JPS5627647A - Supersonic flaw detecting method for centrifugal cast stainless steel pipe exposed to high temperature - Google Patents

Supersonic flaw detecting method for centrifugal cast stainless steel pipe exposed to high temperature

Info

Publication number
JPS5627647A
JPS5627647A JP10311979A JP10311979A JPS5627647A JP S5627647 A JPS5627647 A JP S5627647A JP 10311979 A JP10311979 A JP 10311979A JP 10311979 A JP10311979 A JP 10311979A JP S5627647 A JPS5627647 A JP S5627647A
Authority
JP
Japan
Prior art keywords
pipe
supersonic
stainless steel
steel pipe
supersonic waves
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
JP10311979A
Other languages
Japanese (ja)
Other versions
JPH0155409B2 (en
Inventor
Yutaka Ueda
Yuichi Matsubara
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.)
Eneos Corp
Original Assignee
Nippon Petroleum Refining 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 Nippon Petroleum Refining Co Ltd filed Critical Nippon Petroleum Refining Co Ltd
Priority to JP10311979A priority Critical patent/JPS5627647A/en
Publication of JPS5627647A publication Critical patent/JPS5627647A/en
Publication of JPH0155409B2 publication Critical patent/JPH0155409B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Abstract

PURPOSE: To enable to ascertain the state of deterioration correctly by fixing probes to different holders respectively and making transmitting pulses pass a part about 2/3 of the thickness of an inspected pipe from its outer surface.
CONSTITUTION: Generally the crystal grains of a centrifugal cast stainless steel pipe 1 are coarse having highly directional property and the scattering and attenuation of supersonic waves in the pipe are serious, therefore, longitudinal supersonic waves of a frequency of 0.5W2MHz are used for flaw detection. Such supersonic waves are transmitted from a transmitting probe 3 electrically connected with a flaw detector 10 to the inspected pipe 1, received and converted into electric signals by a receiving probe 4 and outputted to the flaw detector 10. The existence and sizes of inside cracks 2 obtained by the flaw detector 10 are displayed as a chart 12 by a recorder 11. As the inside cracks 2 occur mostly in a part about 2/3 of the thickness of the inspected pipe 1 from its outer surface, the angle of incidence of the supersonic waves is set so that supersonic transmitting pulses may pass through said layer.
COPYRIGHT: (C)1981,JPO&Japio
JP10311979A 1979-08-15 1979-08-15 Supersonic flaw detecting method for centrifugal cast stainless steel pipe exposed to high temperature Granted JPS5627647A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10311979A JPS5627647A (en) 1979-08-15 1979-08-15 Supersonic flaw detecting method for centrifugal cast stainless steel pipe exposed to high temperature

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10311979A JPS5627647A (en) 1979-08-15 1979-08-15 Supersonic flaw detecting method for centrifugal cast stainless steel pipe exposed to high temperature

Publications (2)

Publication Number Publication Date
JPS5627647A true JPS5627647A (en) 1981-03-18
JPH0155409B2 JPH0155409B2 (en) 1989-11-24

Family

ID=14345689

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10311979A Granted JPS5627647A (en) 1979-08-15 1979-08-15 Supersonic flaw detecting method for centrifugal cast stainless steel pipe exposed to high temperature

Country Status (1)

Country Link
JP (1) JPS5627647A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6126857A (en) * 1984-07-16 1986-02-06 Kobe Steel Ltd Ultrasonic flaw detecting method and defect deciding method of centrifugally cast iron pipe
JPS6169157U (en) * 1984-10-13 1986-05-12
JPS62179660A (en) * 1986-01-27 1987-08-06 ザ・バブコツク・アンド・ウイルコツクス・カンパニ− Ultrasonic detecting method of hydrogen damage in boiler tube
JP2003066012A (en) * 2001-08-30 2003-03-05 Idemitsu Eng Co Ltd Method and device for inspecting defect by surface wave
JP2003329513A (en) * 2002-05-15 2003-11-19 Koyo Seiko Co Ltd Measuring method for propagation speed of ultrasonic waves in inner ring of cylindrical roller bearing and measuring method for degree of fatigue
US9267636B2 (en) 2010-05-07 2016-02-23 1876255 Ontario Limited Protective liner with wear detection
CN105672483A (en) * 2016-02-03 2016-06-15 安徽鸿路钢结构(集团)股份有限公司 Arc-shaped cross frame and round pipe connection quality control method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3302453A (en) * 1963-04-15 1967-02-07 American Mach & Foundry Method of inspection utilizing ultrasonic energy
JPS54128789A (en) * 1978-03-29 1979-10-05 Kubota Ltd Method of detecting flaw of tube via ultrasonic wave

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3302453A (en) * 1963-04-15 1967-02-07 American Mach & Foundry Method of inspection utilizing ultrasonic energy
JPS54128789A (en) * 1978-03-29 1979-10-05 Kubota Ltd Method of detecting flaw of tube via ultrasonic wave

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6126857A (en) * 1984-07-16 1986-02-06 Kobe Steel Ltd Ultrasonic flaw detecting method and defect deciding method of centrifugally cast iron pipe
JPS6169157U (en) * 1984-10-13 1986-05-12
JPS62179660A (en) * 1986-01-27 1987-08-06 ザ・バブコツク・アンド・ウイルコツクス・カンパニ− Ultrasonic detecting method of hydrogen damage in boiler tube
JP2003066012A (en) * 2001-08-30 2003-03-05 Idemitsu Eng Co Ltd Method and device for inspecting defect by surface wave
JP2003329513A (en) * 2002-05-15 2003-11-19 Koyo Seiko Co Ltd Measuring method for propagation speed of ultrasonic waves in inner ring of cylindrical roller bearing and measuring method for degree of fatigue
US9267636B2 (en) 2010-05-07 2016-02-23 1876255 Ontario Limited Protective liner with wear detection
CN105672483A (en) * 2016-02-03 2016-06-15 安徽鸿路钢结构(集团)股份有限公司 Arc-shaped cross frame and round pipe connection quality control method
CN105672483B (en) * 2016-02-03 2017-11-28 安徽鸿路钢结构(集团)股份有限公司 Arc cross and pipe quality of connection control method

Also Published As

Publication number Publication date
JPH0155409B2 (en) 1989-11-24

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