I have concerns regarding the estimation of nozzle and flange thickness under hydrotest conditions. A 30" flange with a Sch. 10S (7.92 mm) wall thickness was flagged because the nozzle assembly failed under hydrostatic test stresses. To mitigate this issue, I increased the nozzle neck thickness...
when I add the option to check saddle plate stress, Base plate thickness increases a lot. can anyone explain the effect of checking saddle plate stress and whether it is mandatory or optional?
A closed drain drum having a 2" nozzle with blind flange RF.
Should I use the UG-34 calculations and include the corrosion allowance of the vessel to the flange thickness? or use the typical standard blind flange with a suitable rating without considering corrosion allowance?
we already...
In compress,
After choosing class 150 , compress send the message attached , IMPACT TEST IS MANDATORY AS PER UHA (d)3. but when I change the class to 300 impact test is not required.
I have the same message when I add external loads and increase nozzle projection.
Can Anyone explain why?
nozzle...
How can you differentiate between an Sour Service with Lethal Service?
All Lethal Service requires PWHT and 100% RT for butt welds for Pressure Parts.
Do all Sour Service are Lethal in Nature? If not what is the requirements of sour services(non lethal) according to ASME VIII-Div1.
the fabrication period is too short.So we need to use a blind flange instead of UG-34 cover for quick supply.but we had a doubt that the blind flange can't has opening for nozzles because it doesn't meet the requirements of table 6 in B16.5 .
I already used a UG-34 cover in design which worked...
When we ask the software company about the 9.02mm min.thickness. They told us that they add corrosion allowance after taking the lesser of (1.4x tn & hub thickness)!.this issue happens only when adding slip on flange to any pipe size with sch.160. If we use sch.80 or 40 it will has no deficiency
the opening in the blind flange is for nozzles center and off center. not tapered hole as table 6 recommends.
so if the opening is for nozzles i can't replace the UG-34 cover in design with blind flange in fabrication process?
In compress,
Using slip on flange in 2" pipe sch.160 will lead to a deficiency in external fillet weld.
" UW-21: External fillet leg minimum (9.02 mm) is greater than the flange hub thickness (7.87 mm) " this message is shown during code calculation. but in UW-21 external fillet " X min = the...
Since compress does not allow attaching any nozzles (center or off center) to ASME B16.5 blind flange.
Can I do the calculation with UG-34 cover to easily attach nozzles and in drawings replace it with Standard blind flange?
I am designing a pressure vessel using compress software .the PV is 24" OD and has a bolted cover.
we want to use standard slip on flange & blind flange but we need to make an opening in the blind and we can't do it in compress.
1) can we use a UG-34 cover with the same dimensions of standard...
