Definition of the boundaries of the pressure pipeline connected to the mechanical pump
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For example, a pressure vessel is connected to a centrifugal pump, and from the outlet of the centrifugal pump, it goes to the next pressure vessel; pipes are used to connect these components. The inlet of the pump is equipped with filters, while its outlet is fitted with pressure gauges, check valves, and other types of valves. Is then the pipeline between the pump outlet and the valve a pressure pipeline, and is the pressure gauge classified as a safety accessory?
To the first welding joint or flange of the equipment
Go and check the definition and classification of pressure pipelines
What you’ve provided is too general; it depends on the specific properties of the medium and the pressure. It’s rare to not have a pipe property table? A quick look will show whether it belongs to pressure pipelines or not.
It depends on the pipeline characteristic table provided in the design, or on the definition of pressure pipelines for classification