Can vessel over 20Mpa (3000psi) designed to ASME Div 1?
Can vessel over 20Mpa (3000psi) designed to ASME Div 1?
(OP)
I have a vessel which is designed to 38Mpa (5500psi), can I use ASME VIII Div 1? Div 1 states that above 20Mpa (3000psi) there is deviation from this code but looks like as long as it meet other requirement (say if the design pass Div 2 design) then it can still be designed to Div 1?
In addition my vessel have a flat end screw into shell (the case as Fig UG-34(q) in Div 1). Div 2 don't have the case for this, so even if I design to Div 2, I still need to refer back to Div 1? Or is this geometry not allowed for high pressure case?
Thanks in advance for your help!
In addition my vessel have a flat end screw into shell (the case as Fig UG-34(q) in Div 1). Div 2 don't have the case for this, so even if I design to Div 2, I still need to refer back to Div 1? Or is this geometry not allowed for high pressure case?
Thanks in advance for your help!





RE: Can vessel over 20Mpa (3000psi) designed to ASME Div 1?
I would agree with you that applying Code Case 2695 would likely suffice for a high-pressure design.
Your head detail, from Figure UG-34(q) appears to be similar to Table 4.6.1, Detail 9, except that there would be no retaining ring and the head itself is threaded-in. I have no experience with this detail in high pressure applications, but thtreaded connections are frequently used in very high pressure (80ksi and higher) applications, so...
RE: Can vessel over 20Mpa (3000psi) designed to ASME Div 1?