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- 川口 忍
- 東京ガス株式会社パイプライン技術センター
書誌事項
- タイトル別名
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- Measures to prevent serious leakage due to third-party mechanical impact for secure higher-pressurized natural gas pipelines
- コウアツ ガス パイプライン ニ オケル ショウゲキ ニ ヨル ダイキボ ロウエイ ノ ボウシ タイサク
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抄録
The recommended practice proposed by the Japanese government describes the base requirements for design, operation, and maintenance of secure natural gas pipelines, in which operators are required to prevent serious leakage from the pipelines even in the rare event of third-party mechanical impact, as this can cause several types of large-scale fracture resulting in serious leakage of flammable natural gas, including brittle fractures and serious ductile fractures such as a rupture and a dynamic ductile fracture. These large-scale fractures can be perfectly controlled by the following measures: (1) specifying the fracture toughness of the line-pipe material, that is, the appropriate values of shear fracture area percent from the drop-weight tear test (DWTT) to prevent brittle fractures, and absorption energy from the Charpy impact test to prevent ductile fractures;and (2) applying the lower design factor to the pipelines, which is the ratio of the hoop stress to the flow stress of the pipe material. The required values of the Charpy energy for secure pipelines could be calculated using the conventional equation or evaluation method; however, it is noted that recent studies clarify that these sometimes give non-conservative results regarding fracture criteria when evaluating integrity of recent higher-pressurized gas pipelines applying line-pipe steel having a higher strength and a higher fracture toughness.
収録刊行物
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- 圧力技術
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圧力技術 49 (4), 165-173, 2011
一般社団法人 日本高圧力技術協会
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詳細情報 詳細情報について
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- CRID
- 1390001204615990528
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- NII論文ID
- 10029298666
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- NII書誌ID
- AN00011762
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- ISSN
- 13479598
- 03870154
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- NDL書誌ID
- 11203560
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可