Ferrous sprinkler material and hospital MRI rooms 2

[SprinklerDesigner2]

For all the hospital additions I've laid out this is the my first MRI room.

Everywhere I've looked the material can not be ferrous. Good enough.

Heads are brass. Pipe can be copper or CPVC, appears I will have to order special escutcheons but what about hangers, specifically rod, attachment and rings?

I do have specs but nothing on sprinklers. It's just a build out in an existing shell space.

Anyone else have experience with this?

 

[ryano669]

We typically use stainless rod and hangers in MRI enclosures. The attachments vary based on the structure. Sammy screw makes a stainless fastener for wood or metal. We also have used brass ceiling flanges with brass/stainless screws to attach to structure. Is the piping located inside the enclosure? I have seen applications where they provide a wave guide in the wall for all penetrations, and other times we penetrate the copper lining with 1 copper pipe (for one head applications). The shell is then soldered around our drop.

 

[MGXFP]

Don't forget when using hanger rings to get the felt-lined rings if copper pipe is used.

The lining is to prevent electrolysis.

 

[DRWeig]

Good on ya, Ryan and Newton.

Stainless does the trick, and electrolysis is a problem...

Goober Dave

 

[rconner]

Not claiming to be any expert here, but depending on criticality of what your're talking about one may need to be a little more specific or careful with terminology used (see e.g.

http://wiki.answers.com/Q/Is_stainless_steel_a_ferrous_metal).

Are you sure they didn't intend to say "non-magnetic"?

 

[chevy4x4trucks]

Be careful on your sprinkler head as well. In most applications you need to use a special "MRI" sprinkler head like this one from viking:

http://www.vikinggroupinc.com/databook/sprinklers/mrisprinkler/062908.pdf

These are also a bit more pricey than your standard heads, about $100 each.

 

[SprinklerDesigner2]

rconnor and chevy,

Great help, thank you both for the heads up.

 

[SprinklerDesigner2]

Not claiming to be any expert here, but depending on criticality of what your're talking about one may need to be a little more specific or careful with terminology used (see e.g.

http://wiki.answers.com/Q/Is_stainless_steel_a_ferrous_metal).

Are you sure they didn't intend to say "non-magnetic"?

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Seems safest if I go with copper.