Usually a lip width of 19 to 25 mm is enough for carrying out NDE of Lip to Shell butt weld. Refer to Fig UW-16.1 f1 to f4 for guidance.
Since you already aware that lip region should be verified for forging material, I won't speak much on this.
People treat this differently depending on...
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...
I would be interested to know the construction details. UW-13.2 is for welding flat plates. How can a flat plate have an angle less than or more than 90° ??.
Classifying it as a cone would be more appropriate.
I think instead of corner joint you can classify it as a category B , angle joint (...
I had asked the same query to compress about 2 years back. They replied that compress assumes shell side and tubeside hydrotest is carried out separately. ie tubes are not present when shell side hydrotest is carried. Hence they write NI in their report.
Per my opinion you should include the...
Its appropriate if you ask this to your software support people. I do not use PVLite hence I am only guessing this.
In a radial nozzle you can imagine the fillet weld shape as a right angled triangle. In an inclined nozzle or a tangential nozzle the shape of weld can be oblique triangle. I can...
Speaking from my experience, end users are hesitant to define a service as " lethal " . Maybe they run into some jurisdiction problems and legal liability if they use the term " Lethal " . However they define all the requirements usually expected with lethal service ( PWHT , Extra NDE's etc ) in...
Thanks for your time and reply @TSG4.
I thought SA-334 Gr 6 might not be meeting certain technical requirements for the Section II committee to exclude it from Div 2 , class 2 construction.
Strangely I am not finding any resources on this topic on the internet. Perhaps I should dig more on...
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...
@Mechengineer
For a cylinder to hemi-head joint
I agree with you that the transition piece is actually a part of cylinder and hence should be treated as a cylinder. What I do not agree is that the thickness of small end of the transition should be calculated from longitudinal stress of cylinder...
Not necessarily FEA. There are some good reference and procedures given in Appendix 4 of ASME Sec VIII Div 2 2004 edition for evaluating discontinuity stress. Derivation of all code formulas are given in Handbooks from Authors like Bednar , Brownell and Young etc. Please read them and you would...
The method of area replacement is like a thumb rule adopted for Nozzle reinforcement. It is assumed that if you apply that thumb rule the stresses at the nozzle junction are within limits. You should not apply the same thumb rule for Shell to Flat cover junction. The geometry is different here...
Nowadays software are very user friendly than even a non engineering professional with some common sense can operate it. Hence learning a software should not be your priority.
Before you learn to operate any software you must learn basics of static equipment and piping design. This is more...
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...
You can enter the local shell thk as insert plate thickness near the bottom left corner of the nozzle design dialogue box. I could not find any input for the diameter of insert place. For that I suggest you enter the reinforcement limit ( bottom right corner ) equal to diameter of insert plate...
