Summing up results of field inspection, as well as of calculation and analysis for the static force of pipelines, it is believed that the variation of steadiness concerning constant force hanger .

• 排除外在影响因素后,采用应力计算方法分析探寻其内在原因,认为恒力吊架的恒定度变化是吊点热位移无法达到设计值的主要原因。