Pipeline anticorrosive coatings
See also: Building, Construction and Infrastructure
What it is
Pipeline anticorrosive coating is the protective layer applied externally (and in some cases internally) on oil, gas, water and other fluid transport pipelines, preventing metal corrosion over decades of service. PU coating competes with other traditional technologies (coal tar, FBE — Fusion Bonded Epoxy, 3-layer PE) and grows in specific applications.
PU systems for pipelines are divided into:
- Factory external coatings (linepipe coating): applied on new pipes before installation
- Field coatings (field joint coating): applied on welded joints during installation
- Retrofit coatings: applied on existing pipelines for life extension
- Internal coatings: applied internally to reduce friction, internal corrosion, contaminant adherence
The advantage of PU is the combination of:
- Excellent protection against corrosion
- Mechanical resistance to impacts (important during installation)
- Flexibility (accommodates pipeline bending)
- Chemical resistance
- Field application (repair and field joints)
Why it matters
Pipelines are among the most expensive and critical assets of global infrastructure — a subsea pipeline can cost millions of dollars per kilometer and needs to operate for 30 years or more. Anticorrosive coating failure leads to leaks, which cost extremely high (production shutdown, repair, environmental impact, regulatory fines).
For pipeline operators (Petrobras, Shell, TotalEnergies, Gazprom), the chosen coating is an engineering decision with decades-long impact. Specifications are rigorous and supplier qualification is a long and expensive process.
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