BS ISO 9772:2001:2004 Edition
$102.76
Cellular plastics. Determination of horizontal burning characteristics of small specimens subjected to a small flame
| Published By | Publication Date | Number of Pages |
| BSI | 2004 | 22 |
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 3 | Cellular plastics�— Determination of horizontal burning characteristics of small specimens subjec… |
| 5 | Contents Page |
| 6 | Foreword |
| 7 | Cellular plastics�— Determination of horizontal burning characteristics of small specimens subjec… 1��� Scope 1.1��� This International Standard 1.2��� This method of test is intended for quality assurance and limited product evaluation of ce… 1.3��� The optional classification system described in annex� 1.4��� The burning behaviour of cellular plastics is influenced by test specimen orientation (ver… 2��� Normative references |
| 8 | 3��� Terms and definitions 4��� Significance of test 4.1��� Tests conducted on a material under the conditions specified can be of considerable value … 4.2��� Assessment of fire hazard requires consideration of factors such as fuel contribution, int… 4.3��� Horizontal burning characteristics, as measured by this test procedure, may be affected by… 4.4��� Certain materials may shrink from the applied flame without igniting. In this event, the t… 4.5��� The horizontal burning characteristics of some cellular plastic materials may change with … 5��� Apparatus 5.1��� Laboratory fume hood 5.2��� P/PF2 laboratory burner 5.3��� Burner wing top |
| 9 | 5.4��� Support gauze 5.5��� Support-gauze holder 5.6��� Two timing devices 5.7��� Measuring scale 5.8��� Gas supply 5.9��� A manometer and gas flow meter 5.10��� Cotton indicator 5.11��� Desiccator 5.12��� Conditioning room or chamber 5.13��� Air-circulating oven 5.14��� Dial-gauge micrometer |
| 13 | 6��� Specimens 6.1��� All specimens shall be cut from a representative sample of the material. Care shall be tak… 6.2��� The standard test specimen shall be 6.3��� Prepare a minimum of 20�specimens for the test. This includes 10 additional specimens in t… 6.4��� Mark each specimen across its width with lines at |
| 15 | 6.5��� Test specimens with a high-density exterior (skin) on one side shall be tested with this s… 7��� Conditioning 7.1��� Specimens 7.1.1��� The specimens shall not be conditioned until at least 7.1.2��� Condition two sets of five specimens for at least 7.1.3��� Condition two sets of five specimens for 7.1.4��� All test specimens shall be tested in laboratory atmospheres of 7.2��� Cotton 8��� Test procedure 8.1��� Adjustment of flame 8.1.1��� Ensure that the fume hood fan is off. 8.1.2��� Adjust the gas-flow rate and line pressure to the values shown in Table� |
| 16 | 8.2��� Adjustment of specimen support |
| 17 | 8.3��� Positioning of cotton indicator 8.4��� Positioning of specimen 8.5��� Burning procedure 8.5.1��� Place the burner quickly in position under the upturned end of the specimen support and … 8.5.2��� Immediately close the front panel of the fume hood, if not already closed, so that there… 8.5.3��� After 8.5.4��� Start the second timing device when the test specimen flame reaches the 8.5.5��� Stop the first timing device when the flame or glowing combustion front reaches the 8.5.6��� Stop the second timing device when the test specimen flame or glowing combustion front r… 8.5.7��� Observe whether the cotton indicator was ignited by flaming drips. 8.5.8��� Ignore drips falling into the burner unless a visible change occurs in the flame. In thi… 8.5.9��� Switch on the fume-hood fan and, after exhausting all fumes, remove the test specimen an… 8.6��� Measurements 8.6.1��� Distance burnt ( 8.6.2��� Burning time ( 8.6.3��� Elapsed time ( |
| 18 | 8.7��� Preparation for the next test 8.7.1��� If reusing the support gauze, burn and clean off any residues remaining and allow it to … 8.7.2��� Examine the burner and wing top for cleanliness and clean if necessary. 8.7.3��� Check the flame (see 8.7.4��� Switch off the fume-hood exhaust fan and repeat the procedure in 9��� Calculations 9.1��� If the flame or glowing combustion front passed the 9.2��� If the flame or glowing combustion front did not pass the 9.3��� Calculate and record the average of five specimens for each conditioning treatment. 10��� Precision 10.1��� Data 10.2��� Repeatability 10.3��� Reproducibility |
| 19 | 10.4��� Averages 11��� Test report |
| 20 | Classification system A.1��� General A.2��� Classification A.3��� Materials of classes HF-1 and HF-2 |
| 21 | A.4��� Materials of class HBF |
