Are you referencing as to how to draw P&ID's or how to develop and design? There are numerous software packages that make it very easy to track and draw the P&ID. Designing is a different matter though.
I would start by joining ISA, subscribing to all the I&C trade magazines you can find. What you're trying to do is avoid having to hire an Instrumentation and Control consultant. I've been doing I&C design for over 30 years and I can assure you, there is no magic design guide that lets you master P&ID development in a week or less. Good luck.
I am assuming that your experience level is quite limited in this area, therefore I can provide some info, but you would also be well advised to discuss this with some more senior individuals in your office regarding how they like to develop their P&ID schematics. I say this, because there is some personal preference in this area.
Firstly, prepare a logical flow diagram of your entire process. Break it down into the major components and determine how you want to identify each process. For example all piping and valving concerning raw water shall be "A" or "R" or whatever you choose and then define the piping sequence label (10, 100, 1000) etc. Your instrumentation and valving should fit within these general label for ease of reference and logical sequencing in the process.
Secondly, arrange the drawing in a logical format, being careful not to cluster or crowd too much. With today's technology, you can always cut, but it takes more time to split up a cluttered process sheet. Leave plenty of room between processes or components to add piping, valves, flow controls, instrumentation, etc., and their requisite labelling.
Thirdly, seek out assistance or older P&ID's generated by your office to get a feel as to what it should look like and you firm's preferences. This will include use of colour, layout philosophy, process identification and legend table.
Forthly, there are a number of good software programs that provides valuable assistance and allows the entire process to be much easier. Cost will be a consideration.
Tgrief: I should have clarified that I'm interested to learn to do p+id's for simple domestic water pump stations, say with 1 duty and 1 standby pump where we're monitoring suction and discharge pressure, flow rate, pump speed and have a timed delay on pump start up after shut down.
KRS: Thanks also for for your input. Very practical considerations. I wouldn't use software, but do it by hand, given the simplicity. One other question: are there elements which are definitely not included in a p+id? Or is the designer the one to decide what gets included and what doesn't, like omitting non-essentials?
