Composite Repairs

Introduction to Composite Repairs (An Alternative to Weld Repairs)
  • Belzona composite repairs give strength to weakened or holed pipes, vessels, tanks and structures. The systems can be engineered, applied in situ and are a cold curing repair method. Belzona composite repairs have the following advantages: 


  1. On/off line repair systems
  2. No need of hot work
  3. Surface tolerant options
  4. Rapid return to service
  5. International standard compliant repair option 
  •  Composite repairs are basically the repair systems made up of a thermoset resin used in conjunction with glass or carbon fibre reinforcement. This reinforcement can be a mixture of the two materials or made of something else entirely.
  •  Can be a mixture of the two materials or made of something else entirely.

Composite Repairs Can Be Defined by the following features:


  • Strong Mechanical Adhesion.

The resins generally have good adhesion to a variety of substrates, giving an inter-locking finish which holds the repair in place.

  • Low Tendency To Creep.

Corrosion that begins outside the repair area does not easily travel underneath the composite system.

  • High HDT Values.

The resins don't soften until higher temperatures, meaning application at elevated temperatures is possible, even when high pressures and forces are involved.

  • High Heat Resistance.

The resins which Belzona offer can see a service temperature of up to 150C (320F), and some other resins can potentially go even higher.

  • Extremely Durable.

As well as possessing heat resistance, the resins also have good mechanical strength - including impact, compressive and tensile resistances.

External & Internal Erosive Forces & Corrosive Substances Can Lead To Pitting & Thin-Wall Defects.


If not addressed soon enough, they are likely to go through-wall.

All these effects can act individually or in concert, leading to damage to the asset wall in the form of metal loss or actual rupture. The implication of a leak extends beyond just the monetary value of the fluids in the asset.

Leak also imply operational shutdowns and environmental impacts with potentially disastrous consequences. For these reasons it is paramount that asset owners and operators take a preventative approach and proactively mantain their assets, thus preventing catastrophic failures.

In the past, typical repairs to such damages included the employment of welded protective sleeves, engineered clamps or actual replacement of the defective section.

In present time though, the use of composite solutions for pipelines repairs has been gaining greater support and interest among asset owners and equipment operators. This is due not only to the fact that these repairs provide a cold applied, engineered, durable and affordable solution but also because they comply with worldwide recognized standards such as ASME PCC 2 and ISO 24817