Internal coatings: Why familiar systems still deserve serious scrutiny
What happened
The article warns that internal flow coatings, often treated as routine, can fail or change behaviour when formulations, shelf-life or plant qualification shift. If parameters are not specified and tested before production, projects face rework, delay and contractual disputes; buyers should add shop trials and objective acceptance checkpoints and watch for supplier change notices
Buyer takeaway
Treat coatings as tested and contractually controlled items rather than routine commodities to avoid expensive remedial work
Cost / money
Directional increase in fabrication and rework costs if coating passes fail during shop trials
Supplier / commercial
Requiring two approved alternatives reduces supplier leverage and limits single-source disruption
Safety / operations
Rework and delayed acceptance increase time in confined fabrication spaces, heightening supervision and safety exposure
What to watch
Supplier formulation, shelf-life or plant qualification statements that arrive without comparative testing are a red flag
Key facts
- Long-standing products can still change formulation or application behaviour during production
- Recommended approach: at least two approved alternatives plus comparative testing before shop
Source excerpts
Wherever practical, projects should avoid locking themselves into a single product before proper qualification is complete. At least two approved alternatives should be considered, with clear requirements for comparative testing if final approval is to occur after contract award
A product with a long history in the market can still create major issues if its formulation has shifted, its shelf-life behaviour is poorly understood, its application characteristics change in production, or the coating plant has not properly qualified it under actual project conditions
In pipeline projects, internal coatings are often pushed into the background
