超声波智能清管器进行在线管道壁腐蚀缺陷检测时，经常出现误差问题。
Error usually occurs during inspection of on-line pipelines for wall-loss defects using intelligent pig.
由于灰尘和其他相关材料沿着内部管道壁，或者由于管道壁腐蚀，气体流过管道的流量剖面改变。
As dirt and other collateral material collect along an interior pipeline wall, or as the pipeline wall corrodes, the flow profile for the gas flow traveling through the pipeline changes.
利用这一模型，研究了腐蚀速率、缺陷深度、管道壁厚和工作压力等因素对管线可靠性的影响。
The effects of corrosion rate, defect depth, thickness of pipe and operation pressure on pipeline reliability were investigated with this model.
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