GB1395852A – Apparatus for inspecting tubular goods
– Google Patents
GB1395852A – Apparatus for inspecting tubular goods
– Google Patents
Apparatus for inspecting tubular goods
Info
Publication number
GB1395852A
GB1395852A
GB3735773A
GB3735773A
GB1395852A
GB 1395852 A
GB1395852 A
GB 1395852A
GB 3735773 A
GB3735773 A
GB 3735773A
GB 3735773 A
GB3735773 A
GB 3735773A
GB 1395852 A
GB1395852 A
GB 1395852A
Authority
GB
United Kingdom
Prior art keywords
pipe
radiation
detector
passages
assembly
Prior art date
1972-08-07
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.)
Expired
Application number
GB3735773A
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.)
Plastic Applicators Inc
Original Assignee
Plastic Applicators Inc
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.)
1972-08-07
Filing date
1973-08-07
Publication date
1975-05-29
1973-08-07
Application filed by Plastic Applicators Inc
filed
Critical
Plastic Applicators Inc
1975-05-29
Publication of GB1395852A
publication
Critical
patent/GB1395852A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
G—PHYSICS
G01—MEASURING; TESTING
G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
G01N23/06—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and measuring the absorption
G01N23/18—Investigating the presence of flaws defects or foreign matter
Abstract
1395852 Inspecting pipes using radiation detectors PLASTIC APPLICATORS Inc 7 Aug 1973 [7 Aug 1972] 37357/73 Heading G1A To inspect a pipe for flaws its wall thickness is measured by a radiation detector in the pipe bore which co-operates with a multiple radiation source which is moved along a circular path round the outside of the pipe. The radiation source has three radio-active emitters which emit separate beams of radiation towards the pipe, a movable mask being provided to control the intensity and width of the total radiation emitted. The basic apparatus is shown in Fig. 1, added on to a known magnetic flaw testing machine. The known machine drives a pipe 16 to be tested through magnetic coils 18 and 20 to test for circumferential flaws and on to a current carrying probe 21 to test for longitudinal flaws. The present invention provides apparatus shown generally at 10 which comprises a detector assembly 25 fitted on to the end of the magnetic flaw probe 28 and a source assembly 27 which rotates around the pipe as the latter moves along the probe, so as to examine a helical path along the pipe. The detector assembly has fins 30, 31 Fig. 2 which help to maintain it centrally within the pipe; this fig also shows a motor 39 which causes the source assembly to rotate on bearings 37, 38. This assembly has three chambers 43, 44, 45 shown in Fig. 5, each housing a gamma emitter such as Cobalt 60 or Cesium 137; passages leading from these chambers direct radiation on to an area around the axis 17 of pipe 16. The passages are dimensioned so that by choice of the power of the individual sources a uniform radiation density is achieved in the area irradiated, and hence deviation of the detector from axis 17 can be tolerated. An apertured plate 58 is provided which is movable from left to right in Fig. 5 to block the two outer passages and provide an unobstructed passage for the central emitter if it is desired to reduce the field irradiated, e.g when small pipes are tested. In this latter case the scintillation counter used as a detector has a hollow bore, Fig. 7 (not shown), to increase the tolerance on its position. The apertured plate can be manually moved from one position to the other after the two spring loaded bolts at its ends have been released. A further apertured plate is provided below the first one, as described with regard to Fig. 3 (not shown), which allows all the passages to be blocked automatically by the operation of solenoids when the pipe is not present. This prevents the excessive radiation which would otherwise strike the detector in the absence of the pipe. Known circuitry which records the detector signals, effects calibration, and if necessary activates an alarm is described.
