Now that I come to think of it, in the 1940s I drank IPA, India Pale
Ale. As I no longer drink beer, I had to look it up to see if it still
exists. http://en.wikipedia.org/wiki/India_Pale_Ale - it does.
Brian
Whittaker, Dewey (EHCOE) wrote:
> Several times, full of IPA (Intoxicating Pale Ales) I have found myself
> sitting in a Jacuzzi.
> Dewey
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Bev Christian
> Sent: Tuesday, June 30, 2009 8:59 AM
> To: [log in to unmask]
> Subject: Re: [TN] NTC [TN] IPA or Methanol in Ultrasonic Cleaner
>
> Well it is sort of like Friday for me, since tomorrow is Canada Day.
>
> Lee,
> I would never sit in a Jacuzzi full of IPA.
> Bev
>
> ----- Original Message -----
> From: TechNet <[log in to unmask]>
> To: [log in to unmask] <[log in to unmask]>
> Sent: Tue Jun 30 11:40:22 2009
> Subject: Re: [TN] IPA or Methanol in Ultrasonic Cleaner
>
> Since this is a global distribution, Brian's testimony reminds me of a
> visit my former manager made overseas. At the board shop, my manager
> witnessed a vapor degreaser being used, filled with IPA. While it worked
> fine in "cleaning" the hardware, with over 25 gallons of IPA near
> boiling, my manager left the premises rather quickly.
>
> BTW - the flash point of IPA is 12C. The flash point of methanol is 11C.
> With such a low flash point, I would be extremely careful about using
> either in an ultrasonic cleaner. With a Jet Clean (aka Jacuzzi), yes and
> I've done that. But with ultrasonics, I would be scared of putting too
> much energy into the tank, let alone the fumes that it would create.
>
> Along similar lines, at the Indy 500, there was a fire in the pits
> several years ago. Remember, the CART cars use methanol not gasoline as
> a fuel, which burns invisibly. They tried using water, but that made the
> situation worse until they used a fire extinguisher (type unknown but I
> think it was a halogen).
>
> Lee Whiteman, PMP
> Senior Member Engineering Staff
> L-3 Communications East
> Telephone: (856) 338-3508
> FAX: (856) 338-2906
> E-Mail: [log in to unmask]
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Brian Ellis
> Sent: Tuesday, June 30, 2009 11:12 AM
> To: [log in to unmask]
> Subject: Re: [TN] IPA o r Methanol in Ultrasonic Cleaner
>
> There has been at least one fire in a contamination tester that I know
> of for certain. The company in question thereafter decreed that all
> flammable solutions and products should be used only in metallic
> enclosures because the PVC melted, allowing the burning solution to
> spread along the floor, causing considerable collateral damage to the
> workshop (I think in millions). I have heard of a possible couple of
> other minor cases but nothing that I can quote chapter and verse on.
>
> Remember that the vapours from testers are the IPA/water azeotrope and
> not pure IPA. Even the small amount of water, not affecting the flash
> point, does reduce the ease with which it burns.
>
> As an ex-manufacturer of contamination testers, we took care in the
> design to minimise the risk, although it can never be eliminated. I
> emphasise that the one that caused all the damage was not of our
> manufacture! :-o
>
> By the same token, the bottle of Laphroaig in the CEO's cocktail cabinet
>
> has an EtOH/water azeotrope over the liquid level, but it has a better
> aroma and flavour than the contamination tester solution.
>
> Brian
>
> Richard Kraszewski wrote:
>> We have done US cleaning using higher molecular weight alcohols and
>> found them to be rather effective, especially in cleaning beneath low
>> stand off components.
>>
>> Using lower weight and lower boiling alcohols like MeOH, EtOH or IPA
>> just doesn't work well, so why even take the risk, albeit the risk is
>> rather low. Remember that ROSE tester solution (~75% IPA) can get
>> rather warm after awhile and I haven't heard about many (any?) fires
>> related to that testing operation.
>>
>>
>> Rich Kraszewski
>>
>>
>> -----Original Message-----
>> From: TechNet [mailto:[log in to unmask]] On Behalf Of John Anselmo
>> Sent: Monday, June 29, 2009 10:27 AM
>> To: [log in to unmask]
>> Subject: [TN] IPA o r Methanol in Ultrasonic Cleaner
>>
>> Technet,
>>
>> We are being asked by one of our customers to clean some parts
> (screws,
>> washers, standoffs, feedthrus) in an ultrasonic cleaner with either
>> Methanol or IPA (spectroscopic grade).
>> The time in the ultrasonics could be up to 1 hour.
>> Does anyone else have experience and recommendations for doing this?
>> My main concern is safety. What type of room or enclosure do we need
>> for this?
>>
>> Thanks,
>> John Anselmo
>>
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