To IRstuff
It isn't for school because you're right it seems to be. But what I wanted is to analyse this two questions.
The first question deals with writing operation procedure on process eqpt (underway), and I wanted to have someboby having long experience in oil and gas operational engineering to give me if there are some situations related to my question.
The second question is related to safety , How? in our plant, I was asked to not isolate by sleep plate near pump taken to be overhauled so only put spectacle blind. So far in our work permit it doesn't mind which one is preferally to be placed. Unless for high pressure, I've never seen isolating using sleep plate.