Tee or Stub

If I use a stub in place of a Tee, will it produce any effect on fluid flow or safety/integrity of pipe line?

Thank you JOP for your attention.

In fact I am not talking about any particular case. Actually on plant piping I always prefer Tees regardless pipe size and branch sizes because on plant there is always high pressure and high temperature.
But for piping design Out side battery limits of plant, I normally use Tees for small pipe sizes up to 2" dia because fabrication of stub is difficult for small pipes. But for larger diameter pipes I use stubs. Say from 4" dia pipe I will take connection of 2" by stub OR from 4" dia pipe I will take connection of 4" (same size). Temperature and pressure are not too much high out side the plant. Approx 110-150 Psi pressure & 60-80C temp.

So, that’s why some times I get confusion, either I should use Tee or Stub in these cases. Because, I have not found any literature about these things yet.

If you can guide me I will really appreciate you.

saqib ...In "general" you only do "stub-in" type branch connections on larger type piping ...say above 12" & on lower press/temp systems. This is a cost saving operation (same with mitered ell.s). But two issues stand out for me here; first doing a size on size stub-in (4" on a 4") is something you want to avoid! Cutting the coupon out WITHOUT getting into the wall of the main header is VERY tricky! The other issue is cost, paying a welder and his helper to cut, shape, bevel, & weld the sizes you have indicated (4") would cost more then if you went out and bought a 4" tee! Hence my suggestion to only consider this type of operation with larger piping. My $0.02 anyway, Good Luck! ...Mark

So I conclude that there is no hard and fast rule for using stubs. It will depend only on ones good engineering Practices (When & where it is suitable) and also up to some extent of Cost difference.

Thank you Mark for your guidence.