I am designing a quarter turn ball control valve. I have system inputs for pressure ranging from 350-750 psi and a flowrate of 52 gpm. It has also been given that due to another valve downstream, the backpressure at my valve's outlet will be 150 psi. With these values it seems I automatically...
A bolt circle was machined .200" too small on a valve bonnet (top flange). Production saw fit to just remachine the bolt circle at the correct dimension ontop of the smaller bolt circle, and as a result there is now 14% less nut bearing surface area (see attached sketch). How should I approach...
The input:
I have a 2" nominal pipe (2.375" outer diameter) that I need to socket weld into a bore I'm referencing from B16.11. B16.11 for a 2" nominal pipe gives "B", the socket bore diameter, as 2.426/2.406.
My questions:
1) Why is there such a large gap (.031" min) between pipe OD and...
I am designing a 1", quarter-turn ball control valve and in need of some overall guidance.
The inlet and outlet seat trims are modified with a pattern of holes intended to help reduce flow. The valve is required to pass water at a flow rate of 19 gpm, with inlet pressures ranging from 750 psig...
B16.25 Table 1,I-1; Dimensions of Welding Ends gives values for NPS down to 2-1/2". Where could I obtain dimensions for buttwelding ends less than 2-1/2"?
I've seen differing abbreviations for Grade 2 Titanium on manufacturer and supplier websites. Some call out Grade 2 as CP-2, while others, CP-3. Some define Grade 3 as CP-2. Which is it? ASTM B 348-08a does not define nor distinguish any abbreviations for Titanium.
Because BX gaskets are pressure energized seals, does this qualify them as "self-energized" as defined by Section VIII Div. 2? Table 4.16.1 (gasket factors for determining bolt loads) gives "m" and "y" as 0 for self-energizing gaskets, but the seating stress for ring joints is very high. Which...
Section 6.1.1 gives that Table 3 minimum wall thickness values and the equation in Mandatory Appendix VI are essentially the same.
How are these values related to material allowable stress, ultimate strength, and yield strength? For example, if I've got a valve body made out of 316, the wall...
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...
I cannot find documentation governing flange O.D. tolerance in B16.5. Paragraph 7 (Tolerances) lists those for facings, but not for actual flange O.D. Am I looking in the correct place?
