Thank you for the answers. This isn't a safety issue as our dewars are outside. Even though the N2 is relatively inexpensive, the brass finally realized that even if you don't use the equipment you still lose about 2% of the nitrogen daily. So it's more of a cost issue. My answer was it would cost more over the long haul to design something to capture this than it would be for the actual amount of N2 lost. Basically, the powers that be don't want to be wasteful of the product and $$, so that's the reason behind the question. Craig -----Original Message----- From: TechNet [mailto:[log in to unmask]]On Behalf Of Mike Sewell Sent: Thursday, April 30, 2009 8:41 AM To: [log in to unmask] Subject: Re: [TN] Nitrogen use for selective soldering equipment While it is ~78% of the air you breath it can displace the oxygen in a room if you have a large enough leak acting as a simple asphyxiant - we had an O2 sensor and alarm in our HASS room (liquid N2 for cooling). Our selective solder equipment used an Onsite generator adjacent to the machine and was located in a 20K sq ft production area so we weren't concerned. Mike -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Hernefjord Ingemar Sent: Thursday, April 30, 2009 2:02 AM To: [log in to unmask] Subject: Re: [TN] Nitrogen use for selective soldering equipment That was a unique q. We use selective soldering daily. The small amount of Nitrogen will not change the global N2 percentage nor the local. Nitrogen is part of what you breathe, does not cause damage, is not poisonous. Why capture? I'm really curious. /Inge -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Craig Sullivan Sent: onsdag 29 april 2009 20:27 To: [log in to unmask] Subject: [TN] Nitrogen use for selective soldering equipment For those of you that use selective soldering equipment and nitrogen, are you capturing any of the Nitrogen that is purged on a daily basis? If so, can you share what you have done? --------------------------------------------------- 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 ----------------------------------------------------- --------------------------------------------------- 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 -----------------------------------------------------