Question for those who work with their hands...Re: Pipe Dope and Teflon Tape

yes, depending on what material they are applied to

Pipe dope and teflon do two things:

1) reduces friction and protects the threads as you tighten male pipe threads into a female pipe thread

2) helps seal the mechanical joint from leak

Pipe dope helps with the seal on pipe threads. Never cease doesn't seal. It is not meant for pipe threads. It helps keeping the nuts from ceasing up on the bolts making them easier to break loose. You only apply never cease on the side that you want to break loose. Teflon tape is also used on pipe threads.

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Pipe Dope and Teflon Tape

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Use one or the other. Not both.

Of course they help with the seal, that is what they are for. Use the thicker mill tape for gas connections.

It helps seal when its used on pipe (tapered) threads. It fills the imperfections on the surface of the thread face so that they can seal against each other. On joints where the threads are not the sealing surface (o ring boss, ORFS, JIC) it isnt doing anything.

You can tighted the piss out of it and the threads will deform enough to do it on their own, but its not the right way.

You’re speaking Greek to most of these betas on this board

teflon tape is only for smaller pipe, you need teflon dope

I’ve never successfully been able to get teflon tape to work.

Pipe sealant should only be used on tapered NPT threads, type AN threads require no sealant. theoretically a properly manufactured threaded joint can be considered liquid tight if it extends beyond 3 threads. Because of imperfections in the manufacturing process pipe sealants became popular to assure a leak free joint.

TPFE dope- Is a pipe sealant and is for joints that would be considered permanent.

TPFE tape- Is not a pipe sealant, it only provides lubrication of the threads, and is used on joints that will likely need to be dissembled at some point in the future.

Then there is the other issue of when to use White, Green, or Pink TPFE tape.