Pipe for negative temperatures
Pipe for negative temperatures
(OP)
Hi,
I need to select a pipe to work at -30 ºC and 20 bar, and i'm inclined to select a stainless steel, but i can't find a data sheet to select it. The ideal thing is to find some data sheet that follos ASME Code.
So does anyone knows any data sheet to select the pipe material and thickness, for this conditions, and the ASME code to be applied for this conditions?
Thank you soo much!
I need to select a pipe to work at -30 ºC and 20 bar, and i'm inclined to select a stainless steel, but i can't find a data sheet to select it. The ideal thing is to find some data sheet that follos ASME Code.
So does anyone knows any data sheet to select the pipe material and thickness, for this conditions, and the ASME code to be applied for this conditions?
Thank you soo much!





RE: Pipe for negative temperatures
Piping Engineering is simply not a matter of "finding a datasheet that will permit something"
Piping systems are most often designed by competent engineers in an integrated manner, with specific concern expressed for:
- Material selection at extreme conditions
- Pressure design of all components at design pressures
- Flange and valve ratings
- Evaluation of expansion, contraction, overall flexibility and support systems
- Vibration, deadload and transient loadings
Have you ever been involved with piping design and engineering before ?
-MJC
RE: Pipe for negative temperatures
Why did you post here before you “did your homework”?
It would be greatly appreciated if you would at least make an effort to find an answer to such a fundamental question before you post. Then, observe the protocol of discussion forum etiquette.
First, learn how to use the search function provided by the forum – it is likely that your question (like many “fundamental” questions) may have been asked before, several times . The discussion board search functions can provide many of the answers you are looking for without you having to look (shall we say) “naïve”.
Before you post, learn how to ask “good questions” of the discussion board community. And again, do your homework - try to find answers to your “good questions” using your own intelligence. Remember, to ask the community to “spoon-feed” you lesson on piping engineering is to insult the intelligence of the community. Learn how to frame a “good question” unambiguously – take the time to provide all the information in support of your “good question” (the better thought-out the question, the more response you will get). Visit the forums even when you do not have a question as there will be questions asked there that you may not have thought of.
http://www.tipmaster.com/includes/refinfo.cfm
RE: Pipe for negative temperatures
RE: Pipe for negative temperatures
Thanks for the reply.
I'm somehow disapointed with all your answers. Maybe i failed, but my intention was to ask for help so that i didn't spend my entire afternoon of work to find this. In fact, i think that's why this kind of forums are made: SO THAT PEOPLE CAN SHARE INFORMATION! WHAT FOR SOME OF US ONE SUBJECT IS COMMON, DOESN'T MEAN THAT ALL NEED TO KNOW IT!
As you all know, Mechanical Engineering is made of several subjects. I already know much things that probably you don't know, so don't underestimate people's knowledge if you don't know them!
I do not know what wich ASME code deals with this temperatures. Is this condenable?
I think that sometimes people spend more time in competing to know who is the best than in helping eachother.
Thank you JohnBreen for your advise! (It was the only good one)
I don't want to make some kind of enemies, but next time, think better when you spend your time in giving this answers.
RE: Pipe for negative temperatures
Your question was simply too broad. There are numerous materials that are ductile at your minimum design temperature. The appropriate one is based on other service conditions and overall cost.
If your service conditions support using carbon steel, you can select ASTM/ASME A-336 Grade 6. If not, you may have to choose another material; e.g., austenitic stainless, nickel base alloys, copper alloys, aluminum alloys, etc.
RE: Pipe for negative temperatures
Please review your Piping Classification Specification
below is example form www.pip.org
PN01SA0S03 - Piping Material Specification 1SA0S03 Class 150, 304/304L Stainless Steel, 0.000" C.A. Low Temperature Process
Paper Copy Price $50
Date: 12-05 (Complete Revision)
PN01SA0S04 - Piping Material Specification 1SA0S04 Class 150, 304/304L Stainless Steel, 0.000" C.A. Cryogenic Process
Paper Copy Price $50
Date: 09-00
Leonard Stephen Thill
RE: Pipe for negative temperatures
In fact i've taken a look already to ASME B31.3 after the last reply and advice by JohnBreen.
I founded that 304L(Class 300) or 316L (Class 300) fit to my conditions.
The problem of the 150 Classes mentioned by LSThill, is that they only support design pressures until aprox. 15 bar.
thank you both anyway!
RE: Pipe for negative temperatures
I apologize for my "rant". I have listed several publications that will help direct you toward information regarding piping design at:
thread378-189629: Basics of pipe stress analysis
Look at the listed publications and you will find that some are available at no cost. This one may be very useful to you:
A companion document for use with the B31.3 Code (also look around this same site for other useful guides)
http:
Regards, John.
RE: Pipe for negative temperatures
below is 300 ClassL
PN03SA0S03 - Piping Material Specification 3SA0S03 Class 300, 304/304L Stainless Steel, 0.000" C.A. Low Temperature Process
Paper Copy Price $50
Date: 11-06 (Complete Revision)
PN03SA0S04 - Piping Material Specification 3SA0S04 Class 300, 304/304L Stainless Steel, 0.000" C.A. Cryogenic Process
Paper Copy Price $50
Date: 09-00 | 02-01 (Technical Correction)
Leonard Stephen Thill
RE: Pipe for negative temperatures
Please learn how to spell not: LSTgill,
L. S. Thill
Leonard Stephen Thill
RE: Pipe for negative temperatures
thanks for post. It was very helpful!
I have many many books regarding piping design, but i only use them when i have something to solve specificly, because my area is more thermodynamics...so...
LSThill,
Sorry for the mistake.
I already have the ASME specifications.
Thanks