FR2385030A1 - Inhibition of crack propagation in gas pipelines - by surrounding with strengthening steel rope at intervals - Google Patents

Inhibition of crack propagation in gas pipelines - by surrounding with strengthening steel rope at intervals

Info

Publication number
FR2385030A1
FR2385030A1 FR7708765A FR7708765A FR2385030A1 FR 2385030 A1 FR2385030 A1 FR 2385030A1 FR 7708765 A FR7708765 A FR 7708765A FR 7708765 A FR7708765 A FR 7708765A FR 2385030 A1 FR2385030 A1 FR 2385030A1
Authority
FR
France
Prior art keywords
gasline
steel rope
gaslines
surrounding
intervals
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.)
Withdrawn
Application number
FR7708765A
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.)
Italsider SpA
Original Assignee
Italsider SpA
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 Italsider SpA filed Critical Italsider SpA
Priority to FR7708765A priority Critical patent/FR2385030A1/en
Publication of FR2385030A1 publication Critical patent/FR2385030A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
    • F16L57/02—Protection of pipes or objects of similar shape against external or internal damage or wear against cracking or buckling

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Abstract

The propagation of cracks in gaslines is inhibited by steel rope wound around pipeline at intervals along its length so that a surrounding portion of the line has the relationship Cveq/Cva >=3 (where Cva is the Charpy energy per unit area measured transversely of the unstrengthened line and Cveq is the equiv. Charpy energy per unit area of the strengthened portions of the gasline). Steel rope is pref. wound around the gasline without applying tension to the rope which has an ultimate tensile strength of 100-200 kg/mm2 and a Young's modulus of 18,000 - 21,000 kg/mm2. Damage to gasline by the propagation of a crack is reduced and the system may be applied during gasline installations or to gaslines already in use. Gaslines with pipes of poorer quality may be utilised.
FR7708765A 1977-03-24 1977-03-24 Inhibition of crack propagation in gas pipelines - by surrounding with strengthening steel rope at intervals Withdrawn FR2385030A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7708765A FR2385030A1 (en) 1977-03-24 1977-03-24 Inhibition of crack propagation in gas pipelines - by surrounding with strengthening steel rope at intervals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7708765A FR2385030A1 (en) 1977-03-24 1977-03-24 Inhibition of crack propagation in gas pipelines - by surrounding with strengthening steel rope at intervals

Publications (1)

Publication Number Publication Date
FR2385030A1 true FR2385030A1 (en) 1978-10-20

Family

ID=9188500

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7708765A Withdrawn FR2385030A1 (en) 1977-03-24 1977-03-24 Inhibition of crack propagation in gas pipelines - by surrounding with strengthening steel rope at intervals

Country Status (1)

Country Link
FR (1) FR2385030A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0687849A1 (en) * 1994-06-16 1995-12-20 EMPA Eidgenössische Materialprüfungs- und Forschungsanstalt Method of limiting fast crack propagation in plastic pipes and pipes obtained by such method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0687849A1 (en) * 1994-06-16 1995-12-20 EMPA Eidgenössische Materialprüfungs- und Forschungsanstalt Method of limiting fast crack propagation in plastic pipes and pipes obtained by such method

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Legal Events

Date Code Title Description
ST Notification of lapse