BS EN 248-2002 pdf download.Sanitary tapware General specification for electrodeposited coatings of Ni-Cr.
This BS EN 248 specifies:
— the condition of the exposed surfaces of tapware;
— the characteristics (resistance to corrosion, adherence) of the surface coating;
— the tests for verifying these characteristics.
It applies to all sanitary fittings (supply or waste fittings) which have a metallic Ni-Cr coating, whatever the nature of
the substrate material.
2 Normative references
This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments).
EN ISO 10289:2001 Methods for corrosion testing of metallic and other inorganic coatings on metallic substrates – Rating of test specimens and manufactured articles subjected to corrosion tests (ISO 10289:1999)
ISO 9227, Corrosion tests in artificial atmospheres – Salt spray tests.
3 Terms and definitions
For the purposes of this European Standard, the following terms and definitions apply.
exposed surfaces
outside surfaces of tapware are the surfaces which are visible in use conditions
3.2
surfaces not considered as exposed surfaces:
a) internal surfaces of. for example operating members, caps, knobs, etc.;
b) parts usually or always hidden by another component, e.g. linkage of a waste outlet lining.
4 Exposed surfaces
4.3 Visual examination before tests
The exposed surfaces should be examined with the naked eye, from a distance of about 300 mm for approximately
10 s, without any magnifying device, in a light (diffused and not dazzling) of an intensity of 700 Lux to 1 000 Lux.
4.4 RequIrements
During examination, the exposed surfaces should not show any of the defects described in Table 1, with the exception of slight yellowish or bluish marls.
5 Quality of coating
5.1 Corrosion resistance test – test with neutral saline spray
5.1.1 General
The test described is a type test (laboratory test), and not a quality control test carried out during manufacture.
5.12 Method
Carry out the test under the conditions described in ISO 9227 specifically for the neutral saline-spray test, in the following way.
Subject the partially-dismantled tapware and its accessories to spraying for 200 h minimum, arranging a rest period of (48 * 1) h halfway through the treatment, ie after the first 100 h ± 1 h of spraying During the rest period, maintain the heat of the tank.
For the duration of the tests, the tank should only be opened to check and maintain the conditions, the maximum rest period in spraying being 30 mm per day. The heating should not be interrupted: samples under test should not be handled, washed or checked.
5.2.3 Visual examination after tests
The exposed surfaces shall be examined with the naked eye. from a distance of about 300 mm for approximately
10 s, without any magnifying device, in a light (diffused and not dazzling) of an intensity of 700 Lux to 1 000 Lux.
5.2.4 RequIrements
After testing, no cracks, blisters nor loosening of the coating shall be recorded. (The areas used for marking shall be excluded from the test requirements).BS EN 248-2002 pdf download.