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[1]丁雅萍,汤海平,姜修才.X80天然气管道在役焊接应力分析与调控[J].中国安全生产科学技术,2018,14(10):82-87.[doi:10.11731/j.issn.1673-193x.2018.10.013]
　DING Yaping,TANG Haiping,JIANG Xiucai.Analysis and control of inservice welding stress for X80 natural gas pipeline[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2018,14(10):82-87.[doi:10.11731/j.issn.1673-193x.2018.10.013]
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X80天然气管道在役焊接应力分析与调控
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
14
期数:
2018年10期
页码:
82-87
栏目:
职业安全卫生管理与技术
出版日期:
2018-10-31

文章信息/Info

Title:
Analysis and control of inservice welding stress for X80 natural gas pipeline
文章编号:
1673-193X(2018)-10-0082-06
作者:
丁雅萍1; 汤海平2; 姜修才3
（1.四川建筑职业技术学院 交通与市政工程系，四川 成都 610399;2.西南石油大学 机电工程学院，四川 成都 610500;3.中国石油天然气管道局维抢修分公司, 河北 廊坊 065000）
Author(s):
DING Yaping1;  TANG Haiping2;  JIANG Xiucai3
(1. Department of Traffic and Municipal Engineering, Sichuan College of Architectural Technology, Chengdu Sichuan 610399, China;2. School of Mechatronic Engineering, Southwest Petroleum University, Chengdu Sichuan 610500, China;3. China Petroleum Pipeline Bureau Maintenance and Repair Branch, Langfang Hebei 065000, China)
关键词:
X80天然气管道;  在役焊接;  焊接应力;  数值分析
Keywords:
X80 natural gas pipeline;  inservice welding;  welding stress;  numerical simulation
分类号:
X937
DOI:
10.11731/j.issn.1673-193x.2018.10.013
文献标志码:
A
摘要:
为了探究X80天然气管道在役焊接的应力分布和变化规律，在考虑天然气介质的作用下，采用有限元方法模拟了X80天然气管道在役焊接应力场分布规律，分析了天然气工况参数和环境温度对X80天然气管道在役焊接应力的影响，并根据应力变化规律提出了降低X80天然气管道在役焊接应力的措施。研究结果表明：X80天然气管道轴向焊接应力和环向应力主要呈对称分布形式，且管道外壁的应力大于管道内壁上的应力；随着天然气压力和流速逐渐增大，轴向应力先增加后降低，而环向应力逐渐增大；当环境温度增大后，管道轴向和环向应力均呈下降趋势；降低天然气压力和流速、采用焊前预热能够有效降低焊接应力。研究结果可为我国X80天然气管道在役焊接安全提供参考。
Abstract:
In order to explore the distribution and change laws of inservice welding stress on X80 natural gas pipeline, the distribution laws of inservice welding stress field on X80 natural gas pipeline were simulated by using the finite element method with considering the effect of natural gas medium. The influence of operating parameters of natural gas and environmental temperature on the inservice welding stress of X80 natural gas pipeline was analyzed, and the measures to reduce the inservice welding stress of X80 natural gas pipeline were put forward according to the change laws of stress. The results showed that the axial welding stress and hoop stress of X80 natural gas pipeline mainly presented the form of symmetrical distribution, and the stress on the outer wall of the pipeline was greater than that on the inner wall. Along with the gradually increasing pressure and flow velocity of natural gas, the axial stress increased first and then decreased, while the hoop stress increased gradually. When the environmental temperature increased, both the axial and hoop stress of the pipeline decreased. Therefore, the welding stress could be effectively reduced by reducing the pressure and flow velocity of natural gas and adopting the preheating before welding. The results can provide the reference for the safety of inservice welding on X80 natural gas pipelines in China.

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备注/Memo

备注/Memo:
收稿日期： 2018-08-04
基金项目： 国家重点研发计划项目（2016YFC0802100）; 四川建筑职业技术学院科技项目（2017KJ14）
作者简介： 丁雅萍，硕士，讲师，主要研究方向为油气管道输送安全技术。
通信作者： 汤海平，博士研究生，主要研究方向为油气管道输送安全技术。
更新日期/Last Update: 2018-11-07