• frequently asked questions REINFORCEKiT-4D


Brief Product Presentation

Composite repair for pipe reinforcement and damaged pipe suffering from internal and external corrosion, dents, weld defects, mechanical damages, leakages ...

Wet lay-up system wrapped helicoidally around the pipe in order to bring the mechanical resistance to the damaged pipe section.

Composite sleeve made of Kevlar® tape and 3X specific epoxy resin.

Because Kevlar® tape has lots of advantages compared to carbon fiber or fiberglass:

  • Strong but not rigid
  • Non-conductive
  • Abrasion resistant
  • No galvanic effect or cathodic protection issue
  • High mechanical properties
  • Non-hazardous for users (it can be handled without any risk for the applicator)
  • High strain at failure allows the composite sleeve deformation according to pipe elongation
  • Large range of application (applicable on welds, oval pipes …) and available in various width sizes (25, 50, 100 & 300mm)

Our composite products have been designed according to international standards ISO 24.817 and ASME PCC-2.

REINFORCEKiT® 4D range of product can be used for unlimited pressure and temperatures ranging from -50°C to +150°C (-58°F to +302°F). A specific one is dedicated to subsea application (REINFORCEKiT® 4D SUBSEA).

REINFORCEKiT® 4D is a very versatile product and can be installed on all kind of pipe geometry (straight, oval, elbow, tee) also including weld, dent or leaking defect and transporting most common fluids (oil, water) and gas.

REINFORCEKiT® 4D can be installed on all pipe diameters and all environments (onshore, offshore and subsea).

Yes, a good surface preparation is essential to get optimal resin bonding and guarantee the sustainability of the repair. The prepared surface should match with Sa2½ or St3 standards and roughness reaches at least 60 microns (Rz). It can be done using grit blasting or Bristle Blasting (MONTI technology distributed in France by 3X).

Yes, R4D technology can be applied without shutdown except if through wall defect. It is one of the main benefits of this technology because it avoids costly shutdown and production loss. In case of leakage, the process must be temporarily decreased or stopped.

According to defect characteristics and if the product is applied by 3X specialists or certified applicators with a prior good surface preparation, the repair is designed for a lifetime of 20 years. This cannot be guaranteed in case of internal defect because it is impossible to plan the evolution of the defect.

No heating or post-curing is required. The curing will be done naturally at ambient temperature. However curing time can be shortened if needed (please refer to the Technical Data Sheet for values).

The number of layers depends on several parameters (defect type, kind of pipe, original diameter, wall thickness, design pressure, temperature, environment ...).

3X ENGINEERING has developed its own software called REINFORCEKiT ENGINEERING ANALYSIS (R.E.A) to design the composite repair and define the number of layers and material requirements in accordance with existing international standards. In case of dent or specific requirements, 3X can provide Finite Element Analysis (F.E.A) simulation to design the repair or to comply with clients’ own standards.


  • No shutdown required for R4D repair (except in case of leakage).


  • REINFORCEKiT® 4D repairs internal and external corrosion, weld defects, leaks, dents, mechanical damages...
  • REINFORCEKiT® 4D repairs all pipe diameters with no pressure restriction.
  • REINFORCEKiT® 4D repairs all pipe geometries (straight, oval, elbow, tee …) transporting various fluids and gases.
  • REINFORCEKiT® 4D repairs pipe operating up to 150°C (302°F).
  • REINFORCEKiT® 4D repairs pipe in onshore, offshore or subsea environments.


  • Light product, no overload on corroded pipelines.
  • No hot work.
  • No heating or post-curing required.
  • Fiber not hazardous for user.