How many flammability groups of building materials are established by the guest. Classification of building materials by fire hazard

There are several popular types of polystyrene-based foam, these are foamed polystyrene foam PSB-S and PSB, as well as extruded polystyrene foam EPS. They have almost identical properties, but there are some differences. PSB-S foam plastic is produced from foaming polystyrene, which contains fire retardants - these are substances that slow down the processes of ignition and combustion. Polystyrene foam with fire retardants does not support the combustion process and does not spread fire. The self-burning time is no more than 4 seconds and when the fire source is removed, the PSB-S foam stops burning - it goes out, which is why it is called self-extinguishing and is designated by the letter “C”. It has a flammability group of G1.

PSB foam cannot be distinguished from PSB-S foam; it has the same appearance, color and characteristics, but does not contain fire retardants; this is reflected in its flammability group - G3 or G4. This foam supports combustion and does not go out within 4 seconds. Extruded polystyrene EPS foam has the same flammability group, which during the combustion process forms melt drops that continue to burn.

It is also worth noting that not all products are made from mineral wool non-flammable, there are a number of mineral wool products that have flammability groups G1 and G2, this is due to the fact that the connecting elements between the mineral wool fibers are flammable polymer materials, which support the combustion process.

Construction materials according to DBN V.1.1-7-2002 “Fire safety of construction projects” are divided into non-flammable (NG) and flammable (G1-G4). The flammability group is determined according to DSTU B V.2.7-19-95 “Building materials. Combustibility testing methods" and there are four groups:

• G1 (low flammability);
• G2 (moderate flammability);
• G3 (medium flammability);
• G4 (high flammability).

To determine the flammability group, tests are carried out in the laboratory. A fire flame produced by a gas burner is directed onto the foam sample and the sample is exposed for 10 minutes. The temperature of the flue gases, the degree of damage to the sample along its length and weight, and the duration of independent combustion are measured. Depending on the obtained indicators, the material is assigned to one or another flammability group.

For materials of flammability group G1-G3, the formation of melt drops that will burn during testing is not allowed.

The flammability of polystyrene foam depends on the source raw material and is marked according to DSTU B.V.2.7-8-94 “Polystyrene foam boards. TU", like PSB or PSB-S. In the first case, foam plastic marked PSB does not contain a fire retardant and will belong to the group of increased flammability (G3 and G4). This type material is mainly used in the production of packaging, this is packaging household appliances and food products, and is called “packaging”. PSB foam plastic without the addition of a fire retardant cannot be used as a building material!!!

In the second case, foam plastic marked PSB-S (self-extinguishing) belongs to the groups of low, moderate or medium flammability. This type of material is used in construction as thermal insulation, production decorative elements or structural parts (sandwich panels, permanent formwork and so on). When using PSB-S foam in the system " wet facade"(according to DSTU B.V.2.6-36-2008 “Structures of external walls with facade thermal insulation and cladding with plasters”), the slabs must belong to flammability groups G1 or G2, polystyrene materials with other flammability cannot be used in this system!!! It is also impossible to use PSB-S slabs in the “ventilated facade” system, since according to the requirements of DSTU B.V.2.6-35-2008 “Structures of external walls with facade thermal insulation and cladding with industrial elements with ventilated air gap» This system must have non-combustible thermal insulation.

Often on the thermal insulation market you can find PSB foam without fire retardant additives, which is passed off as construction PSB-S. “Packaging foam,” as you know, is strictly forbidden to be used in construction. Why is it on the market? The answer is simple, it is more accessible and costs less than high-quality polystyrene foam. There is only one way out of this situation, to purchase polystyrene foam from trusted manufacturers who value the quality and loyalty of their customers, such as the manufacturer PE Eurobud, which constantly monitors the quality of its products. The products of the PE Eurobud company belong to the flammability group - G1 and are confirmed by the protocol of the Fire Safety Research Center.

