JP4448873B2 - 小口径配管の残留応力改善方法 - Google Patents
小口径配管の残留応力改善方法 Download PDFInfo
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- JP4448873B2 JP4448873B2 JP2007221987A JP2007221987A JP4448873B2 JP 4448873 B2 JP4448873 B2 JP 4448873B2 JP 2007221987 A JP2007221987 A JP 2007221987A JP 2007221987 A JP2007221987 A JP 2007221987A JP 4448873 B2 JP4448873 B2 JP 4448873B2
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- Prior art keywords
- pipe
- refrigerant container
- residual stress
- insulating material
- heat insulating
- 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.)
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- 238000000034 method Methods 0.000 title claims description 27
- 239000003507 refrigerant Substances 0.000 claims description 92
- 239000011810 insulating material Substances 0.000 claims description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 238000001816 cooling Methods 0.000 claims description 15
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000009826 distribution Methods 0.000 description 44
- 238000010276 construction Methods 0.000 description 37
- 238000007711 solidification Methods 0.000 description 12
- 230000008023 solidification Effects 0.000 description 12
- 239000007787 solid Substances 0.000 description 8
- 230000004323 axial length Effects 0.000 description 7
- 238000005260 corrosion Methods 0.000 description 7
- 230000007797 corrosion Effects 0.000 description 7
- 230000005489 elastic deformation Effects 0.000 description 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 6
- 239000000498 cooling water Substances 0.000 description 6
- 238000005336 cracking Methods 0.000 description 6
- 230000000452 restraining effect Effects 0.000 description 5
- 239000000956 alloy Substances 0.000 description 4
- 238000011144 upstream manufacturing Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 3
- 235000011089 carbon dioxide Nutrition 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- 229910000851 Alloy steel Inorganic materials 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Images
Classifications
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- 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
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/10—Means for stopping flow from or in pipes or hoses
- F16L55/103—Means for stopping flow from or in pipes or hoses by temporarily freezing liquid sections in the pipe
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/62—Quenching devices
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
- C21D9/085—Cooling or quenching
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/50—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for welded joints
-
- 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
- F16L13/00—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
- F16L13/02—Welded joints
- F16L13/04—Welded joints with arrangements for preventing overstressing
- F16L13/06—Welded joints with arrangements for preventing overstressing with tension relief of the weld by means of detachable members, e.g. divided tension rings, bolts in flanges
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/001—Austenite
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/02—Hardening by precipitation
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/04—Hardening by cooling below 0 degrees Celsius
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
Description
2 開先加工部
3 配管
4 水
5 氷栓
6 氷
7 外側冷媒容器
8 内側冷媒容器
9 ドライアイス
10 エタノール
11 断熱材
12 ひずみゲージ
13 ドレン弁
14 冷媒容器
15 パッキン
16 断熱材設置具
17 ボルト
18 ナット
19 施工前の残留応力分布
20 施工中の応力分布(内圧による拡管のみ)
21 施工後の残留応力分布(内圧による拡管のみ)
