I have following questions on measurement of pitch diameter for ASME B1.1 UNC threads.
1)Is there a standard which gives guidelines on how to
determine pitch diameter of threads by 3- wire method.
2)What is the fastest method on measuring pitch diameter
for fasteners. (I am referring...
I have to conduct failure analysis on some screwed fittings used in fire fighting industry. These are used to connect pipes & sprinkler heads. We have a situation where some of the fittings along with pipe nipples, sprinkler heads installed in them have been returned as leaking after six months...
Has anybody ever experienced shrinkage in EPDM material. We have gaskets made of EPDM. The cross-section of the gaskets is "C" shaped & they are circular. We have observed over a period of time the diameter shrinks by about 2% over six months.
Any suggestions on how to fix this.
We need to have 2 1/2" (8 pitch) NPT female threads in one of our components. The tapping is in a partially blind hole. (at the bottom of the thread there is a 1/2" opening)
1) What is the right procedure for drilling & tapping. Should we taper machine the hole before we machine. How...
