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阿拉斯加北部开采的石油,用直径1,220mm,长1,280km的管线送往互尔捷兹港。大约占线路一半的管线在永久冻土地区,在野兽通行的路途与线路交叉点和五个泵站的管线必须地下敷设。为防止管线中温度在35～60℃的泵站下面的永久冻土溶解,安装了土壤冻结装置(利用被冷却的盐水沿环状地下管道系统循环)。为减少从主管道向土壤中散热,管线放置在原75～100mm的泡沫聚胺酯外壳中,外壳上涂以3mm厚的防水聚乙烯层,壳体制成两个半圆型,焊上纵向板条或用专用钢带使壳体固定在管道上。在管子金属表面上只有环氧树脂漆等涂料,在管子接口端头(用于焊接处)没有涂料。这条管道在
Oil from northern Alaska is sent to Port-el-Jerez using 1,220-mm-long pipes 1,280 km long. The pipeline, which takes up about half of the line, must be laid underground in the permafrost, at the intersection of the beast traffic and the route, and at the five pumping stations. To prevent permafrost dissolution below the pumping station at 35-60 ° C in the pipeline, a soil freezing device (circulated along a ring of underground piping using cooled brine) was installed. In order to reduce the heat dissipation from the main pipeline to the soil, the pipeline is placed in the original polyurethane foam shell of 75 ~ 100mm, the shell is coated with a 3mm thick waterproof polyethylene layer, the shell is made into two semicircles, The steel strip secures the housing to the pipe. There is only a coating of epoxy paint on the tube metal surface, no coating on the end of the tube connection (for welding). This pipe is