WCTHemi isn't correct in them all being the same trade, while historically the employers used to allow plumbers to pull pipefitting job slips its not common anymore, its dictated by the employer whether or not they are willing to do this. With the current labrynth of safety paperwork and certification files that the clients safety depts want to see I'd doubt that it happens much at all, at least on sites with stringent safety programs.
I was wondering with all the threads we see here on AO (being that its the central information Hub for all things power engineering
) if a journeyman steamfitter taking power engineering would be able to simply write off the steam hours if they were crossing over to PE?