NPT pressure ratings
NPT pressure ratings
(OP)
Is there are reference source on the net that I use to find the pressure ratings for NPT connections?
Specifically, I need to know the ratings on 1/4" & 1/2" NPT connections.
Thanks
Specifically, I need to know the ratings on 1/4" & 1/2" NPT connections.
Thanks





RE: NPT pressure ratings
RE: NPT pressure ratings
http://www.swagelok.com/downloads/webcatalogs/MS-01-147.pdf
Obviously the max rating will depend on the application, forces on the connection, connection material, safety factors, etc.
NPT threads are capable of sealing reasonably well at higher pressures but other connections types are much more reliable.
RE: NPT pressure ratings
NS < 3" : max 27.5 bar
NS < 2" : max 41.5 bar
NS < 1" : max 83 bar
3/4 and smaller: max 103.5 bar
RE: NPT pressure ratings
Barlow’s formula will determine pipe yield and burst, the thread will be limited by the yield of the male and female materials, and the tensile stress area of the threads. Again the bore will effect the tensile stress area of the internal thread.