Vacuum on Pipe
Vacuum on Pipe
(OP)
For large diameter pipe under full vacuum (FV) attached to pressure vessel, I always check using ASME VIII, Div 1 external pressure curves.
This may be conservative but are there other ways of verifying the vacuum loads??
This may be conservative but are there other ways of verifying the vacuum loads??





RE: Vacuum on Pipe
local regulations/standards?
any requirement from the insurance company that requires the parts to be certified by ASME?
If there is no requirement whatsoever... the pipe can be verified with the formulas for pipes under external pressure in text books like timoshenko's, roark & young etc...
HTH
saludos.
a.
RE: Vacuum on Pipe
RE: Vacuum on Pipe
Steve Braune
Tank Industry Consultants
www.tankindustry.com
RE: Vacuum on Pipe
Steve Braune
Tank Industry Consultants
www.tankindustry.com
RE: Vacuum on Pipe
Pages 124 to 137
Section 6.2 - Design of Steel Liners for External Pressure.
This reference is for steel tunnel liners concreted into rock.
Figure 5.1 (page 116) indicates critical collapse pressure vs ring deflection for a perfect circle & a buried pipe condition.
See also AWWA M11 (Steel pipe - a guide for design & installation) for more info.
Barry