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Read the whole story of…

…BIDI inspection of tanker terminal

We appreciate to share our knowledge and our experience with customers and business partners. Every pipeline inspection project presents new challenges and requires an adapted approach as well as individual technical solutions.

We have compiled this treasure trove of first-hand practical experience for you as a case study. There we describe our concept, our performance and the result of our ILI projects.


Pipeline Description: Three pipelines connect a refinery tank farm on the island of Oahu (Hawaii) with a common pipeline end manifold (PLEM) on the sea bed at a water depth of 30 m (~100 ft). The PLEM is connected with flexible hoses to the single point mooring (SPM) at the surface from where the connection to tankers is made. The pipelines serve for import of crude oil (30”) as well as export of products (16” and 20”). They extend over 1.6 km (~1mls) over land and 2.8 km (~1.8 mls) into the sea to the PLEM.  This tanker loading/unloading system has never been inspected before. Why is it challenging? There are no possibilities to install pig traps at the PLEM on the sea bed to perform a “standard” inspection from trap to trap using conventional uni-directional ILI tools. Further, the pipelines have several 1.5D/90° bends and bend combinations on the land section, passing under roads and ditches when passing through a densely developed industrial environment. Target of the inspection: Determine the presence of internal and external metal loss, geometric anomalies and other features that may affect the pipeline integrity.

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