[labnetwork] MAU Steam Coil

[Paolini, Steven]

Mark,
  You are not an outlier!
Here at Hahvid, we had to replace all of our leaky steam coils in the first year that our facility opened. The root cause was dissimilar metals on the connections (brass to black iron, stainless to black iron etc.) The original pipefitters apparently were not familiar with galvanic coupling that is accelerated by steam.  Since we have correctly piped them, we have had no issues for the past 14 issues.
  Equipment Dood

Steve Paolini
Principal Equipment Engineer
Harvard University Center for Nanoscale Systems
11 Oxford St.
Cambridge, MA 02138
617- 496- 9816
spaolini at cns.fas.harvard.edu
www.cns.fas.harvard.edu

-----Original Message-----
From: labnetwork <labnetwork-bounces at mtl.mit.edu> On Behalf Of Mark Weiler
Sent: Wednesday, January 04, 2023 1:30 PM
To: labnetwork at mtl.mit.edu
Subject: [labnetwork] MAU Steam Coil

Hello Everyone…

I am writing to ask whether any of you have ever had to replace a steam coil of the Make-up Air Units (MAU’s) of your cleanrooms, and what you, your facilities team, or the product vendor did to solve the problem.  Are there any cost-effective solutions with minimal downtime?  We have completed three repairs of our coil since starting here in 2016…(replacing likely requires a Cleanroom shutdown and the construction of a bypass), and currently have another leak.

I’m really interested to know if this has happened anywhere else… are we an outlier?

Best regards,

Mark



Mark Weiler
Manager, Equipment & Facilities
Bertucci Nanotechnology Laboratory
Eden Hall Nanofabrication Cleanroom
Carnegie Mellon University
P:	412-268-2471
F:	412-268-3497
http://www.nanofab.ece.cmu.edu





_______________________________________________
labnetwork mailing list
labnetwork at mtl.mit.edu
https://mtl.mit.edu/mailman/listinfo.cgi/labnetwork