I was involved in a project a few years back where we used grooved flanges,
with non-metallic washers at the bolts. There was no continuous
metal-to-metal path and that was acceptable to the owner (defense
contractor). If your AHJ has a problem with the CPVC that may be an option
...
Christopher Born
Clark Nexsen
Norfolk, VA
----- Original Message -----
From: "Eric Tysinger" <[email protected]>
To: <[email protected]>
Sent: Thursday, November 04, 2010 2:18 PM
Subject: RE: NON-METALLIC COUPLING
I did a FBI building years back and I was lucky that the piping was only
2". We went back and forth to cpvc. The way they explained it to me was
that there is a way you can actually hook some kind of listening device to
the exterior steel riser and be able to hear conversations within the
building.
Thanks,
Eric Tysinger CET
NICET III - 108988
Designer
Wayne Automatic Fire Sprinklers, Inc.
4370 Motorsport Drive
Concord, NC 28027
p: (704)782-3032 x1751
f: (704)795-6838
C: (239)633-9703
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of George
Church
Sent: Thursday, November 04, 2010 2:12 PM
To: [email protected]; [email protected]
Subject: RE: NON-METALLIC COUPLING
Yup. At GE Aerospace in pre-CPVC days, I think we did a di-electric union
(or flanges) on either side of the wall.
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Travis
Mack, SET
Sent: Thursday, November 04, 2010 1:55 PM
To: [email protected]
Subject: Re: NON-METALLIC COUPLING
It is concrete wall. The detail on the contract drawings shows the
coupling at 6" inside of the secure area. I think what we have will serve
the purpose.
On 11/4/2010 10:53 AM, Brad Casterline wrote:
True, in my case they did, but if they just specified coupling on Travis'
job, maybe they know the break will avoid the entire system being one
huge antenna. Hopefully the wall is not metal stud!
-----Original Message-----
From: George Church [mailto:[email protected]]
Sent: Thursday, November 04, 2010 12:48 PM
To: [email protected]
Subject: RE: NON-METALLIC COUPLING
And it may be they need non-metallic the length of the wall thickness
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Brad
Casterline
Sent: Thursday, November 04, 2010 1:38 PM
To: [email protected]; [email protected]
Subject: RE: NON-METALLIC COUPLING
Good deal-- Ron F. idea of di-electric would probably work
physically-- stop the flow of electrons-- but they are not
'non-metallic'.
-----Original Message-----
From: Travis Mack, SET [mailto:[email protected]]
Sent: Thursday, November 04, 2010 12:32 PM
To: [email protected]
Subject: Re: NON-METALLIC COUPLING
I was able to calc it down with a short piece of 3" CPVC pipe. Then
just use the CPVC x Grooved adapters. Hopefully this will fly. It is
all light hazard.
On 11/4/2010 10:30 AM, Ron Greenman wrote:
3" max on CPVC.
On Thu, Nov 4, 2010 at 10:00 AM, Brad Casterline
<[email protected]> wrote:
Do you mean the room is some kind of secure communications? I did
one
recently- No metallic PENETRATION of the walls- (like an antenna) -
I
guess
a non metallic coupling would be like breaking the antenna- I went
steel
up
to the wall, steel to cpvc, cpvc through the wall, then back to
steel. Is
4"
cpvc made?
-----Original Message-----
From: Travis Mack, SET [mailto:[email protected]]
Sent: Thursday, November 04, 2010 11:07 AM
To: [email protected]
Subject: NON-METALLIC COUPLING
I am working on a military project. I have to provide a
non-metallic coupling on one side of wall. It is a penetration into
a
secured area.
Any ideas on what to use as a non-metallic coupling for 4" sch 40 pipe?
--
Please feel free to call if you have any questions or comments.
Sincerely,
Travis Mack, SET
MFP Design, LLC
2508 E Lodgepole Drive
Gilbert, AZ 85298
Office (480) 505-9271
Fax (866) 430-6107
_______________________________________________
Sprinklerforum mailing list
[email protected]
http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum
For Technical Assistance, send an email to:
[email protected]
To Unsubscribe, send an email
to:[email protected]
(Put the word unsubscribe in the subject field)
_______________________________________________
Sprinklerforum mailing list
[email protected]
http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum
For Technical Assistance, send an email to:
[email protected]
To Unsubscribe, send an email
to:[email protected]
(Put the word unsubscribe in the subject field)
_______________________________________________
Sprinklerforum mailing list
[email protected]
http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum
For Technical Assistance, send an email to: [email protected]
To Unsubscribe, send an email
to:[email protected]
(Put the word unsubscribe in the subject field)
_______________________________________________
Sprinklerforum mailing list
[email protected]
http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum
For Technical Assistance, send an email to: [email protected]
To Unsubscribe, send an email
to:[email protected]
(Put the word unsubscribe in the subject field)
_______________________________________________
Sprinklerforum mailing list
[email protected]
http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum
For Technical Assistance, send an email to: [email protected]
To Unsubscribe, send an email
to:[email protected]
(Put the word unsubscribe in the subject field)
_______________________________________________
Sprinklerforum mailing list
[email protected]
http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum
For Technical Assistance, send an email to: [email protected]
To Unsubscribe, send an email
to:[email protected]
(Put the word unsubscribe in the subject field)
_______________________________________________
Sprinklerforum mailing list
[email protected]
http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum
For Technical Assistance, send an email to: [email protected]
To Unsubscribe, send an email to:[email protected]
(Put the word unsubscribe in the subject field)
_______________________________________________
Sprinklerforum mailing list
[email protected]
http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum
For Technical Assistance, send an email to: [email protected]
To Unsubscribe, send an email to:[email protected]
(Put the word unsubscribe in the subject field)
_______________________________________________
Sprinklerforum mailing list
[email protected]
http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum
For Technical Assistance, send an email to: [email protected]
To Unsubscribe, send an email to:[email protected]
(Put the word unsubscribe in the subject field)
_______________________________________________
Sprinklerforum mailing list
[email protected]
http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum
For Technical Assistance, send an email to: [email protected]
To Unsubscribe, send an email to:[email protected]
(Put the word unsubscribe in the subject field)
