dennis wrote:Thanks, Sky. Good suggestion. I wonder why they show a 3/8 Standard, instead of 3/8 NPT, for the plug in the IPL?
No, you got it pretty much correct... as a general rule of thumb... helps to realize the reasons - Pipes are used to transport something, and tubes to construct something; hence, tubes are defined by the outside diameter and wall thickness (for construction stability), and pipes are measured by inside diameter to allow a calculation for how much volume the pipe can carry... (I.D., using Pi to get area, multiply by length = volume of a given dimension of pipe... calculations can then be made to compare things like flow rates of a given material, finish, etc.. or pressure limits, and so on.. which is why many fuel lines are measured by the I.D. as well... even though they are called tubing.. )Skywatcher wrote:Hi BG
The way I had the differences explained to me when I first came to Canada was pipe was measured by the nominal inside diameter whereas tubing is measured by the actual outside diameter. Therefore, ⅜" pipe has an outside diameter of around ¾" whereas ⅜" tubing will have an inside diameter of ¼" to 5/16" depending on the pressure rating of the tubing. Was I taught correctly or was someone pulling the wool over my eyes? All the best,
Sky
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