Water pipe installed above db

[PEG]

Any ceiling mounted pipework where it is unavoidable, that passes thru an electrical room or other restricted space will be run in a wall to wall PVC duct/pipe on most of the projects i've worked on. But 99% of the time they will be routed around such areas....

As for CO2/halon type discharge systems, i've seen them cause more damage and problems to the area they are protecting. Mainly from suspended ceiling mountings that are not up to the job of rigidity during the discharge. Anyone seen a 32mm steel pipe being thrown about like twig off a tree smashing everything in it's path?? Seen that on more than one occasion, thankfully all during the discharge testing of the system.

Yes,i have. I had cause to work on several of our largest mobile cranes,and these were fitted with Halon systems due to requirements of BNFL. They operated for only 5 seconds,and would destroy most of engine bay,but fire would be out...One of our tasks,before initiating any work in restricted position of engine bay,would be to isolate Halon system,as accidental deployment may mean curtains...you can't hold your breath,if you haven't got any irate:

 

[Engineer54]

Yes,i have. I had cause to work on several of our largest mobile cranes,and these were fitted with Halon systems due to requirements of BNFL. They operated for only 5 seconds,and would destroy most of engine bay,but fire would be out...One of our tasks,before initiating any work in restricted position of engine bay,would be to isolate Halon system,as accidental deployment may mean curtains...you can't hold your breath,if you haven't got any irate:

If all the discharge systems fitted to these large cranes did that much damage to them all i can say is that the systems were badly designed as well as the discharge pipe fixings. There is normally around a 45 to 60 second warning before a discharge takes place. All it takes to stop the physical damage is the discharge pipe being securely fixed to the frame of the cranes, and being as i would assume the frame being made up of substantially thick metal, there should be no reason for pipe fixings to rip themselves away from those fixings.