BS EN 13169:2009 pdf download – Thermal insulation products for buildings — Factory made products of expanded perlite (EPB) — Specification

BS EN 13169:2009 pdf download – Thermal insulation products for buildings — Factory made products of expanded perlite (EPB) — Specification 4 Requirements 4.1 General Product properties shall be assessed in accordance with clause 5. To comply with this standard, products shall meet the requirements of 4.2, and the requirements of 4.3 as appropriate. NOTE Information on additional properties is given in Annex E. One test result on a product property is the average of the measured values on the number of test specimens given in Table 6. 4.2 For all applications 4.2.1 Thermal resistance and thermal conductivity Thermal resistance and thermal conductivity shall be based upon measurements carried out in accordance with EN 12667 or EN 12939 for thick products. The thermal resistance and thermal conductivity shall be determined in accordance with Annex A and Annex C, and declared by the manufacturer according to the following: the reference mean temperature shall be 10 °C; the measured values shall be expressed with three significant figures; for products of uniform thickness, the thermal resistance, R D , shall always be declared. The thermal conductivity, λ D , shall be declared where possible. Where appropriate, for products of non-uniform thickness (e.g. for sloped and tapered products) only the thermal conductivity, λ D , shall be declared. the declared thermal resistance, R D , and thermal conductivity, λ D , shall be given as limit values representing at least 90 % of the production, determined with a confidence level of 90 %; the value of thermal conductivity, λ 90/90 , shall be rounded upwards to the nearest 0,001 W/(m⋅K) and declared as λ D in levels with steps of 0,001 W/(m⋅K);  the declared thermal resistance, R D , shall be calculated from the nominal thickness, d N , and the corresponding thermal conductivity, λ 90/90 ; the value of thermal resistance, R 90/90 , when calculated from the nominal thickness, d N , and the corresponding thermal conductivity, λ 90/90 , shall be rounded downwards to the nearest 0,05 m 2 ⋅K/W, and declared as R D in levels with steps of 0,05 m 2 ⋅K/W;  the value of R 90/90 , for those products for which only thermal resistance is measured directly, shall be rounded downwards to the nearest 0,05 m 2 K/W, and declared as R D in levels with steps of 0,05 m 2 ⋅K/W. 4.2.2 Length and...