Design pressure of pipelines before and after the gas pressure regulator
Thread Content
Should the design pressures of the pipelines before and after the natural gas pressure regulator be the same? Due to the large diameter of the pipeline downstream of the pressure regulating valve, if it is designed based on the pressure before the valve, the valves would have to be very large, making installation difficult
They are generally different； Only the low pressure and those with low pressure drop have the same design pressure
It was found that standard DL-T 5024 states that \"the design pressure of the pipeline after the pressure regulator is the same as that of the pipeline before the pressure regulator.\" ”Is this setting intended to prevent the voltage regulator from failing and causing pressure surges in the pipeline behind it? The natural gas pressure drops from 4 MPa to 0.8 MPa; the pressure ratings of the pipes before and after are different, and it’s unclear where the boundary should be determined.
Voltage regulation failure is accompanied by emergency shutdown and safe discharge； The separation point is sometimes after the pressure regulating valve assembly; in most cases, it is after the pressure regulator. If a pressure regulating skid (box) is ordered, this skid functions as a piece of equipment, with high-pressure input and low-pressure output ； Do electrical codes also cover pipeline design?