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1、BRITISH STANDARD BS EN ISO 12572:2001 Hygrothermal performance of building materials and products Determination of water vapour transmission properties The European Standard EN ISO 12572:2001 has the status of a British Standard ICS 91.100.01 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY
2、COPYRIGHT LAW Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 03:11:28 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 12572:2001 This British Standard, having been prepared under the direction of the Sector Committee for Building and Civil Engineering, was published under the authority
3、of the Standards Committee and comes into effect on 15 August 2001 BSI 07-2001 ISBN 0 580 36305 8 National foreword This British Standard is the official English language version of EN ISO 12572:2001. The UK participation in its preparation was entrusted by Technical Committee B/540, Energy performa
4、nce of materials, components and buildings, to Subcommittee B/540/1, European standards for thermal insulation which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references Attention is drawn to the fact that CEN
5、and CENLEC Standards normally include an annex which lists normative references to international publications with their corresponding European publications. The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Ca
6、talogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for thei
7、r correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; m
8、onitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN ISO title page, pages 2 to 32, an inside back cover and a back cover. The BSI copyright date displayed in this document indicate
9、s when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 03:11:28 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 12572 June 2001 ICS 91.120.10 English ver
10、sion Hygrothermal performance of building materials and products - Determination of water vapour transmission properties (ISO 12572:2001) Performance hygrothermique des matriaux et produits pour le btiment - Dtermination des proprits de transmission de la vapeur deau (ISO 12572:2001) Wrme- und feuch
11、tetechnisches Verhalten von Baustoffen und Bauprodukten - Bestimmung der Wasserdampfdurchlssigkeit (ISO 12572:2001) This European Standard was approved by CEN on 18 October 2000. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
12、European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Management Centre or to any CEN member. This European Standard exists in three official versions (Engli
13、sh, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republi
14、c, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36
15、 B-1050 Brussels 2001 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 12572:2001 E Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 03:11:28 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 2 EN ISO 12572:2001 Contents Page
16、 Foreword3 1 Scope4 2 Normative references4 3 Definitions, symbols and units5 4 Principle7 5 Apparatus7 6 Test specimens8 7 Procedure10 8 Calculation and expression of results13 9 Accuracy of measurement15 10 Test report17 Annex A (normative) Methods suitable for self supporting materials19 Annex B
17、(normative) Methods suitable for loose fills21 Annex C (normative) Methods suitable for membranes and foils23 Annex D (normative) Methods suitable for mastics and sealants24 Annex E (normative) Methods suitable for paint, varnishes, etc.26 Annex F (normative) Correction for the effect of a masked ed
18、ge of a specimen27 Annex G (normative) Correction for resistance of air layers28 Annex H (informative) Weighing repeatability, weighing interval and specimen size needed to achieve desired accuracy29 Annex J (informative) Conversion table for water vapour transmission units30 ANNEX ZA (normative) No
19、rmative references to international publications with their relevant European publications31 ANNEX ZB (informative) Informative references to international publications with their relevant European publications31 Bibliography32 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 03:11:28 GMT+00:0
20、0 2006, Uncontrolled Copy, (c) BSI Page 3 EN ISO 12572:2001 Foreword The text of EN ISO 12572:2001 has been prepared by Technical Committee CEN/TC 89 “Thermal performance of buildings and building components“, the secretariat of which is held by SIS, in collaboration with Technical Committee ISO/TC
21、163 “Thermal insulation“. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by December 2001, and conflicting national standards shall be withdrawn at the latest by December 2001. This standard is one
22、of a series of standards which specify test methods for the thermal and moisture related properties of building materials and products. The European publications to be used instead of the International Standards listed in clause 2 are given in normative annex ZA, which is an integral part of this Eu
23、ropean Standard. The annexes A, B, C, D, E, F, G and ZA are normative. The annexes H, J and ZB are informative. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Re
24、public, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 03:11:28 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 4 EN ISO 12572:200
25、1 1 Scope This standard specifies a method based on cup tests for determining the water vapour permeance of building products and the water vapour permeability of building materials under isothermal conditions. Different sets of test conditions are specified. The general principles are applicable to
26、 all hygroscopic and non hygroscopic building materials and products, including those with facings and integral skins. Annexes give details of test methods suitable for different material types. This standard is not applicable in the case of test specimens with water vapour diffusion-equivalent air
27、layer thickness values less than 0,1 m, as a result of increasing uncertainty in the measurement results. If the measured water vapour diffusion-equivalent air layer thickness is greater than 1500 m the material can be considered impermeable. The results obtained by this method are suitable for desi
28、gn purposes, production control and for inclusion in product specifications. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications a
29、re listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments)
