Abstract
AbstractSubsea pipeline is prone to the damage due to fishing activities. Bottom trawling is one of the threats to the pipeline integrity. Fishermen used bottom trawling method to catch large volume of fish and benthic along the trawl route on the seabed. This causes the trawl net to be stuck on the subsea pipeline if their activity is close to the oil and gas platform. This paper evaluates the risk of subsea pipeline fish trawling operations on the east coast of offshore Peninsular Malaysia. On-site surveys were used to establish the characteristics of trawling devices used by local trawlers in the region. Based on site survey that was conducted, the frequency of fish trawlers crossing the pipelines is estimated. The pull-over load estimate for the otter board was determined using the Det Norske Veritas Germanischer Lloyd (DNVGL) algorithm. The severity and frequency index of the risk matrix was developed based on literature review. The findings showed that the pull-over load of otter board would not damage the pipelines. The risk presented to the pipelines by the operations of fish is considered low and moderate.KeywordsRisk AssessmentTrawlSubsea pipeline
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