I have a liquid nitrogen dewar (big container) that part of the lid fell into. I tried draining it outside but it still has vapor escaping when I open it and is very cold..so I cant get the lid out still. Is it safe to leave open inside so it gets warm enough that I can stick my hand into it to get the lid out? How long will this take? (the container is probably 2 1/2-3 ft tall and Im pretty sure its insulated.
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I'm not sure I totally understand your description If u are going to put a piece of pipe into a hole that has cement and the open end of the pipe is open, then it will fill as u push it in If u r going to place a piece of pipe with fittings on it into concrete i would have to say that the chances of cement entering the joints is very small.. Consider wrapping the pipe fitting area with duck tape so the cement wont have contact what so ever around the pipe.. This method is often used for gas pipes that run through concrete all though the tape is much thicker so as to allow a buffer if the concrete happened to move a bit, thus saving the pipe from a leak. U could also use a bit of plastic wrap around the fitting joint or even some plumbers dope or wax to make sure nothing enters Personally I think i would just wrap a piece of tape around it since it only needs to block out the concrete while it dries for those brief moments If this doesn't help then update your question with a bit more info on the specifics of your project Good luck!
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