I was reviewing some calculation notes on this topic and noticed that when the test point is above the design liquid level, the Y value becomes negative. If I proceed with the equations using a negative Y value, I sometimes end up with unusual and excessively high thickness requirements for...
I have encountered a standard interpretation issue that has raised some doubts. According to API 650, the following is stated:
"5.9.1.3 All tanks shall be stiffened by intermediate wind girders when required by 5.9.6. Vacuum stiffeners, when required by Annex V, may be considered to also act as...
Hi, before asking the question I want to thank you for your time. I have a doubt on the standard wording.
On API 650 5.7.7.6 you calculate the nominal thickness of the bottom reinforcing plate with the equations given. Later we have a note:
tbr is the minimum thickness of the bottom...
It's pretty clear the procedure to find t2 in an inspection plane for a localized corroded area. My doubt about the procedure, once I get t2 and calculate the value of L with the 4.3.2.1.b equation. When I calculate t1, I have to get all the measurements 0.5 L on top of t2 location and 0.5 L on...
API 650 says this
F.8.2 The counterbalancing weight, in addition to the requirements in 5.12, shall be designed so that the resistance
to uplift at the bottom of the shell will be the greater of the following.
a) The uplift produced by 1.5 times the design pressure of the corroded empty tank...
Hi, I am trying to figure out how to extract the data from the P.2a to P.2l graphs. There is an example problem on P.2.9.1 and in the solution it gets a value of 3.1 x 10-4 for KR/E(2a) on Figure P.2a. I enter that figure and dont understand how to get that value. Is there a tabulated graph or...
I'm checking the intermediate wind girder requirements as per 5.9.6.6.
Anyone know how to calculate h1 value when having multiple wind girders?
From the standard I get the following:
"h1 is the vertical distance, in meters, between the intermediate wind girder and the top angle of the shell or...
Hi, on API 650 paragraph 5.12.7 refers to AISI reference as an acceptable procedure for anchor chair design. When I check the reference in order to calculate shell stress an anchors there is a difference in the Z reduction factor with other references like Denis Moss Pressure Vessel Handbook...
Hello, I've been looking for some information on how to calculate the load distribution of roof plates in shell and columns.
Table 5.21 of API 650 standard uses two areas, Arss and Arsc, being the area of tank roof supported by shell or columns. And also uses Wrss and Wrsc being the weight of...
