Can someone please clarify ASME B16.34, paga. 6.1.6 (b)?

>>>>>>>>>>>>>>>>>>API Cast Steel Valves

the area that is under minimum wall must fit in a circle with a diameter of 0.35*SQRT(do*to)

do = the inner diameter (per the rules defined in the paragraph)

to = the minimum wall

So lets say your inner diameter is 12" and your minimum wall is 3"

3*12 = 36, sqrt(36)= 6

6*0.35 = 2.1

So if you draw a circle around the area on the casting that is under the required minimum wall section that circle must be less than or equal to 2.1" in diameter.

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