| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
|---|---|---|---|---|---|---|---|
| 3<\/td>\n | Cellular plastics\ufffd\u2014 Determination of horizontal burning characteristics of small specimens subjec… <\/td>\n<\/tr>\n | ||||||
| 5<\/td>\n | Contents Page <\/td>\n<\/tr>\n | ||||||
| 6<\/td>\n | Foreword <\/td>\n<\/tr>\n | ||||||
| 7<\/td>\n | Cellular plastics\ufffd\u2014 Determination of horizontal burning characteristics of small specimens subjec… 1\ufffd\ufffd\ufffd Scope 1.1\ufffd\ufffd\ufffd This International Standard 1.2\ufffd\ufffd\ufffd This method of test is intended for quality assurance and limited product evaluation of ce… 1.3\ufffd\ufffd\ufffd The optional classification system described in annex\ufffd 1.4\ufffd\ufffd\ufffd The burning behaviour of cellular plastics is influenced by test specimen orientation (ver… 2\ufffd\ufffd\ufffd Normative references <\/td>\n<\/tr>\n | ||||||
| 8<\/td>\n | 3\ufffd\ufffd\ufffd Terms and definitions 4\ufffd\ufffd\ufffd Significance of test 4.1\ufffd\ufffd\ufffd Tests conducted on a material under the conditions specified can be of considerable value … 4.2\ufffd\ufffd\ufffd Assessment of fire hazard requires consideration of factors such as fuel contribution, int… 4.3\ufffd\ufffd\ufffd Horizontal burning characteristics, as measured by this test procedure, may be affected by… 4.4\ufffd\ufffd\ufffd Certain materials may shrink from the applied flame without igniting. In this event, the t… 4.5\ufffd\ufffd\ufffd The horizontal burning characteristics of some cellular plastic materials may change with … 5\ufffd\ufffd\ufffd Apparatus 5.1\ufffd\ufffd\ufffd Laboratory fume hood 5.2\ufffd\ufffd\ufffd P\/PF2 laboratory burner 5.3\ufffd\ufffd\ufffd Burner wing top <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | 5.4\ufffd\ufffd\ufffd Support gauze 5.5\ufffd\ufffd\ufffd Support-gauze holder 5.6\ufffd\ufffd\ufffd Two timing devices 5.7\ufffd\ufffd\ufffd Measuring scale 5.8\ufffd\ufffd\ufffd Gas supply 5.9\ufffd\ufffd\ufffd A manometer and gas flow meter 5.10\ufffd\ufffd\ufffd Cotton indicator 5.11\ufffd\ufffd\ufffd Desiccator 5.12\ufffd\ufffd\ufffd Conditioning room or chamber 5.13\ufffd\ufffd\ufffd Air-circulating oven 5.14\ufffd\ufffd\ufffd Dial-gauge micrometer <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | 6\ufffd\ufffd\ufffd Specimens 6.1\ufffd\ufffd\ufffd All specimens shall be cut from a representative sample of the material. Care shall be tak… 6.2\ufffd\ufffd\ufffd The standard test specimen shall be 6.3\ufffd\ufffd\ufffd Prepare a minimum of 20\ufffdspecimens for the test. This includes 10 additional specimens in t… 6.4\ufffd\ufffd\ufffd Mark each specimen across its width with lines at <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | 6.5\ufffd\ufffd\ufffd Test specimens with a high-density exterior (skin) on one side shall be tested with this s… 7\ufffd\ufffd\ufffd Conditioning 7.1\ufffd\ufffd\ufffd Specimens 7.1.1\ufffd\ufffd\ufffd The specimens shall not be conditioned until at least 7.1.2\ufffd\ufffd\ufffd Condition two sets of five specimens for at least 7.1.3\ufffd\ufffd\ufffd Condition two sets of five specimens for 7.1.4\ufffd\ufffd\ufffd All test specimens shall be tested in laboratory atmospheres of 7.2\ufffd\ufffd\ufffd Cotton 8\ufffd\ufffd\ufffd Test procedure 8.1\ufffd\ufffd\ufffd Adjustment of flame 8.1.1\ufffd\ufffd\ufffd Ensure that the fume hood fan is off. 8.1.2\ufffd\ufffd\ufffd Adjust the gas-flow rate and line pressure to the values shown in Table\ufffd <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | 8.2\ufffd\ufffd\ufffd Adjustment of specimen support <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | 8.3\ufffd\ufffd\ufffd Positioning of cotton indicator 8.4\ufffd\ufffd\ufffd Positioning of specimen 8.5\ufffd\ufffd\ufffd Burning procedure 8.5.1\ufffd\ufffd\ufffd Place the burner quickly in position under the upturned end of the specimen support and … 8.5.2\ufffd\ufffd\ufffd Immediately close the front panel of the fume hood, if not already closed, so that there… 8.5.3\ufffd\ufffd\ufffd After 8.5.4\ufffd\ufffd\ufffd Start the second timing device when the test specimen flame reaches the 8.5.5\ufffd\ufffd\ufffd Stop the first timing device when the flame or glowing combustion front reaches the 8.5.6\ufffd\ufffd\ufffd Stop the second timing device when the test specimen flame or glowing combustion front r… 8.5.7\ufffd\ufffd\ufffd Observe whether the cotton indicator was ignited by flaming drips. 8.5.8\ufffd\ufffd\ufffd Ignore drips falling into the burner unless a visible change occurs in the flame. In thi… 8.5.9\ufffd\ufffd\ufffd Switch on the fume-hood fan and, after exhausting all fumes, remove the test specimen an… 8.6\ufffd\ufffd\ufffd Measurements 8.6.1\ufffd\ufffd\ufffd Distance burnt ( 8.6.2\ufffd\ufffd\ufffd Burning time ( 8.6.3\ufffd\ufffd\ufffd Elapsed time ( <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | 8.7\ufffd\ufffd\ufffd Preparation for the next test 8.7.1\ufffd\ufffd\ufffd If reusing the support gauze, burn and clean off any residues remaining and allow it to … 8.7.2\ufffd\ufffd\ufffd Examine the burner and wing top for cleanliness and clean if necessary. 8.7.3\ufffd\ufffd\ufffd Check the flame (see 8.7.4\ufffd\ufffd\ufffd Switch off the fume-hood exhaust fan and repeat the procedure in 9\ufffd\ufffd\ufffd Calculations 9.1\ufffd\ufffd\ufffd If the flame or glowing combustion front passed the 9.2\ufffd\ufffd\ufffd If the flame or glowing combustion front did not pass the 9.3\ufffd\ufffd\ufffd Calculate and record the average of five specimens for each conditioning treatment. 10\ufffd\ufffd\ufffd Precision 10.1\ufffd\ufffd\ufffd Data 10.2\ufffd\ufffd\ufffd Repeatability 10.3\ufffd\ufffd\ufffd Reproducibility <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | 10.4\ufffd\ufffd\ufffd Averages 11\ufffd\ufffd\ufffd Test report <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | Classification system A.1\ufffd\ufffd\ufffd General A.2\ufffd\ufffd\ufffd Classification A.3\ufffd\ufffd\ufffd Materials of classes HF-1 and HF-2 <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | A.4\ufffd\ufffd\ufffd Materials of class HBF <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Cellular plastics. Determination of horizontal burning characteristics of small specimens subjected to a small flame<\/b><\/p>\n |