30、. ISO 9346Thermal insulation - Mass transfer - Physical quantities and definitions Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 03:11:28 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 5 EN ISO 12572:2001 3 Definitions, symbols and units 3.1 Terms and definitions For the purposes of this s
31、tandard, the terms and definitions given in ISO 9346 and the following apply. 3.1.1 density of water vapour flow rate mass of water vapour transferred through the specimen per area and per time 3.1.2 homogeneous material material with properties likely to affect the transmission of water vapour whic
32、h do not vary on a macroscopic scale 3.1.3 water vapour permeance density of water vapour flow rate divided by the water vapour pressure difference between the two specimen faces 3.1.4 water vapour resistance reciprocal of water vapour permeance 3.1.5 water vapour permeability product of the water v
33、apour permeance and the thickness of a homogeneous specimen NOTE Water vapour permeability can only be calculated for specimens of a homogeneous material. 3.1.6 water vapour resistance factor water vapour permeability of air divided by that of the material concerned NOTE The water vapour resistance
34、factor indicates how much greater the resistance of the material is compared to an equally thick layer of stationary air at the same temperature. 3.1.7 water vapour diffusion-equivalent air layer thickness thickness of a motionless air layer which has the same water vapour resistance as the specimen
35、 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 03:11:28 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 6 EN ISO 12572:2001 3.2 Symbols and units SymbolQuantityUnit Aarea of specimenm2 Gwater vapour flow rate through specimenkg/s Rvgas constant for water vapour = 462N?m/(kg?K) Shydraulic di
36、ameter of specimenm Tthermodynamic temperatureK Wpwater vapour permeance with respect to partial vapour pressure kg/(m2?s?Pa) Zpwater vapour resistance with respect to partial vapour pressure m2?s?Pa/kg Dmean thickness of specimenm gdensity of water vapour flow ratekg/(m2?s) ldiameter of circle or s
37、ide of square specimenm mmass of specimen and cup assemblykg pbarometric pressurehPa p0standard barometric pressure = 1013,25hPa sdwater vapour diffusion-equivalent air layer thickness m ttimes ?pvwater vapour pressure difference across specimenPa ?pwater vapour permeability with respect to partial
38、vapour pressure kg/(m?s?Pa) ?awater vapour permeability of air with respect to partial vapour pressure kg/(m?s?Pa) ?water vapour resistance factor- ?Celsius temperature?C ?relative humidity- NOTE The above units comply with ISO 9346; a conversion table to other units commonly used in permeability me
39、asurements is given in annex J. 3.3 Subscripts SubscriptDenoting Iinterval rrepeatability aair ccorrected for air layer ffilm jjoint mmembrane memasked edge sspecimen ttotal Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 03:11:28 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 7 EN ISO 12572
40、:2001 4 Principle The test specimen is sealed to the open side of a test cup containing either a desiccant (dry cup) or an aqueous saturated solution (wet cup). The assembly is then placed in a temperature and humidity controlled test chamber. Because of the different partial vapour pressure between
41、 the test cup and the chamber, a vapour flow occurs through permeable specimens. Periodic weighings of the assembly are made to determine the rate of water vapour transmission in the steady state. 5 Apparatus a) Test cups resistant to corrosion from the desiccant or salt solutions they contain; typi
42、cally cups are made of glass or metal. The design of cups suitable for testing various different types of materials is described in annexes A to E. NOTE Circular cups can be easier to seal and transparent cups allow better control of salt solutions. b) For certain cups and sealing methods (see annex
43、 A), a template, with shape and size corresponding to that of the test cup, is used when applying the sealant to give a sharply defined, reproducible test area. The template shall have an area of at least 90 % of the specimen to limit non-linear vapour flow. c) Measuring instruments capable of deter
44、mining specimen thickness with accuracy required in 7.2. d) Analytical balance, capable of weighing the test assembly with the repeatability needed for the required accuracy. Wherever possible a balance of 0,001 g resolution shall be used. For heavy test assemblies a balance resolution of 0,01 g may
45、 be sufficient. See annex H for information linking the balance resolution to the duration of test. NOTE The factors that affect the necessary accuracy of measurement are discussed in annex H. e) Constant temperature, constant humidity chamber, capable of being maintained within ? 3 % relative humid
46、ity around the set point relative humidity and ? 0,5 K around the set point temperature. In order to ensure uniform conditions throughout the chamber, the air shall be stirred so as to obtain velocities between 0,02 m/s and 0,3 m/s. If highly permeable materials are being tested, means should be pro
47、vided to measure the air speed directly over the upper surface of the specimen - see annex G. f) Suitable sensors and a logging system to continuously record the temperature, relative humidity and, if necessary, the barometric pressure within the test chamber. The sensors shall be calibrated at regu
48、lar intervals. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 03:11:28 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 8 EN ISO 12572:2001 g) Sealant, which is impermeable to water vapour, does not undergo physical or chemical changes during the test and does not cause physical or chemical c
49、hanges to the specimen. NOTE Examples of sealants suitable for specific materials, if necessary, are listed in the appropriate annex. 6 Test specimens 6.1 General principles for preparation of test specimens The test specimens shall be representative of the product. If the product has natural skins or integral facings, these may be included in the test specimen, but they shall be removed if it is intended to measure the permeability of the core material. If the skins or facings are different on the two sides, specimens shall be tested with vapour flow in the dir
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