NPT thread strength - Stress Distribution / Tensile Area 1

[Bruno730]

Hi all

Having a debate with a few friends (some engineers and some non-engineers, but mechanically inclined). For an NPT threaded pipe connection under a tensile load, is the load applied to:

> ONLY the last engaged external thread;
> Distributed evenly across all engaged threads, or;
> Highest at the last engaged thread and then decrease with increasing distance from the end of the connection?

We look forward to the conversation!

 

[mfgenggear]

ok I used AI to find me a lead.
can some one vet the following calculations
link

https://www.padtinc.com/wp-content/uploads/2022/03/PADT-ANSYS-Fastener_Simulation_Part1.pdf

 

[mfgenggear]

True - I was referring to the generalized use of tapered threads and their limited axial location capacity.

NPT on its own is optimized for pipes, not structures, and is not suitable for applications where broad axial adjustment is expected or wanted.

according to this web page 4 threads of engagement.

https://www.padtinc.com/wp-content/uploads/2022/03/PADT-ANSYS-Fastener_Simulation_Part1.pdf