1、ASTM D3894 B B m 0759530 0032743 B m AMERICAN SOCIETY FOR TESTING AND MATERIALS 1916 Race St.,Philadelphla,Pa.19103 Reprinted ffom the Annual Book of ASTM Standards,Copyright ASTM If nof listed in the current comblned Index.will appear in the next edition.4Tb Designation:D 3894-88 Standard Test Meth
2、od for Evaluation of Fire Response of Rigid Cellular Plastics Using a Srnail Corner Configuration7 This standard is shed under the fixed designation D 3894;the number immediately following the designation indicates the year of original adoption or,in the case of revision,the year of last revision.A
3、number in parentheses indicates theyear of last reapproval.A superscript epsilon(e)indicates an editorial change since the last revision or reapproval.-.1.Scope-1.1 This test method describes a small-scale laboratory procedure used to observe and measure the response of rigid cellular plastics,under
4、 specific exposed or protected condi-tions,to a standardized heat and flame exposure.Measure-ments of flame fravel,maximum temperature,and material damage are made and reported.Mechanical failures from.cracking,spalling,loss of adhesion,and other fire response factors useful in screening for protect
5、ive PUWQSS mafaiso be noted,.1.2 This test method has been found useful in screening rigid cellular plastics in exposed or projected conditions,using standard configurations(two adjacent walls;two adja-cent walls and ceiling)of similar materials in order to predict the performance of such materials
6、in a Factory Mutual Full-scale Comer Waii Test.1.3 This test method is intended for research knd develop-ment or for internal quality control purposes.It should be used to measure and describe the properties o f materials,products,or assemblies in response to heat and flame under controlled laborato
7、ry conditions and should not be used to describe or appraise the fire hazard or fire risk o f materials,.products,or assemblies under actual fire conditions:How-ever,results of this test may be used as elements of afire risk assessment which takes into account all o f the factors which are pertinent
8、 to an assessment o f the fire hazard of a particular end use.It is not intended as a basis for ratings used in material specifications or for building code purposes.NOTE 1:Warning-During the course of combustion,gases or va-pors,or both,are evolved that may be hazardous to personnel.Precaution-Adeq
9、uate precautions shall be taken to protect the opera-tors.1.4 The values stated in SI units are to be regarded as the standard.The values in parentheses are given for informa-tion only.1.5 This standard may involve hazardous materials,oper-ations,and equipment.This standard does not purport to addre
10、ss all of the safety problems associated with its use.It is the responsibility o f the user o f this standard to establish appropriate safety and health practices and determine the applicability o f regulatory limitations prior to use.Specific hazards statements are given in Notes 1 and 7.D 6 18 Met
11、hods of Conditioning Plastics and Electrical Insulating Materials for Testing2 D 3 195 Practice for Rotameter Calibration3 E 691 Practice for Conducting an Interlaboratory Test Program to Determine the Precision of Test Methods4 2 8 OSHA Standard:-General industry Safety and Health Standard Provisio
12、n 1910.1001 o-n Asbestos5 3.Summary of Test Method 3.1 The cellular plastic specimen,consisting of two sides(walls)assembled to form a corner or consisting of two sides.(walls)and a ceiling assembled to form a covered corner,is ignited with a gas burner.The flame spread,temperature rise,and damage a
13、re recorded.4.Significance and Use 4.1 A full-scale corner test is a widely recognized configu-ration for conducting large-scale fire test evaluations for demonstrating the flame spread potential and the material damage characteristics of insulated walls and ceilings.Such a test is described by the
14、Factory Mutual Corner Wail proce-dure and is recognized as a diversified test for evaluation of flame propagation by the Model Building Codes.4.2 A coriier provides a critical surface geometry for evaluating the fire response of material surfaces.It incorpo-rates three adjacent surfaces(two walls an
15、d ceiling)providing a combined heat flux that includes the conductive,convec-tive,and radiative responses of any specific burning material.4.3 Large-scale corner tests are expensive to conduct.A scaled-down screening test which exhibits good reproduc-ibility and good correlation is therefore useful
16、for predicting the results of full-scale corner testing.This test method has been judged to meet these criteria.Test assembly dimensions and testing times are convenient.Several tests can be conducted daily.Reproducibility,ease of performance,and economy of operation,as weil as a minimum correlation to the Factory Mutual Corner Wall Test of 75%,have been reported.6 This method is presently being used in industry and is the subject of further study by independent testing 2.Referenced Documents 2.