SIST EN 15803:2010

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.97.195Umetniški in obrtniški izdelkiItems of art and handicraftsICS:Ta slovenski standard je istoveten z:EN 15803:2009SIST EN 15803:2010en,de01-februar-2010SIST EN 15803:2010SLOVENSKI
STANDARD



SIST EN 15803:2010



EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 15803
December 2009 ICS 97.195 English Version
Conservation of cultural property - Test methods - Determination of water vapour permeability (/p)
Conservation des biens culturels - Méthodes d'essai - Détermination de la perméabilité à la vapeur d'eau (/p)
Erhaltung des kulturellen Erbes - Prüfverfahren - Bestimmung des Wasserdampfleitkoeffizienten (/p) This European Standard was approved by CEN on 7 November 2009.
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 such national standards may be obtained on application to the CEN 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 own language and notified to the CEN Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2009 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 15803:2009: ESIST EN 15803:2010



EN 15803:2009 (E) 2 Contents Page Foreword .3Introduction .41Scope .52Normative references .53Terms and definitions .54Principle .65Symbols and abbreviations .66Test equipment .77Preparation of
test specimens . 107.1Number and dimensions of test specimens . 108Test procedure . 108.1General . 108.2Test environmental conditions . 108.3Procedure . 119Expression of results . 119.1Cumulative mass change and density of water vapour flow rate . 119.2Water vapour permeance . 129.3Water vapour permeability . 129.4Water vapour diffusion resistance coefficient . 129.5Water vapour diffusion-equivalent air layer thickness . 1210Test report . 12Bibliography . 14 SIST EN 15803:2010



EN 15803:2009 (E) 3 Foreword This document (EN 15803:2009) has been prepared by Technical Committee CEN/TC 346 “Conservation of cultural property”, the secretariat of which is held by UNI. 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 June 2010 and conflicting national standards shall be withdrawn at the latest by June 2010. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
SIST EN 15803:2010



EN 15803:2009 (E) 4 Introduction This test method can be applied if it does not change the value of the cultural property and follows relevant ethical codes of conservation practice. SIST EN 15803:2010



EN 15803:2009 (E) 5 1 Scope This European Standard specifies a method for determining the water vapour permeability (WVP) of porous inorganic materials used for and constituting cultural property. The method may be applied to porous inorganic materials either untreated or subjected to any treatment or ageing. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. prEN 15898:2009, Conservation of cultural property — Main general terms and definitions concerning conservation of cultural property 3 Terms and definitions For the purposes of this document, the terms and definitions given in prEN 15898:2009 and the following apply. 3.1 porous inorganic materials materials including natural stones, e.g. sandstone, limestone, marble, as well as artificial materials, such as mortar, plaster, brick and others 3.2 water vapour flow rate G mass of water vapour transferred through the specimen per time 3.3 density of water vapour flow rate vapour transmission rate
g mass of water vapour transferred through the specimen per time and per unit area 3.4 water vapour permeance Wp value of the mass of water vapour diffused through a specimen, induced by a partial vapour pressure gradient through the specimen, per unit area, time and partial vapour pressure difference 3.5 water vapour permeability /p product of the water vapour permeance and the thickness of a homogeneous specimen 3.6 water vapour permeability of air /a
water vapour permeability of air /a is defined by the Schirmer equation: /a = 0,000 023 1 (po/(p × R × T)) × (T/273 K)1,81 kg/(m⋅s⋅Pa)
(1) SIST EN 15803:2010



EN 15803:2009 (E) 6 where po is the standard barometric pressure (= 1 013,25 hPa); p is the barometric pressure (hPa); T is the temperature (K); R is the gas constant for water vapour (= 462 Nm/(kg⋅K)) 3.7 water vapour diffusion resistance coefficient µ water vapour permeability of air divided by that of the material concerned 3.8 water vapour diffusion-equivalent air layer thickness sd
value of a specimen which indicates the thickness of a motionless air layer that has the same water vapour resistance as the specimen of thickness D. The sd value can be obtained in two ways: i) by multiplication of the µ-value with the thickness D of the specimen; ii) from the water vapour permeability of air /a divided by the water vapour permeance of the specimen Wp 4 Principle Determination of the water vapour flow through the specimen subjected to different partial water vapour pressures. 5 Symbols and abbreviations For the purposes of this document, the following symbols and abbreviations apply: m
mass of specimen and cup assembly, in kg D mean thickness of specimen, in m A test surface area, in m²
t time, in s G water vapour flow rate through specimen, in kg/s g density of water vapour flow rate, in kg/(m²⋅s) ∆pv water vapour pressure difference across the specimen, in Pa Wp water vapour permeance with respect to partial vapour pressure, in kg/(m²⋅s⋅Pa) δp water vapour permeability with respect to partial vapour pressure, in kg/(m⋅s⋅Pa) δa water vapour permeability of air, in kg/(m⋅s⋅Pa) SIST EN 15803:2010



EN 15803:2009 (E) 7 µ water vapour diffusion resistance coefficient (-) sd water vapour diffusion-equivalent air layer thickness, in m 6 Test equipment 6.1 Test set-ups: two types of cup systems are possible as presented in Figure 1 and Figure 2. The cup’s weight should be compatible with the measurement method which needs the use of an analytical balance. Test cups shall be resistant to corrosion from the desiccant or salt solutions. Typically cups
...