Conclusion: Polystyrene foam that can be used in construction should be labeled as PSB-S and belong to the flammability group G1 or G2. Such foam plastic is allowed to be used in construction by both Ukrainian and European standards, in different systems thermal insulation. It should also be noted that the policy fire safety The EC is built on the basis of the “end use” conditions of the insulating material or structure. That is, the necessary fire safety characteristics are determined for the entire structural element of the building. In this connection, it is always recommended to cover polystyrene foam with a protective or sealed coating, which cannot be ignored during proper construction. Based on this, we can conclude that products made of polystyrene foam with flammability type (G1, G2) do not pose a fire hazard if they are installed in accordance with building codes and depending on their purpose.

On escape routes in buildings, except for buildings with load-bearing and enclosing structures made of wood or other G4 materials, it is not allowed to use materials with a higher fire hazard than:

G1, V1, D2, T2- for finishing walls, ceilings and filling suspended ceilings in the lobbies, staircases, elevator lobbies;

G2, V2, D3, T3 or G2, V3, D2, T2— for finishing walls, ceilings and filling suspended ceilings in common corridors, halls and foyers;

G2, RP2, D2, T2— for floor coverings in lobbies, staircases, elevator halls;

V2, RP2, D3, T2- for floor coverings in common corridors, halls and foyers.

IN production and warehouses categories A, B and B1, in which flammable liquids are produced, used or stored, floors should be made of non-combustible materials or materials of flammability group G1.

Frames of suspended ceilings in rooms and on escape routes should be made of non-combustible materials.

Fire hazard indicators of building materials

Fire danger building materials characterized by the following: flammability ( G), flammability ( IN), flame spread over the surface ( RP), smoke-forming ability ( D), toxicity ( T).

From the table above you can see that the higher the number for the group indicators, the higher the danger of this group of materials. In practice, when monitoring the values ​​of indicators, it is not necessary to remember, you just need to make sure that in the material used, the numbers for group indicators are either the same as in paragraph 6.25* of SNiP 21-01, or less.

Based on the GOST standards listed in the table, we present individual values ​​(for example) of indicators for materials used for finishing walls, ceilings and filling suspended ceilings in lobbies, staircases, and elevator lobbies:

Duration of self-combustion of group materials G1- 0 seconds, G4 more than 300 seconds:

Flue gas temperature of group materials G1- no more than 135 degrees C, G4- more than 450 degrees C;

Critical surface density heat flow in which stable flame combustion of materials occurs IN 1- 35 or more kW/sq.m;

Smoke generation coefficient of group materials D 2- over 10 to 100 incl. cubic m/kg;

Toxicity index for the group materials at an exposure time of 5 min T2- 70-210 g/cub.m.

When carrying out repairs on evacuation routes and emergency exits, you should also be guided by clause 53 of the Fire Safety Rules in the Russian Federation. PPB 01-03, prohibiting use flammable materials For finishing, cladding and wall painting and ceilings, as well as steps and landings on escape routes

(except for buildings with load-bearing and enclosing structures made of wood or other materials G4).

In Appendix B of the Recommendations for Improving Fire Safety roofing coverings main buildings of operating thermal power plants. SO 153-34.03.357-2003 provides a list of some modern materials for the reconstruction and repair of roofing coverings with subsections: waterproofing materials (with indicators G4, V2, RP4 or G4, V2, RP3) and thermal insulation materials (with indicators NG or G1 or G2, V2, D2).

Purpose of classification substances and materials on fire and explosion hazards and fire danger(Chapter 3 Article 10-13 Federal Law No. 123):

1. Classification of substances and materials by fire and explosion hazard and fire hazard is used to establish fire safety requirements for the receipt of substances and materials, use, storage, transportation, processing and disposal.

2. To establish fire safety requirements for the design of buildings, structures and fire protection systems, classification of building materials by fire hazard is used.

Classification of building materials by fire hazard (Article 13 of Federal Law No. 123).

