DIRECT ANSWERCorrosion allowance follows the actual medium composition, phase, water and contaminants, temperature, flow, expected life, corrosion study, lining/cladding and inspection strategy.
Corrosion-basis inputs
- Composition, phase, contaminants and water
- Temperature, velocity, erosion and dead zones
- Design life and corrosion-rate basis
- Lining/cladding, monitoring and maintenance
Relevant manufacturing capability
- Drawing, datasheet and equipment-list manufacturability review
- Self-manufactured and coordinated-supply scope identification
- Technical, quality, document and delivery clarification
Key notes
- A generic allowance copied from another project can be unsafe or uneconomic.