Annulus line clamp inserts are used in oil & gas applications to secure smaller annulus lines alongside larger risers and pipework, particularly in subsea and offshore equipment. The insert sits between the metal clamp and the annulus line, providing a controlled interface that helps hold the line in position while accommodating movement, vibration, and thermal expansion. By providing a protective contact surface, the insert helps minimise direct metal-to-pipe contact and reduces the potential for wear or damage to the annulus line during operation.
Sustadur PET provides a combination of strength, stiffness, and dimensional stability that makes it well suited to clamp insert applications. Its low moisture absorption helps maintain dimensional stability in wet and subsea environments, while its excellent wear characteristics allow the insert to withstand repeated contact and movement. Where lower friction and improved sliding performance are required, Sustadur PET GLD 130 incorporates an internal lubricant to further reduce friction and wear, making it a suitable option where relative movement occurs between the clamp insert and annulus line.
Dotmar Engineering Plastics can manufacture precision annulus line clamp inserts to suit specific equipment and installation requirements. Components can be produced from customer drawings, samples or existing parts using CNC machining, while Dotmar's 3D scanning and reverse engineering capabilities allow existing or obsolete inserts to be accurately captured and reproduced where original drawings are unavailable. Combined with engineering plastics material selection, Dotmar can help identify the most appropriate grade and manufacture replacement components designed to provide reliable wear performance and dimensional stability in demanding offshore environments.
