just curious to know if anybody has ever been taught, or figured out really good rules of thumb that work for you.
i do realize that there are seasoned plumbers and pipefitters that could teach me many things about threaded joints. this is more for the young men just starting in the trades.
the one that i use most has to do with pipe threads and fittings. i've mentioned it before and i do think it's worth mentioning again. it has saved me from the frustrating fittings/nipples/pipe joints that used to leak when i installed them. of course that's when i was a younger man.
Northern Alberta Institute of Technology rule of thumb;
3 threads should be visible after tightening. anymore or anyless should make you question the joint.
either the fitting/nipple/pipe thread is bad, or it's crossthreaded.
too little thread (bottoming out) showing is either;
-male thread is cut too deep
-female threads where cut too deep from the factory
-the fitting is used and stretched.
too much thread could be one of the following;
-male thread not cut deep enough
-female thread on fitting not cut deep enough from the factory
save yourself the headache and embarassment of the joint leaking in front of the customer, not to mention the call-back.
works for me everytime.
ps if i missed something please tell me.