Steve and Rich,

Irrespective of what the law or code states, we must ask what is reasonable and prudent. It does seem reasonable to put them on the AA, especially since the cost is inexpensive. And if you're going to put them on one flammable gas, you might as well put them on all. The cost is minor and it is a good exercise in safety, and evaluate the piping system. At a time when safety buy-in is meager at best, and in need of a paradigm shift, safety professionals must stand of the side of reasonable and prudent, and then consider Ňare we in complianceÓ. Nothing wrong with exceeding the requirements of the code. You will never measure the incidents that are prevented, but they will always measure the incidents that occur on your watch.

Consequently, what concentration of hydrogen are you using on your GC?

James

From: ACS Division of Chemical Health and Safety <DCHAS-L@PRINCETON.EDU> On Behalf Of Richard Palluzi
Sent: Tuesday, November 19, 2019 5:45 AM
To: DCHAS-L@PRINCETON.EDU
Subject: Re: [DCHAS-L] Flashback prevention

These are only mandatory on welding cylinders. They are designed to protect against a flashback if the hoses fail

Sent from my Verizon Wireless 4G LTE Droid

On Nov 18, 2019 4:59 PM, Steven Smith <e32srs@MUN.CA> wrote:

Hi All,

One of the instrumentation labs I work in recently had a report suggesting that both the hydrogen and acetylene tanks be equipped with flashback adapters. These are for tanks used for a GC and a Flame AA. The manufacturer, however, suggests that these regulators aren't necessary. I was wondering if anyone on this listserv could comment on whether they use flashback adapters for tanks attached to GC's and FAA instruments.

Thanks,

Steve

Dept of Chemistry

Memorial University

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