ASTM_D_1433_-_77_scan.pdf

ff-5-6.5 ASTM DI433 77 M 2575532 24370 O m.(cib&-a ANSIIASTM D 1433-77 AMERtCAN SOCIETY FOR TESTING AND MATERIALS 1916 Raco St.,Philadelphla,Pa.,19103 Reprinted from the Annual Book of ASTM Standards,Copyright ASTM if not listed in the current combined index,will appear in the next edition.Standard Test Method for.RATE OF BURNING AND/OR EXTENT AND TIME OF BURNING OF FLEXIBLE THIN I NCLI N El PLASTIC SHEETING SUPPORTED ON A 45-DEG This Standard is issued under the fixed designation D 1433;the number immediately following tLe designation indicates the year of original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.1.Scope D 618.Conditioning Plastics and Electrical 1.1 This method covers the determination of the relative rate of burning and/or extent and 3.Significance time of burning of flexible plastics in the form of film or thin sheeting.Materials that shrink intended to be a criterion for fire hazard.The fire hazard excessively upon ignition,or that melt to created by materials depends upon the form cause the flame to be carried away while drip-and end use of the material.Assessment of fire ping,cannot be evaluated by this method.Al-hazard includes,but is not limited to,many though the test is primarily intended for non-factors,such as,ease of ignition,burning rate,rigid plastic films,it may be used on rigid or nonrigid sheeting which can be bent through flame spread,fuel contribution,intensity of the 45-deg angle specified in the test procedure.burning,and products of combustion.3.2 This method is intended to provide data 1.2 Caution-During the course of com-for comparing the relative burning rates of thin bustion,gases or vapors,or both,are evolved plastic sheeting under the conditions of this test.which may be hazardous to personnel.Ade-The rate of burning will vary with thickness.quate precautions should be taken to protect Test data should be compared with data for a the operator.control material of known performance and of NOTE I-Method D 568,Test for Rate of Burn-comparable thickness.Correlation with burn-ing and/or Extent and Time of Burning of Flexible ing characteristics under actual use conditions Plastics in a Vertical Position*may also be used to test flexible thin sheets or fdms.Self-supporting is not necessarily implied.plastics are tested by Method D635,Test for Rate 3.3 Even though the test reproducibility Self-supporting Plastics in a Horizontal Position.Ure and describe the properties of materials,products,or systems in response to heat and flame under controlled laboratory conditions appraisal of the fire hazard of materials,prod-ucts,or systems under actual fire condition.NOTE 2-The values stated in SI units are to be regarded as the standard.2.Applicable Documents 2,l ASTM Standards:Insulating Materials for Testing 3.1 This method is.-of Burning and/or Extent and Thle f Burning of within a laboratory will generally be within 5 to 1.3 This standard should be used to meas-This method is under the jurisdiction of ASTM Commit-tee D-20 on Plastics and is the direct responsibility of Subcommittee D-20.30 on Thermal Properties.There are differences between CS 192-53 and Method Current edition approved July 1,1977.Published September 1977.Originally published as D 1433-56 T.Last Previous edition 1433-76*Annual Book of ASTM Standards,Part 35.This caveat has been placed in the standard in ac-cordance with a policy established by the ASTM Board of Directors in September 1973.The caveat will remain in this standard until Committee E-39 on Fire Hazard Stand-ards has approved it as a fire hazard standard.Whippany,N.J.07981.and should not be used for the description or D 14333 although the apparatus is identica1*L Available through Custom Scientific Instruments,Inc.,NOTICE:This standard has either been superseded and replaced by a new version or discontinued.Contact ASTM International(www.astm.org)for the latest information.-._.,.i.,.ASTM DL433 77 2575532 0024373 2 m D 1433 t IO%,the reproducibility between various labo-ratories has been found to vary by as much as 40 to 50%.This must be recognized when making interlaboratory comparisons of data.The test is therefore not suitable as a precise general specification test.However,it is suita-ble for control testing or for making relative evaluations within a laboratory.4.Apparatus 4.1 The assembled apparatus shall be essen-tially as shown in Fig.1 and shall include the following:4.I.1 Specimen Holder-A removable,flat specimen-holding rack,consisting of an upper and lower section constructed and hinged as shown in Fig.2.The specimen holder shall be constructed in such a manner as to support the specimen by tight closure of the upper and lower sections around the sides of the speci-mens.The sections shall be held together at the bottom with two spring paper clips.The center of the holder contains an open U-shaped area in which the burning of the specimen occurs.At the open end