeter method).

CEI 20-37/7 Tests performed on the gas emitted during the combustion of electric cables and cable materials. Part 7: Determining the degree of toxicity of the gas released from the cables

CEI EN 50265-1 Common test methods for cables being set on fire – Testing the nonvertical flame propagation on one single insulated cable or conductor –Part 1: Test equipment.

CEI EN 50265-2-1 Common test methods for cables being set on fire – Testing the nonvertical flame propagation on one single insulated cable or conductor –Part 2-1: Test procedures – Pre-mixed 1 kW flame.

CEI EN 50265-2-2 Common test methods for cables being set on fire – Testing the nonvertical flame propagation on one single insulated cable or conductor –Part 2-2: Test procedures – Diffuse flame.

CEI EN 50266 Common test methods for cables being set on fire – Testing the vertical flame propagation on wire or cable harnesses fitted in vertical position.

EI EN 50267-2-1 Common test methods for cables being set on fire – Tests performed on the gas emitted during the combustion of materials collected from the cables – Part 2-1: Test procedures – Determining the amount of gaseous halogen acid.

CEI EN 50267-2-2 Common test methods for cables being set on fire – Tests performed on the gas emitted during the combustion of materials collected from the cables – Part 2-2: Test procedures – Determining the degree of acidity (corrosiveness) of the gas released from the materials by measuring the pH and the conductivity.

CEI EN 50268-2 Common test methods for cables being set on fire – Measuring the smoke density of cables burning under defined conditions – Part 2: Test procedures.

CEI EN 50305 Railway, tramway, trolleybus and underground applications – Cables featuring special requirements under fire conditions – Test methods.

CEI EN 50306-1 Railway, tramway, trolleybus and underground applications – Rolling stock cables featuring special fire behaviour characteristics – Small thickness – Part 1: General prescriptions.

CEI EN 50306-2 Railway, tramway, trolleybus and underground applications – Rolling stock cables featuring special fire behaviour characteristics – Small thickness – Part 2: Single-pole cables.