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开都河穿越是库鄯输油管道一个大型穿越工程。工程采用了穿越速度快、管道埋深大、定位准确、对环境影响小的水平定向钻穿越方式。比较详细地介绍了施工技术和在工程质量控制方面所采取的措施。为避免低温焊接出现微裂纹,采取了焊前预热的措施;为保证回拖管道的防腐质量和管道使用寿命,选用两种美国产、专门用于河流水平定向钻穿越的热收缩套补口。为控制焊接质量,进行了试件检验及100％X光射线探伤和100％超声波探伤;为控制补口质量,除外观检查还进行了高压针孔检漏、防腐层剥离实验。在焊接、补口、检验完毕及管道回拖后进行了水压试验。通过一系列技术措施,使穿越工程顺利完成。
Kaidu River through the reservoir is a large oil pipeline crossing project. The project adopts horizontal directional drilling through the fast speed, large buried pipe, accurate positioning, small impact on the environment. Introduced in detail the construction technology and engineering quality control measures taken. In order to avoid the occurrence of micro-cracks in the low-temperature welding, pre-welding preheat measures taken to ensure that the quality of anti-corrosion pipeline back to the pipeline and the life of the pipeline, the selection of two US-made, specifically for river level directional drilling through the heat shrink sleeve fill port . In order to control the welding quality, the test of the specimen and 100% X-ray and 100% ultrasonic flaw detection were carried out. In order to control the quality of the notch, high-pressure pinhole leakage test and anti-corrosion layer peeling test were carried out in addition to the appearance inspection. In the welding, filling mouth, the inspection is completed and the pipeline drag back after a hydrostatic test. Through a series of technical measures to make it through the project successfully completed.