ASSOCIATION POUR LA CERTIFICATION DES MATERIAUX ISOLANTS

Transcription

1 Revson ndex Date of mplementaton C 15/03/017 Techncal Specfcaton E ASSOCIATIO POUR LA CERTIFICATIO DES MATERIAUX ISOLATS 4, avenue du Recteur-Poncaré, 7578 Pars Cedex 16 Tel. 33.(0) Fax. 33.(0) ASSOCIATIO DECLAREE (LOI DU 1ER JUILLET 1901) ORGAISME CERTIFICATEUR AGREE 19 (LOI 783 DU 10 JAVIER 1978) CSTB - LE

2 Table of contents TABLE OF COTETS... 1 PRICIPLE... 3 COMPLIACE CRITERIA OF THE DECLARED THERMAL VALUE COMPLIACE TEST FOR PRODUCTS WITH A SIGLE THERMAL CODUCTIVITY COMPLIACE TEST FOR PRODUCTS CHARACTERISED BY SEVERAL THERMAL CODUCTIVITY RAGES ("MULTI-LAMBDA" TEST) 4.3 COMPLIACE TEST FOR PRODUCTS FOR WHICH OLY THE THERMAL RESISTACE R CA BE CERTIFIED COMPLIACE TEST FOR BULK PRODUCTS FOR WHICH THE THERMAL CODUCTIVITY IS MODELLED ACCORDIG TO THE DESITY... 7

3 1 Prncple Complance testng s the perodcal checkng of the values declared by the manufacturer by the Acerm lead member. Ths verfcaton s based frstly on measurements made by ths lead member, together wth a statstcal calculaton to check the relablty of the declared value n relaton to the test values obtaned. Complance crtera of the declared thermal value The declaraton of the thermal value s based on: the thckness of the product the effect of ageng the nfluence of humdty the densty of the product emssvty The condtons relatng to these crtera are defned n the techncal product standards. For the thermal characterstcs, complance s checked accordng to one of the followng methods..1 Complance test for products wth a sngle thermal conductvty.1.1 Measurements The number of samples taken for a product or group of products for whch a sngle thermal conductvty value s declared by the manufacturer depends on the number of lnes n whch the product or group of products s manufactured: 1 to 4 lnes: 4 samples are taken (coverng all the lnes). Beyond 4 lnes: the number of samples taken s equal to the number of lnes. The value of each sample s obtaned from the arthmetcal mean of the measurements from m test specmens or pars of specmens (for measurng devces havng two), cut to the dmensons of the measurng devce, m beng dependant on the surface area S of the test specmens, such that: m = 1 S 0.5 m m = 0.06 m S < 0.5 m m = m S < 0.06 m The results are rounded to the nearest 0.1 mw/(m.k). 3

4 .1. Calculaton For n samples taken by the lead member, the mean value and standard devaton for thermal conductvty are calculated as follows: n 1 n s n ( - ) 1 n 1 The used are the values before roundng The parameter s defned, gven n the followng table accordng to the number of samples: n Dependng on the bass opted for by the manufacturer to calculate the declared thermal resstances, the thermal conductvty used for the calculaton s: λ D, the thermal conductvty value declared by the manufacturer when ths value s used to calculate the declared thermal resstance(s) R D λ 90/90, the conductvty value at fractle 90/90 determned n agreement wth the lead member, rounded to the nearest 0.1 mw/(m.k), when ths s used to calculate the declared thermal resstance(s) R D The product s then deemed complant f the followng nequaton s checked: D s 90 / 90 or s Moreover, f the manufacturer wshes to obtan key-mark certfcaton for ts product, the keymark rules apply.. Complance test for products charactersed by several thermal conductvty ranges ("mult-lambda" test) Ths s the case for manufactured products n whch the layers are not all thermally dentcal (products wth multple thermal conductvty), and bulk products for whch the thermal conductvty s defned by densty range. In these stuatons, for products n slabs, panels and rolls, a sngle test s performed per product, both for admsson and follow-up. For bulk products, the complance test selected s 4

