Plant Maintenance


New maintenance technologies have been attracting attention in view of environmental conservation, lifecycle costs saving, safety management and facility maintenance (continuous operation). Based on the concepts of RBI(*1) and RBM(*2), TOYO supports the planning and the activity of maintenance for your plants.

*1Risk Based Inspection (RBI): The method to determine inspection plan (inspected point and frequency) to optimize plant safety and economic efficiency based on the risk defined as the product of the probability of failure in the equipment and piping and the consequence of the failure.
*2Risk Based Maintenance (RBM): A maintenance planning method based on risk analysis. For RBM, it refers to the overall plant maintenance technologies. RBM is used frequently these days because the plant maintenance technology also includes repair and replacement.


Plant maintenance based on the concept of RBI/RBM

TOYO jointly developed the RBI evaluation tool that considers the unique mode of damage mechanism to urea plants together with ESR Technology in the United Kingdom, for urea plants which is TOYO’s proprietary licensing process technology.

Conceptual diagram of RBI/RBM

Conceptual diagram of RBI/RBM

Equipment evaluation and diagnosis by FFS

We diagnose equipment that employs the FFS(*3) technology, a representative example of which is API 579-1/ASME FFS-1.

*3Fitness for Service (FFS): A method for evaluating applicability of component and estimating service life when general or local corrosion and/or cracks are found in equipment and piping.
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