SOURCE TESTING ASSOCIATION I Annual Guide 2023
Understanding how standards numbers work
Figure 1 shows how standards are adopted in the UK and published by the British Standards Institute (BSI).
1. Should a standard be developed, for example in the UK by BSI it will be prefi xed by BS, e.g. BS 3841-1:1994 Determination of smoke emission from manufactured solid fuels for domestic use.
2. When a standard is developed and published by CEN, it is prefi xed with EN, and when introduced in the UK it will become a BS EN document, e.g. BS EN 1911:2010 Stationary source emissions – Determination of mass concentration of gaseous chlorides expressed as HCl and as stated above any confl icting standard must be removed. CEN or ISO can develop a standard under a joint agreement, and then CEN and ISO publish it with a prefi x EN ISO, and in the UK it then becomes a BS EN ISO prefi x, e.g. BS EN ISO 23210:2009 Stationary source emissions – Determination of PM10/ PM2.5 mass concentration in the fl ue gas. A national foreword is added to the standard to indicate its scope of applicability and to highlight any UK specifi c concerns.
Figure 1. Diagram of the world family of standards
3. When ISO develops a standard it is prefi xed ISO and should this be adopted in the UK it becomes BS ISO, e.g. BS ISO 25597:2015 Stationary source emissions – Test method for determining PM10/PM2.5 mass in stack gases using cyclone samplers and sample dilution.
Standards developed and published by CEN are generally accepted as being the most robust. However, other standards are still important, as there are substances that are not, as yet, covered by CEN Standards. The choice of the method is often dictated by the requirements of EU Directives, i.e. Industrial Emission Directive (IED), where, for example, the use of CEN standards is mandatory. If mandatory requirements do not dictate the standard, then monitoring standards should be used in the following order of priority as given in the European IPPC Bureau’s Reference Document (
http://eippcb.jrc.ec.europa.eu/) on the General Principles of Monitoring:
1. EN standards
2. ISO standards, other international standards, national standards 3. Validated laboratory-developed and non-standard methods
The intended application of the standard method must always be taken into account; for example, a CEN method may be less suitable than another less-rigorously validated standard method if the application is not one for which the CEN method was developed.
Products & Services for
Continuous Emissions to Air Monitoring
The standards bodies have various technical committees that are responsible for the development of the standards. For emission, to air, the CEN committee is CEN TC 264 and for ISO is ISO TC 146 SC1.
Further guidance and advice
www.cemsolutions.co.uk
The STA guides its members and their clients. This includes methodology advice, guidance on equipment selection and training. Visit the STA web site for details
www.s-t-a.org or any technical question contact
info@s-t-a.org or telephone +44(0) 1462 457535.
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