1、BS EN ISO 12572:2016Hygrothermal performanceof building materials andproducts Determination ofwater vapour transmissionproperties Cup method(ISO 12572:2016)BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06BS EN ISO 12572:2016 BRITISH STANDARDNational forewordThis Brit
2、ish Standard is the UK implementation of EN ISO12572:2016. It supersedes BS EN ISO 12572:2001 which iswithdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee B/540, Energy performance of materials components andbuildings.A list of organizations represented on this commi
3、ttee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2016.Published by BSI Standards Limited 2016ISBN 978 0 580 85191 9ICS 91.100.01C
4、ompliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 August 2016.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dEUROPEAN STANDARD NORME EUR
5、OPENNE EUROPISCHE NORM EN ISO 12572 August 2016 ICS 91.120.10 Supersedes EN ISO 12572:2001English Version Hygrothermal performance of building materials and products - Determination of water vapour transmission properties - Cup method (ISO 12572:2016) Performance hygrothermique des matriaux et produ
6、its pour le btiment - Dtermination des proprits de transmission de la vapeur deau - Mthode de la coupelle (ISO 12572:2016) Wrme- und feuchtetechnisches Verhalten von Baustoffen und Bauprodukten - Bestimmung der Wasserdampfdurchlssigkeit - Verfahren mit einem Prfgef (ISO 12572:2016) This European Sta
7、ndard was approved by CEN on 16 July 2016. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning s
8、uch national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its o
9、wn language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany,
10、 Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey andUnited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORM
11、UNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2016 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 12572:2016 EBS EN ISO 12572:2016EN ISO 12572:2016 (E) 3 European foreword This document (EN ISO 12572:201
12、6) 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 163 “Thermal performance and energy use in the built environment”. This European Standard shall b
13、e given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by February 2017, and conflicting national standards shall be withdrawn at the latest by February 2017. Attention is drawn to the possibility that some of the elements of this docum
14、ent may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN ISO 12572:2001. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are
15、bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Port
16、ugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 12572:2016 has been approved by CEN as EN ISO 12572:2016 without any modification. BS EN ISO 12572:2016ISO 12572:2016(E)Foreword v1 Scope . 12 Normative references 13 Term
17、s, definitions, symbols, units and subscripts 13.1 Terms and definitions . 13.2 Symbols and units 23.3 Subscripts 34 Principle 35 Apparatus . 36 Test specimens 46.1 General principles for preparation of test specimens . 46.2 Dimensions of test specimens . 46.2.1 Shape and fit 46.2.2 Exposed area . 4
18、6.2.3 Thickness of test specimens 46.3 Number of test specimens . 56.4 Conditioning of test specimens . 56.5 Testing low resistance specimens 57 Procedure. 57.1 Test conditions 57.2 Preparation of specimen and test assembly 77.3 Test procedure . 78 Calculation and expression of results . 88.1 Mass c
19、hange rate . 88.2 Density of water vapour flow rate 98.3 Water vapour permeance 98.4 Water vapour resistance 108.5 Water vapour permeability . 108.6 Water vapour resistance factor 108.7 Water vapour diffusion-equivalent air layer thickness .119 Accuracy of measurement .119.1 General 119.2 Specimen a
20、rea . 119.3 Specimen thickness 119.4 Sealants 129.5 Weighing precision . 129.6 Control of environmental conditions 129.7 Variations in barometric pressure during test . 1210 Test report 12Annex A (normative) Methods suitable for self-supporting materials 14Annex B (normative) Methods suitable for lo
21、ose fills .16Annex C (normative) Methods suitable for membranes and foils 18Annex D (normative) Methods suitable for mastics and sealants 19Annex E (normative) Methods suitable for paint, varnishes, etc.21Annex F (normative) Correction for the effect of a masked edge of a specimen .22Annex G (normat
22、ive) Correction for resistance of air layers .24 ISO 2016 All rights reserved iiiContents PageBS EN ISO 12572:2016ISO 12572:2016(E)Annex H (normative) Method for calculating the water vapour resistance of the air layer in the cup 25Annex I (informative) Weighing repeatability, weighing interval and
23、specimen size needed to achieve desired accuracy .26Annex J (informative) Conversion table for water vapour transmission units27Bibliography .28iv ISO 2016 All rights reservedBS EN ISO 12572:2016ISO 12572:2016(E)ForewordISO (the International Organization for Standardization) is a worldwide federati
24、on of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee
25、. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and tho
26、se intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (
27、see www.iso.org/directives).Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the doc
28、ument will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents).Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and
29、 expressions related to conformity assessment, as well as information about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html ISO 12572 was prepared by the European Committee Standardization (
30、CEN) Technical Committee CEN/TC 89, Thermal performance of buildings and building components, in collaboration with ISO Technical Committee ISO/TC 163, Thermal performance and energy use in the built environment, Subcommittee SC 1, Test and measurement methods, in accordance with the agreement on te
31、chnical cooperation between ISO and CEN (Vienna Agreement).This second edition cancels and replaces the first edition (ISO 12572:2001), which has been technically revised with the following changes: addition of insulation materials in the Scope; addition of e) humidity chamber in Clause 5; addition
32、of requirements regarding thickness of test specimen to measure the permeability of core materials in 6.2.3; change of specimen area size in 6.3; addition of requirements for storage time and relative humidity for condition D in 6.4; new clause with requirements in 6.5; change of requirements for te
33、mperature and relative humidity for test conditions in 7.1; change of the calculation of mass change rate in 8.1; removal of 9.8. ISO 2016 All rights reserved vBS EN ISO 12572:2016BS EN ISO 12572:2016Hygrothermal performance of building materials and products Determination of water vapour transmissi
34、on properties Cup method1 ScopeThis document 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 principl
35、es are applicable to all hygroscopic and non-hygroscopic building materials and products, including insulation materials and including those with facings and integral skins. Annexes give details of test methods suitable for different material types.The results obtained by this method are suitable fo
36、r design purposes, production control and for inclusion in product specifications.2 Normative referencesThe following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies.
