NFPA 750
NFPA 750
(OP)
I need to know about tools and equipment for high pressure piping in water mist systems.
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RE: NFPA 750
1. Low pressure system – conventional watersprinkler system.
Working-pressure below 10 bars. A certain type, called Mist Waterspray System, can be identified in this group.
This type of systems has at least 70-80 % water consumption compared to the conventional watersprinkler system.
2. Medium pressure system – mist waterspray system or watermist system.
The pressure range is from 10 up to 40 bars. The water consumption is at least
50-70 % of the conventional watersprinkler system.
3. Highpressure system – watermist or waterfog system.
The pressure range is working from 40 bars up to 100/150/200 bars.
The difference between mist and fog is the size of the droplets.
Fog has in average smaller droplets than mist.
A highpressure waterfog system has advantages over the low- and medium pressure systems
Total weight and the amount of water is reduced to a minimum.
Cooling effect is extreme high.
The grade of heat expansion.
Sizes of drain and scupper system is reduced to a minimum.
Dimension of pipes is small.
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RE: NFPA 750
SS pipe bending of smalled sizes by hand benders, larger sizes by hydraulic bender that doesn't collaspse tube (that mean mandrel bender not shoe and roller type)
Hope this helps.
Ken
RE: NFPA 750