TECHNET Archives

July 2009

TechNet@IPC.ORG

Options: Use Monospaced Font
Show Text Part by Default
Show All Mail Headers

Message: [<< First] [< Prev] [Next >] [Last >>]
Topic: [<< First] [< Prev] [Next >] [Last >>]
Author: [<< First] [< Prev] [Next >] [Last >>]

Print Reply
Subject:
From:
"Whittaker, Dewey (EHCOE)" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Whittaker, Dewey (EHCOE)
Date:
Mon, 6 Jul 2009 08:07:17 -0700
Content-Type:
text/plain
Parts/Attachments:
text/plain (200 lines)
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
> 
> ---------------------------------------------------
> Technet Mail List provided as a service by IPC using LISTSERV 15.0 To
> unsubscribe, send a message to [log in to unmask] with following text in
> the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt
or
> (re-start) delivery of Technet send e-mail to [log in to unmask]: SET
> Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the
> posts: send e-mail to [log in to unmask]: SET Technet Digest Search the
> archives of previous posts at: http://listserv.ipc.org/archives Please
> visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16
for
> additional information, or contact Keach Sasamori at [log in to unmask] or
> 847-615-7100 ext.2815
> -----------------------------------------------------
> 
> ---------------------------------------------------
> Technet Mail List provided as a service by IPC using LISTSERV 15.0
> To unsubscribe, send a message to [log in to unmask] with following text
in
> the BODY (NOT the subject field): SIGNOFF Technet
> To temporarily halt or (re-start) delivery of Technet send e-mail to
[log in to unmask]: SET Technet NOMAIL or (MAIL)
> To receive ONE mailing per day of all the posts: send e-mail to
[log in to unmask]: SET Technet Digest
> Search the archives of previous posts at:
http://listserv.ipc.org/archives
> Please visit IPC web site
http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100
ext.2815
> -----------------------------------------------------
> 

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0
To unsubscribe, send a message to [log in to unmask] with following text
in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to
[log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to
[log in to unmask]: SET Technet Digest
Search the archives of previous posts at:
http://listserv.ipc.org/archives
Please visit IPC web site
http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100
ext.2815
-----------------------------------------------------

---------------------------------------------------------------------
This transmission (including any attachments) may contain confidential
information, privileged material (including material protected by the
solicitor-client or other applicable privileges), or constitute
non-public information. Any use of this information by anyone other than
the intended recipient is prohibited. If you have received this
transmission in error, please immediately reply to the sender and delete
this information from your system. Use, dissemination, distribution, or
reproduction of this transmission by unintended recipients is not
authorized and may be unlawful.

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0
To unsubscribe, send a message to [log in to unmask] with following text
in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to
[log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to
[log in to unmask]: SET Technet Digest
Search the archives of previous posts at:
http://listserv.ipc.org/archives
Please visit IPC web site
http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100
ext.2815
-----------------------------------------------------

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------

ATOM RSS1 RSS2