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。
Crackings occurred three times in elbow bend since one domestic long distance gas transportation pipeline came to used in 1993.
国内某长距离煤气输送管道于1993年投入运行以来，先后三次在管道弯头部位出现裂纹，导致煤气泄漏。
A long distance transportation pipeline SCADA system is designed based on it.
在此基础上，实现了长输管线的SCADA系统。
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