In my upbringing in the chemical industry I had the opportunity to work with some outstanding engineers; too many to mention by name. These men and women took time out of their busy schedules to teach me process safety. One of these engineers was very strict about his process piping and every engineer in the units that were PSM (and then RMP later on) were expected to be intimately familiar with their process piping. So much, that the engineering manager would walk out to the unit, walk up to a run of pipe, touch it and the unit engineer would have to provide all the facts about that run of pipe. Could you answer these questions WITH DOCUMENTED PSI/MI data to support your answers?