Millions of pounds of machined parts designed for critical requirements are cleaned daily with safe aqueous based solutions. I am still amazed that customers dictate stone age cleaning methods with hazardous (flammable) solvents and thinks this will suffice for a clean substrate. There is still some education to do. My job is safe until retirement for sure! John, bottom line, without an IPA designed/ready vapor degreaser already on your floor you risk a serious fire liability. Any open top ultrasonic unit will only generate heat and likely ignite after 1-hour. The only saving grace is that it will evaporate before auto ignition. Call or email me off-line if you wish to discuss this further. Charlie Pitarys 615-983-4523 ________________________________ CONFIDENTIAL The content of this message, including any attachments, may contain privileged and/or confidential information proprietary to Kyzen and is intended only for the named addressees. If you are not the intended recipient, you may not disseminate, distribute or copy this email. Please notify the sender immediately by email if you have received this email in error and delete this email from your system. -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of John Anselmo Sent: Monday, June 29, 2009 12:17 PM To: [log in to unmask] Subject: Re: [TN] IPA o r Methanol in Ultrasonic Cleaner Hi Bev, To answer your questions: Approximately half a dozen of each (screws/washers/ etc. The qty is for each assembly and they only need to be cleaned before final assembly, so it will be an ongoing process. We are trying to clean any contaminants (oils) on the machined parts. I haven't researched what finish will be on the screws yet. John -----Original Message----- From: Bev Christian [mailto:[log in to unmask]] Sent: Monday, June 29, 2009 9:34 AM To: TechNet E-Mail Forum; John Anselmo Subject: RE: [TN] IPA o r Methanol in Ultrasonic Cleaner John, Well part of this (safety considerations) will vary from jurisdiction to jurisdiction. Second, How many screws and how often? Is this once off or will it be repeating? Third What is it you are tying to clean off? Fourth Are the screws painted, chromated, etc.? Bev RIM -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of John Anselmo Sent: Monday, June 29, 2009 11:27 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? 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