From:
Pierre Chantal <Pierre.Chantal**At_Symbol_Here**HC-SC.GC.CA>
Subject:
Re: Formaldehyde filtration
Date:
Apr 30, 2010 14:02 UTC
Reply-To:
DCHAS-L Discussion List
In-Reply-To:
<F3558EC01B504A4C88E5400C2DC5C2D7**At_Symbol_Here**bruekbergterm1>
Date: Fri, 30 Apr 2010 10:00:49 -0400
Reply-To: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**LIST.UVM.EDU>
Sender: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**LIST.UVM.EDU>
From: Pierre Chantal <Pierre.Chantal**At_Symbol_Here**HC-SC.GC.CA>
Subject: Re: Gas Regulator Question
In-Reply-To: <F3558EC01B504A4C88E5400C2DC5C2D7**At_Symbol_Here**bruekbergterm1>
Hi,
This is the how I have been told to proceed when opening a gas tank...
some 35 years ago. This practice can have been associated with the
construction design of the old gas regulator where a few explosion of the
gauges were reported. The design of the gauges used for gas regulator has
changed over time and you can see a safety devices on the back of most
(not all) new gauges were a metallic flap is screwed on the back of the
gauge to allow any pressure build-up to be release away from the face of
the operator.
I never been the witness of any such explosion but I am still avert my
face away from the regulator gauge when I have to open one....
Pierre
Ben Ruekberg
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2010-04-30 09:19 AM
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Subject
[DCHAS-L] Gas Regulator Question
Long ago, when I was taking welding lessons, the instructor
taught us to avert our faces from the regulator gauges when opening a gas
tank because of a possible defect in the regulator that would pressurize
the gauge and explode the glass.
Since that time, I have read several books on laboratory
practices and do not recall any of them alluding to the practice of
averting one’s face when opening a gas cylinder. Should they?
With all the accumulated experience in this group, has anyone heard of
this practice or hazard?
(Note: My old instructor might have been confusing a defective
regulator hazard with the one resulting from using a contaminated
regulator with an oxygen cylinder.)
Thank you very much,
Ben
