GB1311993A - Detecting leaks in pipelines - Google Patents

Detecting leaks in pipelines

Info

Publication number
GB1311993A
GB1311993A GB1912770A GB1912770A GB1311993A GB 1311993 A GB1311993 A GB 1311993A GB 1912770 A GB1912770 A GB 1912770A GB 1912770 A GB1912770 A GB 1912770A GB 1311993 A GB1311993 A GB 1311993A
Authority
GB
United Kingdom
Prior art keywords
leak
pressure
section
increase
monitoring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB1912770A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GEWERKSCHAFT BRIGITTA ERDGAS E
Siemens AG
Original Assignee
GEWERKSCHAFT BRIGITTA ERDGAS E
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE19691920398 external-priority patent/DE1920398C/en
Application filed by GEWERKSCHAFT BRIGITTA ERDGAS E, Siemens AG filed Critical GEWERKSCHAFT BRIGITTA ERDGAS E
Publication of GB1311993A publication Critical patent/GB1311993A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
    • G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
    • G01M3/2807—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes
    • G01M3/2815—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes using pressure measurements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L2101/00—Uses or applications of pigs or moles
    • F16L2101/30—Inspecting, measuring or testing

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Examining Or Testing Airtightness (AREA)

Abstract

1311993 Detecting leaks in pipe-lines SIEMENS A G 21 April 1970 [22 April 1969] 19127/70 Heading G1S A method of detecting leaks in a flow path along which a gas is flowing, comprising the step of monitoring the variation with respect to time of the difference between gas pressures at the ends of at least one zone of the flow path, the step of examining for an increase in said difference by at least a predetermined amount in a predetermined interval of time when a pressure at the downstream end of the zone is less than a pressure at the upstream end and the subsequent step of indicating that a leak has been detected if in the examining step such a pressure difference increase is detected. As a preliminary step, if a pressure increase in the direction of flow is found, examination is' made for a decrease in the increase of a predetermined magnitude within a predetermined time; if such is found then a leak is also indicated. In order to decrease the number of spurious leak conditions arising e. g. from random fluctuations in pressure or instrument errors being interpreted as leaks, a number of such zones are grouped into a monitoring section, and a leak condition is indicated for the section only when more than a certain proportion of zones within the section each indicate a leak condition. The zones within a monitoring section may overlap one another or be in series. A plurality of overlapping monitoring sections in a pipe-line may similarly be inter-related so that leak indications are given by a section only when adjacent overlapping sections agree. Similarly by determining the pressure pattern in the pipe-line at regular intervals, and comparing successive readings, leak indications will only be given if the trend in time is to indicate a leak in a particular section. An over-all increase or decrease in pressure will prevent particular variations in pressure difference being indicated as leaks.
GB1912770A 1969-04-22 1970-04-21 Detecting leaks in pipelines Expired GB1311993A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691920398 DE1920398C (en) 1969-04-22 Method of detecting leaks in pipelines

Publications (1)

Publication Number Publication Date
GB1311993A true GB1311993A (en) 1973-03-28

Family

ID=5731934

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1912770A Expired GB1311993A (en) 1969-04-22 1970-04-21 Detecting leaks in pipelines

Country Status (6)

Country Link
AT (1) AT307772B (en)
BE (1) BE749324A (en)
CH (1) CH502549A (en)
FR (1) FR2046273A5 (en)
GB (1) GB1311993A (en)
NL (1) NL7005684A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2849695A1 (en) * 2003-01-08 2004-07-09 Michel Georges Andre Somnier Gas leakage control and diagnostic process for transmission pipeline, involves comparing pace of pressure variation curve with reference, and determining cause for leakage based on comparison and quantitative change of leakages

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006000220A1 (en) * 2006-05-10 2008-04-17 Deutsche Transalpine Oelleitung Gmbh Procedure for leak detection on pipelines

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2849695A1 (en) * 2003-01-08 2004-07-09 Michel Georges Andre Somnier Gas leakage control and diagnostic process for transmission pipeline, involves comparing pace of pressure variation curve with reference, and determining cause for leakage based on comparison and quantitative change of leakages

Also Published As

Publication number Publication date
AT307772B (en) 1973-06-12
DE1920398A1 (en) 1970-11-26
BE749324A (en) 1970-10-22
CH502549A (en) 1971-01-31
NL7005684A (en) 1970-10-26
DE1920398B2 (en) 1971-09-09
FR2046273A5 (en) 1971-03-05

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee