By combining GPS satellite positioning system electronic maps can be achieved on the guide tube, control and distance. Combined with topographic maps produced by the vector electronic map, to be able to pipe, clear and intuitive display of terrain out of the pipeline for future maintenance, repair and provide scientific basis.
Coating’s Insulation resistance testing
Soil resistivity and conductivity are important indicators of soil conductivity, soil resistance and soil resistivity inversely relationship with resistance was a positive relationship between electrical conductivity. Therefore, soil resistivity of soil physical properties reflect a comprehensive index, which indicates the severity of soil erosion is the location of cathodic protection and soil erosion investigations are mandatory testing items. In particular, the focal point of corrosion, through the difficulties, it needs to strengthen management and take the necessary protective measures.
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