Pipe Stress Engineering

[LSThill]

DSB123 (Mechanical)

Reference to L.C. Peng's new book, "Pipe Stress Engineering"
your posting 19 jul 09 5:18 Code Stress Requirements

Please {DSB123 (Mechanical)}do you have any additional information on your question????

I have a question. I have just been reading the section on Code Stress Requirements and in particular the paragraph on Page 123 with some interest. The paragraph seems to say that to calculate the displacement stress range Se you have to calculate the stress range due to thermal effects (including any anchor displacements) and then add the amplitude of the stress range calculated due to seismic anchor movements. If this combined stress is greater than the stress range due to seismic anchor movements then this should be compared with the Code Sa value. If not then the stress range due to the seismic anchor movements should be compared with the Code Sa.

There is no implicit mention of this within the Code as far as I can see. Is this paragraph correct and aligned with the Code?

Stephen Thill

 

[DSB123]

LS Thill,
Apart from the usual superb "cut and Paste" effort you seem to have lost me with this one. Can you re-phase question/query in english.

 

[StevenHPerry]

Depends on what Code you're talking about. I don't think Seismic Anchor Movements are included explicitly in B31.1 or B31.3.

Apparently the Japanese code "KHK" does include SAM, according to the help file from the pipe stress program I use. Section III also turned up in my search so maybe there's a requirement there too.

- Steve Perry

http://www.linkedin.com/in/stevenhperry

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