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IMO A47

TESTING OF VERTICALLY SUPPORTED TEXTILES AND FILMS ACCORDING TO IMO RES. A.471(XII) AND NT FIRE 015

This resolution describes a method for assessment of resistance to propagation of flames, as specified in the SOLAS convention. Ignition source applied is a small flame. The test is also described in NORDTEST method NT FIRE 015.

TEST PRINCIPLE

The test specimen is mounted vertically in a test rig, and exposed by a small flame at the lower part of the specimen. Development of fire in the test object is observed. Five parallel tests are performed in both weft and warp directions.

Textiles treated with flame retarding chemicals shall be tested in both washed an unwashed condition.


TESTING

Testing can be performed when an order in writing is received, and the test material is conditioned according to the method. Normally, it will last 3-4 weeks from we have received the test material until the test report is finished.
TEST MATERIAL

Specimen dimensions are 220 mm x 170 mm. For a complete test, at least 20 specimens in the warp direction, and 20 specimens in the weft dimensions must be available.


TEST REPORT

The test report contains information about
  • the product
  • the product name
  • manufacturer and place of production
  • Afterflame, dimension of damage and development of burning droplets for any of the tested objects.

PROPOSED CRITERIA FOR CURTAINS AND DRAPES

The following criteria for classification of materials are recommended in IMO Res. A.471(XII), and amended by IMO Res. a.563(14), as a guidance. Where a different application of the test method is desired, other criteria may be applicable.

1.Following application of the flame test the experimental data from ten or more specimens should be examined. Products which show any of the following characteristics should be considered as unsuitable for use as curtains, draperies, or free-hanging fabric product for use in rooms containing furniture and furnishings of restricted fire risk as defined in Regulation II-2/3.23.6 of the SOLAS amendments.
.1An afterflame time greater than five seconds for any of the ten or more specimens tested with surface application of the pilot flame. But see 2 below
.2Burn through to any edge of any of the ten or more specimens tested with surface application of the pilot flame. But see 2 below.
.3Ignition of cotton wool below the specimen in any of the ten or more specimens tested. But see 2 below
.4An average char length in excess of 150 mm observed in any of the batches of five specimens tested by either surface or edge ignition
.5The occurrence of a surface flash propagating more than 100 mm from the point of ignition with or without charring of the base fabric. But see 2 below.
  
2.If, following analysis of the experimental data from tests of a fabric, it is found that either or both of the batches of five specimens cut in both warp and weft directions fail to meet one ore more of the criteria specified in .1, .2, .3 and .5 above because of poor performance of only one of the five specimens tested, one complete retest of a similar batch is permitted. Failure of the second batch to meet any of the criteria should provide the basis for rejection of the fabric for use.