As someone who inspects natural gas pipeline at point of manufacture I can firmly say yes(although i see no mention of wall thickness on the diagram). In all reality, the gauge of the wall is much more pertinent than the diameter of the pipe for this application. I can't believe that the person who did this diagram was not exposed to this forum, and therefore am very disappointed that they didn't clear it with WV first. This is not the first time HF stuff has made it's way to other venues without proper credit given (dejoha diagrams).
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