I doubt you're going to find such a pipe. The very nature of a well designed piping system is that it maintains its integrity. Well I guess you could break a glass pipe, but that would be a safety hazard. Normally a situation like this would be dealt with via plant SOPs.
What is the length of...
I've used gear pumps in low flow, high head applications including flammable liquid service. Viking has a nice selection of gear pumps (www.vikingpump.com). You'll find that the discharge pressure will be more than you're looking for, but that is easy enough to deal with. Are you sure 20 psig...
About 25% of the total system head is a good rule of thumb for a control valve. I've seen the 5 psig before and believe that it stems from the typical low system head seen in HHW and CHW system, and a lot of people don't know how to size control valves. Its not hard, but in HVAC I've seen a...
