LNG接收站不锈钢管线封底焊接工艺改进  

Improvement of Welding Process of Stainless Steel Pipeline Bottom Sealing in LNG Terminal

作　　者：王威[1] 杨鹏[1] 邓立超 武丙东 姚金良 WANG Wei;YANG Peng;DENG Lichao;WU Bingdong;YAO Jinliang(Offshore Oil Engineering Co.,Ltd.,Tianjin 300452)

机构地区：[1]海洋石油工程股份有限公司,天津300452

出　　处：《中国科技纵横》2025年第2期74-76,共3页China Science & Technology Overview

摘　　要：LNG接收站作为液化天然气供应链中的关键环节,不锈钢管线的焊接质量直接关系到整个设施的安全运行和长期稳定性。基于此,本文详细描述了针对LNG接收站24寸及以上管径不锈钢管线封底焊接工艺的改进过程。通过采用管线外部充气、内部封底的方法,成功解决了原工艺中存在的充气时间长、气体消耗量大、焊接合格率低等问题。改进后的工艺不仅减少了管线内部保护气体的用量,降低了生产成本,还提高了焊接质量和工作效率,推进工程顺利进行。As a key link in the LNG supply chain,the welding quality of the LNG terminal is directly related to the safe operation and long-term stability of the entire facility.Based on this,this paper describes in detail the improvement process of welding process of stainless steel pipeline at 24 inches and above.By adopting the method of external inflation and internal bottom sealing,the problems of long inflation time,large gas consumption and low welding qualified rate in the original process have been successfully solved.The improved process not only reduces the amount of protective gas inside the pipeline,reduces the production cost,but also improves the welding quality and work efficiency,ensuring the smooth progress of the project.

关 键 词：LNG接收站 不锈钢管线 封底技术 工艺改进 

分 类 号：TE821[石油与天然气工程—油气储运工程]