Class 150 valve on Class 600 pipeline?
Class 150 valve on Class 600 pipeline?
(OP)
There is a pipeline and max. op. pressure is 90 (6 bar) psi.
Pipeline pressure class is class 600.
Would it be a problem to install Class 150 valve on this pipeline?
Would there be a liability problem?
Pipeline pressure class is class 600.
Would it be a problem to install Class 150 valve on this pipeline?
Would there be a liability problem?





RE: Class 150 valve on Class 600 pipeline?
So in essence yes, you are creating a potential liability in doing this and it doesn't sound like a good idea to me.
In any event pipelines are not rated by their fittings but have a bespoke design pressure <= the flange rating.
Your question and phrasing shows a worrying lack of knowledge about pressurised systems. If you get some of this wrong you kill people very easily. A #150 valve exposed to #600 full rated preassure will fall catastrophically.
More details would help.
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way
RE: Class 150 valve on Class 600 pipeline?
David Simpson, PE
MuleShoe Engineering
"Belief" is the acceptance of an hypotheses in the absence of data.
"Prejudice" is having an opinion not supported by the preponderance of the data.
"Knowledge" is only found through the accumulation and analysis of data.
The plural of anecdote is not "data"
RE: Class 150 valve on Class 600 pipeline?
If the max op pressure really is 6 bar and can't go higher then ok, with revised RV set point s etc, but this needs careful review.
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way
RE: Class 150 valve on Class 600 pipeline?
I considered all scenarios you mentioned but just wanted to write basic issue to get exact comments.
There are people very much experienced like you and always apprecicate your words and timing.
RE: Class 150 valve on Class 600 pipeline?
For the money you might save, is it worth doing all of the engineering that you would need to do to justify that what looks odd is actually correct? Or are you better off just getting the hefty valve and being done with it?