Not necessarily a better alternative going black painted. Had a job where we
used sch. 10 roll grooved 4'' as opposed to screwed. The sch. ten had a CRR of
7; corrosion resistance ration, expected to last 7 times longer. Threads are
the week point with either pipe. Galvanizing is compromised by threading also
but Sch. 10 would be roll grooved, correct?
> Date: Wed, 19 Sep 2012 12:14:49 -0400
> To: [email protected]
> From: [email protected]
> Subject: Re: black sch 40 painted vs galv schedule 10
>
> Galvanizing is a chemical bonding whereas painting is a coating. Painting may
> need to be repainted over time. Since it is in a wet environment, getting a
> paint to set up properly with proper coating might be an issue. However, a
> couple of coats of a two-part epoxy might not be a bad alternative, but again
> cold be tough to do in that environment.
>
>
> At 12:01 PM 9/19/2012, you wrote:
> >We have an UG tunnel with an existing 8" bulk main that is showing signs of
> >significant corrosion - currently black pipe - unpainted.
> >
> >We recommended replacing the pipe with galv sch 10 - a competitor has
> >recommended using blk shc 40 and painting it as being a better choice for
> >corrosion protection. We disagree but would like some other input?
> >
> >The tunnel does have standing water on the floor most of the time so it is
> >always damp.
> >
> >Thanks,
> >Greg
> >
> >--
> >Greg McGahan
> >Living Water Fire Protection, LLC <http://www.livingwaterfp.com>
> >1160 McKenzie Road
> >Cantonment, FL 32533
> >850-937-1850
> >fax 850-937-1852
> >-------------- next part --------------
> >An HTML attachment was scrubbed...
> >URL:
> ><http://fireball.firesprinkler.org/mailman/private/sprinklerforum/attachments/20120919/e51f2e06/attachment.html>
> >_______________________________________________
> >Sprinklerforum mailing list
> >[email protected]
> >http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum
>
> Todd G. Williams, PE
> Fire Protection Design/Consulting
> Stonington, CT
> 860.535.2080
> www.fpdc.com
>
> _______________________________________________
> Sprinklerforum mailing list
> [email protected]
> http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://fireball.firesprinkler.org/mailman/private/sprinklerforum/attachments/20120919/ef024101/attachment.html>
_______________________________________________
Sprinklerforum mailing list
[email protected]
http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum
