NPT/BSP thread compatability
NPT/BSP thread compatability
(OP)
How compatible are NPT threads with BSP threads ? I've heard varying comments where it's not a problem to screw one type into the other, and other sources that say it is not possible. We are only using threaded connection after block valves typically for connecting to instruments/vendor supplied items.





RE: NPT/BSP thread compatability
RE: NPT/BSP thread compatability
RE: NPT/BSP thread compatability
BSP thread sizes typically are 1 pitch number higher than the NPT threads. I.e. in 1/4" pipe size, the NPT thread is 18 threads/inch; BSP is 19 threads/inch. There are other differences (in thread form for instance) as well. Bottom line is the two don't mate up.
RE: NPT/BSP thread compatability
Can be screwed in, but will not work at all, the threads as I recall, are much finer on the BSP vs. NPT, so there is no way to obtain a seal. Taper appeared similar, just thread count per inch was finer on the BSP.
PUMPDESIGNER
RE: NPT/BSP thread compatability