The most commonly used steel pipe for sprinkler systems is black steel pipe. Copper tubing is another piping material listed for sprinklers in NFPA 13. Also, plastic pipe (namely, CPVC and PEX tubing) is permitted for certain types of sprinkler systems.
What is a dry pipe sprinkler system?
A dry pipe sprinkler system is one in which pipes are filled with pressurized air or nitrogen, rather than water. … Located in a heated space, the dry-pipe valve prevents water from entering the pipe until a fire causes one or more sprinklers to operate. Once this happens, the air escapes and the dry pipe valve releases.
Can you use 1/2 inch sprinkler pipe?
Using 1/2″ pipe means you have to have another size of spare pipe and fittings on hand for repairs. But the biggest reason is that 1/2″ pipe leaves no flexibility for future changes or additions to your sprinkler system. If you ever need to add another sprinkler to the pipe you’re screwed.
Can anything be touching sprinkler pipe?
“The Joint Commission and CMS have zero tolerance that prohibits anything being supported by the sprinkler piping system, including incidental contact,” the commission notes.
How long does PVC sprinkler pipe last?
PVC (Polyvinyl Chloride): Traditionally, PVC piping only lasts between 25-40 years. However, with recent technological advancements, PVC pipes may be able to last 70 years or more.
Is PVC pipe flame retardant?
PVC is inherently a self-extinguishing fire retardant material due to the abundance of chlorine in its formulation, with burning characteristics closer to that of paper, wood and straw. … These materials have a very high risk of igniting and will maintain the fire.
Why is fire sprinkler water black?
By far the most common corrosion reaction found in fire sprinkler systems is oxidation. Oxygen trapped inside the system dissolves into water and reacts with the internal surface of the black or galvanized steel piping.