1、 ISO 2015 Fire tests Smoke-control door and shutter assemblies Part 1: Ambient- and medium-temperature leakage tests AMENDMENT 1 Essais au feu Assemblages porte et volet pare-fume Partie 1: Essais de fuite temprature ambiante et moyenne AMENDEMENT 1 INTERNATIONAL STANDARD ISO 5925-1 Second edition 2
2、007-09-15 Reference number ISO 5925-1:2007/Amd.1:2015(E) AMENDMENT 1 2015-02-01 ISO 5925-1:2007/Amd.1:2015(E)ii ISO 2015 All rights reserved COPYRIGHT PROTECTED DOCUMENT ISO 2015 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in a
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4、ale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ISO 5925-1:2007/Amd.1:2015(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bo
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11、s reserved iii Fire tests Smoke-control door and shutter assemblies Part 1: Ambient- and medium-temperature leakage tests AMENDMENT 1 Page 10, Annex B Add a new clause, B.3, as follows: B.3 Methods for measuring leakage rates Using the equipment described in B.2, one of the two following methods sha
12、ll be used for measuring leakage rates. B.3.1 Method A An inlet and an outlet pipe are connected to the chamber in Figure 1 on opposite ends of the chamber (in the left wall and right wall of the chamber at mid-height). The outlet pipe shall be fitted with a valve to control chamber pressure. The ai
13、r flow rate shall be measured in each pipe using apparatus suitable for this purpose. For example, use a hot wire anemometer traversed across the pipe inside diameter to determine the average air speed (V avg ) in the pipe and a thermometer to measure air temperature for calculations to standard con
14、ditions). The airflow rate Q is expressed as V avg(m/hr) area of pipe (m 2 ) = Q (m 3 /hr) in each pipe. The air-speed measurement shall be made at least nine pipe diameters from the air flow source and a minimum of five pipe diameters from the chamber wall. The pipe diameter shall be sized to allow
15、 for accurate traverse averaging of the air speed instrument (at least 75 mm). The total leakage rate is Q t= Q in(sealed) Q out(sealed). Before or after the test, the chamber leakage rate shall be determined by hermetically sealing the chamber opening (EPDM rubber sheet roofing mounted in a frame,
16、then installed and sealed with silicone caulk is a suitable hermetic seal) where the door and framing is normally installed, and measuring Q a= Q in Q out . The specimen leakage rate is then calculated as Q d= Q t Q a . Method A will require more robust heating since the inlet air is escaping from t
17、he outlet pipe. Additionally, the air from the outlet is significantly hotter than the inlet air and care must be taken to account for calculating the flow rates corrected for temperature to standard conditions. Method B avoids these issues. B.3.2 Method B A single inlet pipe is installed on one wal
18、l of the chamber. Air flow rate shall be measured in the pipe using a suitable apparatus. For example, use a hot wire anemometer traversed across the pipe inside diameter to determine the average air speed (V avg ) in the pipe and a thermometer to measure air temperature for calculations to standard
19、 conditions. The airflow rate Q is expressed as V avg(m/hr) area of pipe (m 2 ) = Q (m 3 /hr) in the pipe. The air speed measurement shall be made at least nine pipe diameters from the air flow source and a minimum of five pipe diameters from the chamber wall. The pipe diameter shall be sized to all
20、ow accurate traverse averaging of the air speed instrument (at least 75 mm). The air flow source shall have either a control valve or a bleed T to control air pressure to the chamber. The total leakage rate Q t= Q in . Before or after the test, the chamber leakage rate shall be determined by hermeti
21、cally sealing the chamber opening (EPDM rubber sheet roofing mounted in a frame, then installed and sealed ISO 5925-1:2007/Amd.1:2015(E) ISO 2015 All rights reserved 1 ISO 5925-1:2007/Amd.1:2015(E) with silicone caulk is a suitable hermetic seal) where the door and framing is normally installed, and
22、 measuring Q a= Q in(sealed). The specimen leakage rate is then calculated as Q d= Q t Q a . The inlet control valve method of controlling pressure has one problematic issue. If the air source is of higher pressure than the test pressure, one shall eventually close the valve to avoid over-pressurizi
23、ng the chamber then open slightly while the specimen leaks and continue this process throughout the test. This does not happen with specimens that exhibit a high leakage rate or a leaky chamber. The preferred method is to leak excess pressure at the inlet where the air source connects to the inlet p
24、ipe using a T connection. The turbulence produced at the T does not affect the flow rate measurement nine pipe diameters downstream. Additionally, an air source consisting of a variac connected to an air conditioning blower allows one to control flow rate very precisely instead of using a simple valve on the T bleed leg. One shall experiment with T bleed leg pipe diameters to obtain optimal precise control of test pressures.2 ISO 2015 All rights reserved ISO 5925-1:2007/Amd.1:2015(E) ISO 2015 All rights reserved ICS 13.220.50; 13.220.20; 91.060.50 Price based on 2 pages
