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B31.7 set up a model for a B31.7 (yep, that's right - class 1) analysi

B31.7 set up a model for a B31.7 (yep, that's right - class 1) analysi

B31.7 set up a model for a B31.7 (yep, that's right - class 1) analysi

(OP)
John Breen

Reference to:
PIPESTRESS program by DST Computer Services
thread378-124519: PIPESTRESS program by DST Computer Services

How is YOUR work in process to set up a model for a B31.7 (yep, that's right - class 1) analysis and I could use some guidance.

L S THILL

RE: B31.7 set up a model for a B31.7 (yep, that's right - class 1) analysi

Hello Mr. Thill,

Good luck - the DST PIPESTRESS software is THE MOST DIFFICULT software that I have ever had to use and I have been using pipe stress analysis since 1960 (the Navy Mare Island MEC-21 program with punched cards).  I worked with the PIPESTRESS software for about 6 months in 2005 and I have not used it since.  I have been told that MOST of the engineers using this software use a pre-processor that makes it much easier to use - I do not remember the name of the pre-processor but I suppose you can google to find it.  You absolutely MUST have the (voluminous) user's manual to be able to work with this software - the word "arcane" come to mind.  It uses the "key word followed by value" type of input, EG, for sustained pressure and weight:

LCAS CA=10 RF=11 PR=1 SS=0 TY=3 EC=0 EQ=0
     TI='Weight (DW + DW) + PRESS'

Of course the pipe properties and material properties had to be described in other "sections" of the input.

Relying upon my not very accurate memory, I seem to recall that all the loading cases were set up under the LCAS, RCAS and (for combinations) the CCAS headings.  Stress combinations are described under the CSTR heading.

I found that there was a person in the USA (perhaps Michigan) who provided support via telephone and FAX under contract with DST.  He was VERY helpful and without him I would not have been able to finsih the project.  Sorry that I could not provide better help.

Regards, John

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