hi, if the vapor phase material is a fluorocarbon, i'd be very cautious. not in regard to an explosion, but in regard to very toxic gases that can form when fluorocarbons pyrolyze. from.- http://www.cdc.gov/mmwr/preview/mmwrhtml/00051631.htm 'As a cigarette is smoked, fluorocarbons are then burned or "pyrolyzed", and the products of decomposition are inhaled with the cigarette smoke. The actual products of decomposition may vary and are dependent on which polymers were used and at what temperature and humidity they were burned. The most common known products of pyrolysis include inorganic fluorides, hydrogen fluoride, carbonyl fluoride, and perfluoropropane.' phil -----Original Message----- From: TechNet [mailto:[log in to unmask]]On Behalf Of Jason Gregory Sent: Tuesday, April 19, 2005 10:49 AM To: [log in to unmask] Subject: [TN] Welding and Vapor Phase fluid Hello all, I need to grind and re-weld a bracket in my vapor phase machine and was wondering what precautions to take? There is a very thin residual amount of VP fluid at the bottom of the tank after draining. Any takers? Jason Gregory Manufacturing Engineer Innova Electronics (281)653-5593 (281)653-5594 fax (281)212-0844 cell [log in to unmask] --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e 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 1.8e 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 -----------------------------------------------------