Trying to calculate wall thickness
Trying to calculate wall thickness
(OP)
for gas project. I knew which material to use in material specification, but process didn't specify final design temperature and pressure yet.
I got basis allowable stress for 31.3
I don't know where I can design pressure and temperature?
I want to full flange rating to do the calculation, is that means I will use 16.5 pressure-temperature rating table to calculate wall thickness?
thanks in advance for any input
cheers
I got basis allowable stress for 31.3
I don't know where I can design pressure and temperature?
I want to full flange rating to do the calculation, is that means I will use 16.5 pressure-temperature rating table to calculate wall thickness?
thanks in advance for any input
cheers





RE: Trying to calculate wall thickness
RE: Trying to calculate wall thickness
**********************
"Pumping accounts for 20% of the world's energy used by electric motors and 25-50% of the total electrical energy usage in certain industrial facilities."-DOE statistic (Note: Make that 99% for pipeline companies) http://virtualpipeline.spaces.live.com/
RE: Trying to calculate wall thickness
Dan
www.eltronresearch.com
Dan's Blog
RE: Trying to calculate wall thickness
Biginch, in my experience process engineering will give maximum operational pressures and temperatures. I then take these values and add to them using appropriate factors based on the values. I use the CASTI guidbook on B31.3 process piping as a guidline for selecting design pressures and temperatures above the worst operational conditions.
Just my two cents worth.
A question properly stated is a problem half solved.
Always remember, free advice is worth exactly what you pay for it!
RE: Trying to calculate wall thickness
I use this temperature to proceed my calculation, got all of the pipe2" and is standard wall which is acceptable, right
Below 2" for thread connection, use one level thicker pipe wall which is XS.
is this method ok?
thanks for your input...
RE: Trying to calculate wall thickness
**********************
"Pumping accounts for 20% of the world's energy used by electric motors and 25-50% of the total electrical energy usage in certain industrial facilities."-DOE statistic (Note: Make that 99% for pipeline companies) http://virtualpipeline.spaces.live.com/
RE: Trying to calculate wall thickness
Tr = (Tp + CA) / (100-12.5)% Where 12.5% is Manuf's undertolerance (for pipes to 24")
I use these 2 equation to calculate how I will know hoop stress and thermal load stress....
need more calculation?
thanks
RE: Trying to calculate wall thickness
RE: Trying to calculate wall thickness
**********************
"Pumping accounts for 20% of the world's energy used by electric motors and 25-50% of the total electrical energy usage in certain industrial facilities."-DOE statistic (Note: Make that 99% for pipeline companies) http://virtualpipeline.spaces.live.com/
RE: Trying to calculate wall thickness