FR2311292A2 - Detecting leaks in an inaccessible wall - by creating and measuring a leak-induced temp. gradient on an accessible surface - Google Patents

Detecting leaks in an inaccessible wall - by creating and measuring a leak-induced temp. gradient on an accessible surface

Info

Publication number
FR2311292A2
FR2311292A2 FR7515052A FR7515052A FR2311292A2 FR 2311292 A2 FR2311292 A2 FR 2311292A2 FR 7515052 A FR7515052 A FR 7515052A FR 7515052 A FR7515052 A FR 7515052A FR 2311292 A2 FR2311292 A2 FR 2311292A2
Authority
FR
France
Prior art keywords
temp
gradient
leak
measuring
gases
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
FR7515052A
Other languages
French (fr)
Other versions
FR2311292B2 (en
Inventor
Michel Kotcharian
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.)
Technigaz
Original Assignee
Technigaz
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 FR7441238A external-priority patent/FR2294439A1/en
Application filed by Technigaz filed Critical Technigaz
Priority to FR7515052A priority Critical patent/FR2311292A2/en
Publication of FR2311292A2 publication Critical patent/FR2311292A2/en
Application granted granted Critical
Publication of FR2311292B2 publication Critical patent/FR2311292B2/fr
Granted legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/12—Arrangements or mounting of devices for preventing or minimising the effect of explosion ; Other safety measures
    • F17C13/126—Arrangements or mounting of devices for preventing or minimising the effect of explosion ; Other safety measures for large storage containers for liquefied gas
    • 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
    • G01M3/002—Investigating fluid-tightness of structures by using thermal means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0147—Shape complex
    • F17C2201/0157—Polygonal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0404—Parameters indicated or measured
    • F17C2250/0439—Temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/03—Dealing with losses
    • F17C2260/035—Dealing with losses of fluid
    • F17C2260/036—Avoiding leaks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/03—Dealing with losses
    • F17C2260/035—Dealing with losses of fluid
    • F17C2260/038—Detecting leaked fluid

Abstract

Method comprises creating and measuring a temp. gradient on an accessible surface. The temp. gradient represents the distribution and the degree of leakages and is detected by heat sensitive substances with change in colour with changes in temp., e.g. cholesteryl liq. crystals. The temp. gradient is produced by an exothermic reaction between two gases, contained in spaces on either side of the wall under observation, coming into contact if a leak occurs. The gases in the spaces are maintained at different presures from one another. The heat-sensitive substances may be applied as paints in zones distributed so as to be affected by any leak. The zones may be platelets incorporation an adhesive layer and a plastic support layer covered with the paint. The gases may be ammonia and formaldehyde or ethanal.
FR7515052A 1974-12-13 1975-05-14 Detecting leaks in an inaccessible wall - by creating and measuring a leak-induced temp. gradient on an accessible surface Granted FR2311292A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7515052A FR2311292A2 (en) 1974-12-13 1975-05-14 Detecting leaks in an inaccessible wall - by creating and measuring a leak-induced temp. gradient on an accessible surface

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7441238A FR2294439A1 (en) 1974-12-13 1974-12-13 Testing inaccessible thermal barrier in liquified gas tank - thermographic camera measures thermal differences in pressure gradient
FR7515052A FR2311292A2 (en) 1974-12-13 1975-05-14 Detecting leaks in an inaccessible wall - by creating and measuring a leak-induced temp. gradient on an accessible surface

Publications (2)

Publication Number Publication Date
FR2311292A2 true FR2311292A2 (en) 1976-12-10
FR2311292B2 FR2311292B2 (en) 1978-12-22

Family

ID=26218643

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7515052A Granted FR2311292A2 (en) 1974-12-13 1975-05-14 Detecting leaks in an inaccessible wall - by creating and measuring a leak-induced temp. gradient on an accessible surface

Country Status (1)

Country Link
FR (1) FR2311292A2 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4357113A (en) * 1980-05-14 1982-11-02 Brooks Wahner E Liquid container leakage detection method and system
EP0358164A2 (en) * 1988-09-07 1990-03-14 Steuler-Industriewerke GmbH Method for setting a leak indication and/or a thermal insulation gap between a wall and a lining panel as well as the application of the lining panel therefor
FR2722000A1 (en) * 1994-07-04 1996-01-05 Hurbe Emile Thermographic method for locating buried pipe leak
EP0783099A1 (en) * 1996-01-04 1997-07-09 Emile Hurbe Procedure for localizing leaks of hidden pipes by thermography or analogue
FR2952715A1 (en) * 2009-11-13 2011-05-20 Gaztransp Et Technigaz Method for locating leakages of tank e.g. liquefied natural gas or methane tank, involves generating depression in space with respect to interior of tank, applying liquid film on front face of membrane, and detecting cold points of membrane

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3736790A (en) * 1971-08-26 1973-06-05 A Pontello Apparatus for non-destructively testing fuel filters

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3736790A (en) * 1971-08-26 1973-06-05 A Pontello Apparatus for non-destructively testing fuel filters

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
REVUE FR "L'AERONAUTIQUE ET L'ASTRONAUTIQUE", NO. 36 AVRIL 1972, PAGES 57 A 62 ARTICLE DE MAIGRET ET AL: "METHODES AVANCEES DE CONTROLE NON DESTRUCTIF POUR RESERVOIRS EN FIL BOBINE ET COMPOSITES EN GENERAL") *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4357113A (en) * 1980-05-14 1982-11-02 Brooks Wahner E Liquid container leakage detection method and system
EP0358164A2 (en) * 1988-09-07 1990-03-14 Steuler-Industriewerke GmbH Method for setting a leak indication and/or a thermal insulation gap between a wall and a lining panel as well as the application of the lining panel therefor
EP0358164A3 (en) * 1988-09-07 1990-06-06 Steuler-Industriewerke Gmbh Method for setting a leak indication and/or a thermal insulation gap between a wall and a lining panel as well as the application of the lining panel therefor
FR2722000A1 (en) * 1994-07-04 1996-01-05 Hurbe Emile Thermographic method for locating buried pipe leak
EP0783099A1 (en) * 1996-01-04 1997-07-09 Emile Hurbe Procedure for localizing leaks of hidden pipes by thermography or analogue
FR2952715A1 (en) * 2009-11-13 2011-05-20 Gaztransp Et Technigaz Method for locating leakages of tank e.g. liquefied natural gas or methane tank, involves generating depression in space with respect to interior of tank, applying liquid film on front face of membrane, and detecting cold points of membrane

Also Published As

Publication number Publication date
FR2311292B2 (en) 1978-12-22

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