1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 13469:2012Thermal insulating productsfor building equipment andindustrial installations Determination of water vapourtransmission properties ofpreformed pipe insulationBS E
2、N 13469:2012 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 13469:2012. Itsupersedes BS EN 13469:2001 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee B/540, Energy performance of materials components andbuildings.A
3、 list of organizations represented on this committee 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 2013. Published by BSI Standards
4、Limited 2013ISBN 978 0 580 77437 9ICS 91.100.60Compliance 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 January 2013.Amendments issued since publicationDate Text affecte
5、dBS EN 13469:2012EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 13469 October 2012 ICS 91.100.60 Supersedes EN 13469:2001English Version Thermal insulating products for building equipment and industrial installations - Determination of water vapour transmission properties of preformed pipe ins
6、ulation Produits isolants thermiques pour lquipement du btiment et les installations industrielles - Dtermination des proprits de transmission de la vapeur deau des coquilles isolantes prformes Wrmedmmstoffe fr die Haustechnik und fr betriebstechnische Anlagen - Bestimmung der Wasserdampfdurchlssigk
7、eit von vorgeformten Rohrdmmstoffen This European Standard was approved by CEN on 24 August 2012. 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
8、-date lists and bibliographical references concerning such 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 translat
9、ion under the responsibility of a CEN member into its own 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,
10、Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION CO
11、MIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 13469:2012: EBS EN 13469:2012EN 13469:2012 (E) 2 Contents Page Fo
12、reword 31 Scope 42 Normative references 43 Terms and definitions .44 Principle 55 Apparatus .56 Test specimens 56.1 General 56.2 Dimensions of the test specimen .66.3 Number of test specimens 66.4 Conditioning of test specimens .67 Procedure .68 Calculation and expression of results .78.1 Water vapo
13、ur flow rate 78.2 Water vapour transmission rate .88.3 Water vapour permeance 88.4 Water vapour resistance .98.5 Water vapour permeability 98.6 Water vapour diffusion resistance factor 98.6.1 General 98.6.2 Calculation of air . 108.6.3 Calculation of . 118.6.4 Calculation of . 129 Accuracy of measur
14、ement . 1210 Test report . 12Bibliography . 14BS EN 13469:2012EN 13469:2012 (E) 3 Foreword This document (EN 13469:2012) has been prepared by Technical Committee CEN/TC 88 “Thermal insulating materials and products”, the secretariat of which is held by DIN. This European Standard shall be given the
15、status of a national standard, either by publication of an identical text or by endorsement, at the latest by April 2013, and conflicting national standards shall be withdrawn at the latest by April 2013. Attention is drawn to the possibility that some of the elements of this document may be the sub
16、ject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 13469:2001. The following main technical changes have been implemented in this new edition of EN 13469: a) the content of Annex A “Correction for air pre
17、ssure variations during test“ has been included in the main part of the standard and the annex has been deleted; b) the document has been editorially updated. This European Standard is one of a series of standards which specify test methods for determining dimensions and properties of thermal insula
18、ting materials and products. It supports a series of product standards for thermal insulating materials and products which derive from the Council Directive of 21 December 1988 on the approximation of laws, regulations and administrative provisions of the Member States relating to construction produ
19、cts (Directive 89/106/EEC) through the consideration of the essential requirements. This European Standard has been prepared for products used to insulate building equipment and industrial installations, but it may also be applied to products used in other areas. According to the CEN/CENELEC Interna
20、l Regulations, the national standards organisations of the following countries are 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, Irel
21、and, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 13469:2012EN 13469:2012 (E) 4 1 Scope This European Standard specifies the equipment and procedure for determining th
22、e water vapour transmission properties in the steady state under specified test conditions for test specimens of preformed pipe insulation. It is applicable to thermal insulating products. It is intended to be used for homogeneous materials (see NOTE) and for products which may have integral skins o
23、r adhered facings of some different material. NOTE A material is considered to be homogeneous in terms of mass distribution if its density is approximately the same throughout, i.e. if the measured density values are close to its mean density. The water vapour transmission rate and permeance values
24、are specific to the test specimen (i.e. the product) thickness tested. For homogeneous products, the water vapour permeability is a property of the material. If the pipe insulation is cut from a flat product, then the water vapour transmission properties can be obtained from tests carried out on the
25、 flat product with similar properties in accordance with EN 12086. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references,
26、 the latest edition of the referenced document (including any amendments) applies. EN 12085, Thermal insulating products for building applications Determination of linear dimensions of test specimens EN 12086, Thermal insulating products for building applications Determination of water vapour transm
27、ission properties EN 13467, Thermal insulating products for building equipment and industrial installations Determination of dimensions, squareness and linearity of preformed pipe insulation 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 wat
28、er vapour flow rate G quantity of water vapour transmitted through the surface of the test specimen in unit time 3.2 water vapour transmission rate g quantity of water vapour transmitted through unit area in unit time under specified conditions of temperature, humidity and thickness 3.3 water vapour
