关键词: 长输管道, 长钢管, 18 m, 12 m, 直接效益, 间接效益, 焊接费用

Abstract: At present, in the construction of long-distance oil and gas pipeline, a single 12 meters long steel pipe (hereinafter referred to as 12 m pipe) is mostly put into use, and a single 18 meters long steel pipe (hereinafter referred to as 18 m pipe) is gradually put into use in some projects. The differences between 18 m pipe and 12 m pipe are comprehensively compared in terms of direct economic benefits and indirect safety and quality benefits. This paper takes a section of 100 km pipeline as an example, the direct economic benefits are quantitatively analyzed from four aspects: production cost, transportation cost, construction measure cost and construction butt welding cost. The investment saved by using 18 m pipe is 4.760 1 million yuan. Although limited by the use of terrain, logistics and other problems, 18 m pipe has the advantages of reducing the number of welding joints, saving investment cost, improving construction efficiency and operation safety, and the larger the diameter of oil pipeline, the more cost savings. In coastal and other areas with developed logistics and transportation and flat installation terrain, the application of 18 m pipe has certain promotion advantages.

Key words: long-distance pipeline, long steel pipe, 18 m, 12 m, direct benefit, indirect benefit, welding cost