what is spooling of pipe what is its usage in PDMS

Please give a explanation on what is spooling of pipe and what is the use of spooler module in PDMS

you can use it to create documentation about spools.

U may read about it here(sorry its on russian):[URL="http://faq.dabacon.ru/index.php?qa=147&qa_1=%D1%87%D1%82%D0%BE-%D1%82%D0%B0%D0%BA%D0%BE%D0%B5-spool"]
faq.dabacon.ru/index.php

Spooling is a piping term used to describe the distance between the ff:
1. Fitting to Fitting e.g. elbow to reducer, elbow to elbow, valve to reducer etc.
2. Fittings to Nozzle

A standard governs this choice which is: For fittings of NP<= 6, the minimum spool lenght used is 3inches. But for Pipe sizes above > NPS6, the minimum pipe spool lenght to be used must be (1 * Pipe NPS). So for NPS 8, we have a minimum pipe spool lenght of 8 inches and so on.