In the process of transforming raw materials to products, temperature is often a major control requirement meaning that pipes or vessels are insulated. Use conditions may give rise to localized corrosion environments, such as:Ī. ![]() Spot checking will not reliably find pits, and digital radiography may not be a suitable option due to time, safety and defect size considerations.Ģ. These conditions call for large area inspection techniques that can cover large areas quickly with precision measurements, such as phased array ultrasound. In some cases, engineers should expect specific attack mechanisms such as MIC (microbial induced corrosion) or other pit developing process to take place. This case is generally well known and statistically significant inspection surveys will often suffice rather than full asset inspections. ![]() Materials in this category are most often under a comprehensive maintenance and inspection program. If a given material is passing through a given pipe or vessel, at a given set of temperatures and pressures, general corrosion is expected and predictable.
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