State-of-the-Art Review of the Assessment Qualification and use of Mechanically Lined Pipes (MLP)
Status: Completed
Date Announced: January, 2020
Project reference: JIP33529 (Ex PROP305017)
Bimetallic pipes are used in oil and gas (O&G) offshore units when production fluids are corrosive. Mechanically lined pipes (MLP) are one configuration of bimetallic pipes where a corrosion resistant alloy (CRA) liner is inserted into the backing carbon steel pipe, and CRA weld overlay is used to seal the pipe ends.
There are some specifications for the manufacture of MLPs, and some guidance on how to qualify them, but the information is incomplete, and not universally adopted. A review of current and emerging practices and existing specifications is essential to confirm the current state-of-the-art for the manufacture and safe use of MLP, which have significant differences to conventional cladded or overlaid products.
This joint industry project starts with a review of MLP technology, which will provide a broad overview to TWI Members on the state of the art.
The review will also enable TWI to identify gaps in existing guidance and focus research in this active area with the ultimate goal of developing comprehensive and specific guidelines for the assessment, qualification and use of MLPs