[dsg-hallb_rich] [EXTERNAL] Re: Cannot use nitrogen in aerogel tents if people will work inside tents

[Marco Contalbrigo]

Hi Tyler,
thank you for the nice reminder. As you might
image, we are aware of the issue.

Air will be used to dry the tend while
assembling the aerogel.

When each panel is done, will be wrapped with
a platic envelope and nitrogen will be
eventually used to purge the envelope awaiting
for the mirrors.

This can be done outside the tend.

Bests, Marco.

On Tue, 17 May 2022, Tyler Lemon wrote:

> Hello again,
> 
> I talked to Marc and he reminded me that we cannot use nitrogen in the
> aerogel tents.
> 
> The tents were approved for use with dry air purge only.
> 
> -Tyler
> 
> ____________________________________________________________________________
> From: dsg-hallb_rich <dsg-hallb_rich-bounces at jlab.org> on behalf of Tyler
> Lemon <tlemon at jlab.org>
> Sent: Tuesday, May 17, 2022 10:17 AM
> To: dsg-hallb_rich at jlab.org <dsg-hallb_rich at jlab.org>
> Subject: [dsg-hallb_rich] Cannot use nitrogen in aerogel tents if people
> will work inside tents  
> Hi Marco M, Marco C, Sandro, and Dario,
> 
> I noticed today that there's now a nitrogen supply line running from the
> manifold near the window of the cleanroom back to the corner where the
> aerogel tents are.
> 
> I do see that that line is not connected to the manifold, but if people will
> be working inside the tents, nitrogen cannot be used to purge the tents as
> it creates an Oxygen Deficiency Hazard (ODH) situation inside the tent.
> 
> If it needs to be more dry inside the tents, we will have to come up with a
> safer way to proceed.
> 
> -Tyler
> 
> 
> 
>