Recently, Changling Refining & Chemical Operations Department conducted a thorough investigation of the corrosion of pressure pipes and related pipe galleries of dangerous mediums such as propylene, liquefied gas, dry gas and hydrogen sulfide-rich hydrogen sulfide, and fully grasped the use of pressure pipelines Status, to troubleshoot operational risks, put forward suggestions for rectification and improvement and lay a solid foundation for safety management of pressure pipelines.
According to the principle of 'full responsibility for people', Changling Refinery conducts full inspection of pressure pipelines along the pipeline at different levels, workshops and departments. According to the requirements of Work Sheet, they make use of the concept of eye and combustible gas to vulcanize Hydrogen gas alarm detection approach, along the pipeline trend, or climb the tank rack, or drill pipe row, from the pipeline body to the valve, the implementation of a comprehensive inspection of pipe fittings, on-site records, marking the corrosion situation.Through investigation and found that containing hydrogen sulfide medium Of the pressure pipe there are basically different levels of external corrosion; some pipelines use a long time, the weld, tee, low point of the construction process does not meet the new requirements, the operation risk is extremely large; due to the design specifications and construction quality, part of Pipeline without custody, some low no valve, or missing flange cover, some pipe holder shift.
In view of the investigation problems, they formulated rectification plans and plans in a classification manner, made recommendations on 13 long-term and corrosive pipelines, proposed maintenance recommendations on torch management, reinforced pipe strip management, continuously monitored and monitored the operation of pressure pipelines, At present, they actively organize the relevant units rectification and maintenance within the scope of the contract and the problems left over by the construction project; organize the construction pipeline of pipeline, corridor anti-corrosion and insulation repair to determine the construction content, Estimate construction costs.
