Part 2 - Smoke and Toxicity Test

 Smoke generation tests shall be conducted in accordance with standard ISO 5659:1994, Part 2 and additional test procedures as described in this part of the Code. To carry out the tests in accordance with this standard, modifications of the arrangements and procedures to the ISO standard shall be made, if necessary.

 Preparation of test specimen shall be in accordance with the practice outlined in resolutions A.653(16), A.687(17) and A.753(18). In the case of cables, only specimens of those with maximum insulation thickness need be tested.

 Irradiance to the specimen during the test shall be kept constant. Three specimens shall be tested under each of the following conditions:

• .1 irradiance of 25 kW/m² in the presence of pilot flame;

• .2 irradiance of 25 kW/m² in the absence of pilot flame; and

• .3 irradiance of 50 kW/m² in the absence of pilot flame.

 The test shall be carried out for at least 10 min. If the minimum light transmittance value has not been reached during the 10-minute exposure, the test shall be continued for a further 10-minute period.

  2.5.1 Specific optical density of smoke (Ds) as defined below shall be recorded during the test period at least every 5 s:

  2.5.2 When making toxicity measurements, the sampling of fumes shall be made during the testing of the second or the third specimen at each test condition, from the geometrical centre of the chamber within 3 min of the time when the maximum specific optical density of smoke is reached. The concentration of each toxic gas shall be determined as ppm in the chamber volume.

  2.6.1 Smoke

An average (Dm) of the maximum of Ds of three tests at each test condition shall be calculated.

• .1 for materials used as surface of bulkheads, linings or ceilings, the Dm shall not exceed 200 in any test condition;

• .2 for materials used as primary deck covering, the Dm shall not exceed 400 in any test condition;

• .3 for materials used as floor covering, the Dm shall not exceed 500 in any test condition; and

• .4 for plastic pipes and electric cables, the Dm shall not exceed 400 in any test condition.

  2.6.2 Toxicity

The gas concentration measured at each test condition shall not exceed the following limits:

 A test report shall contain the following information:

• .1 type of the material, i.e. surface finish, floor covering, primary deck covering, pipes, etc;

• .2 trade name of the material;

• .3 description of the material;

• .4 construction of the specimen;

• .5 name and address of the manufacturer of the material;

• .6 Dm at each heating and ignition condition;

• .7 concentrations of toxic gases in ppm, if applicable;

• .8 judgement according to paragraph 2.6,

• .9 name and address of the testing laboratory; and

• .10 date of testing