Corrosion Reviews

Equity offers different levels of corrosion reviews either associated with RBI or FFS, or as stand-alone reviews. The levels increase in the complexity of detail and time required to perform them. Each has its own cost-benefit ratio, and we will help guide you in determining which type of review is most appropriate for your needs.

PFD Level

Materials/corrosion reviews as part of RBI projects – Selecting the applicable damage mechanisms, estimating corrosion rates and susceptibilities for SCC and other cracking mechanisms for fixed equipment and piping systems; it focuses on primary mechanisms and first order effects.

Materials Operating Envelopes (MOEs) – Determining limits and boundaries of operating parameters, such as feed contaminants, temperatures, pH, water wash rates, stream velocities, etc. This technology defines corrosion control activities and addresses stream sampling, analysis, corrosion probes and other monitoring activities. This includes parameters that can be controlled and those that should simply be monitored for trends. MOEs are often performed after RBI has been implemented, but they can also be done prior to the initiation of RBI. Another variant on this technology is key process reliability parameters.

Specialty items – HF acid alkylation -best practice operating and inspection guidelines and benchmarking, crude corrosivity screening - for crude selection, determining the correct alloy upgrades and monitoring requirements, etc.

P & ID and Circuit Level

More detailed materials, corrosion and inspection data reviews - Determining ideal common corrosion circuit boundaries, and assigning damage mechanisms, corrosion rates and susceptibilities. These reviews are typically performed on a node-to-node basis similar to hazards analysis.

Advanced corrosion reviews looking for secondary effects - Often performed in conjunction with a group of experienced process consultants that we retained as part of the team to examine process opportunities.

Corrosion Reviews vary for each study and customer, but generally use databases, charts and tables to summarize information rather than extensive prose that gets filed away. As part of these Corrosion Reviews, we can overlay PFDs or other electronic drawings with damage mechanism information – materials, corrosion rates, susceptibilities and more – all in color coding. We can also customize our VCEDamage Mechanisms™ software by including these drawings.