29、 permeance W quotient of water vapour transmission rate of the test specimen and the water vapour pressure difference between the test specimen faces during the test 3.4 water vapour resistance Z inverse of water vapour permeance (1/W) BS EN 13469:2012EN 13469:2012 (E) 5 3.5 water vapour permeabilit
30、y quantity of water vapour transmitted per unit of time through a unit area of the product per unit of vapour pressure difference between its faces for a unit thickness Note 1 to entry: Water vapour permeability is a product of the permeance and the thickness of the test specimen ( = W d). It is a p
31、roperty of the material of a homogeneous product. 3.6 water vapour diffusion resistance factor quotient of the water vapour permeability of air and the water vapour permeability of the material or the homogeneous product concerned which indicates the relative magnitude of the water vapour resistance
32、 of the product and that of an equally thick layer of stationary air at the same temperature 4 Principle A desiccant filled “dry-cup“ made from a preformed pipe insulation test specimen is placed in a test atmosphere whose temperature and humidity are controlled. Because of the difference between th
33、e partial water vapour pressures in the test assembly and in the test atmosphere, water vapour flows through the test specimen. Periodic weighings of the assembly are made to determine the rate of water vapour transmission when the steady state is reached. 5 Apparatus 5.1 Chamber, capable of being m
34、aintained within a temperature of (23 1) C and a relative humidity (50 3) %. In order to maintain the required conditions throughout the chamber, it may be necessary to use air circulation with an air speed between 0,02 m/s to 0,3 m/s. 5.2 Desiccant, anhydrous calcium chloride (CaCl2) with particle
35、size 2 mm to 15 mm (relative humidity 0 %) or any other desiccant that gives the same results. 5.3 Analytical balance, capable of weighing the test assembly to an accuracy of 1 mg or better. If larger test assemblies are used, the weighing accuracy may be determined with respect to the total weight
36、and the required accuracy of the test results. 5.4 Measuring instruments, capable of determining linear dimensions and thicknesses in accordance with the requirements of EN 12085 or EN 13467, whichever is relevant. 5.5 Aluminium foil, water vapour diffusion tight (at least 50 m thick) protected with
37、 a polymer film on the face in contact with the calcium chloride (CaCl2). 5.6 Adhesive, suitable to make water vapour tight joint between the aluminium foil and the test specimen (see relevant product standard). Any combination of foil or sealant and adhesive, which provides comparable results, may
38、be used. 6 Test specimens 6.1 General The test specimens shall be representative of the product and shall include any natural surface skins or adhered facings of different materials. BS EN 13469:2012EN 13469:2012 (E) 6 Pipe insulation pieces (half sections or segments) shall be placed together using
39、 an appropriate sealant or adhesive to form a full size pipe insulation test specimen. For faced and/or coated products with a water vapour diffusion resistance index 3, for the core material, the permeability may be determined from measurements made on the facing/coating itself, after separation fr
40、om the product. For pipe insulations with large dimensions, test specimens of the facing and/or coating may be cut out and tested according to EN 12086. 6.2 Dimensions of the test specimen Cut the test specimens to a minimum length of (100 1) mm; for outside diameters greater than 100 mm the length
41、shall be at least 150 mm. The cut surfaces shall be as flat as possible, equally formed and perpendicular to the vertical axis of the test specimen. The thickness of the test specimen shall be the thickness of the product. 6.3 Number of test specimens The number of test specimens shall be as specifi
42、ed in the relevant product standard. If the number is not specified, then at least five test specimens shall be used. In addition to the specified test specimens, one test specimen, “dummy”, identical to the others but not filled with desiccant shall be prepared. This “dummy” shall be included in th
43、e test procedure. Its weight changes during the test procedure are not caused by water vapour diffusion but by e.g. gas or humidity evaporation/absorption or air pressure variations. The weight changes of the test specimens have to be corrected by the weight changes of the dummy. NOTE Information on
44、 the use of a “dummy“ test specimen can be found in Hansen, K. K. and Lund, H.B.: “Cup Method for Determination of Water Vapour Transmission Properties of Building Materials. Sources of Uncertainty in the Method“ 2. In the absence of a product standard or any other European Technical Specification,
45、the method of selection of the test specimens may be agreed between parties. 6.4 Conditioning of test specimens The test specimens shall be stored for at least 6 h at (23 5) C. In case of dispute, they shall be stored at (23 2) C and (50 5) % relative humidity for the time stated in the relevant pro
46、duct standard. 7 Procedure Bond the test specimen to the aluminium foil (see 5.5), at one end, to achieve a water vapour tight joint. Place sufficient desiccant within the test specimen to maintain zero percent relative humidity throughout the test. The quantity of desiccant shall not be greater tha
47、n 2/3 of the enclosed volume. Prepare also one test specimen, “dummy”, identical to the others but not filled with desiccant. Close the open end of the test specimen as in the first paragraph. Bubbles under the foil should be avoided, and the bond between the foil and the test specimen should be suc
48、h that any attempt to separate the foil from the test specimen breaks the test specimen rather than the bond. BS EN 13469:2012EN 13469:2012 (E) 7 In case of products with a low water vapour transmission rate, the borderline between the foil and the test specimen may be sealed in addition with a seal
49、ant (e.g. wax) in such a way that the reduction in free surface is not significant. Immerse the test specimens in the test chamber (see Figure 1) at (23 1) C and (50 3) % relative humidity. Avoid contact between the test specimens. Condition the test specimens in the test chamber for a period between 1 h and 24 h. Weigh the test specimens at regular intervals. The weighing shall be carried out under the same conditions as exist in the test chamber. If the weighing is
