Throughout my career I have worked with a ton of older vessels, 30s, 40s, and i notice the actual readings on these vessels were higher than what the nameplate and Appendix G forms said.
The nameplate and Appendix G forms don't normally say "nominal" but just "thickness".
So why was it common...
I feel a bit silly asking this question:
how come for Tmin calculations, the radius or diameter isn't usually changed even when there is metal loss?
I worked at some companies where the design radius/diameter was used but that does change a little over time due to metal loss.
Hi all,
I'm typically use the beam stress theory to calculation the structural minimum required thickness of a pipe. Here is the code that I'm using:
https://gist.github.com/flare9x/94c29240a1be02f987872ef2f4e5f1be
For reference, this method was derived from this article (paywall)...
I have a silly question in which I'm having a hard time wrapping my head around.
ASME Section II provides specs for different types of alloys. For example, SA-693 has to have a certain chemical composition, material properties, tolerances, etc. From what i know, SA-693 is Stainless Steel...
This item says:
"All piping, except piping handling expanded foam for other than subsurface application, shall be subjected to a 2-hour hydrostatic pressure gauge test"
What does this mean: "except piping handling expanded foam for other than subsurface application"? Not sure what it's...
ASME VIII U-1(2) says the following:
"Piping component, such as s pipe; flanges; bolting; gaskets; valves; fittings; the pressure- containing parts of other components such as strainers; filters; and devices that serve such purposes as mixing, separating, snubbing, distributing, metering or...
When I look at the minimum thickness calculation in ASME VIII, I notice the calculation requires a greater metal thickness than say B31.3. Even if you account for the same material this is still the case.
This a common issue with chemical plants when they design a small vessel using the Piping...
