Our facility is considering changing from stored liquid nitrogen at 99.9999%
purity to onsite generated at 99.5% purity (5000ppm impure).  Our reflow
manufacturer recommends a maximum of 180ppm oxygen in the nitrogen
environment.   What problems could occur if the 180ppm level is breached?
What maximum impurity levels have been observed without any adverse effects?

Thanks in advance for your inputs.

Steve Shoda
BAE SYSTEMS Controls
Fort Wayne, IN

---------------------------------------------------------------------------------
Technet Mail List provided as a free service by IPC using LISTSERV 1.8d
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 delivery of Technet send the following message: SET Technet NOMAIL
Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives
Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315
---------------------------------------------------------------------------------