I'm trying to identify an aluminum alloy. Per the mass spec, it's 0.25% magnesium and 99.75% aluminum. (There are trace amounts of oxygen, carbon, and tungsten, but I assumed those were oxidation or residue from the cutting tools and discounted them.) The only alloys I can find that contain...
I procured a number of smaller pressure vessels with torispherical heads. On QC, some of the heads are out of tolerance. The inside radius is nominally 24 in, allowed to be up to 24.3 per Sec 8 Div 1 UG-81, and actually measures up to 24.5. I would rather just use these if there's a way to...
I'm looking for some guidance on UNF-19 (a), which forbids fillet welds in shells or heads of titanium vessels. Does anyone know the reason for this? We're having to implement some awkward workarounds, and without knowing the reason for avoiding fillet welds, I'm not even sure if our...
We are designing a part and trying to clarify for our suppliers and vendors what parts are allowable under Section 2 Part D. I have read the intro, and don't see any explanation about when the temper and thickness given in the charts apply. Is this the temper and thickness of the raw material...
I am analyzing a component in accordance with the BPVC, which I am not very familiar with, and I'm stuck on practically the first paragraph. UG-4 says materials subject to pressure stress shall conform to Section II, Part D, Subpart 1, Tables 1A, 1B, and 3, which list material properties. In...
I am checking a pressure system to ensure that it meets the requirements of B31.9 The system has a number of unlisted components. These are probably perfectly adequate components, and we are using them within the manufacturers' ratings, but they were not designed to the specs listed in Table...
I am trying to calculate the stresses in the welds at the base of a support stand (see attached picture). (The weld is a fillet weld around all sizes of a square cross-section column.) It looks to me like there is no shear stress but only a stress from the bending moment, so there would be no...
I am analyzing a pressure vessel design in accordance with the BPVC. It consists of a supply line, a section of pipe connecting the supply line to the pressure vessel, a return line and another section of pipe connecting the return line to the pressure vessel. To evaluate the pipe under...
