BS EN 1857:2010 pdf download
BS EN 1857:2010 pdf download.Chimneys——Components ——Concrete flue liners.
8.7 Condensate resistance
When flue liners designated W (for use in wet operating conditions) are tested as desctibed in A.9 the maxwnum mass of test solution passing through the wall of the flue liner during any 24 h lest period shall not be greater than 0,5 gm-rn2 of the flue liner external surface.
8.8 Bulk density
When flue liners ere tested as described in AID each bulk density value shall be within a limit deviation of
± 10 % ol the manufacturer’s declared bulk density for the flue liner
8.9 Thermal resistance
Thermal resistance shall be measured in accordance with the method given in k5 or calculated in accordance with the method given in Annex C and its value declared by the manufacturer,
8.10 Freeze/thaw resistance
Where national regulations require freezeimaw resistance of flue liners, they shall be tested ri accordance with EN 14297. The product shall not present any damage of type 7, 8, 9 and 10 in accordance with EN 142972004. Table 1.
8.11 Flow resistance
8.11.1 Flow resistance of flue liners
The manufacturer shall declare the mean value of roughness for a flue liner determined either:
— by testing Ii accordance with EN 13216-1 (which is the reference test method); or
— from the data obtained in EN 13384-1 ;2002+A2:2008.
8.11.2 Flow resistance of fittings
The manufacturer shah declare the coefficient of flow resistance due to a directional and/or cross sectional and/or mass flow change which shall be determined in accordance with the method given in EN 1859 or obtained from the data in EN 13384-1 :2002+A2:2008
8.12 Dangerous substances
Materials used In products shall not release any dangerous substances in excess of the maximum permitted levels specified In a relevant European Standard for the material or permitted in the national regulations of the member state of destination.
9 Designation
9.1 Designations and classes
9.1.1 General
Designation classes for flue liners for temperature, pressure. resistance to sootfire, condensate resistance and corrosion resistance shall be in accordance with 9.1,2 to 9.1.6,
A.1 Measurement of dimensions
A.1.1 Transverse dimensions
The maximum and minimum internal transverse dimensions of the flue liner shall be those calculated from the manufacturers declared tolerances and the tolerances specified in 7.1 If direct measurement is to be carried out, two measurements should be taken at the observed maximum and minimum diameters,
The test also can be carfled out using two gauges whose diameters are set at the minimum and maximum diameters. The minimum gauge should be able to be turned through 360 within the whole length of the flue liner. The maximum gauge should not be able to enter the flue liner when turned through a rotation of 360g.
For square and rectangular flue liners, the internal transverse dwiiensiocis shall be measured between the mid points of opposite sides of the flue liner,
A.1.2 Declared height
The maximum and minimum declared heights of a flue liner shall be those calculated from the manufacturers declared dimensions and the tolerances specified in 7.1. If direct measurement Is to be carned out, two measurements should be taken at the observed maximum arid minimum internal heights.
The test can also be carried out by using two gauges whose heights are set at the minimum and maximum internal heights. The minimum gauge should not be able to fit over the internal height of the flue liner The maximum gauge should be able to fit over the internal height of the flue liner
A.1.3 Wall thickness
The maximum and minimum wall thickness dr’iensioris shall be those calculated from the manufacturers declared dimensions and the tolerances specified In 7.1 or direct measurement Is to be carned out at the observed maxwnum and minimum thickness.
A.2 Straightness test
A.2.1 Apparatus
A straightness measuring device, such as a straight edge, having a length 100 mm less than the nominal height of the flue liner under test.
A.2.2 Procedure
A.2.2.1 Place the measuring device along the line H1 as shown in Figure Al.
A,2.2.2 Measure the maximum distance from the centre of the straight line created by the apparatus in A.2.1 spanning any concave curve on the outside of the flue liner to the flue liner surface (D5) as shown in Figure A.1.
