1. Table 3-B gives valve body minimum wall thicknesses based on inside diameter. I believe these values are based on a 30k min yield material. Is this true? 2. For an 8" full bore 2500# valve, B16.5 table F22 gives a hub diameter "x" of 12.00". With an 8" thru bore, the wall thickness between the body and the flanges, due to the "hub diameter" will be sub minimum (1.97" vs. required 2.83"). Increasing the "hub diameter" in order to meet the 16.34 wall thickness requirement will interfere with nuts sitting on B16.5 dictated bolt circle. What am I missing here?The valve can have a larger diameter than 5.75" and still meet B16.34 (it could have a smaller one for that matter) since the port diameter appendix is non-mandatory. Generally though the port diameter of the valve will be in accordance with API 600 (if this is a gate, globe or swing check valve) which requires 5.75".This is a trunnion mounted ball valve design, with a full 8" bore (8.062" to be exact). So I assume I would, in fact, use 2.83" as my min wall thickness, as provided by table 3-B in B16.34.

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