Patent ID: 11920720
Assignee: SAUDI ARABIAN OIL COMPANY
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F  E | IPC E  F

Claim 6:
7. The water hammer mitigation system according to claim 6, wherein:
the first relief valve comprises a first biasing member operable to maintain the first relief valve in the closed configuration when a pressure differential across the relief device acting on the first closure member is below the first predetermined threshold pressure, and operable to move the first relief valve from the closed configuration to the first open configuration when the pressure differential across the relief device acting on the first closure member reaches the first predetermined threshold pressure; and
the second relief valve comprises a second biasing member operable to maintain the second relief valve in the closed configuration when a pressure differential across the relief device acting on the second closure member is below the second predetermined threshold pressure, and operable to move the second relief valve from the closed configuration to the second open configuration when the pressure differential across the relief device acting on the second closure member reaches the second predetermined threshold pressure,
wherein the pressure differential across the relief device acting on the first closure member corresponds to a surge pressure at the surge point on the main pipeline, and the pressure differential across the relief device acting on the second closure member corresponds to a vacuum pressure at the surge point on the main pipeline.