Resource Help!

[bonkers]

ASME BPVC Sect. VIII Div. 1 Appendix 1-5 (g) states that conical sections (cone-to-cylinder junction) with a half-apex angle greater than 30 degrees may be used if the design is based on special analysis, such as the beam-on-elastic foundation analysis of Tomoshenko, Hetenyi, or Watts and Lang. Does anyone know where to find these resources and how it applies to vessel cylinders as opposed to a beam? I have an eccentric 36" x 16" cone reducer 24" long with an angle of 39.8 degrees which may or may not require reinforcement.

Thank you for your thoughts!
Bonkers

 

[TomBarsh]

See "Pressure Vessel Design Handbook", Henry Bednar, Section 8.6.

Other references are available too. Get ready for some complex calculating.

 

[SnTMan]

My thought would be to stretch your cone

Regards,

Mike

 

[bonkers]

Thanks guys, good suggestions. I will research the PV Design Handbook but I don't like complex calculating, just the ordinary kind. My original design to the client did have a "stretched" cone of 34 11/16" with a 30 degree angle. The client advised that he has bought a cone and it was a "standard" 24" size. I didn't know that these were standard available components. I told him that I would inquire to see if I can determine if he can use it. Thus, my request for a resource.

Thanks,
Going Bonkers

 

[TomBarsh]

Is this a standard 24" pipe reducer? Produced to ASME B16.9 pipe fittings standard? If so, then simply use the rules of UG-44 to rate the reducer to same MAWP as for straight pipe of same schedule. Easy.

 

[bonkers]

Tom,

This is suposed to be a straight wall eccentric cone reducer without any "knuckle " radius for PV shell. Material SA-516 70N, 1" thick. Not pipe.

-Bonkers

 

[SnTMan]

bonkers, did the client get a Partial Data Report with his cone? This is almost certainly NOT a standard part.

Regards,

Mike

 

[SnTMan]

Would add, if it IS a standard part the manufacturer should provide a rating and documentation.