1. Classification of building materials by fire hazard is based on their properties and ability to form fire hazards given in Table 1 of the Appendix to Federal Law No. 123.

2. Fire danger of construction materials are characterized by the following properties :
1) flammability;
2) flammability;
3) the ability to spread flame over the surface;
4) smoke generating ability;
5) toxicity of combustion products.

3. By flammability of building materials are divided into: flammable (G) and non-flammable (NG).

Construction materials include to non-flammable at the following values ​​of flammability parameters, determined experimentally: temperature increase - no more than 50 degrees Celsius, sample weight loss - no more than 50 percent, duration of stable flame combustion - no more than 10 seconds.

Construction materials that do not satisfy at least one of the above parameter values ​​are classified as to combustibles.

Combustible building materials are divided into the following groups:

1) low flammable (G1), having a flue gas temperature of no more than 135 degrees Celsius, the degree of damage along the length of the test sample is not more than 65 percent, the degree of damage along the mass of the test sample is not more than 20 percent, the duration of independent combustion is 0 seconds;

2) moderately flammable (G2), having a flue gas temperature of no more than 235 degrees Celsius, the degree of damage along the length of the test sample is not more than 85 percent, the degree of damage by weight of the test sample is not more than 50 percent, the duration of independent combustion is no more than 30 seconds;

3) normally flammable (GZ) , having a flue gas temperature of no more than 450 degrees Celsius, the degree of damage along the length of the test sample is more than 85 percent, the degree of damage along the mass of the test sample is not more than 50 percent, the duration of independent combustion is no more than 300 seconds;

4) highly flammable (G4 ), having a flue gas temperature of more than 450 degrees Celsius, the degree of damage along the length of the test sample is more than 85 percent, the degree of damage along the mass of the test sample is more than 50 percent, and the duration of independent combustion is more than 300 seconds.

For materials belonging to flammability groups G1-GZ, the formation of burning melt drops during testing is not allowed (for materials belonging to flammability groups G1 and G2, the formation of melt drops is not allowed). For non-combustible building materials, other fire hazard indicators are not determined or standardized.

By flammability of combustible building materials (including floor carpets) depending on the value of the critical surface heat flux density are divided into the following groups:

1) flame retardant (IN 1 ), having a critical surface heat flux density of more than 35 kilowatts per square meter;

2) moderately flammable (AT 2), having a critical surface heat flux density of at least 20, but not more than 35 kilowatts per square meter;

3) highly flammable (VZ), having a critical surface heat flux density of less than 20 kilowatts per square meter.

By the speed of flame spread over the surface combustible building materials (including floor carpets), depending on the value of the critical surface heat flux density, are divided into the following groups:

1) non-proliferating ( RP1 ), having a critical surface heat flux density of more than 11 kilowatts per square meter;

2) low-spreading (RP2 ), having a critical surface heat flux density of at least 8, but not more than 11 kilowatts per square meter;

3) moderate spreading ( RPZ ) having a critical surface heat flux density of at least 5 but not more than 8 kilowatts per square meter;

4) highly spreading (RP4 ), having a critical surface heat flux density of less than 5 kilowatts per square meter.

According to the smoke-forming ability of combustible building materials Depending on the value of the smoke generation coefficient, they are divided into the following groups:

1) with low smoke-generating ability (D1 ), having a smoke generation coefficient of less than 50 square meters per kilogram;

2) with moderate smoke-generating ability (D 2 ), having a smoke generation coefficient of at least 50, but not more than 500 square meters per kilogram;
3) with high smoke-generating ability (DZ), having a smoke generation coefficient of more than 500 square meters per kilogram.

According to the toxicity of combustion products, combustible building materials are divided into the following groups in accordance with Table 2 of the Appendix to Federal Law No. 123:

1) low-hazard (T1);

2) moderately dangerous ( T2);

3) highly dangerous ( TK);

4) extremely dangerous (T4).
Table 2. Classification of combustible building materials according to the toxicity index of combustion products (Appendix to Federal Law No. 123)

The fire hazard classes of building materials, depending on the fire hazard groups of building materials, are given in Table. 3 appendices to Federal Law No. 123.

