Apparatus for detecting leaks in fuel dispensing systems

Patent · Tue Jul 21 00:00:00 EDT 1992

OSTI ID:6984289

Wood, L C; Gann, D A

This patent describes a method of detecting leakage in a liquid dispensing system which pumps the liquid from an underground tank, through a conduit to a control housing having an inlet chamber and an outlet chamber separated by a check valve, and from the outlet chamber to a flow line leading to a surface mounted dispenser. It comprises inserting a diverter into the outlet chamber, providing the diverter with a diverting passage leading from the upstream portion of the outlet chamber to the downstream portion of the outlet chamber; mounting a valve into the diverting passage; mounting an upstream pressure gage to the diverting passage upstream of the valve and a downstream pressure gage to the diverting passage downstream of the valve; then actuating the pump while the valve is open; closing the valve, turning off the pump and monitoring the pressure in the upstream portion of the outlet chamber with the upstream pressure gage, and monitoring the pressure in the flow line with the downstream pressure gage.

• Assignee: NOV; NOV-92-045069; EDB-92-169908
• Patent Number(s): US 5131262; A
• Application Number: PPN: US 7-694642
• OSTI ID: 6984289
• Resource Relation: Patent File Date: 2 May 1991
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
42 ENGINEERING
PETROLEUM
TANKS
UNDERGROUND STORAGE
LEAK DETECTORS
SAFETY ANALYSIS
LIQUIDS
PRESSURE GAGES
VALVES
CONTAINERS
CONTROL EQUIPMENT
ENERGY SOURCES
EQUIPMENT
FLOW REGULATORS
FLUIDS
FOSSIL FUELS
FUELS
MEASURING INSTRUMENTS
STORAGE
022000* - Petroleum- Transport
Handling
& Storage
420205 - Engineering- Transport & Storage Facilities- (1980-)
020600 - Petroleum- Health & Safety