Gentlemen – I am looking for any information regarding the Freeze Plug technology. We have been contracted to oversee 3 Freeze Plug installations, 1 – 30″ & 2 – 24″ on an existing offshore platform. I need information in relation to past experience & any related metallurgical problems which could occur (pipe, welds, etc.). material is Carbon steel & cooling medium is liquid N2. Next week we have meetings with both the contractor & an independent specialist – any other information would be of great help.