1、NFPA252 Standard Methods of Fire Tests of Door Assemblies 2012 Edition NFPA, 1 Batterymarch Park, Quincy, MA 02169-7471 An International Codes and Standards Organization Become a MemberSubscribeto theRegister forSeminars, Webinars, and Online CoursesVisit theNFPA CatalogNOTICE AND DISCLAIMER OF LIAB
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25、al Fire Protection Association. All Rights Reserved.NFPA252Standard Methods ofFire Tests of Door Assemblies2012 EditionThis edition of NFPA 252, Standard Methods of Fire Tests of Door Assemblies, was prepared bythe Technical Committee on Fire Tests. It was issued by the Standards Council on December
26、13, 2011, with an effective date of January 2, 2012, and supersedes all previous editions.This edition of NFPA 252 was approved as an American National Standard on January 2, 2012.Origin and Development of NFPA 252The American Society of Testing and Materials (ASTM) adopted Standard Methods of FireT
27、ests ofDoor Assemblies as a tentative standard in 1940 and as a formal standard in 1941. In 1942, thestandard was adopted by the NFPA and approved by the American Standards Association. It wasreconfirmed and adopted in 1950 by the Committee on Fire Tests of Building Construction andMaterials. In 195
28、3, a new NFPA Committee on Fire Tests was formed by action of the Board ofDirectors, and recommendations for revision of the standard made by that committee wereadopted in 1958, 1969, 1972, 1976, 1979, 1984, and 1990.The basic procedure covered by this standard was developed by Underwriters Laborato
29、riesInc. and has not undergone any significant revisions to the original concept. The 1995 editionintroduced a new provision addressing the neutral plane of the furnace. That provision per-mits the testing agency to establish the neutral plane of the test furnace to the specification ofthe particula
30、r need, by conducting the test under either positive pressure or atmosphericpressure.The 1999 edition of NFPA 252 contained further editorial refinements to harmonize theprocedures and terminology with those found in NFPA 251, Standard Methods of Tests of FireResistance of Building Construction and
31、Materials; NFPA 257, Standard on Fire Test for Window andGlass Block Assemblies; and NFPA 80, Standard for Fire Doors and Fire Windows. The 1999 editionalso provided greater clarification for the hose stream application and procedure and theapplication and reporting of positive pressure testing for
32、door assemblies.For the 2003 edition, the chapter layout of NFPA 252 was reorganized to meet the Manualof Style for NFPATechnical Committee Documents, with minor editorial revisions.Revisions for the 2008 edition included tighter tolerances for furnace control and thereplacement of the detailed hose
33、 stream test procedures with a reference to ASTM E 2226,Standard Practice forApplication of Hose Stream.The 2012 edition includes revisions to the requirements for furnace pressure and tem-peratures.2521NFPA and National Fire Protection Association are registered trademarks of the National Fire Prot
34、ection Association, Quincy, Massachusetts 02169.Technical Committee on Fire TestsWilliam E. Fitch, ChairPhyrefish Enterprises, Inc., FL SEFarid Alfawakhiri, American Iron and Steel Institute,IL MBarry L. Badders, Jr., Southwest Research Institute,TX RTJesse J. Beitel, Hughes Associates, Inc., MD SER
35、obert G. Bill, Jr., FM Global, MA IGordon H. Damant, Inter-City Testing or 1800C/min(3240F/min)8.1.4 The results of the hose stream test shall be docu-mented.Annex A Explanatory MaterialAnnex A is not a part of the requirements of this NFPA documentbut is included for informational purposes only. Th
36、is annex containsexplanatory material, numbered to correspond with the applicable textparagraphs.A.4.1.1 See Table A.4.1.1 for times and temperatures thatcomprise the standard temperature-time curve for control offire tests.Table A.4.1.1 Standard Temperature-Time Curve for Control of Fire TestsTime(
