JPS57113339A - Method for detecting oil leakage - Google Patents

Method for detecting oil leakage

Info

Publication number
JPS57113339A
JPS57113339A JP18922480A JP18922480A JPS57113339A JP S57113339 A JPS57113339 A JP S57113339A JP 18922480 A JP18922480 A JP 18922480A JP 18922480 A JP18922480 A JP 18922480A JP S57113339 A JPS57113339 A JP S57113339A
Authority
JP
Japan
Prior art keywords
cable
core
core wires
insulation layer
sag
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
JP18922480A
Other languages
Japanese (ja)
Other versions
JPS6235612B2 (en
Inventor
Ikuo Shigetoshi
Michio Takaoka
Shotaro Yoshida
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.)
Fujikura Ltd
Original Assignee
Fujikura Ltd
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 Fujikura Ltd filed Critical Fujikura Ltd
Priority to JP18922480A priority Critical patent/JPS57113339A/en
Publication of JPS57113339A publication Critical patent/JPS57113339A/en
Publication of JPS6235612B2 publication Critical patent/JPS6235612B2/ja
Granted 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
    • G01M3/04—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
    • G01M3/165—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means by means of cables or similar elongated devices, e.g. tapes
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Pipeline Systems (AREA)
  • Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Examining Or Testing Airtightness (AREA)

Abstract

PURPOSE:To prevent electrolytic corrosion without need for connection work between the electrode and the cable core wire by using for the electrode a part of a core wire coated with a semiconductive layer after the insulation layer is removed therefrom. CONSTITUTION:A multi-core cable for transmission uses a cable 30 with a sag in which core wires 40 are put together by an alternately inverted twisting at a short pitch. The core wires 40 employ a conductor 400 onto which a semiconductive layer 402 and an insulation layer 404 are extruded doubly. The cable 30 thus obtained is installed underground along an oil tube 10 and different core wires 40 are drawn out with a sag sequentially at specified intervals. The core wires thus drawn out are used for electrodes 21... by removing the insulation layer 404 by a proper length. One end of the multi-core cable 30 is connected to a detector section 50.
JP18922480A 1980-12-29 1980-12-29 Method for detecting oil leakage Granted JPS57113339A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18922480A JPS57113339A (en) 1980-12-29 1980-12-29 Method for detecting oil leakage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18922480A JPS57113339A (en) 1980-12-29 1980-12-29 Method for detecting oil leakage

Publications (2)

Publication Number Publication Date
JPS57113339A true JPS57113339A (en) 1982-07-14
JPS6235612B2 JPS6235612B2 (en) 1987-08-03

Family

ID=16237647

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18922480A Granted JPS57113339A (en) 1980-12-29 1980-12-29 Method for detecting oil leakage

Country Status (1)

Country Link
JP (1) JPS57113339A (en)

Also Published As

Publication number Publication date
JPS6235612B2 (en) 1987-08-03

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