| 摘要: |
| 目前海底管道建设中, CRA管线应用越来越多。CRA海管为不锈钢内衬海管, 具有耐腐蚀、耐恶劣工况的特点。CRA海管不锈钢衬层出现超标缺陷时需要进行切管处理, 海管海上铺设时, 切管重焊需要铺管船进行倒船作业, 耗费大量时间, 且有损坏海管外部涂层的风险。本文介绍了一种基于海洋石油201船实际使用、能适配于海上铺管作业的, 利用数字射线技术提前检验根部缺陷的方案, 能够提前检测焊缝根部缺陷, 对根部不锈钢衬层提前进行切管处理, 大幅减少倒船切管作业工作量和所消耗时间。该方案对CRA海管的海上铺设环焊缝检验提供了良好的方案借鉴。 |
| 关键词: CRA海管 数字射线DR 海管铺设 无损检测 |
| DOI：10.11759/hykx20250325001 |
| 分类号:TE973.6 |
| 基金项目:中国海洋石油集团公司“十四五”重大科技项目“智能制造关键技术”(E0822J003) |
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| Digital radiography detection scheme for circumferential welds of CRA subsea pipelines laid on the main line of the HYSY 201 vessel |
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WANG Zhao, XIAO Liquan, WU Yuan, CHEN Liang, CHANG Yu, ZHANG Tianjiang
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Offshore Oil Engineering Co., Ltd, Tianjin, Binhaixinqu, 300450
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| Abstract: |
| Corrosion-resistant alloy (CRA) pipelines lined with stainless steel are becoming increasingly common in modern submarine construction. These pipelines are suitable for harsh environments because of their corrosion resistance. However, if excessive defects are found in the stainless steel lining, a section of the pipe must be cut out and replaced. During the offshore laying of submarine pipelines, the cutting and rewelding process forces the vessel to reverse its operation. This consumes a large amount of time and risks damaging the external coating of the submarine pipeline. This study introduces an operational scheme for offshore pipe-laying, which was developed from the actual use of the HYSY 201 vessel. The scheme employs digital radiography technology to proactively detect weld root defects. This allows for the advanced cutting and treatment of defective stainless steel lining, significantly reducing the time and operational workload associated with vessel reversal and pipe cutting. The proposed method provides a valuable reference for circumferential weld inspection during the offshore laying of CRA submarine pipelines. |
| Key words: CRA pipeline digital radiographic subsea pipeline laying nondestructive testing |
