BorCoat - pipeline protection systems
Maximising the service life and reliability of steel pipelines for transporting oil and gas, requires robust coating systems that deliver long-term protection against a range of threats, such as:
- Corrosion and abrasion
- Mechanical impacts
- Chemicals in and outside the pipe
- UV radiation
- Thermal stresses due to temperature variations
- Environmental stress cracking
Borcoat™ polyolefin-based coating systems from Borouge and Borealis not only protect steel pipes from these risks, but also raise the level of protective performance.
Compared to conventional fusion bond epoxy (FBE), multi-layered FBE, and generic unimodal PE-based coatings, Borcoat brings greater efficiency to long-term pipeline protection, coating production, application and maintenance.
Borcoat bimodal high density polyethylene (HDPE) pipe coating materials are produced using Borealis’ proprietary, advanced bimodal technology. This enhances the materials’ mechanical and heat deformation properties and improves the processability.
The performance of Borcoat is further enhanced, when it is combined with a Borcoat grafted PE adhesive, to tie the HDPE top coat to the epoxy primer in a three-component (3LPE coating) system.
For pipe coaters and applicators, Borcoat has the following advantages:
- Improved melt strength and draw down
- Outstanding processability and coating output
- Low shrinkage and productivity
- Excellent surface finish
- High bond strength
For the pipe layer and pipeline operator, Borcoat solutions deliver:
- Improved impact resistance
- Better environmental and weathering resistance
- Ability to withstand low and elevated service temperatures (-45°C to 90°C)
- Greater indentation and abrasion resistance
- Higher resistance to stress cracking and stress crack propagation
- Better ageing performance and longer working life
In-service temperatures of up to 110°C
Borouge offers a Borcoat polypropylene (PP) white top coat for onshore pipelines coated with a three-component system that must withstand in-service temperatures of up to 110°C. Combined with a high temperature compatible Borcoat grafted adhesive, the white PP top coat provides excellent thermal ageing resistance and UV protection.
Challenging offshore pipeline projects
Borouge offers a family of Borcoat polypropylene insulation coatings for challenging multi-layered thermal insulation systems. The Borcoat PP thermal coating materials and dedicated Borcoat grafted adhesives are excellent for multi-component (4LPP, 5LPP or 7LPP) systems.
Borcoat standard, as well as low temperature (LT) PP compounds, provide good insulation against extreme temperatures (-20°C to 140°C for offshore and -20°C to 110°C for onshore). Borcoat foam PP and syntactic PP insulation grades have the high compressive strength necessary to resist the pressures associated with deepwater installations.
Unique WehoCoat™ field joint coating system
On-site coating of welded pipe joints with conventional sleeves or tapes, constitutes a potential weak spot for moisture ingress and corrosion in 3LPO coated steel pipeline projects. The fully automated WehoCoat™ system counters this risk. The device first heats the area around the weld using induction heating. Then it sequentially applies epoxy and the special WehoCoat™ PE or PP. The latter is a reactive top coat that bonds to the epoxy layer very well and provides mechanical protection similar to that of a conventional factory applied 3LPO coating.
What makes WehoCoat unique?
- It completely fuses the PE WehoCoat™ with the parent coating in the cutback area, making a monolithic joint.
- The fully automated process ensures that each joint coating is of consistently high quality.
- It ensures that the bond strength of the field joint coating with the steel pipe, as well as with the parent coating, not only meets pipe line coating specifications, but also exceeds conventional field joint coating specifications.