[labnetwork] Corrosive exhaust material of construction

[Paolini, Steven]

Iulian
  Even though we are not insured by Factory Mutual, we tend to follow most of their guidelines in that the major portion of our corrosive exhaust is Teflon lined 316L stainless steel (PSP). This material has superior corrosion resistance while maintaining its structural integrity in the unfortunate event of a duct fire. The drawbacks are the price and the fact that it cannot be modified in the field.  Some plastic  (CPVC) can be used for final transitions but it must be approved by your insurer. Our system has been in use for 6 years and has no signs of breach or corrosion even when we remove a fitting for modifications. In the last industrial semi-manufacturer that I worked at, it had been in use for over 15 years and it was still in perfect condition.  I have become aware of other newer materials that might be less expensive than PSP but I have no experience with them. Insurance companies tend to dictate these choices and it might be a good idea to consult with them since they base their recommendations (requirements) on laboratory failure analysis.
I hope you have a good budget for this!

Steve Paolini 
  Equipment dood
Harvard University Center for Nanoscale Systems

-----Original Message-----
From: labnetwork-bounces at mtl.mit.edu [mailto:labnetwork-bounces at mtl.mit.edu] On Behalf Of Iulian Codreanu
Sent: Thursday, December 19, 2013 1:52 PM
To: Fab Network
Subject: [labnetwork] Corrosive exhaust material of construction

Dear Lab Network,

I, once again, seek your wisdom.  Could you please share with me the type of material used for your corrosive exhaust system, how long you had it in operation, if you had any problems with it, and what you would do differently of you were in a position to do so?

Thank you very much for your help.

Iulian

--
iulian Codreanu, Ph.D.
Director of Operations, UD NanoFab
University of Delaware
149 Evans Hall
Newark, DE 19716
302-831-2784


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