Hello XL83NL,
Thank you very much for your reply.
To answer your question conserning application :
We design and build complete (steam cycle) power plants up to 100MW max mainly in Europe. The piping ranges from main steam piping CAT III (ex: DN350 (14") 68Barg 450°C) to large bore >2m (78")...
Hello,
I'm working for an EPC contrcator based in Europe and we design and construct piping according to PED and EN13480 code requirements.
Besides my job as a pipe stress engineer, and i'm also tasked with setting up the piping specifications for our projects.
When we request a quotation for...
Hello,
Thank you for the replies. I have checked table 4.1 and creep starts already at 343°C for the material concerned.
I have requested a load history diagram from our client (pressure and temperature, number of shut downs and start ups, etc...) but this is not available.
API 579-1 FFS...
Hello,
A FFS service level-3 assessment of a corroded ASME B16.9 BW TEE needs to be performed for general metal loss.
The orginal piping code is ASME B31.1
The material of the piping system is A106Gr B with a design pressure of 50Barg and a design temperature of 410°C.
1st question : is a new...
Thank you very much for your answer, this makes completely sense now.
Indeed, we can calculate Pm stresses by hand.
I should have known this answer, it was lingering in the back of my head but by reading your post the pieces of the puzzle fall togheter.
Best regards,
JVT_Stress
Hello,
Concerning classification of stresses according to ASME VIII div2 part 5.6 "Supplemental requirements for stress classification in nozzle necks", I have read this part 5.6 multiple times but but i'm still find this part very confusing.
When i model nozzles in my FEA software, and...
Hello all,
Thank you all very much for the advise.
After reading the code once more again, turns out i was to harsh in my judgement of the existing design.
I had forgotten about the factor of 0.88xBeta in table 5.5 of ASME VIII div2 part5.
B*(P+D)
0.88*B*(P+D+T)
(no other design load cases...
Thank you very much IdanPV & TGS4 for the quick response and clarification, the use of Beta = 3.5 for protection against plastic collapse is clear for me now.
What about protection from plastic collapse due to buckling, if my interpretation of Appendix 46-4(c)(3) "design margin of the...
Hello,
I'm new to eng-tips, but have been reading the posts on this B&PV forum a lot in the past when i got stuck on a problem.
Our client wants to make modifications on an existing large bore steam duct (OD 2820mm WT=10mm), the duct has been designed and constructed according to ASME VIII div...
Hello,
Beta for elastic-plastic analysis for protection against plastic collapse is clearly stated in Appendix 46.
However, related to demonstrating protection against collapse from buckling, ASME VIII div 1 Appendix 46-4(c)(3) states :
"When demonstrating protection against collapse from...
