BS EN 14314:2015 pdf download – Thermal insulation products for building equipment and industrial installations — Factory made phenolic foam (PF) products — 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 D.
One test result for a product property is the average of the measured values on the number of the test specimens given in Table 6.
4.2 For all applications
4.2.1 Thermal conductivity
For flat specimens, the thermal conductivity shall be based upon measurements carried out in accordance with EN 12667 or EN 12939 for thick products. For cylindrical specimens, EN ISO 8497 shall be used as specified in 5.3.2.
In both cases, the thermal conductivity values shall be determined by the manufacturer and verified in accordance with EN ISO 13787 and Annex B of this product standard. They shall be declared by the manufacturer according to the measuring standards mentioned above covering the product service temperature range. The following conditions apply:
— the measured values shall be expressed with three significant figures;
— the declared thermal conductivity curve shall be given as a limit curve, defined in EN ISO 13787;
— the value of the declared thermal conductivity, λ D , shall be rounded upwards to the nearest 0,001 W/(m·K);
— the lowest reference mean test temperature required is – 170 °C.
The declared equation/limit curve is the “declared reference” with three significant figures, that is to 0,000 1 W/(m·K) for λ values below 0,1 W/(m·K) and in 0,001 W/(m·K) for λ values above 0,1 W/(m·K). This shall be used as a reference for the verification of the declaration.
When thermal conductivity is declared as a table derived from the formula, rounding upwards to the next 0,001 W/(m·K) has to be done for the full range of the thermal conductivity.
NOTE Determinations of the declared thermal conductivity of pipe sections, following EN ISO 8497, having joints in the metering area, include the effects of these joints as defined in EN ISO 23993.
4.2.2 Dimensions and tolerances
4.2.2.1 Linear dimensions
The length, l, width, b, and thickness, d, of boards shall be determined in accordance with EN 822 and EN 823. The length, l, thickness, d, and inside diameter, D i , of pipe sections, segments and prefabricated ware shall be determined in accordance with EN 13467. No test result shall deviate from the declared value or class by more than the tolerances given in Tables 1 and 2.
Products with a surface facing or natural skin shall be tested without removing them.
NOTE Smaller tolerances may be declared by the manufacturer.
4.2.2.2 Squareness
Deviation from squareness, S b , of boards and slabs shall be determined in accordance with EN 824.
Deviation from squareness, v, of pipe shall be determined in accordance with EN 13467. For boards the deviation from squareness on length and width, S b , shall not exceed 10 mm/m and the deviation from squareness on thickness, S d , shall not exceed 2 mm. For pipe sections and segments the deviation from squareness, v, shall not exceed 3 mm.
Products with a surface facing or natural skin shall be tested without removing them.
4.2.2.3 Flatness
Deviation from flatness, S max , shall be determined in accordance with EN 825. The deviation from flatness, S max , shall not exceed 10 mm.
Products with a surface facing or natural skin shall be tested without removing them.
4.2.2.4 Pipe section linearity
Linearity, L, shall be determined in accordance with EN 13467. The deviation from linearity, L, shall not exceed 6 mm.
Products with a surface facing or natural skin shall be tested without removing them.
4.2.3 Dimensional stability
4.2.3.1 Dimensional stability under constant normal laboratory conditions
Dimensional stability under constant normal laboratory conditions (23 °C/50 % relative humidity) shall be determined in accordance with EN 1603. The relative changes in length, Δε l , and width, Δε b , shall not exceed ± 0,5 %. The overall change in flatness, Δ S , shall not exceed the values given in Table 3 for the corresponding nominal thicknesses, d N .BS EN 14314 pdf download.