Recent content by wailunwu

Hi Can someone give me an example or a situation that demonstrates the use of joint efficiency E=0.85 (spot) for type 1 category D joint (e.g. nozzle neck to shell corner joint) per table UW-12 ? In what situation would this be critical in design? Many cases, I only see nozzle neck thickness...

Hi I would like to know where I can find the upper and lower transformation temperatures for different carbon steel. Are there tables/charts for that in the code? Thanks, Alan

@Duwe6 Do you have any reference or calculation to size the washers?

PV Elite is used to design a vertical pressure vessel. It has passed the PV elite Calculations. However, PV Elite does not perform any calculations on the topring/ basering anchor hole size (just the anchor bolt size calculation). I was told that typically the diameter of the anchor bolt holes...

Thank you

Hi I have a vertical vessel that is in operating in cold temperature (-100 deg F). I would like to find out how much the vessel contracts vertically. Table TE-1 does not indicate coefficients for temperature below 70 deg F. Where can I find the thermal coeff for this case or information on...

Para 5.7.2.9 states the requirement between the outer edges of the reinforcing plate fillet welds (closer than 8w or 6in). This is the same requirement for fig 5.6, column E, with shell thickness t > 0.5, as welded condition. My question is: Does Para 5.7.2.9 only apply to t > 0.5in as welded...

I am referring to a vertical pressure vessel tested vertically.

Hi mike I think my confusion lies in whether to add static head water pressure to mawp before ug99b calculation or add static head pressure to calculated hydro test pressure after ug99b calculation. Why do you suggest that static Head needs to be added to mawp before ug99b test pressure...

Hi I am getting mixed answers with the following as I read past threads and would like clarification: When using UG99b to calculate hydrostatic pressure (P = 1.3 * M.A.W.P. * Sa/S), whether testing the vessel horizontally or vertically, I will need to ADD the water static head to get the...

ASME Sec VIII Div 1

Hi When designing a cone bottom vessel for external pressure, in which case would we design the cone ends as line of support and which case we should not? Should the bottom cone attaching to the cylinder always be line of support? Please advise. Thanks

Hi I would like a clarification on the MAWP and MDMT that is listed on the nameplate. What should be the temperature that completes the following statement? Is it design temp, MDMT or operating pressure? example--> MAWP: 152 psig @ ?? deg F What should be the pressure that is used to record...

The software I am using is PV Elite

Hi I have a vertical vessel with lug supports. Client asked for NBC2010 seismic design code but I received the following warning when using NBC2010 Seismic Design Code: "Warning: This is a vertical vessel on support lugs and the earthquake type selected is a building code. Building codes...