Low temperature piping and pipeline
Low temperature piping and pipeline
(OP)
hi all,
i want to evaluate the capability of existing piping (ASTM A 106, Sch 40) and pipeline (API 5L X65 sch 80)
is it capable to be operated in low temperature (33 F) and pressure (530 psia) ?
as far as i know, low temperature will give significant effect in brittleness, but how do i evaluate this ?
i need your help. thanks in advance :)
i want to evaluate the capability of existing piping (ASTM A 106, Sch 40) and pipeline (API 5L X65 sch 80)
is it capable to be operated in low temperature (33 F) and pressure (530 psia) ?
as far as i know, low temperature will give significant effect in brittleness, but how do i evaluate this ?
i need your help. thanks in advance :)





RE: Low temperature piping and pipeline
What temperature do you read from the table?
RE: Low temperature piping and pipeline
Steve Jones
Corrosion Management Consultant
http://www.linkedin.com/pub/8/83b/b04
All answers are personal opinions only and are in no way connected with any employer.
RE: Low temperature piping and pipeline
Where you may get trouble is simply from stress reversed from usual patterns. Instead of compression you will have tension in axial direction. Axial tension combined with tension in the hoop actually produce a lesser total shear stress and axial tension eliminates the potential for Euler buckling. Design for tension and you have it beat.
RE: Low temperature piping and pipeline
Pressure - Depends on the size and wall thickness. BTW most pipelines designed to a pipeline code are described in thickness of steel not schedule, but that's probably just me....
The real issue at that temperature is frost heave, constant condensation and ice forming on any above ground bits of pipe or equipment plus as BI says, the pipe will be in tension due to temperature and pressure effects.
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Low temperature piping and pipeline
As BI and LI have indicated, you should not have any great concerns.
RE: Low temperature piping and pipeline
RE: Low temperature piping and pipeline
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Low temperature piping and pipeline
If carbon steel is silicon killed, it should be good down to -20degC without further testing.
Vaguely recall grades manufactured pre 1990 (?) are the ones to watch out for.
RE: Low temperature piping and pipeline
Assuming your system was designed according to the rules of ASME B31.3 (process piping), please follow the instructions of 323.2.2 for low temp. limits and toughness test requirements.