Safety assessment of corroded jacket platform considering decommissioning event

Abstract

Continuous assessment of aged offshore structures is becoming extremely important to avoid any hazardous consequences throughout their design life. In Malaysian waters where most of the offshore structures are jacket platforms, it was found that many of these structures are currently operating beyond their design life. With continuous corrosion taking place, structural reliability and operation will be affected. Therefore, for the safety evaluation, this study focuses on the reassessment of an existing aged jacket platform in Malaysian waters pertaining to corrosion effect. In this study, pushover analysis was carried out to determine the ultimate strength of the corroded jacket platform by quantifying the reserve strength ratio value. Two different time-dependent corrosion wastage models were used in the present study to simulate the corrosion behaviour at the splash zone of the jacket platform. It was observed that average corrosion condition relatively simulated the calm waters of Malaysia and by applying this corrosion, the jacket platform can withstand the environmental load acting on it. The results developed in the present study will be useful for future study in predicting and modelling corrosion tolerance of jacket platforms in Malaysian waters.

Ultimate bending capacity of aged fixed platform by considering the effect of marine fouling

“…Other significant findings on corrosion modelling are developed by Yamamoto and Ikegami (1998), Paik et al (1998), Guedes Soares and Garbatov (1999), Qin and Cui (2003) and Melchers (2008). Recently, a number of studies have also been conducted to predict the progress of corrosion damage by Paik and Kim (2012), Mohd Hairil et al (2014) and Kim et al (2017). These studies have contributed to a more detailed understanding of how corrosion on ships and offshore structures works.…”

Reliability Assessment for Corroded Pipelines in Series Considering Length-Scale Effects

“…A technical review of application studies on ultimate strength analysis of corroded structures has been conducted by Wang et al [18]. In particular, many researchers have investigated on the degradation of ultimate strength behaviour of ships and offshore structures by considering the time-dependent corrosion damage such as container ship [19], oil tanker [20][21][22][23], bulk carrier [24] and fixed jacket platform [25].…”

Implementation of Safety Performance Framework (SPF) In Process Industries to Avoid Disasters

“…Whereas, safety performance index (SPI) along with LeadI for each section have been determined according to Eq. (1), (2), and (3) respectively.…”

“…larger process plant size, complex automation system, new materials/chemicals etc. increases the potential for industrial disasters [1,2]. These disasters are usually occurred by the virtue of hazardous chemicals in the form of toxic, reactive, flammable, explosive, or a combination of these properties.…”