JP2006038868A - パイプラインの破断前漏洩検出法 - Google Patents
パイプラインの破断前漏洩検出法 Download PDFInfo
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- JP2006038868A JP2006038868A JP2005218427A JP2005218427A JP2006038868A JP 2006038868 A JP2006038868 A JP 2006038868A JP 2005218427 A JP2005218427 A JP 2005218427A JP 2005218427 A JP2005218427 A JP 2005218427A JP 2006038868 A JP2006038868 A JP 2006038868A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/28—Investigating ductility, e.g. suitability of sheet metal for deep-drawing or spinning
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/006—Crack, flaws, fracture or rupture
- G01N2203/0062—Crack or flaws
- G01N2203/0064—Initiation of crack
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/006—Crack, flaws, fracture or rupture
- G01N2203/0062—Crack or flaws
- G01N2203/0066—Propagation of crack
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/0202—Control of the test
- G01N2203/0212—Theories, calculations
- G01N2203/0218—Calculations based on experimental data
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0274—Tubular or ring-shaped specimens
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- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
【解決手段】 破断前漏洩評価法は、亀裂発生ベースのFAD分析から破壊評価線図(FAD)評価曲線(36、100)を使用して材料中の亀裂を分析する段階と、FAD評価曲線(36、100)と併せて延性引裂き分析(112)を使用して、延性引裂き安定性及び亀裂成長の間に破断する傾向にある引裂き不安定性との少なくとも1つを示す亀裂を検出する段階とを含む。
【選択図】 図9
Description
I. Milne, R.A. Ainsworth, A.R. Dowling and A.T. Stewart、「Assessment of integrity of structures containing defects」、CEGB report R/H/R6−Revision3,1986 M. Janssen, J. Zuidema and R.J.H. Wanhill:「Elastic−Plastic fracture mechanics」,Fracture Mechanics, Part III, Chapter 8, pp.198−203,Delft University Press (2002)
Gσ>Rσ (1)
及び
Japp>Jmat (3)
及び
Japp≦Jmat
及び
しかしながら、式(5)の不等式が保持される限り、Krは減少することになる。同時に、Lrは、亀裂成長の結果として幾分増大することになり、従って、FAD36における評価点40の軌跡は、図5における初期亀裂長a0に対応する点38からほぼ下側に向くことになる(曲線ABを参照)。
上記に説明した開示は、延性引裂き及び引裂き不安定性分析手法を使用する破断前漏洩条件を提供する。この条件は、壊損前に発生する可能性がある有意な延性引裂き及び安定亀裂進展を考慮する。この基準に基づく評価は、更に正確な予測を与え、更に、限定的な現場検査とこれまでは一致している。この評価基準を使用する予備段階の結果は、SCC誘起亀裂含有パイプラインにおける破断前漏洩に対する可能性は低くはなく、例えば、90%肉厚の深さと4.5インチ未満の長さを有する亀裂は、認定X52グレード鋼においてはほとんど破断前に漏洩することを示した。これらの調査結果は、破断前漏洩が懸念される場合には、現在広く使用されている「亀裂発生ベースFAD分析」に加えて、健全性評価に延性引裂き分析を使用すべきであることを示唆する。調査結果はまた、応力単独では破断前漏洩を予測することができず、或いはその逆もまた同様であることを示唆する。組合せ応力、材料特性、温度、及び亀裂寸法は、漏洩或いは破断による破壊に対する限界条件を決定付ける。
12 第1応力曲線
14 第2応力曲線
16 R曲線
30 J−R曲線
36、100 FAD評価曲線
112 延性引裂き分析
Claims (10)
- 破断前漏洩評価方法であって、
亀裂発生ベースのFAD分析から破壊評価線図(FAD)評価曲線(36、100)を使用して材料における亀裂を分析する段階と、
前記FAD評価曲線(36、100)と併せて延性引裂き分析(112)を使用して、延性引裂き安定性と前記亀裂の成長間に破断する傾向のある引裂き不安定性との少なくとも1つを示す亀裂を検出する段階と、
を含む方法。 - 前記延性引裂き分析(112)は、前記亀裂成長中に材料破壊靱性の増大を考慮する請求項1に記載の方法。
- J積分手法を使用して前記亀裂を有する材料の弾塑性破壊挙動を説明する段階を含む請求項2に記載の方法。
- Lrは、降伏強さ(σy)に対する基準応力(σref)の比(すなわち、σref/σy)である(前記σrefは加えられた応力及び亀裂寸法の関数)請求項6に記載の方法。
- 前記Jmatは、前記亀裂進展増分(Δa)の範囲に対して材料抵抗のJ−R曲線(30、110)から導出される請求項6に記載の方法。
- 前記J−R曲線(30、110)は、評価温度に対応する温度で前記材料に対して実験的に設定されている請求項8に記載の方法。
- 前記Jappは、加えられた荷重及び前記亀裂の形状に基づいて計算される請求項6に記載の方法。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/710,702 | 2004-07-29 | ||
US10/710,702 US7039528B2 (en) | 2004-07-29 | 2004-07-29 | Method for detecting leak before rupture in a pipeline |
Publications (2)
Publication Number | Publication Date |
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JP2006038868A true JP2006038868A (ja) | 2006-02-09 |
JP4907917B2 JP4907917B2 (ja) | 2012-04-04 |
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JP2005218427A Expired - Fee Related JP4907917B2 (ja) | 2004-07-29 | 2005-07-28 | パイプラインの破断前漏洩検出法 |
Country Status (7)
Country | Link |
---|---|
US (1) | US7039528B2 (ja) |
EP (1) | EP1621862A3 (ja) |