37、 For undated references, the latest edition of the referenced document (including any amendments) applies.There are no normative references in this document.3 Terms, definitions, symbols, units and subscripts3.1 Terms and definitionsFor the purposes of this document, the terms and definitions given
38、in ISO 9346 and the following apply.ISO and IEC maintain terminological databases for use in standardization at the following addresses: IEC Electropedia: available at http:/www.electropedia.org/ ISO Online browsing platform: available at http:/www.iso.org/obp3.1.1density of water vapour flow ratema
39、ss of water vapour transferred through the specimen per area and per time3.1.2homogeneous materialmaterial with properties likely to affect the transmission of water vapour which do not vary on a macroscopic scale3.1.3impermeable materialmaterial with a measured water vapour diffusion-equivalent air
40、 layer thickness (3.1.8) greater than 1 500 m3.1.4water vapour permeancedensity of water vapour flow rate (3.1.1) divided by the water vapour pressure difference between the two specimen facesINTERNATIONAL STANDARD ISO 12572:2016(E) ISO 2016 All rights reserved 1BS EN ISO 12572:2016ISO 12572:2016(E)
41、3.1.5water vapour resistancereciprocal of water vapour permeance (3.1.4)3.1.6water vapour permeabilityproduct of the water vapour permeance (3.1.4) and the thickness of a homogeneous specimenNote 1 to entry: Water vapour permeability can only be calculated for specimens of a homogeneous material (3.
42、1.2).3.1.7water vapour resistance factorwater vapour permeability (3.1.6) of air divided by that of the material concernedNote 1 to entry: The water vapour resistance factor indicates how much greater the resistance of the material is compared to an equally thick layer of stationary air at the same
43、temperature.3.1.8water vapour diffusion-equivalent air layer thicknessthickness of a motionless air layer which has the same water vapour resistance (3.1.5) as the specimen3.2 Symbols and unitsSymbol Quantity UnitA area of specimen m2G water vapour flow rate through specimen kg/sRvgas constant for w
44、ater vapour = 462 Nm/(kgK)S hydraulic diameter of specimen mT thermodynamic temperature KWpwater vapour permeance with respect to partial vapour pressurekg/(m2sPa)Zpwater vapour resistance with respect to partial vapour pressurem2sPa/kgd mean thickness of specimen mg density of water vapour flow rat
45、e kg/(m2s)l diameter of circle or side of square specimen mm mass of specimen and cup assembly kgp barometric pressure hPap0standard barometric pressure = 1 013,25 hPaSdwater vapour diffusion-equivalent air layer thickness mt time spvwater vapour pressure difference across specimen Papwater vapour p
46、ermeability kg/(msPa)awater vapour permeability of air kg/(msPa) 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 measurements is given in Annex J.2 ISO 2016 All rights re
47、servedBS EN ISO 12572:2016ISO 12572:2016(E)3.3 SubscriptsSubscript DenotingI intervalr repeatabilitya airc corrected for air layerf filmj jointm membraneme masked edges speciment total4 PrincipleThe test specimen is sealed to the open side of a test cup containing either a desiccant (dry cup) or an
48、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 the test cup and the chamber, a vapour flow occurs through permeable specimens. Periodic weighings of the assembly are mad
49、e to determine the rate of water vapour transmission in the steady-state.5 Apparatusa) Test cups resistant to corrosion from the desiccant or salt solutions they contain; typically cups aremade of glass or metal.The design of cups suitable for testing various different types of materials is described inAnnexes 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 A), a template, with shape and size corresp
