AS/NZS 4502.1:1997

1 - AS/NZS 4502.1:1997 METHODS FOR EVALUATING CLOTHING FOR PROTECTION AGAINST HEAT AND FIRE - EVALUATION OF THERMAL BEHAVIOUR...
4 - PREFACE
5 - 1 Scope
5 - 2 Normative reference
5 - 3 Definitions
5 - 3.1 change in appearance of the specimen:
5 - 3.2 heat transfer levels
5 - 3.3 heat transmission factor
5 - 3.4 specimen:
6 - 4 Principle
6 - 4.1 Method A
6 - 4.2 Method B
6 - 5 Apparatus
6 - 5.1 Radiation source,
7 - 5.2 Test frame
10 - 5.3 Specimen holder,
10 - 5.4 Calorimeter,
12 - 5.5 Temperature measuring and recording device,
12 - 6 Preparation of the test specimen
12 - 7 Test conditions
12 - 7.1 Conditioning atmosphere
12 - 7.2 Testing atmosphere
12 - 7.3 Heat flux density
12 - 8 Procedure
12 - 8.1 General
12 - 8.2 Calibration of the calorimeter
13 - 8.3 Calibration of the radiation source
14 - 8.4 Method A
14 - 8.5 Method B
15 - 9 Calculation for method B
15 - 9.1 Heat transmission factor
15 - 9.2 Heat transfer levels
16 - 10 Precision of method B
16 - 11 Test report

Sets out methods for determining the thermal behaviour of protective clothing or its constituents when exposed to a source of radiant heat. This Standard is identical with and reproduced from ISO 6942:1993.

This International Standard specifies two complementary methods (method A and method B) for the evaluation of the thermal behaviour of materials and material assemblies used in clothing for protection against heat and fire when exposed to a source of radiant heat.These tests are carried out on representative single or multi-layer textiles or other materials intended for clothing for protection against heat. They are also applicable to assemblies, which correspond to the overall build-up of a heat protective clothing assembly with or without underclothing.Method A is used for visual assessment of any changes in the material after the action of heat radiation. With method B, the protective effect of the materials is determined. The materials may be tested either by both methods or by only one of them.The tests according to these two methods serve to classify materials; however, to be able to make a statement or prediction as to the suitability of a material for protective clothing additional criteria must be taken into account.Since the tests are carried out at room temperature, the results do not necessarily correspond to the behaviour of the materials at higher ambient temperatures and therefore are only to a limited extent suitable for predicting the performance of the protective clothing made from the materials under test.

First published as AS/NZS 4502.1:1997.