Recent content by kremenco

Ho Friends, The value of the angle alpha in the following figure is given as less than 71.5 degrees in UW-9(c)(2). Can we assume that this angle can be any value between 0 deg and 71.5 deg? Or are there any other restictions. We normally provide this angle as 30 deg. Thank you in advance. Kind...

Definitely I want to do the evaluation of the flange as per the formula given in UG-44(b)(4) ; not the local stresses at the nozzle vessel intersection. My question is whether the formula is valid in my case as the flange material (aluminium alloy)it is not listed in ASME B16.5.

Hi, Thanks for the responses. I think I have not made myself very clear in the post above. The scenarion is that I am using Aluminium Weld Neck Flanges (1" NPS) on a pressure vessel. Since ASME B16.5 does not have Aluminium Flanges, I resort to code case 2905 that allows the use Aluminium...

Hi Friends, Is it acceptable to use the UG-44(b)(4) formula given below to confirm the pressure temperature rating of an aluminium pipe standard flanges allowed as per Code Case 2905? Thanks in advance. Ranjit

Thanks for the link. However, it does not have symbol for angle needle valves. Kind Regards, Ranjit

Hi Frineds, How is angle needle valves shown in P&IDs or any specific type of angle valves for that matter? Thanks Ranjit

Hi BEMPE16524, Thanks for your response. Regards, Ranjit

Hi All, The snip of Appendix-44 (i) is given below. In this context what is meant by "centroid of the ring"? Is it the centroid of the ring structural crosssection or centroid of the ring itself? What is an example of a structural discountinuity mentioned here? Is a longitudinal shell weld...

If you want cool down your sperical tank before introducing Liquid CO2 try to introduce gaseous nitrogen slowly at low temprature first to cool down the tank so that when the liquid CO2is introduced, there will not be any cold shock for the tank. You should have liquid relief valves on the tank...

Hi LittleInch, Thanks for your suggestions. Kind Regards,

Hi friends, We are trying to locate manufacturers who can supply sleeves (see the attached file) for the nozzles of mounded storage bullets as per EEMUA-190. If anyone here knows such manufacturers, plese guide me. Kind...

@r6155 and @JStephen, thanks a lot for the dierctions. Regards,

Dear Friends, Why is embedded length not a factor in calculating the size of pressure vessel anchor bolts? Is there a method to calculate required length of anchor bolt when the foundation is made of structural steel and not concrete? Kind Regards, Ranjit

@DriveMeNuts Yes, we are mainly concerned about the costs related addional inspection and tests. Will it be acceptable to conduct a leak test for the vacuum jacket in line with UG-99 (f)(2) in lieu of a hydrostatic test? @EdStainless There are safety heads on the vacuum jacket sized as per...

Cryogenic pressure vessels are double walled with outer jcakets fully enveloping the inner vessel. The annular space between the inner and outer vessels is fully vaccumized and filled with expanded perlite. In a normal case the external pressure on the jecket is 15 psig or less. As per Appendix-...