LPG Flashing

From: <gautam>
Date: Wed Jan 05 2005 - 22:48:00 EST

Dear Friends,
Can I have some information about LPG flashing? How and when does it occur and how does it affect the pipe flow networks
Gautam wayse

• Christopher Wright <chrisw@skypoint.com> wrote:

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On Dec 28, 2004, at 11:37 PM, Umapathy, A wrote:

> For Static loading the Design factor of safety: 60%
of Yield stress is
> considered and for dynamic loading it would be 35%
  to have a life
> of 1 million cycles or more.

This is a bit over simplified becasue it depends greatly on the type of
construction and the service. The 60% number applies to AISC Code
design for working stress; oit's different for LRFD rules becasue the
design loads are factored upward. Neither figure applies to ASME piping
or pressure vessel code rules.

And just for cultural value, the safety factor is always greater than
1: it's the limiting stress or load divided by the maximum allowable
stress or load and it's not necessarily based on yield stress.

Christopher Wright P.E. |"They couldn't hit an elephant at
chrisw@skypoint.com | this distance" (last words of Gen.

...................................| John Sedgwick,

Spotsylvania 1864)
http://www.skypoint.com/~chrisw/

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