1、 Reference number ISO 12629:2011(E) ISO 2011INTERNATIONAL STANDARD ISO 12629 First edition 2011-01-15 Thermal insulating products for building equipment and industrial installations Determination of water vapour transmission properties of preformed pipe insulation Produits isolants thermiques pour l
2、es quipements des btiments et les installations industrielles Dtermination des proprits de transmission de la vapeur deau des coquilles isolantes prformes ISO 12629:2011(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be print
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7、11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2011 All rights reservedISO 12629:2011(E) ISO 2011 All rights reserved iiiContents Page Foreword iv 1 Scope1 2 Normative references1 3 Terms and definitions .2 4 Principle .2 5 Apparatus.3 6 Test specime
8、ns3 6.1 General .3 6.2 Dimensions of the test specimen 3 6.3 Number of test specimens .3 6.4 Conditioning of test specimens.4 7 Procedure.4 8 Calculation and expression of results 5 8.1 Water vapour flow rate5 8.2 Water vapour transmission rate 6 8.3 Water vapour permeance .6 8.4 Water vapour resist
9、ance.6 8.5 Water vapour permeability .6 8.6 Water vapour diffusion resistance factor .7 9 Accuracy of measurement .9 10 Test report9 Annex A (informative) Correction for air pressure variations during testing.11 Bibliography12 ISO 12629:2011(E) iv ISO 2011 All rights reservedForeword ISO (the Intern
10、ational Organization for Standardization) is a worldwide federation 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 b
11、een established has the right to be represented on that committee. 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 sta
12、ndardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies f
13、or voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. 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 a
14、ll such patent rights. ISO 12629 was prepared by Technical Committee ISO/TC 163, Thermal performance and energy use in the built environment, Subcommittee SC 1, Test and measurement methods. ISO 12629 includes the original EN 13469 prepared by Technical Committee CEN/TC 88 Thermal insulating materia
15、ls and products. However, Subclause 6.4, “conditioning of test specimen”, Clause 10, “test report” have been modified to reflect conditions for tropical countries. This International Standard is one of a series of standards which specify test methods for determining dimensions and properties of ther
16、mal insulating materials and products. The original EN 13469 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 r
17、elating to constructive products (Directive 89/106/EEC) through the consideration of the essential requirements. ISO 12629:2011(E) ISO 2011 All rights reserved vThis International Standard is one of a series of existing European Standards on test methods for products used to insulate building equipm
18、ent and industrial installations which is comprised of the following group of International Standards: ISO standard Title Respective EN standard ISO 12623 Thermal insulating products for building equipment and industrial installations Determination of short-term water absorption by partial immersion
19、 of preformed pipe insulation EN 13472 ISO 12624 Thermal insulation products Determination of trace quantities of water soluble chloride, fluoride, silicate, sodium ions and pH EN 13468 ISO 12628 Thermal insulating products for building equipment and industrial installations Determination of dimensi
20、ons, squareness and linearity of preformed pipe insulation EN 13467 ISO 12629 Thermal insulating products for building equipment and industrial installations Determination of water vapour transmission properties of preformed pipe insulation EN 13469 A further series of existing European Standards on
21、 test methods was adopted by ISO. This “package” of standards comprises the following group of interrelated standards: ISO Title Respective EN standard ISO 29465 Thermal insulating products for building applications Determination of length and width EN 822 ISO 29466 Thermal insulating products for b
22、uilding applications Determination of thickness EN 823 ISO 29467 Thermal insulating products for building applications Determination of squareness EN 824 ISO 29468 Thermal insulating products for building applications Determination of flatness EN 825 ISO 29469 Thermal insulating products for buildin
23、g applications Determination of compression behaviour EN 826 ISO 29470 Thermal insulating products for building applications Determination of the apparent density EN 1602 ISO 29471 Thermal insulating products for building applications Determination of dimensional stability under constant normal labo
24、ratory conditions (23 degrees C/50 % relative humidity) EN 1603 ISO 29472 Thermal insulating products for building applications Determination of dimensional stability under specified temperature and humidity conditions EN 1604 ISO 29764 Thermal insulating products for building applications Determina
25、tion of deformation under specified compressive load and temperature conditions EN 1605 ISO 29765 Thermal insulating products for building applications Determination of tensile strength perpendicular to faces EN 1607 ISO 29766 Thermal insulating products for building applications Determination of te
