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
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...
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...
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...
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...
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...
I would like clarification on the design of vertical vessel skirt, basering and anchor bolts when considering seismic/ wind load. My question is: shall they be designed assuming the vessel is full or empty? Which is the more conservative?
I was told that if designed assuming the vessel is...
HI
Assuming even distribution of fuel and air in the engine, why is peak/best engine power not at peak EGT (with stoichiometric fuel to air ratio 14.7 to 1)? I was told that best power is at a slightly rich fuel to rich ratio.
If 14.7:1 gives the most efficient combustion (with no excess...
From PV Elite, gasket material m and y values are required to determine the bolt area.
1) Can custom flange be designed to appendix 2 asme sec VIII div 1 without knowing the gasket (m and y values)? The flange thickness and number of bolts seem to have an effect on this.
2) For standard...
A vessel with internal design pressure of 21.737 psig is to be designed with full vacuum. A stayed jacket is also added. What is the pressure between the stayed jacket and vessel shell wall that I should be using when doing thickness due to 'external' pressure calculation for the vessel wall...
Hi
ASME VIII Div 1, para UW-18 (d), Specified Fillet weld strength . Is there a similar paragraph to evaluate the strength of butt weld? How would I go about evaluating (full penetration) butt weld allowable load/ strength?
Thanks,
Alan
Hello
Existing Flare stack (187 ft) is required to be taken down from vertical position to horizontal position for repair. Original drawings for this stack indicate that the original lugs are only for erection purpose and shall not be used after erection.
One option recommended to me is to...
An opening on the shell wall is required for equipment access to an existing heater/ vessel (approx 33ft dia) for future use and repair. A size of rectangular opening 6'-0" (height) by 2'-0" (width) is required. I was given a suggested design for the opening which is to weld 3"x3"x1/4" angles...