37、hr:min)Temperature(C)Area Above 20C BaseTemperature(F)Area Above 68F BaseC-min C-hr F-min F-hr0:00 20 0 0 68 0 00:05 538 1,290 22 1,000 2,330 390:10 704 4,300 72 1,300 7,740 1290:15 760 7,860 131 1,399 14,150 2360:20 795 11,650 194 1,462 20,970 3500:25 821 15,590 260 1,510 28,050 4680:30 843 19,650
38、328 1,550 35,360 5890:35 862 23,810 397 1,584 42,860 7140:40 878 28,060 468 1,613 50,510 8420:45 892 32,390 540 1,638 58,300 9710:50 905 36,780 613 1,661 66,200 1,1030:55 916 41,230 687 1,681 74,220 1,2371:00 927 45,740 762 1,700 82,330 1,3721:05 937 50,300 838 1,718 90,540 1,5091:10 946 54,910 915
39、1,735 98,830 1,6471:15 955 59,560 993 1,750 107,200 1,7871:20 963 64,250 1,071 1,765 115,650 1,9281:25 971 68,990 1,150 1,779 124,180 2,0701:30 978 73,760 1,229 1,792 132,760 2,2131:35 985 78,560 1,309 1,804 141,420 2,3571:40 991 83,400 1,390 1,815 150,120 2,5021:45 996 88,280 1,471 1,826 158,890 2,
40、6481:50 1,001 93,170 1,553 1,835 167,700 2,7951:55 1,006 98,080 1,635 1,843 176,550 2,9422:00 1,010 103,020 1,717 1,850 185,440 3,09125210 FIRE TESTS OF DOOR ASSEMBLIES2012 EditionTable A.4.1.1 ContinuedTime(hr:min)Temperature(C)Area Above 20C BaseTemperature(F)Area Above 68F BaseC-min C-hr F-min F-
41、hr2:10 1,017 112,960 1,882 1,862 203,330 3,3892:20 1,024 122,960 2,049 1,875 221,330 3,6892:30 1,031 133,040 2,217 1,888 239,470 3,9912:40 1,038 143,180 2,386 1,900 257,720 4,2952:50 1,045 153,390 2,556 1,912 276,110 4,6023:00 1,052 163,670 2,728 1,925 294,610 4,9103:10 1,059 174,030 2,900 1,938 313
42、,250 5,2213:20 1,066 184,450 3,074 1,950 332,000 5,5333:30 1,072 194,940 3,249 1,962 350,890 5,8483:40 1,079 205,500 3,425 1,975 369,890 6,1653:50 1,086 216,130 3,602 1,988 389,030 6,4844:00 1,093 226,820 3,780 2,000 408,280 6,8054:10 1,100 237,590 3,960 2,012 427,670 7,1284:20 1,107 248,430 4,140 2
43、,025 447,180 7,4534:30 1,114 259,340 4,322 2,038 466,810 7,7804:40 1,121 270,310 4,505 2,050 486,560 8,1104:50 1,128 281,360 4,689 2,062 506,450 8,4415:00 1,135 292,470 4,874 2,075 526,450 8,7745:10 1,142 303,660 5,061 2,088 546,580 9,1105:20 1,149 314,910 5,248 2,100 566,840 9,4475:30 1,156 326,240
44、 5,437 2,112 587,220 9,7875:40 1,163 337,630 5,627 2,125 607,730 10,1295:50 1,170 349,090 5,818 2,138 628,360 10,4736:00 1,177 360,620 6,010 2,150 649,120 10,8196:10 1,184 372,230 6,204 2,162 670,000 11,1676:20 1,191 383,900 6,398 2,175 691,010 11,5176:30 1,198 395,640 6,594 2,188 712,140 11,8696:40
45、 1,204 407,450 6,791 2,200 733,400 12,2236:50 1,211 419,330 6,989 2,212 754,780 12,5807:00 1,218 431,270 7,188 2,225 776,290 12,9387:10 1,225 443,290 7,388 2,238 797,920 13,2997:20 1,232 455,380 7,590 2,250 819,680 13,6617:30 1,239 467,540 7,792 2,262 841,560 14,0267:40 1,246 479,760 7,996 2,275 863
46、,570 14,3937:50 1,253 492,060 8,201 2,288 885,700 14,7628:00 1,260 504,420 8,407 2,300 907,960 15,133A.6.2.1 Additional information on the hose stream applica-tion can be found in Section B.13.A.6.2.2 The elimination of the hose stream test for some20-minute-rated assemblies is based on their field
47、applica-tion.A.6.2.6 In Table 6.2.4, the exposed area is permitted to becalculated using the outside dimensions of the test specimen,including a frame, hangers, tracks, or other parts of the assem-bly, if provided, but normally not including the wall into whichthe specimen is mounted. Where multiple
48、 test specimens aremounted in the same wall, the rectangular or square wall area encompassing all of the specimens is considered the ex-posed area, since the hose stream has to traverse this areaduring its application.Annex B CommentaryThis annex is not a part of the requirements of this NFPAdocumen
49、tbut is included for informational purposes only.B.1 Introduction. This commentary has been prepared toprovide the user of NFPA 252 with background informationon the development of the standard and its application in the25211ANNEX B2012 Editionfire protection of buildings. It also provides guidance in theplanning and performance of fire tests and in the reporting ofresults. No attempt has been made to incorporate all of theavailable information on fire testing in this commentary. Theserious s
