Minimum_Design_Temperature_Toughness
Minimum_Design_Temperature_Toughness
(OP)
Hello,
For gas pipe (buried at around 5 to 6 ft), I am trying to determine the Minimum Design Temprature for toughness purpose. I am assuming that minimum designTemperature of the pipe can be the same as the minimum ground temperature at that depth (5 to 6 ft).
The question is how to obtain that temperature. I do have the minimum air temperature for the subject location but I was wondering if I need to do ground heat transfer analysis to obtain the ground temperature at that depth.
Thanks for help.
For gas pipe (buried at around 5 to 6 ft), I am trying to determine the Minimum Design Temprature for toughness purpose. I am assuming that minimum designTemperature of the pipe can be the same as the minimum ground temperature at that depth (5 to 6 ft).
The question is how to obtain that temperature. I do have the minimum air temperature for the subject location but I was wondering if I need to do ground heat transfer analysis to obtain the ground temperature at that depth.
Thanks for help.





RE: Minimum_Design_Temperature_Toughness
RE: Minimum_Design_Temperature_Toughness
RE: Minimum_Design_Temperature_Toughness
RE: Minimum_Design_Temperature_Toughness
http://www.eng-tips.com/viewthread.cfm?qid=406156
RE: Minimum_Design_Temperature_Toughness
SNORGY: it is a good approach to linearly interpolate between using the minimum air temperature and the frost depth.
I guess the interpolation should be between the minimum ground surface temperature (not the air temperature and the frost depth). I think one should have accuracy within 5 degree , at least.
The issue is that it is not easy to calculate the minimum ground temperature (from the air temperature) because it depends on surface condition, snow cover, etc. I am wondering how this issue/point is not covered well in literature. When installing pipe in cold region, knowing the ground temperature at burial depth is very important. No guidelines in the pipeline literature are provided to determine this temperature.