JPS5574436A - Detecting method for leakage of submarine pipe-line - Google Patents

Detecting method for leakage of submarine pipe-line

Info

Publication number
JPS5574436A
JPS5574436A JP14663878A JP14663878A JPS5574436A JP S5574436 A JPS5574436 A JP S5574436A JP 14663878 A JP14663878 A JP 14663878A JP 14663878 A JP14663878 A JP 14663878A JP S5574436 A JPS5574436 A JP S5574436A
Authority
JP
Japan
Prior art keywords
line
seawater
pipe
valve
detector
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.)
Pending
Application number
JP14663878A
Other languages
Japanese (ja)
Inventor
Shozo Yabe
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP14663878A priority Critical patent/JPS5574436A/en
Publication of JPS5574436A publication Critical patent/JPS5574436A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To detect the defect portions of a submarine pipe-line easily and positively, by mounting a seawater detector at the outlet side of the transport pipe-line of petroleum and gas laid on the sea bottom, and by lowering the pressure inside of the pipe-line at the inlet side.
CONSTITUTION: A gate or a valve 4 is mounted to the fist station 1 at the inlet side of a submarine pipe-line 3, and a seawater detector 5 is installed to the second station 2 at the outlet side in a communication shape. When the pressure in the pipe-line 3 is lowered for a fixed time by closing the valve 4, seawater flows into the pipe-line from a defect portion D if there is the defect portion. When letting gas and petroleum flow by opening the valve 4, flowing-in seawater also flows together and is detected by means of a seawater detector 5 at the outlet side. When measuring time until the seawater is detected after opening the valve, a location of the defect portion D is grasped. The location of the defect portion D is searched by inserting a seawater detector 7 into the pipe-line 3 in order to accurately detect the position of the seawater leak portion.
COPYRIGHT: (C)1980,JPO&Japio
JP14663878A 1978-11-29 1978-11-29 Detecting method for leakage of submarine pipe-line Pending JPS5574436A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14663878A JPS5574436A (en) 1978-11-29 1978-11-29 Detecting method for leakage of submarine pipe-line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14663878A JPS5574436A (en) 1978-11-29 1978-11-29 Detecting method for leakage of submarine pipe-line

Publications (1)

Publication Number Publication Date
JPS5574436A true JPS5574436A (en) 1980-06-05

Family

ID=15412243

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14663878A Pending JPS5574436A (en) 1978-11-29 1978-11-29 Detecting method for leakage of submarine pipe-line

Country Status (1)

Country Link
JP (1) JPS5574436A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4344319A (en) * 1980-03-07 1982-08-17 Hancock Dane R Pipe joint sealed test method
US5739420A (en) * 1996-09-18 1998-04-14 Peterson; Roger Ground water infiltration detection system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4344319A (en) * 1980-03-07 1982-08-17 Hancock Dane R Pipe joint sealed test method
US5739420A (en) * 1996-09-18 1998-04-14 Peterson; Roger Ground water infiltration detection system

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