Research On Risk Identification Technology Based On Knowledge For Pressure Piping And Pressure Vessel On Offshore Platform

The structure of the offshore platform is compact,the environment is relatively bad,the equipment is high load and overdue service,which makes the safety accidents happen,the number of non-planned parking increases obviously,and the long cycle safe operation of the equipment faces great challenges.Once the equipment failure will bring serious consequences,not only lead to casualties,bring huge economic losses to the enterprise,but also cause irreversible damage to the environment.Equipment integrity management is based on the information of equipment that comes from monitoring and inspecting.Taking the risk assessment of unfavorable factors which can affect the failure of the equipment,and carrying out the integrity evaluation for the equipment,it can reduce and prevent the occurrence of equipment accidents,and guarantee the safe operation of the equipment.This paper mainly studies the integrity management technology of pressure vessels and pressure pipes by means of RBI technology.Based on API 581,the qualitative and quantitative analysis methods of RBI are described in detail.Based on the knowledge and experience summarized by the predecessors,a method for formulating the inspection strategy is proposed.Based on analytic hierarchy process(AHP),the factors affecting the failure of equipment are studied,and a method for determining the failure level of equipment is proposed.At the same time,the risk assessment of an offshore platform is carried out by using RBI software,and the effectiveness of the above methods is verified.(1)Based on the knowledge and experience summarized by the predecessors,the RBI knowledge base of the offshore platform is established.The corrosion mechanism and damage mechanism are determined through the corrosion characteristic parameters and corrosion morphology,and an effective inspection strategy is formulated,which provides an effective tool for the operator of the offshore platform for the health management of the pressure equipment;(2)Based on the analytic hierarchy process(AHP),the consequences of equipment failure are studied,and the failure consequence grade is calculated;(3)The discharge tank of a offshore platform is selected as a representative pressure vessel.The results of risk assessment through RBI software analysis and RBI based knowledge base are compared to verify the effectiveness of the knowledge based risk identification technology for offshore platform pressure vessels and pipelines.