Table 3. Fire hazard classes of building materials (Appendix to Federal Law No. 123)

(Table as amended, put into effect on July 12, 2012 by Federal Law of July 10, 2012 N 117-FZ.

Note. The list of fire hazard indicators for building materials sufficient to assign fire hazard classes KM0-KM5 is determined in accordance with Table 27 of the Appendix to Federal Law No. 123.

Table 27 List of indicators required to assess the fire hazard of building materials (Table as amended by Federal Law No. 123, entered into force on July 12, 2012 from July 10, 2012 N 117-FZ)

Notes:

1. The "+" sign indicates that the indicator must be applied.

2. The sign "-" means that the indicator is not applicable.3. When using waterproofing materials for the surface layer of the roof, their fire hazard indicators should be determined according to the position “Roofing materials”.

To classify building materials should be used flame propagation index value (I)- a conditional dimensionless indicator characterizing the ability of materials or substances to ignite, spread flame over the surface and generate heat.

By flame spread materials are divided into the following groups:

1) not spreading flame over the surface, having a flame propagation index of 0;

2) slowly spreading flame over the surface, having a flame spread index of no more than 20;

3) quickly spreading flame over the surface, having a flame spread index of more than 20.

Test methods for determining fire hazard classification indicators for building, textile and leather materials are established regulatory documents on fire safety.

GOST 30244-94

INTERSTATE STANDARD

CONSTRUCTION MATERIALS

FLAMMABILITY TEST METHODS

INTERSTATE SCIENTIFIC AND TECHNICAL COMMISSION
ON STANDARDIZATION AND TECHNICAL REGULATION
IN CONSTRUCTION (MNTKS)

Moscow

Preface

1 DEVELOPED by the State Central Research and Design and Experimental Institute of Complex Problems building structures and buildings named after V.A. Kucherenko (TsNIISK named after Kucherenko) and the Center for Fire Research and Thermal Protection in Construction TsNIISK (TsPIZS TsNIISK) of the Russian Federation

INTRODUCED by the Ministry of Construction of Russia

2 ADOPTED by the Interstate Scientific and Technical Commission for Standardization and Technical Regulation in Construction (INTKS) on November 10, 1993.

3 Clause 6 of this standard is the authentic text of ISO 1182-80 Fire tests - Building matrifles - Non-combustibility test Fire tests. - Construction Materials. - Non-flammability test" (Third edition 1990-12-01).

4 ENTERED INTO EFFECT on January 1, 1996 as state standard Russian Federation by Resolution of the Ministry of Construction of Russia dated August 4, 1995 No. 18-79

5 INSTEAD ST SEV 382-76, ST SEV 2437-80

INTERSTATE STANDARD

CONSTRUCTION MATERIALS

Flammability test methods

Building materials.

Methods for combustibility test

Date of introduction 1996-01-01

1 AREA OF USE

This standard establishes methods for testing building materials for flammability and their classification into flammability groups.

The standard does not apply to varnishes, paints, and other building materials in the form of solutions, powders and granules.

2 REGULATORY REFERENCES

6.3.5 The tubular furnace is installed in the center of a casing filled with insulating material (outer diameter 200 mm, height 150 mm, wall thickness 10 mm). The upper and lower parts of the casing are limited by plates that have recesses on the inside for fixing the ends of the tubular furnace. The space between the tube furnace and the walls of the casing is filled with powdered magnesium oxide with a density of (140±20) kg/m3.

