JP2012176412A - 熱処理方法 - Google Patents
熱処理方法 Download PDFInfo
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- JP2012176412A JP2012176412A JP2011039176A JP2011039176A JP2012176412A JP 2012176412 A JP2012176412 A JP 2012176412A JP 2011039176 A JP2011039176 A JP 2011039176A JP 2011039176 A JP2011039176 A JP 2011039176A JP 2012176412 A JP2012176412 A JP 2012176412A
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Abstract
【解決手段】直径が200mm以下、板厚が15mm以下の小口径配管の溶接部近傍を加熱した後、配管内面を冷却する熱処理方法において、施工時に施工部の配管外面の温度低下速度と当該速度測定位置の配管肉厚を測定することを特徴とする。
【選択図】 図6
Description
11 配管内表面温度
20 内外面温度差
21 外表面温度低下速度
22 最大内外面温度差
23 最大外表面温度低下速度
30 ヒーター,保温材
31 冷却水
32 温度測定器
40 目標最大外表面温度低下速度
60 熱処理開始
61 板厚測定工程
62 温度計測器取り付け工程
63 ヒーター・保温材取り付け工程
64 加熱工程
65 冷却工程
66 温度測定
67 最大外表面温度低下速度の算出
68 判定基準との比較
69 判定
70 施工条件見直し
71 施工完了
100 配管
Claims (3)
- 直径が200mm以下、板厚が15mm以下の小口径配管の溶接部近傍を加熱した後、配管内面を冷却する熱処理方法において、施工時に施工部の配管外面の温度低下速度と当該速度測定位置の配管肉厚を測定することを特徴とする熱処理方法。
- 請求項1において、予め求めた、配管径と配管肉厚ごとの温度測定位置の外面の温度低下速度と内外温度差の関係から定まる、所定の内外温度差となる配管肉厚と外面の温度低下速度の関係に基づいて、施工時に測定した施工部の配管外面の温度低下速度と当該速度測定位置の板厚から、施工の適否を判定することを特徴とする熱処理方法。
- 請求項1において、溶接中心から15〜50mm離れた位置で外面の温度低下速度を測定することを特徴とする熱処理方法。
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JP2011039176A JP5750276B2 (ja) | 2011-02-25 | 2011-02-25 | 熱処理方法 |
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JP2012176412A true JP2012176412A (ja) | 2012-09-13 |
JP5750276B2 JP5750276B2 (ja) | 2015-07-15 |
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Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5494415A (en) * | 1978-01-11 | 1979-07-26 | Hitachi Ltd | Heat treatment method of pipes |
JPS6156746A (ja) * | 1984-08-25 | 1986-03-22 | Sumitomo Metal Ind Ltd | 継目無鋼管の拡管加工法 |
JPH03148006A (ja) * | 1989-11-06 | 1991-06-24 | Kawasaki Heavy Ind Ltd | 異材質製複重管の肉厚測定方法 |
JP2005320626A (ja) * | 2004-04-06 | 2005-11-17 | Hitachi Ltd | 熱処理方法及びその装置 |
JP2008189983A (ja) * | 2007-02-02 | 2008-08-21 | Hitachi-Ge Nuclear Energy Ltd | 小口径配管における残留応力低減方法 |
JP2010096504A (ja) * | 2008-10-14 | 2010-04-30 | Hioki Ee Corp | 被測定物の肉厚非破壊検査方法およびその装置 |
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2011
- 2011-02-25 JP JP2011039176A patent/JP5750276B2/ja active Active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5494415A (en) * | 1978-01-11 | 1979-07-26 | Hitachi Ltd | Heat treatment method of pipes |
JPS6156746A (ja) * | 1984-08-25 | 1986-03-22 | Sumitomo Metal Ind Ltd | 継目無鋼管の拡管加工法 |
JPH03148006A (ja) * | 1989-11-06 | 1991-06-24 | Kawasaki Heavy Ind Ltd | 異材質製複重管の肉厚測定方法 |
JP2005320626A (ja) * | 2004-04-06 | 2005-11-17 | Hitachi Ltd | 熱処理方法及びその装置 |
JP2008189983A (ja) * | 2007-02-02 | 2008-08-21 | Hitachi-Ge Nuclear Energy Ltd | 小口径配管における残留応力低減方法 |
JP2010096504A (ja) * | 2008-10-14 | 2010-04-30 | Hioki Ee Corp | 被測定物の肉厚非破壊検査方法およびその装置 |
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