Continue to Site

Eng-Tips is the largest engineering community on the Internet

Intelligent Work Forums for Engineering Professionals

  • Congratulations SDETERS on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Calculating the allowable stress in creep range of 200000 hrs operation

Status
Not open for further replies.

senthil83

Mechanical
Jun 26, 2012
66
Dear all,

we had a requirement from customer to design the pressure vessels for 200000 hrs of operating life.

we have the materials using in the creep range, so how to calculate the allowable stress for ASME materials at 200000 hrs operation.

ASME Sec II D has 100 Favg% rupture stress at 100000 hrs operation, how to,extrapolated it to 200000 hrs?

best regards
senthilkumar.B
 
Replies continue below

Recommended for you

Senthilkumar,
All you need to do is to determine the rupture allowable stress corresponding to 200,000 hrs. Follow API RP 530 for guidance. First, determine the LMP which is a function of Temperature and Design life and then determining the rupture stress corresponding to the calculated LMP from the given curve.

GDD
Canada
 
Status
Not open for further replies.

Part and Inventory Search

Sponsor