Pu Two Unite-Pu One Unite Bury Pipeline Antiseptic Layers Of Surplus Analysis And Research Of Ability To Work

Through the scene investigating, the excavating the sample and examination, the corrosive exploration to the environment soil, the pipeline's corrosive examination and the appraisal to the locating environment of the buried oil pipeline of Pu Two-Pu One Joint Station of No.7 Oil Production Company of Daqing Oil Field, this article discovered the primary factor causing the buried pipeline anticorrosion level invalidation, and according to the environment soil's comprehensive physics and chemistry target to determine the corrosion grade of this section, grasped the invalidation rule of the pipeline anticorrosion level, researched the anticorrosion level resistivity weaken rule and its influence to the anticathode safeguard. In the research foundation, the article proposed the life formula and the invalidation criterion model which was suitable to the buried pipeline anticorrosion level, forecasted the oil field's buried pipeline anticorrosion level's years of again using, and put forward the science reasonable proposal for the service and replacement of the buried pipeline anticorrosion level of Pu Two-Pu One Joint Station.This article gathered the data of Pu Two-Pu One Joint Station pipeline anticorrosion level aging and damaging, analyzed many factors such as the soil type, the resistivity, the water content, the PH valve, the salt content, the chloride ion content, the sulfate radical ion content and pipe to soil potential, and carried on the corrosive investigation and appraisal to the soil; configurated the corrosiveness consistent with the etching solution, carried on the laboratory simulation experiment to the damaging and aging of the polyurethane forth polyethylene jacket level, in order to determine the index relations between anticorrosion level resistivity and weakened time. Under the normal anticathode safeguard and the anticorrosion level surface complete condition, according to the anticorrosion level resistivity weaken rule and its influence to the anticathode safeguard, established the pipeline anticorrosion level life formula and the invalidation criterion model. This article puts forward the science reasonable proposal to the service to the pipeline anticorrosion level of Pu Two-Pu One Joint Station.