No Access to ASME Sec. 8, need Allowable Stresses...
No Access to ASME Sec. 8, need Allowable Stresses...
(OP)
Hi,
Just starting out as an Engineer... I don't have access to all ASME Sec 8 published to date and I needed allowable stresses for the following materials...
SA-516 Gr 70 built 1998 Temp. -20 to 100 F
SA-240 Gr 304 built 1993 Temp. -94 F
SA-516 Gr 70 built 1974 Temp. less than 150 F
SA-515 Gr 70 built 1974 Temp. between 110 to 230 F
SA-106 Gr B built 1998 Temp. 100 F
I'd really appreciate any help....
Thanks
Just starting out as an Engineer... I don't have access to all ASME Sec 8 published to date and I needed allowable stresses for the following materials...
SA-516 Gr 70 built 1998 Temp. -20 to 100 F
SA-240 Gr 304 built 1993 Temp. -94 F
SA-516 Gr 70 built 1974 Temp. less than 150 F
SA-515 Gr 70 built 1974 Temp. between 110 to 230 F
SA-106 Gr B built 1998 Temp. 100 F
I'd really appreciate any help....
Thanks





RE: No Access to ASME Sec. 8, need Allowable Stresses...
RE: No Access to ASME Sec. 8, need Allowable Stresses...
Thanks mengnr, appriciate the help.... quick question though.... the code your referring to, when was it published ? .... I think I need the code published in 1992, or somewhere around that time, because thats when the vessel was built....
Once Again, Thanks
RE: No Access to ASME Sec. 8, need Allowable Stresses...
Why (what purpose) do you need stress tables for material 1992 edition?
curtis
RE: No Access to ASME Sec. 8, need Allowable Stresses...
-Christine
RE: No Access to ASME Sec. 8, need Allowable Stresses...
RE: No Access to ASME Sec. 8, need Allowable Stresses...
And prior to 1999, the allowable stress for SA-240 Gr. 304 at -20°F was 18.8 ksi, not 20.0 ksi.
-Christine
RE: No Access to ASME Sec. 8, need Allowable Stresses...
Thanks alot Christine74, that helps !
RE: No Access to ASME Sec. 8, need Allowable Stresses...
mengnr: No worries, appriciate the help.
RE: No Access to ASME Sec. 8, need Allowable Stresses...
curtis2004: To my understanding, SA metals in the US are made according to chemical compositions specified in the present ASME code, so if the metal was made a long time ago, they must have used the ASME code of that time.... and hence the allowable stresses would be different....
however, if the chemical compositions are the same, which seems to be the case for SA 516 Gr 70 at least, then the most recent ASME code will be correct as the only thing that changed was the design margin...
RE: No Access to ASME Sec. 8, need Allowable Stresses...
You didn't really say what your application is, but be aware that the ASME code not only gives allowable stresses, but specifies how those stresses are to be used. The calculated stresses actually used may be considerably higher or lower than the tabulated stresses based on the geometery and the application. Also, if you're evaluating existing vessels, there are other codes and standards applicable to them that may allow or restrict stresses at different levels from the design code.
RE: No Access to ASME Sec. 8, need Allowable Stresses...
JStephen: Thanks, that clears things out... The reason I needed those stress values is to evaluate pressure vessels currently in use... would other codes be applicable here ? If so, can you specify which ones, or do you need more informaiton ?
Thanks
Harris
RE: No Access to ASME Sec. 8, need Allowable Stresses...
What would you like to do with the vessel(what is the task)?
curtis
RE: No Access to ASME Sec. 8, need Allowable Stresses...
cutis,
The vessel is currently being used at a natural gas purification plant, I need to det'm remaining life..
RE: No Access to ASME Sec. 8, need Allowable Stresses...
API 510 Pressure Vessel Inspection Code: In-Service Inspection, Rating, Repair, and Alteration
API 579-1/ASME FFS-1 Fitness for Service
These reference others, but I would think they are the main men for your situation.
Cheers,
John
RE: No Access to ASME Sec. 8, need Allowable Stresses...
ASME Section VIII, Div 1/2/3 are construction codes. They set rules for design and fabrication of pressure vessels. When vessel comply with the code it will have "U" stamp and once the vessel leaves fab shop there ends jurisdiction of the code, because as I mention it is construction code.
As mentioned by JohnGP you need API 579-1/ASME FFS-1 Fitness for Service in order to determine remaining life of the vessel. Other relevant section of the code for this would be Section V, NDE.
Regards,
curtis