JPS5494091A - Fatigue detection of piping elbow - Google Patents

Fatigue detection of piping elbow

Info

Publication number
JPS5494091A
JPS5494091A JP16778A JP16778A JPS5494091A JP S5494091 A JPS5494091 A JP S5494091A JP 16778 A JP16778 A JP 16778A JP 16778 A JP16778 A JP 16778A JP S5494091 A JPS5494091 A JP S5494091A
Authority
JP
Japan
Prior art keywords
elbow
fatigue
strain
detect
piping
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
JP16778A
Other languages
Japanese (ja)
Inventor
Yoshio Fukuda
Toshio Ishizuki
Akio Nishioka
Masaharu Sumikawa
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP16778A priority Critical patent/JPS5494091A/en
Publication of JPS5494091A publication Critical patent/JPS5494091A/en
Pending legal-status Critical Current

Links

Landscapes

  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

PURPOSE: To easily and effectively detect the fatigue of an elbow by adhering a plurality of strain metering elements to the elbow of piping such that they are broken for different strains, thereby to electrically detect the breakage of the elements due to fatigue.
CONSTITUTION: The piping system, which is composed of an elbow 1 and two straight pipes 2 connected to the both ends thereof, is covered with a heat insulating material 3. In order to detect the fatigue at the point A where the initial fatigue cracking is most liable to take place, a plurality of strain guages 4 to 8 each having one strain metering element are arranged at a preset spacing on the sides of the elbow 1 and the straight tubes 2 consecutively from the point A. The number of the strain guages is determined in accordance with the detecting accuracy required. The strains detected by the gauges 4 to 8 are continuously recorded in a recorder in accordance with the known strain measuring method. From the recorded results, the fatigue of the elbow can be deduced.
COPYRIGHT: (C)1979,JPO&Japio
JP16778A 1978-01-06 1978-01-06 Fatigue detection of piping elbow Pending JPS5494091A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16778A JPS5494091A (en) 1978-01-06 1978-01-06 Fatigue detection of piping elbow

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16778A JPS5494091A (en) 1978-01-06 1978-01-06 Fatigue detection of piping elbow

Publications (1)

Publication Number Publication Date
JPS5494091A true JPS5494091A (en) 1979-07-25

Family

ID=11466466

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16778A Pending JPS5494091A (en) 1978-01-06 1978-01-06 Fatigue detection of piping elbow

Country Status (1)

Country Link
JP (1) JPS5494091A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013117459A (en) * 2011-12-05 2013-06-13 Ihi Corp Method for detecting damage of pipe

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013117459A (en) * 2011-12-05 2013-06-13 Ihi Corp Method for detecting damage of pipe

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