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Greeting to everyone I have one flange where gasket is placed near flange id=1000mm with gasket width 13mm. Internal design pressure is 100 kg/cm2 & 150 deg c design temperature. Flange pcd is 1283 mm Later after procurement I come to know that gasket shall be placed always near to pcd for...

Thanks sntman I followed your suggestion. Pitch circle diameter, large hub thk & gasket od could reduce flange thk I choose to increase gasket od & now problem resolved

thread794-439534 Greetings to everyone I have come across in very strange situation I have reverse flange which was designed for grooved metal gasket having m & y value Now I am looking to qualify this flange for diaphragm gasket which is having m=0 & y =0 I was thinking that my flange...

Hello everyone i have some doubts related to hydro test pressure my first doubt is, does selection of ug99b or ug99c depends upon shop or field hydro test. i have understanding that selection does not depend upon whether we r performing shop or field hydro test. we can considered anyone in...

Hi guys I am using PVelite software for my design. when i am considering cone to cylinder shell junction as a line of support, my cone thickness is increasing very much. I understand that it is only due to moment of inertia requirement of junction. It is only our choice to choose junction...

Thanks guys for your kind response. I can consider circumferential stiffeners for cone which design is possible as per code. Can you suggest me any analytical method for flat head stiffeners design?

second figure in continuoushttps://files.engineering.com/getfile.aspx?folder=e1dd7891-acc1-4071-a781-7f7daf8702f8&file=Capture11.PNG

Hello everyone. I have cone with flat head closure. I need to place ring stiffener on flat head & axial stiffeners on cone section for external pressure. I am attaching figures for better understanding. I am not getting any clause for such stiffeners in ASME section viii div 1. please suggest...

@Geoff13, i have understood your point. Thank you all for your kind response. regards,

@Geoff13 Factor k1 is given in table UG-37 & required to calculate "tr" as mentioned in UG37(a)nomenclature. "tr" is required for reinforcement calculation so As you said, table UG-37 is used for reinforcing calculation. but similarly when we look 1-4(a) nomenclature of "L= inside crown...

@r6155 I have concern only for changes in ellipsoidal profile by changing ratio D/2h. regards,

Hello everyone. when we have different D/2h in ellipsoidal heads we have different crown radius by using table UG-37, sec viii div 1. So does we have different knuckle radius for different D/2h in ellipsoidal heads by using table 1-4.4 or table 1-4.4 is only applicable with appendix 1-4f(2)...

Thanks david for your kind response.

Hello everyone, I have following doubts in understanding UG39 & UG36 ASME section VIII div 1. 1. UG36 is applicable to flat heads or not. I have this doubt because it seems that UG36 is all about formed heads not about flat head. 2. UG39(a)stated that:"The rules in this paragraph apply to...

I was thinking same but was not sure. Thanks SnTMan for your kind response

Hello all, I have below one question that may be very silly but i am stuck to find the answer. "UW-16(f)(2) stated that:"(2) Fittings not exceeding NPS 3 (DN 80) shown on Figure UW-16.1, sketches (x), (y), (z), (aa), and (bb) may be attached by welds that are exempt from size requirements...

Thanks Geoff13 for your kind response. I think if we think about boiling of stored liquid then we will have to look the boiling point, heat transfer rate, exposed surfcace area, heating time and other points. I am not aware of the boiling point of 40% caustic solution but for pure caustic...

Thanks horacio. Thanks MJcronin. Its small size tank with MOC sa516gr60 with steam heating coil. From your answers i am sure for no need of emergency vents. Overflow & normal vent nozzles are already considered. Regards,

Hi friends, I need a help. I have to design a storage tank to store 40% caustic soda solution. My roof to shell joint is coming non frangible. So i think for emergency vents. But i understand that my stored product is non flammable so emergency vents are not required. There is also heating...

Thanks mk3223 for your kind response. Thanks HTURKAK for your kind response. @HTURKAK, actually required reinforcement can also be achieved from higher shell thk & RF pad. So if we have higher shell thickness or higher RF pad dimensions then is there any clause where we can consider lower...