5 that n paragraph.1 for each densty range for acceptance, whereas a sngle test s performed per product for follow-up purposes, accordng to the methods descrbed below. Ths test takes nto account the dfferent thermal conductvty ranges, and the number of samples requred s therefore ncreased n relaton to paragraph.1. The complance test s only possble f the populaton spread s dentcal n each factory (product manufactured n several factores) and/or each thermal conductvty range...1 Measurements The number of samples "" for the test s determned accordng to the total number of lnes or producton factores "L" (as defned n the correspondng product standard), and the total number of dfferent thermal conductvty ranges of reference "P". The measured value of each sample s obtaned by applyng the procedures n Calculaton For the calculaton, thermal conductvty ref, s used for the thermal conductvty range for sample. Dependng on the bass selected by the manufacturer to calculate the declared thermal resstances, for each range, the conductvty ref, corresponds to: the thermal conductvty value declared by the manufacturer for ths range the conductvty value at fractle 90/90 for ths range, rounded to the nearest 0.1 mw/(m.k) For each sample, calculate: For the samples, calculate: 1 r, ref, 1 1 r r, and sr r, r 1 1 The parameter α s defned, gven n the followng table accordng to the number of samples : The product s then deemed complant f the followng nequalty s checked: r s 1 r 5

6 .3 Complance test for products for whch only the thermal resstance R can be certfed For a product for whch only the thermal resstance can be expressed (e.g. mult-layer product), the thermal complance test s performed for each thckness of the product..3.1 Measurements The number of samples "" for the test s determned accordng to the total number of lnes or producton factores "L". The thermal resstance value R of each sample (1 ) s obtaned from the arthmetcal mean of the measurements from m test specmens or pars of specmens (for measurement devces havng two), cut to the dmensons of the measurng devce, m beng dependant on the surface area S of the test specmens, such that: m = 1 S 0.5 m m = 0.06 m S < 0.5 m m = m S < 0.06 m The results are rounded to the nearest 0.01 m².k/w..3. Calculaton Usng R D to symbolse the declared thermal resstance for the thckness under consderaton, calculate for each sample : R r, R R D For the samples, calculate: R 1 r R r, 1 1 and sr Rr, Rr 1 1 The parameter α s defned, gven n the followng table accordng to the number of samples : The product s then deemed complant f the followng nequaton s checked: Rr s 1 r 6

7 .4 Complance test for bulk products for whch the thermal conductvty s modelled accordng to the densty For these products, the declared thermal conductvty value s establshed on the bass of a thermal conductvty curve accordng to the densty. The prncple of the complance test s to check the modellng curve a law of the followng type: C A B f defned based on In the case where the product s manufactured on several producton lnes, the complance test s only possble f the populaton spread s dentcal n each factory (product manufactured n several factores) and/or on each thckness range..4.1 Measurements The number of samples "" for the test s determned accordng to the total number of lnes "L". 6L for acceptance 1 L for follow-up In each case, an addtonal sample may be necessary for calculaton, and ths sample should be taken and the test specmens prepared at the same tme as the others. For each sample consttuted 1 and - Determne the densty 1 and of thermal conductvty specmens. - Measure the thermal conductvty mes 1 and λ mes..4. Calculaton f Based on the modellng curve, determne for each sample 1 and the thermal conductvty value mod 1 et mod correspondng to the densty 1 and : f and f mod 1 1 mod For each sample 1 and, determne the lmt B 1 et B : mes1 mod 1 B 1 and mod 1 B mes mod mod Then the lmt B of the sample: B B B 1 For the samples, determne the ndcator S: 7

8 S 1 mes1 mod 1 The product s deemed to be complant f: mod 1 1 mes mod mod the ndcator S 0.03 and f no value for the lmts B 0.06 or the ndcator S 0.03 and f a sngle value for the lmts B 0.06 but for the addtonal sample measured B The product s deemed to be non-complant f: the ndcator S 0.03 or f at least two values of the lmts B 0.06 or f a sngle value for the lmts B 0.06 but for the addtonal sample measured B