Pipeline protection system

Details Pipeline protection system Pipeline protection system

2007-05-21

2011-11-08

Hepperle, Stephen M (Department: 3753)

Fluid handling

Line condition change responsive valves

Safety cut-off requiring reset

C137S599040, C137S599070, C137S601140, C137S870000, C137S883000

Reexamination Certificate

active

08051875

ABSTRACT:
A protection apparatus detects and reduces overpressure in a fluid pipeline. First and second pipeline valves are connected in series along the pipeline and are independently switchable between open and closed positions. A pressure transducer determines the fluid pressure in the pipeline at a point intermediate the first and second pipeline valves. A bypass line has a first end connected to the pipeline between the input end and the first pipeline valve and a second end connected to the pipeline between the first and second pipeline valves. A bypass valve is connected along the bypass line. A vent line is connected to the bypass line between the bypass valve and the second end of the bypass line. A vent valve is connected along the vent line.

REFERENCES:
patent: 4521221 (1985-06-01), Richter et al.
patent: 2004/0261856 (2004-12-01), Klaver et al.
patent: 2005/0199286 (2005-09-01), Appleford et al.
patent: 2401164 (2004-11-01), None
patent: WO 03/106888 (2003-12-01), None

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