22 施工中の応力分布(内圧による拡管+軸方向引張荷重付与)
23 施工後の残留応力分布(内圧による拡管+軸方向引張荷重付与)
24 施工中の応力分布(温度勾配のみ)
25 施工後の残留応力分布(温度勾配のみ)
26 施工中の応力分布(温度勾配+軸方向引張荷重付与)
27 施工後の残留応力分布(温度勾配+軸方向引張荷重付与)
28 配管固定治具
29 油圧もしくは水圧シリンダ
30 シリンダの伸び方向
31 冷媒容器上蓋
32 冷媒容器下蓋
33 ひずみ計測器
34 水平配管に耐圧性を向上させた氷栓を作成するための冷媒容器
35 垂直配管に耐圧性を向上させた氷栓を作成するための冷媒容器
36 冷媒容器側蓋(ドレン弁あり)
37 冷媒容器側蓋(ドレン弁なし)
38 平板
39 平板内の初期残留応力分布
40 冷却水
41 引張方向の外荷重
42 高周波加熱器
43 施工中の平板内応力分布
44 施工後の平板内残留応力分布
45 中実円筒
46 初期残留応力分布
47 高温環境
48 軸方向長さの拘束治具
49 拘束により負荷される引張方向の応力
50 施工後の残留応力分布
Claims (4)
- 内部が水で満たされた配管に冷媒容器を設置するとともに、前記冷媒容器の中央付近に位置する配管の外面全周に断熱材を敷設した状態で、前記冷媒容器内の配管外面を冷却することを特徴とする氷栓の作成方法。
- 内部が水で満たされた配管の突合せ溶接部を挟んで、冷媒容器を設置するとともに、前記冷媒容器の中央付近に位置する配管の外面全周に断熱材を敷設した状態で、前記冷媒容器内の配管外面を冷却して氷栓を形成して、前記氷栓で水密な空間を形成した後、
前記水密な空間の配管外面を冷却して、溶接部近傍を拡管することを特徴とする小口径配管の残留応力改善方法。 - 内部が水で満たされた配管の突合せ溶接部に対して、溶接部が冷媒容器の中央に位置するように冷媒容器を設置するとともに、溶接部と冷媒容器中央付近に位置する配管の外面全周を断熱材で覆い、冷媒容器内の配管外面を冷却することにより、1つの冷媒容器で溶接部近傍を拡管させて、配管内面に圧縮残留応力を付与することを特徴とする小口径配管の残留応力改善方法。
- 予め冷媒容器中央付近に断熱材を設置していることを特徴とする氷栓を作成するための冷媒容器。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007221987A JP4448873B2 (ja) | 2007-08-29 | 2007-08-29 | 小口径配管の残留応力改善方法 |
CA2638730A CA2638730C (en) | 2007-08-29 | 2008-08-13 | Method for improving residual stress of structure member |
US12/193,791 US20090056839A1 (en) | 2007-08-29 | 2008-08-19 | Method for Improving Residual Stress of Structure Member |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007221987A JP4448873B2 (ja) | 2007-08-29 | 2007-08-29 | 小口径配管の残留応力改善方法 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2009269401A Division JP2010042452A (ja) | 2009-11-27 | 2009-11-27 | 小口径配管の残留応力改善方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2009050906A JP2009050906A (ja) | 2009-03-12 |
JP4448873B2 true JP4448873B2 (ja) | 2010-04-14 |
Family
ID=40385235
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2007221987A Active JP4448873B2 (ja) | 2007-08-29 | 2007-08-29 | 小口径配管の残留応力改善方法 |
Country Status (3)
Country | Link |
---|---|
US (1) | US20090056839A1 (ja) |
JP (1) | JP4448873B2 (ja) |
CA (1) | CA2638730C (ja) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5367558B2 (ja) * | 2009-12-25 | 2013-12-11 | 日立Geニュークリア・エナジー株式会社 | 配管の残留応力改善方法 |
CN104854390B (zh) * | 2012-07-13 | 2016-10-26 | Mpr联合有限公司 | 减少管道焊接区域应力腐蚀开裂的内部机械应力改进方法 |
JP2014069207A (ja) | 2012-09-28 | 2014-04-21 | Mitsubishi Heavy Ind Ltd | 管径拡張装置及び管径拡張方法 |
JP6367681B2 (ja) * | 2014-10-17 | 2018-08-01 | 日立Geニュークリア・エナジー株式会社 | 配管の残留応力改善方法、氷栓間への不凍液供給方法、および配管の残留応力改善装置 |
US9739412B2 (en) | 2015-01-15 | 2017-08-22 | Mitsubishi Hitachi Power Systems, Ltd. | Method of extending life expectancy of high-temperature piping and life expectancy extension structure of high-temperature piping |
CN111676351A (zh) * | 2020-07-29 | 2020-09-18 | 中国石油大学(华东) | 局部温差调控残余应力热处理方法 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2429320A (en) * | 1944-02-22 | 1947-10-21 | Linde Air Prod Co | Method of stress-relief of welded structures |
US4590108A (en) * | 1984-07-11 | 1986-05-20 | Nippe Reynold B | Method and system for insulating pipes |
US4948435A (en) * | 1988-01-04 | 1990-08-14 | Butler Thomas M | Method for inhibiting stress corrosion cracking |
JP4448791B2 (ja) * | 2005-05-31 | 2010-04-14 | 日立Geニュークリア・エナジー株式会社 | 配管の残留応力改善方法及びその装置 |
-
2007
- 2007-08-29 JP JP2007221987A patent/JP4448873B2/ja active Active
-
2008
- 2008-08-13 CA CA2638730A patent/CA2638730C/en active Active
- 2008-08-19 US US12/193,791 patent/US20090056839A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
CA2638730C (en) | 2011-09-20 |
CA2638730A1 (en) | 2009-02-28 |
JP2009050906A (ja) | 2009-03-12 |
US20090056839A1 (en) | 2009-03-05 |
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