IMO Resolution MSC 61(67): Annex 1, Part 2

chendunwu · 发表于 2009-8-7 15:18

What Is Smoke and Toxicity Testing?
The smoke density measurement taken from a material under fire conditions gives an
indication of the visibility through the smoke, this is important as reduced visibility makes it more difficult to escape from a fire hence increasing the threat to human life from the
toxic gases, flames and heat. Measuring the fumes produced from a material exposed to controlled fire conditions gives an indication of the fumes which may be produced in a real fire situation. This enables us to choose materials with lower levels of risk to human life.
A standard method of test for determining the smoke and toxicity of materials under fire conditions is IMO Resolution MSC 61(67): Annex 1, Part 2 which utilises the apparatus pictured above. This method gives the level of smoke and toxicity of the fumes produced from the material under test so that an assessment of its possible performance in a real fire situation can be made.

Test Method
Part 2 of the Fire Test Procedures Code is used to determine whether or not a product
will produce excessive quantities of smoke and toxic products or give rise to toxic hazards at elevated temperatures.
Specimens of the product are tested in an enclosed chamber and are positioned in a horizontal position beneath a cone heater.  Three specimens are tested under each of the following conditions:
Mode 1: Irradiance of 25 kW/m² in the presence of a pilot flame.
Mode 2: Irradiance of 25 kW/m² in the absence of a pilot flame. Mode 3: Irradiance of 50 kW/m² in the absence of a pilot flame.
The test is carried out for a period of 10 minutes, unless the smoke density is still increasing in which case the test will be continued for a further period of 10 minutes.
A photometric system (which consists of a white light beam and sensor) is used to determine the maximum specific optical density (S.O.D.) of the smoke.  The average result of three specimens tested under each test condition is calculated.

The sampling of fumes is made during the testing of the second or third specimen at each test condition, from the geometrical centre of the chamber within 3 minutes of the time when the maximum specific optical density is reached.  The concentration of each of the following toxic gases is recorded.

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Robin Chen  QQ:4451664 MSN:mvpdon1983@hotmail.com Tel:0755-23985457

[行业手册] IMO Resolution MSC 61(67): Annex 1, Part 2