The purpose of the pipeline pigging is clear in pipe welding of mud, welding slags sundry, for pipeline caliper and normal operation of pipeline to provide security.
管线清管的目的是清除焊接时留在管道内的泥沙、焊渣等杂物，为管线测径和管线正常运行提供保障。
Because of the particularity of the medium and material, our knowledge of corrosivity of sea mud and behavior of pipeline steel exposed in it is not enough.
由于介质和材料的特殊性，人们对海泥的腐蚀性和管线钢在其中的腐蚀行为了解得还不太深入和系统。
Several aluminium alloy sacrificial anodes used to protect the pipeline laid in sea bed mud were measured, two sacrificial anode materials having excellent performances were obtained.
测试了几种用于海泥中海底输油管线保护的铝合金牺牲阳极的电化学性能。
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