Corrosion assessment of Bach Ho - Dinh Co gas transmission pipeline and solutions for corrosion control
Abstract
Bach Ho - Dinh Co gas transmission pipeline (16” and 116.5km long) was put into operation in 1995 to transport associated gas from the Central Compression Platform (CPP) in Bach Ho field to Dinh Co Gas Processing Plant.
As gas output from Bach Ho field decreases, Vietsovpetro and Petrovietnam Gas Joint Stock Corporation (PV GAS) have considered the possibility of using this pipeline to transport gas from Dai Hung, Thien Ung, Ca Cho, Gau Chua and Dai Nguyet fields in the Nam Con Son basin to shore. The service life of Bach Ho-Dinh Co gas transmission pipeline therefore needs to be guaranteed until 2025 to meet the requirements for receiving and transporting new gas sources.
This article assesses the corrosive status of Bach Ho - Dinh Co gas pipeline system based on the design and operation parameters, updated results after survey, maintenance and repair. It also assesses the operational safety of the pipeline system when receiving gas with higher CO2 content from Thien Ung and Dai Hung fields and proposes anti-corrosion solutions.
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