Nowhere do I see a hard requirement being put forth.
In the conversation with the project team I see a lot of personal opinion, and people hiding from making a decision. If there are regulations dictating requirements for safe operation and that a flexibility analysis is required, by all means...
See, that's the bit I'm getting hung up on. Its been operating for 40+ years..... The code specifically says I can replace existing designs with successful service history. Why the additional requirement?
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Biginch, your response leads me to the following two questions.
1) B31.8 833.7 invokes no requirement that a previous analysis was performed. Merely "duplicates a system with a sucessfull service record". Where does the requirement for an analysis come from?
2) B31.8 does not use the word...
Hello All,
If I replace the piping in aa B31.8 compressor station with an exact duplicate of what is currently installed, do I need to perform an new pipe stress analysis?
The reciprocating compressors at this station have been in operation for more than 40 years and the decision has been made...
Get with your company Lawer Immediatly.
Have all you transmittals ready as well as a copy of the altered documents, and if possible an email from the superintendant on the matter.
Both you and your place of work are sitting on a huge liability.
After this is in the lawers capable hands (this...
When perfoming fatuige analysis in accordance with ASME Section VIII Div 2 we always use FEA. Depending on your vessel and geometry this can become quite the daunting task, especicially if you run into problems.
A question properly stated is a problem half solved.
Always remember, free advice...
Read Appendix P carfully.
Appendix P is for use when performing a computer analysis. As AutoPIPE is a computer analysis it falls under the requirements of appendix P.
If you compare the equations modified in appendix P you will see where the differances are and how they impact what you are...
I would suggest calling the supplier that made this statment.
This way you have accurate information straight from the horses mouth.
Just my two cents worth.
A question properly stated is a problem half solved.
Always remember, free advice is worth exactly what you pay for it...
Just out of Curiosity, what is thier basis of rejection?
Did they have any contractual requirements on the matter?
It seems to me that would be an expensive fix that you are very likely to have reoccurances on. I would fight this issue to the death if it happened to me.
Just my two cents...
Any Word?
A question properly stated is a problem half solved.
Always remember, free advice is worth exactly what you pay for it!
http://www.ap-dynamics.ab.ca/
Use the calculation for thread engagement from ASME D1.1.
A question properly stated is a problem half solved.
Always remember, free advice is worth exactly what you pay for it!
http://www.ap-dynamics.ab.ca/
Follow racookpe1978's advice, this will answer your question and with any luck your understanding of the issue will increase.
A question properly stated is a problem half solved.
Always remember, free advice is worth exactly what you pay for it!
http://www.ap-dynamics.ab.ca/
Ok, this clarifies matters a bit (I have attached a sketch of what you appear to have)
Here is how I would procede.
Hello Mr. Owner, the butt welds have all passed radiograpgy, Here are the prints. Please approve.
If Mr. Owner rejects the welds based on the indications shown within the cladd...
For starters, the code with the aceptance criteria you are working to is needed. Are you talking BPVC? API? Maybe a foriegn to the US application?
I'm sorry to say, but I suspect you are in grey area here. The safest thing to do would have been to do your flange to pipe weld first, then done...
Thats a right sticky wicket.
A job is a job, and I have personally never been too proud to take an offer when nothing else was available.
That being said, I spent every non-work hour finding something better. Took a while but in the meantime I kept my head above the water.
It's always tough...
I would be very interested to know what document said this and the basis for which this direction has been given.
A question properly stated is a problem half solved.
Always remember, free advice is worth exactly what you pay for it!
http://www.ap-dynamics.ab.ca/
1) 3G and 4G are not enough, to qualify for the "All" position criteria for pipe over 24" your welders need to be 2G, 3G, and 4G qualified.
2) The dual listing requirement are such that multiple qualifications are not neccessary. The intent is to qualitfy on what you plan to be welding. In my...
From the look of it it appears you need both procedure and welder qualifications for these welds. This is not the end of the world.
First look at your welding process and determing the thickness range you qualify for.
Once you have that piece of information select out a piece of pipe with wall...
What is your code of construction?
My experience has been in AWS D1.1 and ASME section IX codes.
If either of these codes apply, on this matter I would side with your inspector. Although I can see your argument and why you are making it, A 3G and 4G weld qualification is not representative of...
Thanks for the notice!
I will be updating my library today.
A question properly stated is a problem half solved.
Always remember, free advice is worth exactly what you pay for it!
http://www.ap-dynamics.ab.ca/
