DiamondWrap® Subsea™ Epoxy System

DiamondWrap® SubSea™ is the premier carbon fiber wrap system used to rehabilitate and restore original operational strength to damaged, corroded and eroded underwater piping systems. 

DiamondWrap® SubSea™ is engineered to provide strength that enables a submerged pipe to be restored to maximum allowable operating pressure (MAOP) without shutting down. The system is comprised of the three components, each thoroughly and independently tested at both the university and international laboratory level. The first component is an epoxy primer, which ensures complete bonding and load transfer between the repair and the substrate. The second component and most unique feature of the DiamondWrap® SubSea™ system, is its selection of bi-directional woven carbon-fiber materials, which provides reinforcement in the hoop and axial directions and is the strongest available non-metallic repair on the market. The third part of the binding force in the system is the polymeric epoxy resin, which allows for uniform loading thorough the entire wrap. For repairs that require surfaces to be modified (e.g.: heavy pitting or irregular shapes), the high modulus filler can be applied. These components form a composite system that is stronger than steel. The structural system forms a pipe around a pipe, and each successive wrap increases the pressure rating. Minimal creep ensures a long service life.

DiamondWrap® SubSea™ requires an engineering assessment to compile service information such as substrate material, wall loss, operating temperature, pressure ranges and environment exposure. Because of its wet lay-up and low profile, DiamondWrap® SubSea™ can be installed on tees, elbows, straight runs of pipe, confined spaces and irregular surfaces that require structural reinforcement or leak containment. The adhesive properties of the epoxy allow it to be applied to most substrates. The epoxy must be mixed and applied above water before it is transported underwater to the site of the repair.


  • Suitable for subsea pipelines, risers, and piping systems
  • Excellent adhesion to virtually any substrate
  • Straight length, elbows, tees, valves, fittings, vessels
  • Restores pipe strength to MAOP
  • Minimal creep ensures a long service life
  • No VOCs
  • Prevents future external corrosion
  • Strong chemical resistance
  • Supplied as a complete kit
  • Quick and easy installation

DiamondWrap® SubSea™ is compliant to DOT regulation, ASME B31, .8, .4, .G and PCC-2 Art 4.1, 4.2 and API 570. Please refer to API 570, Section 8.1.4 – Non-welding Repairs (On-Stream)
Refer to peer-reviewed journal paper for further reference and qualification!

DiamondWrap SubSea Epoxy System

Citadel Technologies
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