Natural gas pipe temperature

[lola.furtado]

Hi guys! I'm a student working on a class proyect and i have two questions:

I have to design a gas pipe. ¿Should i use a maximum temperature or a minum one? ¿Why?

Sorry if it's the wrong forum!
Please help me, thank you!!

 

[rb1957]

by checking each ! how do you know which temperature will give you the largest (smallest?) diameter ?? (if you knew that you'd've never posted your question !)

Then having decided on a diameter you "should" then show that each design point is achieved with whatever design parameter being less than whatever critical value.

Apologies, but this got "silly" quite some time ago, so this'll be my last post on this thread.

 

[Snickster]

When designing something in the real world it needs to work under all design conditions. All temperatures therefore apply but you don't have to do the entire calculation for all possible design conditions if you take short cuts. Looking at the design equations you can tell which temperature gives you the worst case conditions and largest diameter or highest wall thickness pipe. This is typically the highest temperature for line sizing purposes.

 

[akpipelineengr]

How do i know wich one is critical?

By running multiple cases and determining which gives you the largest diameter.