JPS57106837A - Method of leaking point detection of buried gas pipe - Google Patents

Method of leaking point detection of buried gas pipe

Info

Publication number
JPS57106837A
JPS57106837A JP18431480A JP18431480A JPS57106837A JP S57106837 A JPS57106837 A JP S57106837A JP 18431480 A JP18431480 A JP 18431480A JP 18431480 A JP18431480 A JP 18431480A JP S57106837 A JPS57106837 A JP S57106837A
Authority
JP
Japan
Prior art keywords
gas
density
pipe
point
hole
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
JP18431480A
Other languages
Japanese (ja)
Other versions
JPS642207B2 (en
Inventor
Michio Ogura
Kazuyuki Oota
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.)
Osaka Gas Co Ltd
Original Assignee
Osaka Gas Co 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 Osaka Gas Co Ltd filed Critical Osaka Gas Co Ltd
Priority to JP18431480A priority Critical patent/JPS57106837A/en
Publication of JPS57106837A publication Critical patent/JPS57106837A/en
Publication of JPS642207B2 publication Critical patent/JPS642207B2/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
    • G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
    • G01M3/22—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material 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)
  • Examining Or Testing Airtightness (AREA)

Abstract

PURPOSE:To search a leaking point by forcibly discharging staying vapor in the condition that plural holes formed near by a gas pipe are being sealed, and detecting the density of gas in after some time. CONSTITUTION:Centering a point where leakage of gas is found out, a plural number of vertical holes 2a, 2b... is formed in the axis direction of a buried gas pipe 1. The initial density of the gas is measured and recorded by inserting a gas detector 3 in each vertical hole. Then, a perforated pipe 4 is inserted into the vertical holes in order initiating at the hole 2a where leakage is found out, and the entrance port is blocked with a sealing material 5 to seal each hole, the vacuum pump connected with the pipe 4 is operated to discharge forcibly the vapor containing the leaked gas which is staying or dispersed in its surrounding ground for a specified period. Afterwards, when certain time has passed, the density of the gas is measured and recorded again at the equal time intervals for several times in each vertical hole, and the grade of density till it returns to the initially measured density is aquired, then the point were the grade of density is the largest is decided as the leaking point.
JP18431480A 1980-12-24 1980-12-24 Method of leaking point detection of buried gas pipe Granted JPS57106837A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18431480A JPS57106837A (en) 1980-12-24 1980-12-24 Method of leaking point detection of buried gas pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18431480A JPS57106837A (en) 1980-12-24 1980-12-24 Method of leaking point detection of buried gas pipe

Publications (2)

Publication Number Publication Date
JPS57106837A true JPS57106837A (en) 1982-07-02
JPS642207B2 JPS642207B2 (en) 1989-01-17

Family

ID=16151165

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18431480A Granted JPS57106837A (en) 1980-12-24 1980-12-24 Method of leaking point detection of buried gas pipe

Country Status (1)

Country Link
JP (1) JPS57106837A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6212829A (en) * 1985-07-10 1987-01-21 Tokyo Gas Co Ltd Method and device for detecting leak place of buried pipe of gas
US4709576A (en) * 1986-10-14 1987-12-01 Applied Biology, Inc. Leak detection method and apparatus
WO1990013803A1 (en) * 1989-05-04 1990-11-15 Iit Research Institute Monitoring system and method for performing gas analysis

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6212829A (en) * 1985-07-10 1987-01-21 Tokyo Gas Co Ltd Method and device for detecting leak place of buried pipe of gas
US4709576A (en) * 1986-10-14 1987-12-01 Applied Biology, Inc. Leak detection method and apparatus
WO1990013803A1 (en) * 1989-05-04 1990-11-15 Iit Research Institute Monitoring system and method for performing gas analysis

Also Published As

Publication number Publication date
JPS642207B2 (en) 1989-01-17

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