Today I made several different drawings for BTEC again, I am mainly focusing on Hot Oil drawins. Which BTEC represents as HO in their drawings and data sheets. Besides Hot Oil there are almost a dozen other kinds of abbreviations to represent different types of pipelines: PG, GP, AV, RF, R, PF, and many more that I havn't memorized, as too which one means on paper that I do not know but they all represent the type of gas or liquid that runs through that specific pipe. For every different drawing there is its own drawing number such as HO-570, in this case, the way I understand it is that pipeline series 570 contains Hot Oil for some purpose on the plant. HO-570 is a way to designate what that drawing is both on the plant and on paper. The drawing number for each drawing is puller from its very specific line number such as 570-4"-HO-B1-CS-2" HH. I am not sure what every thing means but I know the beginning three numbers represents the specific line the first set of letters represents what that pipeline is carrying and the number in between the two represents what size the