Case Study

Optimize Equipment Startup, Shutdown, and Operating Limits

Maintenance Engineering

Optimize Equipment Startup, Shutdown, and Operating Limits

Problem

An owner-operator wishes to optimize the startup and shutdown procedures for a hydroprocessing reactor that is susceptible to hydrogen embrittlement and temper embrittlement damage mechanisms that may increase propensity for brittle fracture.

Solution

Employ a fracture mechanics-based approach (API 579 Annex 9J) to establish the minimum allowable temperature (MAT) or minimum pressurization temperature (MPT) limits for the reactor. Based on the postulated reference flaw size utilized in the MAT/MPT assessment, establish an inspection plan focusing on the most critical locations of the equipment.

Value

  • Optimize operations with consideration for the applicable damage mechanisms.
  • Maximize production time.
  • Focus inspection plans on the most critical locations of the equipment.

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