Minimum number of threads required to engage

[som1973]

Hi,
I need to calculate Minimum number of threads required for two pipes to engage, The Pipes are having NPSM (American Standard Straight Mechanical Pipe Thread)

Pipe size = 4"-8TPI (NPSM Thread)

The pressure in the pipe is around 75 PSI.

I have considered two threads for engagement, Is this sufficient to withstand 75 psi pressure ?

Thanks in advance

 

[StevenHPerry]

How did you come up with 2 threads?

Have you consulted B1.20.1?

- Steve Perry

http://www.linkedin.com/in/stevenhperry

This post is designed to provide accurate and authoritative information in regard to the subject matter covered. It is offered with the understanding that the author is not engaged in rendering engineering or other professional service. If you need help, get help, and PAY FOR IT.

 

[StoneCold]

som1973
I hope you don't ever meet the guy who has to put 4" pipe threads together, he might not be that nice to you.

Why not ANSI flanged? Or Sanitary Clamps, or Victaulic? or Tri-Lobe threads.

Regards
StoneCold

 

[chicopee]

Machinist handbook will show you the path.