6.3.6 The lower part of the tube furnace is connected to a cone-shaped air flow stabilizer 500 mm long. The internal diameter of the stabilizer should be (75±1) mm in the upper part, (10±0.5) mm in the lower part. The stabilizer is made of sheet steel 1 mm thick. Inner surface stabilizer must be polished. The seam between the stabilizer and the furnace should be tightly fitted to ensure tightness and carefully processed to eliminate roughness. The upper half of the stabilizer is insulated with outside layer of mineral fiber 25 mm thick [thermal conductivity (0.04±0.01) W/(m × K) at 20 ° WITH].

6.3.7 The upper part of the furnace is equipped with a protective screen made of the same material as the stabilizer cone. The screen height should be 50 mm, internal diameter (75±1) mm. The inner surface of the screen and the connecting seam with the furnace are carefully processed until a smooth surface is obtained. The outer part is insulated with a layer of mineral fiber 25 mm thick [thermal conductivity (0.04±0.01) W/(m × K) at 20 °C].

6.3.8 Unit consisting of a furnace, a cone-shaped stabilizer and protective screen, mounted on a frame equipped with a base and a screen to protect the lower part of the cone-shaped stabilizer from directed air flows. The height of the protective screen is approximately 550 mm, the distance from the bottom of the cone-shaped stabilizer to the base of the frame is approximately 250 mm.

6.3.9 To observe the flaming combustion of the sample, a mirror with an area of ​​300 mm 2 is installed above the furnace at a distance of 1 m at an angle of 30 °C.

6.3.10 The installation should be placed so that directed air flows or intense solar, as well as other types of light radiation did not affect the observation of the flaming combustion of the sample in the furnace.

6.3.18 Temperature is recorded throughout the experiment using appropriate instruments.

A schematic electrical diagram of the installation with measuring instruments is shown on.

6.4 Preparing the installation for testing

6.4.1 Remove the sample holder from the oven. The furnace thermocouple must be installed in accordance with.

Note- The operations described in - should be carried out during commissioning new installation or when replacing a chimney, heating element, thermal insulation, or power source.

6.5Carrying out the test

6.5.1 Remove the sample holder from the furnace, check the installation of the furnace thermocouple, and turn on the power source.

6.5.2 Stabilize the oven in accordance with.

6.5.3 Place the sample in the holder, install thermocouples in the center and on the surface of the sample in accordance with -.

6.5.4 Insert the sample holder into the oven and position it in accordance with. The duration of the operation should be no more than 5 s.

6.5.5 Start the stopwatch immediately after introducing the sample into the oven. During the test, record the readings of thermocouples in the furnace, in the center and on the surface of the sample.

6.5.6 The duration of the test is, as a rule, 30 minutes. The test is stopped after 30 minutes provided that temperature balance has been achieved by this time. Temperature balance is considered achieved if the readings of each of the three thermocouples change by no more than 2 ° C in 10 min. In this case, the final thermocouples are fixed in the furnace, in the center and on the surface of the sample.

If, after 30 minutes, temperature balance is not achieved for at least one of the three thermocouples, the test is continued, checking for temperature balance at 5-minute intervals.

6.5.7 When temperature balance is achieved for all three thermocouples, the test is stopped and its duration is recorded.

6.5.8 The sample holder is removed from the oven, the sample is cooled in a desiccator and weighed.

Residues falling from the sample during or after testing (carbonation products, ash, etc.) are collected, weighed and included in the mass of the sample after testing.

Photos of samples after testing;

Conclusion based on test results indicating what type of material it is: flammable or non-flammable;

Duration of the conclusion.

7 METHOD FOR TESTING COMBUSTIBLE BUILDING MATERIALS TO DETERMINE THEIR FLAMMABILITY GROUPS

Method II

7.1 Application area

The method is used for all homogeneous and layered combustible building materials, including those used as finishing and facing, as well as paint and varnish coatings.

7.2 Samples for testing

7.3.2 The design of the walls of the combustion chamber must ensure stability temperature regime tests established by this standard. For this purpose, it is recommended to use the following materials:

For the internal and external surfaces of the walls - sheet steel 1.5 mm thick;

For the thermal insulation layer - mineral wool slabs[density 100 kg/m 3, thermal conductivity 0.1 W/(m × K), thickness 40 mm].

