The B&B P.B.S. – Purge Bag System is the most common inflatable purge bag method in use. This simple and proven design requires little training and immediate results are achieved. For smaller pipe diameters, purge times are usually within 2-10 minutes all while achieving shiny oxidization free welds. It is not uncommon to pay for the purge bag in as little as 3 or 4 uses in time savings alone. Sizes range from 2″ – 24″.