Aimming at the safety of welding of long-distance pipeline, this paper analyzes the hazardous substance of welding process, and puts forward the relevant precautionary measures.
针对长输管道焊接过程出现的安全问题，分析了焊接过程中的有害因素，并就相关有害因素提出了防范措施。
The key in long-distance pipeline construction is welding process, long-distance pipeline construction quality is inextricably linked with quality control of welding process.
在长输管道工程施工中的关键是焊接过程，长输管道工程的施工质量好坏与焊接过程的质量控制是密不可分。
This welding process, with continuous welding wire feeding, fast deposit speed and quality welding pass, is especially suitable for long distance pipeline with large diameter and thick wall.
全位置自动焊接技术的特点是，焊丝可以连续送进，焊丝熔敷速度快，焊接质量较高，尤其适用于大口径、厚壁管的焊接。
A new welding technique on down-welding has been widely used in welding of long distance pipeline.
下向焊这种焊接新工艺在国内已广泛用于长输管道的焊接。
A reasonable selecting of welding methods and applying corresponding welding technology are the keys to ensure the welding quality of long-distance transportation pipeline.
合理的选择焊接方法和应用相应的焊接技术是保证长输管道焊接质量的关键。
Welding is an important element of the long-distance natural gas pipeline project. Welding quality affect the reliability and operational safety of the pipeline.
焊接是长输天然气管道工程中的重要环节，焊接质量关系着管道的使用可靠性和运行安全性。
It is represented to a few automatic welding modes commonly used among welding construction of long distance pipeline both at home and abroad and compared with them.
介绍了国内外长输管道焊接施工中常用的几种自动焊接方式，并对其进行了比较。
It is represented to a few automatic welding modes commonly used among welding construction of long distance pipeline both at home and abroad and compared with them.
介绍了国内外长输管道焊接施工中常用的几种自动焊接方式，并对其进行了比较。
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