一、概述根据我国石油工业飞速发展的需要,长距离输送石油、天然气的管道建设工程,也向大口径、高压力方面发展。由于管道材质的提高、直径增大,以及复杂的施工地形及气候,都给铺设长输管线带来了一定困难。因此,对于野外施工的焊接工艺和设备都提出了更高的要求。焊接已成为整个管道铺设中最关键的工序之一.例如,一条长1000公里的输气管线,其焊接的管接头在10万个以上。焊接速度的快慢和质量的好坏都直接影响到管道铺设速度、使用可靠性和寿命。所以,管道施工焊接设备对管线铺设、发展石油工业起着十分重要的作用。 I. Overview According to the rapid development of China’s oil industry needs, long-distance transportation of oil and natural gas pipeline construction projects, but also to large-caliber, high pressure development. Due to the improvement of the pipe material, the increase of the diameter, as well as the complicated construction topography and climate, some difficulties have been brought to laying the long-distance pipeline. Therefore, for the construction of the field of welding technology and equipment have put forward higher requirements. Welding has become one of the most critical processes in the whole pipe laying process, for example, a gas pipeline with a length of 1000 km has more than 100,000 welded joints. The speed and quality of the welding speed have a direct impact on the pipe laying speed, the use of reliability and life expectancy. Therefore, pipeline construction welding equipment laying pipelines, the development of the oil industry plays a very important role.