GB3735773A
1972-08-07
1973-08-07
Apparatus for inspecting tubular goods
Expired
GB1395852A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US00278311A
US3835323A
(en)
1972-08-07
1972-08-07
Radiation inspection apparatus with adjustable shutter for inspecting different sizes of tubular goods
Publications (1)
Publication Number
Publication Date
GB1395852A
true
GB1395852A
(en)
1975-05-29
Family
ID=23064508
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB3735773A
Expired
GB1395852A
(en)
1972-08-07
1973-08-07
Apparatus for inspecting tubular goods
Country Status (3)
Country
Link
US
(1)
US3835323A
(en)
CA
(1)
CA991320A
(en)
GB
(1)
GB1395852A
(en)
Families Citing this family (13)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3944833A
(en)
*
1968-08-23
1976-03-16
E M I Limited
Apparatus for examining a body by radiation such as X or gamma radiation
US4639941A
(en)
*
1968-08-23
1987-01-27
Emi Limited
Radiography
US3919552A
(en)
*
1968-08-23
1975-11-11
Emi Ltd
Method of and apparatus for examining a body by radiation such as X or gamma radiation
US4271362A
(en)
*
1973-07-23
1981-06-02
Republic Steel Corporation
Method and apparatus for detecting a distant object using gamma radiation
US4005311A
(en)
*
1974-02-15
1977-01-25
Georgetown University
Diagnostic X-ray systems
US4769828A
(en)
*
1975-02-21
1988-09-06
Emi Limited
Radiography
DE2547981A1
(en)
*
1975-10-27
1977-04-28
Heribert Dipl Phys Dr Rer Luig
NUCLEAR MEDICAL DIAGNOSTIC DEVICE FOR DETERMINING THE DISTRIBUTION PATTERN OF A RADIOACTIVE EMITTER
US5030911A
(en)
*
1980-10-19
1991-07-09
Baker Hughes Incorporated
Method and apparatus for displaying defects in tubular members on a two-dimensional map in a variety of display modes
US4511801A
(en)
*
1982-07-19
1985-04-16
Bethlehem Steel Corporation
Radiation scanning and measuring device
SE441631B
(en)
*
1984-08-27
1985-10-21
Stig Dahn
SET TO MEDIUM X-RANGE DETECT INHOMOGENITIES IN SPARES BETWEEN AND INSULATION IN REMOTE HEATERS AND DEVICE TO PERFORM THE SET
US5698854A
(en)
*
1996-05-20
1997-12-16
Omega International Technology, Inc.
Method and apparatus for inspecting pipes
GB2519955B
(en)
*
2013-11-01
2015-09-30
Paragon Inspection Ltd
Apparatus and method for radiological pipe inspection
CN114166157B
(en)
*
2021-12-08
2023-10-20
国能锅炉压力容器检验有限公司
Intelligent quantitative method for oxide skin in tube according to ray intensity curve
Family Cites Families (5)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US2486845A
(en)
*
1945-11-21
1949-11-01
Texas Co
Measurement of wall thickness
US2425512A
(en)
*
1945-11-21
1947-08-12
Texas Co
Measurement of thickness
US2999935A
(en)
*
1957-10-30
1961-09-12
Industrial Nucleonics Corp
Convertible radiation source
US3628029A
(en)
*
1968-07-15
1971-12-14
Schlumberger Technology Corp
Apparatus for inspecting tubular goods
US3683186A
(en)
*
1970-03-26
1972-08-08
Schlumberger Technology Corp
Apparatus for inspecting tubular goods using a radiation-focussing device for producing a substantially uniform composite radiation pattern
1972
1972-08-07
US
US00278311A
patent/US3835323A/en
not_active
Expired – Lifetime
1973
1973-08-03
CA
CA178,096A
patent/CA991320A/en
not_active
Expired
1973-08-07
GB
GB3735773A
patent/GB1395852A/en
not_active
Expired
Also Published As
Publication number
Publication date
US3835323A
(en)
1974-09-10
CA991320A
(en)
1976-06-15
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Legal Events
Date
Code
Title
Description
1975-10-08
PS
Patent sealed [section 19, patents act 1949]
1993-09-08
PE20
Patent expired after termination of 20 years
Effective date:
19930806
