SU1492179A1 - Method of locating leakage in pipeline - Google Patents

Abstract

The invention relates to pipeline transport and can be used to determine the location of a leak in a pressure and non-pressure pipelines. Using the method of determining the location of a leak in a pipeline can increase sensitivity to minor defects and simplify the method. This is achieved by using air accumulation at the point of leakage of the pipeline filled with liquid, when a vacuum is created in it, and then measuring the amount of liquid displaced from the pipeline before the air accumulates in it.

Description

The invention relates to pipeline transport and can be used to determine the location of a leak in a pressure and non-pressure pipelines.

The purpose of the invention is to increase the sensitivity to small violations of the tightness of the pipeline and simplify the method.

The drawing shows a diagram of a method for determining the location of a pipeline leak.

The scheme contains the pipeline section 1, pumps 2 and 3, valves 4-6 and measuring device 7.

The method is implemented as follows.

In the fluid filled pipe 1 with the help of pump 2, when the valve 4 is open and valves 5 and 6 are closed, fluid pressure is above atmospheric pressure (pressure test pressure). In the event of a drop in fluid pressure

In the process of pressure testing, which indicates a leakage in the pipeline, the valve 4 is closed, the valve is opened. Using the pump 3, part of the fluid is pumped out of the pipeline section 1, and air accumulates at the leakage point due to its suction through the defect.

In order to realize the possibility of detecting minor pipeline defects (fistulas, micropores), it was determined that pressure reduction inside the pipeline section below atmospheric by pumping liquid from the damaged section should be carried out until the amount of pumped liquid is equal to the volume limited in the pipeline 4- 8 of its diameters. After that, the pumping of the liquid is stopped and the pumping of the liquid into the controlled area is carried out with the help of the pump 2.

(P

 with y

with

pipeline 1, providing an increase in fluid pressure above atmospheric pressure and discharge of liquid to the measuring device 7. The liquid is expelled from the pipeline section 1 to the measuring device 7 by pump 2 with the valve 6 closed and valves 4 and 5 open until the moment when liquid measuring device 7 according to air. At the time of the appearance of air by closing the valve 5, the outflow of fluid is stopped.

The volume V from the point of discharge of the liquid to the point of damage is determined by the volume V of the fluid discharged into the measuring device 7 and the known cross-sectional area S of the pipeline

V

5Thus, the method allows to detect defects in pipelines, both in pressure and pressureless using simple devices.

Claims (1)

and increase sensitivity to minor leakages. Invention Formula The method of determining the location of the violation of the tightness of the pipeline by registering the decrease in pressure in it in the process of hydraulic crimping, characterized in that in order to increase sensitivity to minor pipeline leakages and simplify the process, lower the fluid pressure below atmospheric by pumping a part of the fluid out of the monitored pipeline section, then increase the atmospheric pressure by supplying fluid at one end of the pipeline and ensure that it is drained at the opposite end the end until the occurrence of air in the draining liquid, over the cross-sectional area of the pipeline and the measured volume of the drained liquid, determine the distance from the point of discharge of the liquid to places of leakage.