FR2377036A1 - Electronic monitoring of pipe welds - is performed by applying HV along subterranean pipe and measuring fluctuations in voltage either side of weld - Google Patents

Electronic monitoring of pipe welds - is performed by applying HV along subterranean pipe and measuring fluctuations in voltage either side of weld

Info

Publication number
FR2377036A1
FR2377036A1 FR7616935A FR7616935A FR2377036A1 FR 2377036 A1 FR2377036 A1 FR 2377036A1 FR 7616935 A FR7616935 A FR 7616935A FR 7616935 A FR7616935 A FR 7616935A FR 2377036 A1 FR2377036 A1 FR 2377036A1
Authority
FR
France
Prior art keywords
pipe
weld
applying
voltage
electronic 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.)
Granted
Application number
FR7616935A
Other languages
French (fr)
Other versions
FR2377036B1 (en
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.)
COPRELEC
Original Assignee
COPRELEC
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
Application filed by COPRELEC filed Critical COPRELEC
Priority to FR7616935A priority Critical patent/FR2377036A1/en
Publication of FR2377036A1 publication Critical patent/FR2377036A1/en
Application granted granted Critical
Publication of FR2377036B1 publication Critical patent/FR2377036B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
    • G01N27/20—Investigating the presence of flaws
    • 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
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/16—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means
    • G01M3/18—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
    • 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
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/16—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means
    • G01M3/18—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
    • G01M3/183—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators for pipe joints or seals
    • 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
    • G01M3/40—Investigating fluid-tightness of structures by using electric means, e.g. by observing electric discharges

Abstract

The integrity of welded joints in a buried pipe (2) is monitored by an electrical apparatus. Points on the pipe remote from the welded joint on either side thereof have integral terminals (7) and (8) to which electrical supply lines (5) (6) are connected. a power source (4) applies a charge to the lines (5)(6) causing a high potential difference across the length of pipe (D) spanning the monitored weld (3). Interrogation lines (12)(13) are connected to remote monitor (9) and measure the potential across the smaller length of pipe (d) also spanning the weld (3). Fluctuations in the measured p.d. across the indicate fault conditions therein.
FR7616935A 1976-06-04 1976-06-04 Electronic monitoring of pipe welds - is performed by applying HV along subterranean pipe and measuring fluctuations in voltage either side of weld Granted FR2377036A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7616935A FR2377036A1 (en) 1976-06-04 1976-06-04 Electronic monitoring of pipe welds - is performed by applying HV along subterranean pipe and measuring fluctuations in voltage either side of weld

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7616935A FR2377036A1 (en) 1976-06-04 1976-06-04 Electronic monitoring of pipe welds - is performed by applying HV along subterranean pipe and measuring fluctuations in voltage either side of weld

Publications (2)

Publication Number Publication Date
FR2377036A1 true FR2377036A1 (en) 1978-08-04
FR2377036B1 FR2377036B1 (en) 1981-03-20

Family

ID=9174005

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7616935A Granted FR2377036A1 (en) 1976-06-04 1976-06-04 Electronic monitoring of pipe welds - is performed by applying HV along subterranean pipe and measuring fluctuations in voltage either side of weld

Country Status (1)

Country Link
FR (1) FR2377036A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4667149A (en) * 1983-05-31 1987-05-19 American Telephone And Telegraph Company, At&T Bell Laboratories Precision nondestructive testing of metals
CN112178469A (en) * 2020-11-11 2021-01-05 南京卓为工程监理有限公司 Welding quality detection device for natural gas distributed energy pipe network

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4667149A (en) * 1983-05-31 1987-05-19 American Telephone And Telegraph Company, At&T Bell Laboratories Precision nondestructive testing of metals
CN112178469A (en) * 2020-11-11 2021-01-05 南京卓为工程监理有限公司 Welding quality detection device for natural gas distributed energy pipe network

Also Published As

Publication number Publication date
FR2377036B1 (en) 1981-03-20

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Legal Events

Date Code Title Description
ST Notification of lapse