1、BSI Standards PublicationThermal insulation forbuildings Reflectiveinsulation products Determination of the declaredthermal performanceBS EN 16012:2012+A1:2015BS EN 16012:2012+A1:2015National forewordThis British Standard is the UK implementation of EN 16012:2012+A1:2015. It supersedes BS EN 16012:2
2、012 which is withdrawn.The start and finish of text introduced or altered by amendment is indicated in the text by tags. Tags indicating changes to CEN text carry the number of the CEN amendment. For example, text altered by CEN amendment A1 is indicated by !“.The UK participation in its preparation
3、 was entrusted by Technical Committee B/540, Energy performance of materials components and buildings, to Subcommittee B/540/9, Reflective insulation and in-situ testing.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purpor
4、t to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2015. Published by BSI Standards Limited 2015ISBN 978 0 580 85189 6ICS 91.100.60Compliance with a British Standard cannot confer immunity fromlegal obligation
5、s.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 29 February 2012.Amendments/corrigenda issued since publicationDate Text affected31 March 2015 Implementation of CEN amendment A1:2015BRITISH STANDARDEUROPEAN STANDARD NORME EUROPENNE EUROPISC
6、HE NORM EN 16012:2012+A1 February 2015 ICS 91.100.60 Supersedes EN 16012:2012English Version Thermal insulation for buildings - Reflective insulation products -Determination of the declared thermal performance Isolation thermique des btiments - Produits disolation rflchissants - Dtermination de la p
7、erformance thermique dclare Wrmedmmstoffe fr Gebude - Reflektierende Wrmedmm-Produkte - Bestimmung der Nennwerte der wrmetechnischen Eigenschaften This European Standard was approved by CEN on 23 December 2011 and includes Amendment 1 approved by CEN on 29 November 2014. CEN members are bound to com
8、ply 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-CENELE
9、C 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-CENELEC Management Centre has the s
10、ame 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, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembour
11、g, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2
12、015 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 16012:2012+A1:2015 E2 Contents Page Foreword 4 Introduction . 5 1 Scope 6 2 Normative references 6 3 Terms, definitions, symbols and units 7 3.1 Terms and definitions . 7 3.2 Symb
13、ols and units . 7 4 Description of product types 8 4.1 Product classification . 8 4.2 Product Type 1 . 8 4.3 Product Type 2 . 9 4.4 Product Type 3 . 9 4.5 Product Type 4 . 10 5 Methods of assessment 11 5.1 General 11 5.2 Thickness measurement . 11 5.3 !Test specimens“ . 11 5.4 Determination of therm
14、al resistance outline . 11 5.5 Determination of core thermal resistance of Product Type 1 . 12 5.6 Determination of core thermal resistance of Product Type 2 . 13 5.7 Determination of core thermal resistance of Product Type 3 (METHOD C) 13 5.8 Determination of the thermal performance of Product Type
15、 4 . 18 5.9 Emissivity . 19 6 Uncertainty . 20 6.1 General 20 6.2 Thickness measurements . 20 6.3 Use of surface thermocouples on thin samples in a guarded hot plate or in heat flow meter measurement . 20 6.4 Use of dummy insulation specimens 20 6.5 Derivation of the core resistance of a Type 3 Prod
16、uct from hot box measurements. 20 7 Expression of results 21 7.1 Results derived from hot plate and emissivity measurements (Products Type 1 high emissive standard: black light trap surface. Calibration standards shall be certified by the manufacturer of the apparatus or by an independent institute,
17、 accompanied by a certificate showing the measured emissivity. The calibration standards shall be recertified (or replaced by new certified standards) at least every two years. BS EN 16012:2012+A1:2015 EN 16012:2012+A1:2015 (E)28 D.4 Calculation of the emissivity The emissivity is determined from co
18、mparing the measured result for the specimen with the two calibration standards. With the sensor signals (U, UHand UL) and the known emissivity of calibration standards (Land H), the emissivity, , of the specimen shall be calculated by: = H- (H- L) (UH- U) / (UH- UL) (D.1) NOTE The measurement range
19、 of the apparatus is limited to values between those of the two calibration standards used, hence within the emissivity range of 0,020,94. However, there are practical limits to the measurement of very low values of emissivity, irrespective of the method used. Errors increase significantly below emi
20、ssivity 0,05. D.5 Sampling and preparation of the test specimens D.5.1 Sampling A sample of an undamaged reflective insulation product shall be selected at random from a batch of production material or from product placed on the market. D.5.2 Dimensions and numbers of specimens !A minimum of three s
21、pecimens should be taken from the sample to be representative of the length and width of the product to include a representative area of any printing or perforation where relevant. If the faces of the product differ then a minimum of three specimens shall be taken from each face. The specimen size s
22、hould be adapted to the size of the specimen holder and to the fixing system of the specimen holder (see D.6), but shall be at least 250 mm by 250 mm.“ D.5.3 Conditioning of specimens for ageing The specimens shall be exposed in a climatic chamber to 90 % relative humidity and 70 C temperature for a
23、 period of 28 days. The edges of the specimens shall be adequately protected by securing self-adhesive aluminium foil tape around each edge of the specimen from the upper surface to the lower surface, to prevent ingress of moisture through the cut edge. After the conditioning process, the specimens
24、shall then be allowed to stabilize for a minimum of two hours at a temperature of (23 2) C and relative humidity of (50 20) %. D.6 Procedure for measurement of specimens The apparatus shall be switched on at least 2 hours before calibration and before commencing measurements. The apparatus shall be
25、installed in a fixed position and shall not be moved during measurement. Special precautions should be taken to ensure that the calibration standards, the specimens and the apparatus are brought to equilibrium in the same standard climatic conditions. Air currents and draughts in the measuring area
26、shall be avoided. The specimen shall be brought up to the apparatus in a vertical orientation, pressed against the spacers around the measuring window of the apparatus and the apparatus shall be activated to begin measurement. The emissivity shall be measured in five positions on each specimen. In o
27、rder to avoid changes in the specimen temperature during the measurement, the time that the specimen is left in the measuring position shall be reduced to a minimum. Between specimen positioning and start of measurement, no more than 1 second shall pass. If this speed of measurement is not achieved,
28、 or if the measurement is otherwise interrupted, or if the measurement on a specimen is to be repeated, the specimen should be withdrawn from the apparatus for the time it needs to cool down to laboratory temperature. Rapid movement of the specimen over the apparatus while measuring is possible, but coupling of the specimen to a massive aluminium block by heat conductance paste gives the most consistent results. The higher the emissivity and/or the lower the BS EN 16012:2012+A1:2015 EN 16012:2012+A1:2015 (E)
