An answer which is inexpensive than tantalum for repairing glass around nozzles is the use of a repair sleeve fabricated from PTFE. On this approach, titanium putty could possibly be used to fill the broken space. Then, a layer of cement is additional, and the PTFE sleeve is set up https://troyhfcxs.westexwiki.com/860700/the_basic_principles_of_glass_lined_reactor_maintenance