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PL definition in ASME code

PL definition in ASME code

PL definition in ASME code


The sqrt(rt) or 2.5sqrt(rt) is just used to define the PL. The 2.5sqrt(RT) is applicable to the distance between two exceeding 1.1Sm local regions, and sqrt(rt) is the criteria for define the PL region regarding one local region. what I want to ask is, what the realing meanding about the highlighted words of "involving axisymmetric membrane stress distributions" in the ASME-III-NB-3213.10? because I found the same sentence in VIII-2 as shown in the pic. has no such words. so it arise a questions that, for the two nozzles longitudinally on cylinder, because there are no axisymmetic stress at nozzle regions, so if we want to define the two regions as PL, we only need to make them not ovlapped; But if per VIII-2, we should make them apart from 2.5sqrt(rt),because there are no "involving axisymmetric membrane stress distributions" words in VIII-2.
in other words, ASME-III-NB and ASME-VIII-2 may be not consistent, so which is the correct answer?

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