Thanks for a very helpful answer, Danw2. This information, coupled with what I found in PIP, gives me the information I need. (This is the first time I've posted a thread. The speed of response, and informative reply is terrific!)
I'm doing a literature search to find out what standards may provide specific direction on minimum sizes for instrument tubing. The closest I've come is in PIP. Our internal standards lay out these minimums, but I'm having a tough time locating the acknowledged source for these requirements...
