EN 12845 : 2015 Automatic Sprinkler Systems

or to give it its full title EN 12845:2015 Fixed firefighting systems - Automatic sprinkler systems -  Design, installation and maintenance  

EN 12845 automatic sprinkler systems

We have just received our copy of EN 12845 I'm sure in the coming months we will write some observations. The revised standard is an extremely long document with over 200 pages but something which is worth noting is that it states that this standard suppresses EN 12845:2004:A2:2009 which will be withdrawn on 31 December, 2015, so we don't have long to get used just its contents.

For company's in United Kingdom the situation is somewhat worse as it draws your attention to the LPC rules for automatic sprinkler installations which incorporates the provisions of BS EN 12845 as far as I'm aware no one has yet received a copy of this standard.

We will keep this page updated as we find out more information.


BS 9251 - An introduction to the standard

We were delighted to be able to present a webinar to our customers which introduced the new BS 9251 : 2014 fire sprinkler systems for domestic and residential occupancies – code of practice which over hundred people participated, we thought we would like to share our thoughts with a wide audience.

The new standard has considerable differences to the 2005 publication and is showing its maturity in the changes which makes this standard highly usable and provieds both flexibility and guidance on its use and implementation.

Read more: BS 9251 - An introduction to the standard

Microsoft windows 10 and FHC

Windows 10 and FHC softwareWe have just received our first full version of Microsoft Windows 10 which unlike some other Microsoft upgrades went seamlessly although you do have to allow over an hour for the full install.  We are pleased to say that our FHC (hydraulic calculation software) and Hcalc (hydraulic calculator) performs seamlessly on this new operating system.  We had previously tested our software on the Windows 10 technical preview before the launch date so we were confident that this would be the case but it's reassuring to have it successfully working on the production release.

Our first impressions is that Windows 10 is a great improvement on Windows 8 and 8.1 and looks to have resolved many of the issues but still retaining the stability and usability of Windows 7.  However we would recommend our customers to wait a month or two before deploying Windows 10 to allow others to iron out any niggles which there may be. I recently attended a seminar hosted by Microsoft regarding Windows 10 and was surprised to hear that a number of the new features have not been included in this release but will be rolled out over the coming months.  We got the impression that 'consumer' customers are being used to test drive the operating system before it is rolled out to the enterprise users.

Hydraulic calculations for water mist systems

Water mist systems are becoming increasingly more popular as an alternative to traditional fire sprinkler systems but like any new technology we need to carefully understand its benefits and limitations and this is also true when we look at hydraulic calculations for such systems.

The best guidance for hydraulic calculations for use with low, intermediate and high pressure systems can be found in NFPA 750 which provides detailed guidance on velocity limitations, use of additives and the pressure loss formula which must be used. For many systems the traditional Hazen Williams pressure loss formula will not be adequate and should be changed to the more reliable Darcy Weisbach.

You have always been able to switch between these two pressure loss formulas in FHC but with the increased use of water mist systems and the complexities of knowing which pressure loss formula to use, Canute has updated its technical data sheet TDS #1 'Using FHC for water mist calculations'. This document explains NFPA 750 methodology for water mist hydraulic calculations and which pressure loss formula is suitable for the various types of system. It also shows how you can use this information within FHC software to your best advantage.

Authorised resellers for FHC

Canute are please to announce that it has appointed resellers for China, Hong Kong, Singapore and the United Emirates. This demonstrates Canute's long-standing commitment to providing quality hydraulic calculation software for the fire protection industry throughout the world.

The list of resellers can be found on our website Authorised Resellers

BS 9251 code of practice is now out for public comment

After a year's work BSI has now issued BS 9251(fire sprinkler systems for domestic and residential occupancies – code of practice) for public comment. The Revised standard is considerably changed from the 2005 version and provides more clarification and insight. One of the major changes is that it has removed 'residential' and 'domestic' classifications in favour of type 1, type 2 and type 3 classifications this is undoubtedly a move in the right direction and will be give much more flexibility.


Read more: BS 9251 code of practice is now out for public comment