Hi All,
I am relative new to Storage tanks. Why does API-650 Para P 3.3 limits local primary membrane stress and local bending stress to 1.1 Sd while allowing a higher limit of 1.5 Sd for membrane stress. Shouldn't it be the other way round. In pressure vessel we usually limit general primary...
Hello Code experts,
I am not able to find information on why SA-334 Gr 6 is not permitted for Sec VIII Div 2 applications. I read notes G24 T1 W6 , W12 , W14 of Part II D written against SA-334-6 for clues but I did not find anything substantial. Can some of you who know things help me here...
HI ,
This is theoretical question.
A vessel manufactured per Sec VIII Div 1 includes the vessel body, nozzles and their flanges.
Does ASME code para U-1(e)(1)(a) permits a vessel manufacturer to limit the geometric scope of Div 1 to weld joint between Nozzle and Flange ?
Can he exclude the...
Per general understanding of fracture mechanics, components subjected to tensile stresses are considered susceptible to brittle fracture. This understanding was reinforced by note (2) of Fig UCS-66.2 which stated that only those loads resulting in " general primary tensile stress " shall be used...
I do not know if its only me noticing this but I have some confusion regarding assigning SA-516 plates to Curve C or Curve D of fig UCS-66,Sec VIII Div 1.
Let us assume we have a SA-516 Gr 65 plate.
If the plate is not normalized it will fall under Curve B. This is clear.
If the plate is...
NBIC state that alteration and repair shall be according to the ASME code and edition "most applicable" to the work planned.
1) How do we decide the term " most applicable ".
2) If suppose the vessel is constructed in the 1960's. Can we run a code calculation with the latest edition of...
I have two queries. One specific and the other general.
Specific Query : -
In Appendix 2 of ASME Sec 8 Div 1 there is table of recommended gasket width. I have attached a snap shot. I want to know how do I interpret the word recommended. Does it mean mandatory or it's optional.
General...
Hi All,
I am trying to understand the equation used in Zick Paper on Saddle Analysis of Horizontal vessel. The book Process equipment design by Brownell and Young has a chapter devoted to Saddle analysis. I will copy paste the portion where I am facing a problem.
The weight of the head is...
I have some confusion in interpreting the requirement of Certifying Engineer specified in Anexure 2-J of Sec VIII Div 2 Ed 2019. I am specifically asking this for the requirement of certifying the UDS.
I can understand from para 2-J-3-2(b) that the UDS Certifying Engineer shall demonstrate...
UG-44(b) or code case 2901 has increased the design margin of standard flanges. Now we can increase the flange rated pressure by a factor ( 1 + Fm ) before we compare it with equivalent Pressure.
However the note (b) of Table UG-44-1 suggests an appropriate reduction in Moment factor (Fm) before...
