FR2080411A5 - Monitoring pipe wall thickness - using radiation situated beyond and to the mandrel - Google Patents

Monitoring pipe wall thickness - using radiation situated beyond and to the mandrel

Info

Publication number
FR2080411A5
FR2080411A5 FR7100784A FR7100784A FR2080411A5 FR 2080411 A5 FR2080411 A5 FR 2080411A5 FR 7100784 A FR7100784 A FR 7100784A FR 7100784 A FR7100784 A FR 7100784A FR 2080411 A5 FR2080411 A5 FR 2080411A5
Authority
FR
France
Prior art keywords
mandrel
wall thickness
pipe wall
monitoring pipe
situated beyond
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.)
Expired
Application number
FR7100784A
Other languages
French (fr)
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.)
ABB Training Center GmbH and Co KG
Original Assignee
Hartmann and Braun AG
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 Hartmann and Braun AG filed Critical Hartmann and Braun AG
Application granted granted Critical
Publication of FR2080411A5 publication Critical patent/FR2080411A5/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B15/00—Measuring arrangements characterised by the use of electromagnetic waves or particle radiation, e.g. by the use of microwaves, X-rays, gamma rays or electrons
    • G01B15/04—Measuring arrangements characterised by the use of electromagnetic waves or particle radiation, e.g. by the use of microwaves, X-rays, gamma rays or electrons for measuring contours or curvatures
    • G01B15/045—Measuring arrangements characterised by the use of electromagnetic waves or particle radiation, e.g. by the use of microwaves, X-rays, gamma rays or electrons for measuring contours or curvatures by measuring absorption

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

A radioactive source is mounted on the axis of a hollow mandrel in the die of a pipe extruder. Three or more radiation detectors mounted at regular intervals around the outside of the extrudate are level with the radioactive source. Lack of balance between the emission capture signals is used to indicate or control any eccentricity in the section during extrusion of plastic or of seamless metal tubing.
FR7100784A 1970-02-26 1971-01-12 Monitoring pipe wall thickness - using radiation situated beyond and to the mandrel Expired FR2080411A5 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2009003 1970-02-26

Publications (1)

Publication Number Publication Date
FR2080411A5 true FR2080411A5 (en) 1971-11-12

Family

ID=5763441

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7100784A Expired FR2080411A5 (en) 1970-02-26 1971-01-12 Monitoring pipe wall thickness - using radiation situated beyond and to the mandrel

Country Status (1)

Country Link
FR (1) FR2080411A5 (en)

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Legal Events

Date Code Title Description
ST Notification of lapse