BS 7722-2010 pdf free download

BS 7722-2010 pdf free download.Surface covered PVC-U profiles for windows and doorsets Specification.
6.2.1 General
The sight surfaces of surface covered profiles shall be uniform and free from defects such as foreign bodies, cracks, sink marks, die lines, ripples, bulges, scratches or other surface defects when viewed by normal or corrected vision at a range of 1 m in 450 north sky light. viewing perpendicular to the surface as described in BS EN ISO 105-AOl.
Where the colour of a profile is specified, it shall be specified in terms of the foil manufacturer’s reference or its CIE LAB 1*, a’, b’ values in accordance with B5 3900-D9,
6.2.2 Single colour profiles
The total colour difference (IE’). measured in accordance with BS 3900-D8, BS 3900-D9, and BS 3900-D10, between any profile and the manufacturer’s stated reference colour shall not exceed the manufacturer’s declared value.
NOTE 1 For instrumental colour measurement the use of spectrophotometers is preferred. Tn-stimulus colorimeters should only be used for white or near-white colours. The measurement procedure should be chosen accordingly.
NOTE 2 tIE’ = 1 from a reference colour equates to a potential colour difference E’ =2 between two components which might be visible to the naked eye.
6.2.3 Non-uniform colour and texture profiles Reference samples of non-uniform colour and texture surface covered profiles shall be maintained, demonstrating the extremes of permissible variation for comparison of the consistency of colour and appearance.
Applied texture surfaces shall have the pattern applied uniformly. Each textured surface shall match the reference sample when viewed by normal or corrected vision at a range of 1 m in 450 north sky light, viewing perpendicular to the surface as described in BS EN ISO 105-Aol.
Each colour and any pattern shall match the reference sample when similarly viewed.
6.2.4 Manufacturing tolerances
Tolerances on dimensions shall be in accordance with
BS EN 12608:2003, 5.3.
6.3 Heat ageing
When tested in accordance with BS EN 12608:2003, 5.7, surface covered profiles shall have no bubbles within the foil of more than 1 mm in diameter, and no cracks, surface irregularities or delamination.
NOTE 1 There is no requirement for the flexible element of rigid/flexible co-extrusions.
NOTE 2 An increase in gloss does not constitute failure
6.4 Weldability
When tested in accordance with the method given in
85 EN 12608:2003, 5.9, the mean weld failure stress shall be not less than 25 MPa and no individual result shall fall below 20 MPa.
NOTE The second moment of area is calculated using profile dimensions prior to foiling.
6.5 Heat reversion
When tested in accordance with 85 EN 479, the heat reversion of the two largest opposing sight surfaces of the main profiles shall be not greater than 2%, and the heat reversion of auxiliary profiles shall be not greater than 3%.
Where both sight surfaces are covered, the difference in heat reversion between these surfaces shall be not greater than 0.4%.
NOTE For glazing beads which are to be used externally, a limit of 2% of the heat reversion is recommended.
6.6 Impact resistance at low temperature
Main profiles shall be tested in accordance with BS EN 12608:2003, 5.6 but with an impactor of mass 0.5 kg and a drop height of 750 mm. NOTE This mass and drop height are specified in line with UEAtc MOAT 57(11, which has been used successfully in Europe for many years. No sample shall exhibit cracking through the entire wall thickness of the profile. No more than one test piece shall fail.
Ten samples per sight surface of profiles designed to be exposed externally shall be tested. Ten samples per sub-sill profile shall be tested on the upper sight surface and no more than one test piece shall fail.BS 7722-2010 pdf free download.