JP (1) | JP4907917B2 (ja) |
CN (1) | CN1727891A (ja) |
CA (1) | CA2512425C (ja) |
MX (1) | MXPA05008203A (ja) |
RU (1) | RU2372596C2 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009014683A (ja) * | 2007-07-09 | 2009-01-22 | Toshiba Corp | 破壊評価方法および破壊評価システム |
JP2011043353A (ja) * | 2009-08-19 | 2011-03-03 | Ihi Corp | 破壊指標値補正方法、破壊指標値補正装置、溶接構造体の破壊特性評価方法及び溶接構造体の破壊特性評価装置 |
JP2012112803A (ja) * | 2010-11-25 | 2012-06-14 | Jfe Steel Corp | 鋼構造物の使用限界予測手法 |
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US7698076B2 (en) * | 2005-10-07 | 2010-04-13 | Veolia Es Industrial Services, Inc. | System to manage maintenance of a pipeline structure, program product, and related methods |
US20110106457A1 (en) * | 2005-11-21 | 2011-05-05 | Mcnealy Richard C | Methods, systems, and computer program products for performing structural screening |
JP5442456B2 (ja) | 2007-02-27 | 2014-03-12 | エクソンモービル アップストリーム リサーチ カンパニー | 軸方向の大きい塑性歪みに適応する炭素鋼構造およびパイプライン中の耐食合金溶接部 |
WO2008115320A1 (en) * | 2007-03-20 | 2008-09-25 | Exxonmobil Upstream Research Company | Method to measure tearing resistance |
WO2008115323A1 (en) * | 2007-03-20 | 2008-09-25 | Exxonmobil Upstream Research Company | A framework to determine the capacity of a structure |
US7706988B2 (en) * | 2008-03-14 | 2010-04-27 | Blade Energy Partners, Inc. | Method for improved crack detection and discrimination using circumferential magnetic flux leakage |
US8256086B2 (en) * | 2009-06-25 | 2012-09-04 | Lockheed Martin Corporation | Method of producing missile nose cones |
US8386221B2 (en) * | 2009-12-07 | 2013-02-26 | Nuovo Pignone S.P.A. | Method for subsea equipment subject to hydrogen induced stress cracking |
CN101975695B (zh) * | 2010-10-15 | 2013-07-10 | 华东理工大学 | 含裂纹类缺陷承压设备的安全评定方法 |
US9558453B1 (en) | 2015-12-21 | 2017-01-31 | International Business Machines Corporation | Forecasting leaks in pipeline network |
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Family Cites Families (1)
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AT405849B (de) * | 1993-07-13 | 1999-11-25 | Hilti Ag | Verfahren zur oberflächenbehandlung von zu beschichtenden werkstücken |
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2004
- 2004-07-29 US US10/710,702 patent/US7039528B2/en not_active Expired - Fee Related
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2005
- 2005-07-07 EP EP05254270A patent/EP1621862A3/en not_active Withdrawn
- 2005-07-14 CA CA2512425A patent/CA2512425C/en not_active Expired - Fee Related
- 2005-07-28 JP JP2005218427A patent/JP4907917B2/ja not_active Expired - Fee Related
- 2005-07-28 RU RU2005124118/28A patent/RU2372596C2/ru not_active IP Right Cessation
- 2005-07-29 MX MXPA05008203A patent/MXPA05008203A/es active IP Right Grant
- 2005-07-29 CN CNA200510088158XA patent/CN1727891A/zh active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009014683A (ja) * | 2007-07-09 | 2009-01-22 | Toshiba Corp | 破壊評価方法および破壊評価システム |
JP2011043353A (ja) * | 2009-08-19 | 2011-03-03 | Ihi Corp | 破壊指標値補正方法、破壊指標値補正装置、溶接構造体の破壊特性評価方法及び溶接構造体の破壊特性評価装置 |
JP2012112803A (ja) * | 2010-11-25 | 2012-06-14 | Jfe Steel Corp | 鋼構造物の使用限界予測手法 |
Also Published As
Publication number | Publication date |
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MXPA05008203A (es) | 2006-02-01 |
EP1621862A3 (en) | 2007-01-10 |
RU2372596C2 (ru) | 2009-11-10 |
CA2512425C (en) | 2013-09-24 |
CA2512425A1 (en) | 2006-01-29 |
RU2005124118A (ru) | 2007-02-10 |
US20060025937A1 (en) | 2006-02-02 |
EP1621862A2 (en) | 2006-02-01 |
CN1727891A (zh) | 2006-02-01 |
JP4907917B2 (ja) | 2012-04-04 |
US7039528B2 (en) | 2006-05-02 |
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