靖安—咸阳输油管道投产技术

The Commissioning Technology Adopted in Jing'an-Xianyang Oil Pipeline

靖咸输油管道为变管径管道,有多个分输点,输送工艺为全线密闭输送。该管道沿线起伏大,且设有减压站,根据这一特点,管道投产时采用准冷投方式。介绍了该管道的投产过程,对准冷投方式的合理性进行了分析。

Jing'an-Xianyang Crude Oil Pipeline, with total length of 462. 6 km,is a reducer pipeline with several branch pipes. This oil pipeline is characterized by remarkable elevation along the line,without any pressure-reducing station installed. The cpoxy coal tar pitch is used as external coating, and polyethylene-rigid polyurethane foam as thermal insulation (t = 30 mm) with impressed current cathodic protection. According to this characteristics of the pipeline, the quasi-cold commissioning method is adopted. The pipeline's commissioning process is divided into three steps,that is pigging -with compressed air,pressure testing with water and preheating and blended oil (produced from An'sai Oilfield and Jing'an Oilfield) transportation. The thermal and/or hydraulic calculation is done and computational results display that the commissioning way is rational. The current transportation process of this pipeline is tight line transportation.