7.3.3 A sample holder, ignition source, and diaphragm are installed in the combustion chamber. The front wall of the combustion chamber is equipped with a door with glazed openings. A hole with a plug for inserting thermocouples should be provided in the center of the side wall of the chamber.

7.3.4 The sample holder consists of four rectangular frames located around the perimeter of the ignition source (), and must ensure, as shown in the position of the sample relative to the ignition source, the stability of the position of each of the four samples until the end of the test. The sample holder should be installed on a support frame that allows it to move freely in a horizontal plane. The sample holder and mounting parts should not overlap the sides of the exposed surface by more than 5 mm.

7.3.5 The ignition source is gas-burner, consisting of four separate segments. Mixing of gas with air is carried out using holes located on the gas supply pipes at the entrance to the segment. The location of the burner segments relative to the sample and its circuit diagram shown on .

7.3.6 The air supply system consists of a fan, rotameter and diaphragm, and must ensure that the lower part of the combustion chamber receives an air flow uniformly distributed over its cross section in the amount of (10±1.0) m 3 /min with a temperature of at least (20 ± 2) °C.

7.3.7 The diaphragm is made of perforated steel sheet 1.5 mm thick with holes with diameters of (20 ± 0.2) mm and (25 ± 0.2) mm and located above it at a distance of (10 ± 2) mm metal mesh from wire with a diameter of no more than 1.2 mm with a mesh size of no more than 1.5 ´ 1.5 mm. The distance between the diaphragm and the upper plane of the burner must be at least 250 mm.

7.3.9 The ventilation system for removing combustion products consists of an hood installed above the exhaust pipe, an air duct and a ventilation pump.

7.3.10 To measure temperature during testing, thermocouples with a diameter of no more than 1.5 mm and corresponding recording instruments are used.

7.4 Preparing for the test

7.4.1 Preparation for testing consists of carrying out calibration in order to establish the gas flow rate (l/min) that ensures the test temperature conditions established by this standard in the combustion chamber (Table 3).

Insert the holder with the sample into the combustion chamber, turn on measuring instruments, air supply, exhaust ventilation, ignition source, close the door, record the thermocouple readings 10 minutes after turning on the ignition source.

If the temperature in the combustion chamber does not meet the requirements, repeat the calibration at other gas flow rates.

The gas flow rate established during calibration should be used during testing until the next calibration.

7.5 Carrying out the test

7.5.1 Three tests should be carried out for each material. Each of the three tests consists of simultaneous testing of four material samples.

7.5.2 Check the flue gas temperature measurement system by turning on the measuring instruments and the air supply. This operation is carried out with the combustion chamber door closed and the ignition source inoperative. The deviation of the readings of each of the four thermocouples from their arithmetic mean value should be no more than 5 ° WITH.

7.5.3 Weigh four samples, place them in the holder, and introduce it into the combustion chamber.

7.5.4 Turn on the measuring instruments, air supply, exhaust ventilation, ignition source, close the chamber door.

7.5.5 The duration of exposure of the sample to flame from the ignition source should be 10 minutes. After 10 minutes, the ignition source is turned off. If there is a flame or signs of smoldering, the duration of spontaneous combustion (smoldering) is recorded. The test is considered complete after the samples have cooled to ambient temperature.

7.5.6 After completing the test, turn off the air supply, exhaust ventilation, and measuring instruments, and remove samples from the combustion chamber.

7.5.7 For each test, the following indicators are determined:

Flue gas temperature;

Duration of independent combustion and (or) smoldering;

Length of damage to the sample;

Mass of the sample before and after testing.

7.5.8 During the test, the temperature of the flue gases is recorded at least twice per minute according to the readings of all four thermocouples installed in the flue pipe, and the duration of spontaneous combustion of the samples is recorded (in the presence of a flame or signs of smoldering).

