Steam pipe Pressure rating
Steam pipe Pressure rating
(OP)
I am wanting to use Sch 10s stainless steel pipe for a steam system. Can anyone give me some insight for where I might find a Temperature and Pressure chart that would include 200 psig steam or about 400 deg F?
Thanks.
Thanks.





RE: Steam pipe Pressure rating
A=additional thickness for corrsion and/or end preping (threading or any process that thins the wall) See page 16 of the ASME B31.1-2001 code. (You did not state what type of stnls stl or size pipe you are using.)I used A312 TP304 which has an allowable of 11000 psi @ 400F P=2*11000*(.120-.01)/4.5-2*.4*(.120-.01) P=538psi, Remember this needs to be adjusted for manufacturing tolerance of 12.5%. I hope this helps you to be able to size other pipe walls.
RE: Steam pipe Pressure rating
You made the correct assumptions about material and pipe size.
This helps alot.
RE: Steam pipe Pressure rating
This isn't a negative comment against buddy01's response (it seems to be well laid out though I don't do these calcs) but from your point of view, if something happens, saying 'well, someone off the Internet said it was okay' is not going to satisfy very many people.
This just doesn't sit right with me. I know running the calc(s) from the appropriate code isn't rocket science but we are talking about steam at 200 psig, Eng-Tips isn't the correct forum to be 'okaying' these type of questions IMO.
RE: Steam pipe Pressure rating
You are right on target with your comment and I couldn't agree with you more. The is a forum where we can talk, not dispense advice. I have the same concerns as you when I read it, buddy01 gave a great discussion, but it should not be construed as engineering advice.
BobPE
RE: Steam pipe Pressure rating
RE: Steam pipe Pressure rating
Thanks for all of the additional advice and concern.
RE: Steam pipe Pressure rating
You are "right on" with your observations about advice and information given on this forum.
I feel that it is appropriate to point out governing Codes,standards, books, texts and websites, but an actual calculation or soulution is usually a bad idea.
Leading someone in the right direction is much more useful than doing actual engineering analysis online ( Also much less risky....)
Performing analysis and problem solving online only leads to abuse and disrespect for the engineer(s) posting answers (Its kinda like trying to be nice to an ungrateful wife...)
I would like the comments of others on this issue...
MJC
RE: Steam pipe Pressure rating
Why do I feel like the back of my neck is burning?
RE: Steam pipe Pressure rating
I agree with you for piping in the powerhouse and on the boiler, but in operating plants B31.3 seems to be the most common.
RE: Steam pipe Pressure rating
RE: Steam pipe Pressure rating
You have stated much better than my attempt, although I have not seen B31.1 used with compressed air.
By operating plants I meant to have indicated process plants. The transition from 31.1 to 31.3 is an engineering call. That we agree upon.
Thanks,