High cycle fatigue in piping
High cycle fatigue in piping
(OP)
Hello,
Is there any codes or documents that gives guidance how to evaluate high cycle fatigue in piping systems. What I'm after is a procedure that originates from the nominal beam stress range and through the use of stress indices gives the stress range to enter an applicable S-N curve.
Best Regards
Is there any codes or documents that gives guidance how to evaluate high cycle fatigue in piping systems. What I'm after is a procedure that originates from the nominal beam stress range and through the use of stress indices gives the stress range to enter an applicable S-N curve.
Best Regards





RE: High cycle fatigue in piping
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"Pumping accounts for 20% of the world's energy used by electric motors and 25-50% of the total electrical energy usage in certain industrial facilities."-DOE statistic (Note: Make that 99% for pipeline companies) http://virtualpipeline.spaces.live.com/
RE: High cycle fatigue in piping
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"Pumping accounts for 20% of the world's energy used by electric motors and 25-50% of the total electrical energy usage in certain industrial facilities."-DOE statistic (Note: Make that 99% for pipeline companies) http://virtualpipeline.spaces.live.com/
RE: High cycle fatigue in piping
Steve Jones
Materials & Corrosion Engineer
http://www.linkedin.com/pub/8/83b/b04
RE: High cycle fatigue in piping
C.S. design curves DNV F3, Div. 2 Structural Stress
RE: High cycle fatigue in piping
Especially LSThills first reply (on the 25th) was very helpful and informative. However that reply has vanished from the tread, how come?
Best regards
RE: High cycle fatigue in piping
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"Pumping accounts for 20% of the world's energy used by electric motors and 25-50% of the total electrical energy usage in certain industrial facilities."-DOE statistic (Note: Make that 99% for pipeline companies) http://virtualpipeline.spaces.live.com/
RE: High cycle fatigue in piping
BigInch (Petroleum) 29 Nov 09 19:09 Probably too much "advertising".
Just the correct source : ASME B31 COMMITTEE Code for Process Piping
ASME B31.3 Process Piping Design Appendix W Fatigue Analysis
Tony Paulin
William J. Koves, PhD P.E. ASME FELLOW
Glynn E. Woods
Ronald W. Haupt
L S THILL
RE: High cycle fatigue in piping
But you could just give the title and a link to where to buy it. 2 lines... if you wanted to. Know what I mean?
It wasn't me.
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"Pumping accounts for 20% of the world's energy used by electric motors and 25-50% of the total electrical energy usage in certain industrial facilities."-DOE statistic (Note: Make that 99% for pipeline companies) http://virtualpipeline.spaces.live.com/
RE: High cycle fatigue in piping
thread378-248080: Pipe Stress Engineering
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"Pumping accounts for 20% of the world's energy used by electric motors and 25-50% of the total electrical energy usage in certain industrial facilities."-DOE statistic (Note: Make that 99% for pipeline companies) http://virtualpipeline.spaces.live.com/
RE: High cycle fatigue in piping
However in Div 2 the structural stress is used. How is this obtained from a regular Pipe flexibility analysis? Are there stress indices available for common piping components?
Best Regards
RE: High cycle fatigue in piping
Chris PVP Paper CHICAGO 2008
ASK FOR CODE CASE ASAP TO:
APPENDIX W HIGH CYCLE FATIGUE ASSESMENT OF PIPING SYSTEMS (Draft 3/25/09) CONTACT ASME B31 COMMITTEE Code for Process Piping Tony PaulinWilliam J. Koves, PhD P.E. ASME FELLOW Glynn E. WoodsRonald W. Haupt
Please Read Additional information
RECOMMENDED PRACTICE DET NORSKE VERITAS DNV-RP-D101
STRUCTURAL ANALYSIS OF PIPING SYSTEMS
Recommended Practice DNV-RP-D101, October 2008
Page 41
APPENDIX J
FATIGUE CALCULATION EXAMPLE
The next two pages show an example on how fatigue calculations can be performed according to PD5500.
The purpose is only to show a format based on PD5500, Annex C, and PD5500 working example W.6.2.3.
Refer section 3.12.4 in this RP for a description of the piping being analysed.