26、nsile strength parallel to faces EN 1608 ISO 29767 Thermal insulating products for building applications Determination of short-term water absorption by partial immersion EN 1609 ISO 12629:2011(E) vi ISO 2011 All rights reservedISO Title Respective EN standard ISO 29768 Thermal insulating products f
27、or building applications Determination of linear dimensions of test specimens EN 12085 ISO 29769 Thermal insulating products for building applications Determination of behaviour under point load EN 12430 ISO 29770 Thermal insulating products for building applications Determination of thickness for f
28、loating-floor insulating products EN 12431 ISO 29771 Thermal insulating materials for building applications Determination of organic content EN 13820 ISO 29803 Thermal insulation products for building applications Determination of the resistance to impact of external thermal insulation composite sys
29、tems (ETICS) EN 13497 ISO 29804 Thermal insulation products for building applications Determination of the tensile bond strength of the adhesive and of the base coat to the thermal insulation material EN 13494 ISO 29805 Thermal insulation products for building applications Determination of the mecha
30、nical properties of glass fibre meshes EN 13496 The Application of Agreement on technical cooperation between ISO and CEN (Vienna Agreement), Modes 1, 2, 4 and 5, was not approved by CEN/TC 88 and the necessity not seen by its stakeholders. INTERNATIONAL STANDARD ISO 12629:2011(E) ISO 2011 All right
31、s reserved 1Thermal insulating products for building equipment and industrial installations Determination of water vapour transmission properties of preformed pipe insulation 1 Scope This International Standard specifies the equipment and procedure for determining the water vapour transmission prope
32、rties 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 below) and for products which may have integral skins or adhered facings of some d
33、ifferent material. NOTE A material is considered to be homogeneous in terms of mass distribution if its density is approximatively the same throughout, i.e. if the measured density values are close to its mean density. The water vapour transmission rate and permeance values are specific to the test
34、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 flat product with simila
35、r properties in accordance with EN 12086. 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 amend
36、ments) applies. ISO 12628, Thermal insulating products for building equipment and industrial installations Determination of dimensions, squareness and linearity of preformed pipe insulation ISO 29768, Thermal insulating products for building applications Determination of linear dimensions of test sp
37、ecimens EN 12086, Thermal insulating products for building applications Determination of water vapour transmission properties ISO 12629:2011(E) 2 ISO 2011 All rights reserved3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 water vapour flow ra
38、te 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 permeance W quot
39、ient 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) 3.5 water vapour permeability product of the permeance and the thickness of the t
40、est specimen ( = W d) NOTE The water vapour permeability of a homogeneous product is a property of the material. It is the 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. 3.6 water
41、 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 NOTE It indicates the relative magnitude of the water vapour resistance of the product and that of an equally thick layer of sta
42、tionary 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 the partial water vapour pressures in the test assembly an
43、d 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. For products with a low water vapour transmission rate, special consideration has to be taken into a
44、ccount (see Annex A). ISO 12629:2011(E) ISO 2011 All rights reserved 35 Apparatus 5.1 Chamber, capable of being maintained within a temperature of (23 1) C and an RH (relative humidity) of (50 3) %. NOTE In order to maintain the required conditions throughout the chamber, it can be necessary to use
45、air circulation with an air speed between 0,02 m/s to 0,3 m/s. 5.2 Desiccant, anhydrous calcium chloride (CaCl 2 ) with particle size 2 mm to 15 mm (RH 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 bet
46、ter. If larger test assemblies are used, the weighing accuracy may be determined with respect to the total weight 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 ISO 29768 or ISO
47、 12628, whichever is relevant. 5.5 Aluminium foil, water vapour diffusion tight (at least 50 m thick) protected with a polymer film on the face in contact with the calcium chloride (CaCl 2 ). 5.6 Adhesive, suitable to make a water-vapour-tight joint between the aluminium foil and the test specimen (
48、see relevant product standard). NOTE Any combination of foil or sealant and adhesive which provides comparable results can 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 mater
49、ials. Pipe insulation pieces (half sections or segments) shall be placed together using an appropriate sealant or adhesive to form a full size pipe insulation test specimen. NOTE For faced or coated products with a water vapour diffusion resistance factor u 3, for the core material, the permeability can be determined from measurements made on the facing/coating itself, after separation from the product. For pipe insulations with large dimensions, test specimen of the f
