Calculating Pressure Vessel Thickness with Given Data

[naggar218]

Homework Statement

Problem: find the thickness of a Pressure Vessel.
Given: Operating Pressure, Operating Temperature, Material type and Grade, and OUTSIDE Diameter/Radius

Homework Equations

q1. how to calculate Design Pressure/Temp. from Operating Pressure/Temp.?
q2. how to calculate INSIDE Radius using OUTSIDE Radius (note that thickness is needed)?

The Attempt at a Solution

I tried to obtain the thickness of that pressure vessel using (ASME Code SEC.VIII, DIV.2, ARTICLE.2)'s formula, but it only takes INSIDE Diameter, so how can i obtain Inside Diameter to get the thickness.
Or is there any other way that doesn't require INSIDE Diameter to get the thickness.

 

[rock.freak667]

You could use the OD in the equation and then subtract t to get the ID. Then just check to see if the calculated ID can withstand the pressure.

 

[LawrenceC]

Why don't you guess a thickness which then provides an inside diameter. Go through the code calculations with the guessed thickness and see if you come up with the same ratings.

If it's greater than 5 cubic feet there should be paperwork/records on it somewhere.