Publisher’s version / Version de l'éditeur:
Technical Note (National Research Council of Canada. Division of Building Research), 1973-05-01
READ THESE TERMS AND CONDITIONS CAREFULLY BEFORE USING THIS WEBSITE.
https://nrc-publications.canada.ca/eng/copyright
Vous avez des questions? Nous pouvons vous aider. Pour communiquer directement avec un auteur, consultez la première page de la revue dans laquelle son article a été publié afin de trouver ses coordonnées. Si vous n’arrivez pas à les repérer, communiquez avec nous à PublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca.
Questions? Contact the NRC Publications Archive team at
PublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. If you wish to email the authors directly, please see the first page of the publication for their contact information.
NRC Publications Archive
Archives des publications du CNRC
For the publisher’s version, please access the DOI link below./ Pour consulter la version de l’éditeur, utilisez le lien DOI ci-dessous.
https://doi.org/10.4224/20338374
Access and use of this website and the material on it are subject to the Terms and Conditions set forth at
A fire test on a wall section penetrated by a 4-in. cast-iron DWV pipe
McGuire, J. H.; Huot, P.
https://publications-cnrc.canada.ca/fra/droits
L’accès à ce site Web et l’utilisation de son contenu sont assujettis aux conditions présentées dans le site LISEZ CES CONDITIONS ATTENTIVEMENT AVANT D’UTILISER CE SITE WEB.
NRC Publications Record / Notice d'Archives des publications de CNRC: https://nrc-publications.canada.ca/eng/view/object/?id=f413e6b1-ca2f-4419-b03a-b4f6292f99ec https://publications-cnrc.canada.ca/fra/voir/objet/?id=f413e6b1-ca2f-4419-b03a-b4f6292f99ec
.'
·li
NATIONAL RESEARCH COUNCIL OF CANADA
DIVISION OF BUILDING RESEARCH
No.
571
PREPARED BY J. H. McGuire and P. Huot
CHECKED BY G. W. S. APPROVED BY A.G.W.
ｾ May 1973 PREPARED FOR Information and record
SUBJECT A FIRE TEST ON A WALL SECTION PENETRATED BY A 4-1N.
CAST -IRON DWV PIPE
In considering a draft CSA standard concerning walls and parti-tions penetrated by plastic pipe, members of the relevant CSA committee have questioned one of the failure criteria which reads, "If at any time the temperature of any portion of the pipe or associated sleeve outside the furnace attains lOOO°F (538°C) the assembly shall be deemed to have failed." A failure criterion given in ASTM Ell9 is that no temperature
on the unexposed surface of a wall or partition shall rise by more than 325°F and it has been suggested that a criterion related to this tempera-ture would be more appropriate.
It has also been suggested that such criteria can only be assessed
in the light of the results of tests conducted on wall specimens penetrated by conventional metal pipe. To provide one such result, a test, the
subject of this note, was carried out. Te st Conditions
The te st furnace was the one developed for the main body of the pipe penetration study reported elsewhere.(1,2) The dimensions of
interest, in the present context, are illustrated in Figure 1. The test wall specimens were again those used previously, 4-in. refractory castable, of density 57 lb/ cu ft. The opening through which the pipe specimen passed was 5 in. in diameter and was packed with a soft
-2-asbestos material. The test pipe was a conventional O. 22-in. (nominal 0.25 in.) thick 4-in. diameter DWV pipe tested as delivered with a coating, inside and out, of thin bituminous protection. A 10 -ft length was used and the ends were closed and supported.
A feature of the furnace that is often of considerable signifi-cance is that it can operate at positive pressure. Under the prevailing conditions, the sign of the pressure difference was not likely to have a noticeable influence on the temperature profile produced in the pipe and pressure recordings were not taken. It can be said, however, that the test 'chamber was at all times maintained at a positive pressure of the order of O. 1 in. W. G.
The temperature in the test charnber was regulated to follow the ASTh1 E -119 time -temperature curve excepting that during the first 20 minutes of test temperatures were a little low. During this period the heat sink of the large mass of pipe within the furnace
proved to be excessive in comparison with the heat input capability of the furnace.
Temperature measurements were made with a 24-point, 4-second recorder from 20-gauge thermocouples, beneath small asbestos pads, On the top surfaces of both ends of the pipe, both at the unexposed surface of the wall specimen and 2, 4, 6, 9, 12, 15, 18, 24 and 34 ia. from it.
Temperature profiles, at various times, along the top surface of one of the two exposed portions of the pipe are shown in Figure 2. The corresponding temperature profiles relating to the opposite end of the pipe agreed to within a few degrees with those of Figure 2.
With regard to the criterion specified in the Introduction it will be seen that the unexposed pipe surface temperatures were at all times below 1000°F, except within 1/4 in. of the wall during the final few minutes of the 2-hour exposure. The criterion of 325°F rise was
exceeded out to a distance along the pipe of 3.5 in. after 30 minute s of test, 7 in. after an hour, and 8.5 in. after 2 hours.
References
(1) McGuire, J. H. Penetration of Fire Partitions by Plastic DWV Pipe. Fire Tech., V. 19, No.1, Feb. 1973. p. 5 -14.
(2) McGuire) J. H. and Huot, P. Fire Te sts Concerning the PenetratioI1 of Walls by Horizontal Plastic DWV Pipes, National Research Council of Canada, Division of Building Research, DBR Tech Note 557,
AIR INTAKE FROM OUTER CHAMBER SOFT ASBESTOS PACKING" FIRE BRICKS TE ST WA LL 1 0 I P LA S TIC PIP E (TEST SPECIMEN) 36"
