Far better to go for a rod hung can with adequate swing angle, just because somebody will sell you something does not mean you should always buy it.....
Regards,
XHPIPE
Well all in all this thread shows just how confusing this subject is.
Some food for thought:
B31.1 is discussing a steam relief where the fluid (steam) is expansive as it changes state. I would expect its behavior as it comes out the end of either a straight or beveled end pipe to vary...
So what is it about words like approximate or recommended that make people commonly jump to a mandatory shall?????
I promise to vote negative on any B31.3 ballot that takes the word approximate out of the gap requirement. There is no need to make more out of this requirement than what is...
Some points to consider can be found at ....
http://www.coade.com/newsletters/jul03.pdf
http://www.coade.com/newsletters/feb02.pdf
And then read thru the online help available in the program itself.
An important consideration is the krate of the supports, and the steel members the restraints...
Well said CRG!!!!!!
I personally feel comfortable with my own work at 99.9% somebody else’s work that I have not reviewed is an entirely different matter!!!!
Interestingly if you ask some members of the committee when is a line overstressed (this question arose in recent meeting I was in)...
The current edition of of B31.3 does not and has never adressed operating loads. Neither does B31.1.
The new edition of B31.3 (2004) which may be available in March will offer a non-mandatory approach towards dealing with operational loads/stresses.
The codes are based upon a paper authored by...
P11 is still in use albeit far less than in the past. The newer alloys such as P91 are all the rage, but my own personal opinion is that the weld/fab difficulties associated with this alloy may its application problematic especially if the the fab shop is selected soley on price!
P91 has...
In theory if all is correct as far as the basis of the analysis is concerned an interaction of less than 100% of the code allowed stresses is all that is required from the world of the beam element models point of view.
However a couple of things come to my mind....
The code is concerned with...
There will be options associated with the WSRF i.e., if you have test data available for the filler you use that shows it holds up well at creep then you can adjust the factor accordingly.
The bottom ine is some people were not using a filler metal that shared the same and or similiar creep...
See 302.3.2 in B31.3
This can give you a design stress but I repeat the material itself may not be manufactured to a level that would allow it to be used as presssure pipe in other words a derived S value doesnt turn a sows ear into a silk purse.
Proceed cautiously.....
Regards,
XHPIPE
Cable Conduit??????
The materials listed by ASME have been deemed useful in pressure piping systems, pressure vessels, boilers etc.
To use a material which is rated as electrical conduit rather than pressure retaining material is not a wise idea that anuone would sanction (especially at...
Hmmm,
Well B31.3 offers you a methodology of developing a S value for a non-listed material. You could use this approach I suppose but the S value and code are married to each other and I'm still not sure what if any code is applicable to what your doing.
Using the B31.3 approach for something...
