Reduce pressure of a pipeline temporarily
Reduce pressure of a pipeline temporarily
(OP)
Dear all,
I’m working for an oil and gas operator, and I need to define the magnitude of the operational pressure I have to reduce because some dents haven’t been repair.
DOT and ASME B31.4 establish a reduction of the operational pressure to 80% of the maximum operational pressure recorded in recent history, but I have two questions regarding this concept:
1.How long is recent history, my pipeline has 30 years of service, and I have records from at least 10 years back from now?
2.For how long time should this maximum operational pressure had to be maintained in the SCADA records, 1 hours, 4 hours?
Thanks all





RE: Reduce pressure of a pipeline temporarily
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RE: Reduce pressure of a pipeline temporarily
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way
RE: Reduce pressure of a pipeline temporarily
B31.4 requires minimum hydrotest hold times of 4 hours, of which, if not offshore or near populated areas, can be conducted using product in the pipeline as the test medium.
I hate Windowz 8!!!!
RE: Reduce pressure of a pipeline temporarily
I hate Windowz 8!!!!
RE: Reduce pressure of a pipeline temporarily