7.5.9 During testing, the following observations are also recorded:

Time to reach maximum flue gas temperature;

Transfer of flame to the ends and unheated surface of the samples;

Through burning of samples;

Formation of a burning melt;

Appearance of samples after testing: soot deposition, color change, melting, sintering, shrinkage, swelling, warping, cracking, etc.;

Time until flame spreads along the entire length of the sample;

Duration of combustion along the entire length of the sample.

7.6 Processing test results

7.6.1 After completion of the test, measure the length of the segments of the undamaged part of the samples (along ) and determine the residual mass t to samples.

The part of the sample that is not burned or charred either on the surface or inside is considered intact. Soot deposition, change in sample color, local chipping, sintering, melting, swelling, shrinkage, warping, change in surface roughness are not considered damage.

The measurement result is rounded to the nearest 1 cm.

The undamaged part of the samples remaining on the holder is weighed. The weighing accuracy must be at least 1% of the initial mass of the sample.

7.6.2 Processing the results of one test (four samples)

7.6.2.1 Flue gas temperature T i is taken equal to the arithmetic mean of the simultaneously recorded maximum temperature readings of all four thermocouples installed in the gas outlet pipe.

7.6.2.2 The length of damage to one sample is determined by the difference between the nominal length before testing (according to ) and the arithmetic mean length of the undamaged part of the sample, determined from the lengths of its segments, measured in accordance with

The measured lengths of the segments should be rounded to 1 cm.

7.6.2.3 The length of damage to samples during testing is determined as the arithmetic mean of the damage lengths of each of the four tested samples.

7.6.2.4 Damage by mass of each sample is determined by the difference between the mass of the sample before testing and its residual mass after testing.

7.6.2.5 Damage by mass of samples is determined by the arithmetic average value of this damage for four tested samples.

7.7 Test report

7.7.1 The test report provides the following data:

Test date;

Name of the laboratory conducting the test;

Customer's name;

Name of material;

Code of technical documentation for the material;

Description of the material indicating the composition, manufacturing method and other characteristics;

The name of each material that is integral part layered material, indicating the layer thickness;

Method of making a sample, indicating the base material and method of fastening;

Additional observations during testing;

Characteristics of the exposed surface;

Test results (flammability parameters according to);

Photo of the sample after testing;

Conclusion based on test results on the flammability group of the material.

For materials tested in accordance with and, indicate the flammability groups for all cases established by these paragraphs;

Duration of the conclusion.

APPENDIX A

(required)

INSTALLATION FOR TESTING BUILDING MATERIALS FOR NON-COMBUSTIBILITY (method - thermocouple in the center of the sample;T s - thermocouple on the surface of the sample; 1 - stainless steel tube; 2 - mesh (mesh size 0.9 mm, wire diameter 0.4 mm)

Figure A3 - Sample holder

1 - wooden handle; 2 - weld

T f- furnace thermocouple; T S - thermocouple in the center of the sample;T s - thermocouple on the surface of the sample; 1 - furnace wall; 2 - mid-height of the constant temperature zone; 3 - thermocouples in a protective casing; 4 - contact of thermocouples with material

Figure A5 - Relative position of the furnace, sample and thermocouples

New class of LINOLEUM KM2 V2, D2, T2, RP1

According to the changes in Federal law(hereinafter referred to as Federal Law No. 117) applications vinyl linoleum KM2 in hospitals, schools and pre-school, general education institutions have been significantly expanded.

New fire hazard requirements for floor coverings

HOMOGENEOUS LINOLEUM KM2

HETEROGENEOUS LINOLEUM KM2

The flammability group is no longer required for floor coverings linoleum (G1, G2, G3, G4)

Notes: 1. The "+" sign indicates that the indicator must be applied.

2. The sign "-" indicates that the indicator is not applicable.

You can also use PVC coverings, commercial linoleum, in most premises that are considered evacuation routes.

Everything you need to know, articles on how to choose flooring