hydraulic calculations silde ruleBefore the scientific calculators and computers, we still produced hydraulic calculations for High Hazard sprinkler systems but this was a long-winded and time-consuming process and prone to error. I say High Hazard sprinkler systems as these were the only systems you would consider producing hydraulic calculations for as the production of the calculations by hand took so long that we were content in using pre-calculated pipe table for Light hazard and Ordinary hazard sprinkler systems and no one had ever thought of installing sprinklers into a house or care facility.

Even with a scientific calculator you still have a lot of buttons which need to be press to solve the Hayes William pressure loss formula, after all, each time we need to enter the pipe diameter, the flow rate and the C factor of the pipe. Of course, we can simplify the Hayes and William pressure loss formula for any pipe by producing a k-factor for each pipe size and pipe type, this certainly simplifies the input when using a calculate but we then need to look it up in a table so it is still quite laborious. If this was not enough we have not even considered the K-Factor formula for working out the flow through the sprinkler head or balancing the junction points at each tee or cross which needed yet another adjustment calculation. As an aside who thought it was a good idea to have “K” and “k” as two different formulas in fire sprinkler calculations, did someone not think that this may be confusing!

Fortunately, we had an answer the hydraulic calculator slide rule and no self-respecting sprinkler engineer would be without one. I seem to remember there were not that easy to get hold of. Some of the larger sprinkler companies produce their own such as Matter and Platt and others like the one shown was produced by an insurance company for their own fire sprinkler inspection engineers.

Philosophy to fire sprinklersHow can you get from fire sprinklers to philosophy well apparently you can in 23 steps, all you need to do is to type fire sprinklers into Wikipedia and then click on the first link which appears in each article and continue doing this until you get to philosophy. 

Yarnfield park webI was delighted to meet 11 students this week on our last FHC training course at Yarnfield Park. I am always delighted to be able to show old hands who have been using our software for many years to new tricks and shortcuts which they have not tried or discovered. On the other hand we had a number of students just started using to use the FHC software and hopefully we have a equipped them with skills which they will need to complete their own projects. 




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.

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.

CEN have published the draft standard pr EN 16925 fixed firefighting systems – automatic residential sprinkler systems – design, installation and maintenance it’s a long title and a long document at around 70 pages.  The standard covers residential and domestic dwellings from a house, blocks of flats, student accommodation and care homes it also covers small hotels which are up to 4 stories in height.  Is not appear to be any other limit the size of the building so standard can be useful flats to any height even though they only require a single water supply.

I have been delighted to see so many fires have been stopped by sprinkler installations in domestic and residential premises this clearly shows how effective they have been in saving both life and property.

In a recent incident an elderly gentleman whilst in his flat 4pm had his life saved by recently installed fire sprinkler installation in his flat.  Whilst he was asleep in his bedroom a fire started in his kitchen originating from a toaster despite developed quite quickly and the sprinklers activated and extinguished the fire whilst also raising the alarm which allowed the gentleman to be evacuated from his flat.

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.