CCD & IOW

Equity Engineering develops Corrosion Control Documents (CCDs) and Integrity Operating Windows (IOWs) aligned with API 970 and API 584 to extend an asset’s lifecycle. These proactive solutions manage all damage mechanisms and operating limits for fixed equipment, minimizing the risk of process leaks and costly unplanned shutdowns.

Download the Materials & Corrosion Overview here.

What’s your process for monitoring equipment limits?

Corrosion control documents (CCDs) and integrity operating windows (IOWs) manage fixed equipment damage mechanisms and establish optimum operating ranges for specific equipment. Refineries, petrochemical, chemical, and other industrial processing facilities all benefit from implementing IOWs and CCDs to prevent failures, optimize production, and extend an asset’s life span.

API RP 970 provides recommendations on developing, applying, and maintaining CCDs; however, the recommendations generally remain at the owner’s discretion. Up-to-date documentation improves inspection effectiveness and turnaround planning and, most importantly, minimizes the risk of process leaks and unplanned shutdowns. Equity will help you develop site-specific IOWs and CCDs using API 970 and API 584 as guidelines.

Why do you need IOWs and CCDs?

CCDs and IOWs strengthen and enhance mechanical integrity and risk-based inspection (RBI) programs at a facility. CCDs document the specifics of managing the degradation of a unit for operations, technical, inspection, and integrity personnel. IOWs provide a recommended response or monitoring action when process units exceed the established operational limits.

Proactive tools that:

  • Manage damage rates, create operating limits, and establish monitoring programs
  • Support turnaround planning and shutdown/start-up strategies
  • Provide recommendations for equipment upgrades, replacements, and process changes

» CCDs and IOWs are reliability tools that help move a plant organization from reactive to proactive.

IOWs

IOWs provide actionable steps to all employees if and when equipment exceeds the recommended limits.

  • Establish limits for process equipment to maintain integrity and improve reliability
  • Promote predictable damage rates
  • Minimize risk of process leaks and unplanned shutdowns

CCDs

CCDs summarize a process unit’s most likely damage mechanisms by breaking the unit into corrosion systems or loops.

  • IOWs are (or should be) a subset and an integral part of an effective CCD
  • CCDs should be developed as a precursor to a risk-based inspection (RBI) program
  • CCDs should cover all fixed equipment in a process unit, not only vessels

Related Topics

  • “Equity Engineering has done a great job providing CCDs. They communicated well on what information was needed and produced solid work.”

    – CCDs & IOWs, North American Refinery

  • “It is always a pleasure working with this team. They were all very professional and demonstrated solid technical knowledge and experience. Well done!”

    – Omega Creep Testing, North American Refinery

  • “Equity has consistently provided our global company with excellent support, especially during emergency situations.”

    – Weld Repair Project, Latin America Refinery

  • “Appreciate the detail of analysis that was performed and the research done to understand the system in order to understand the root cause for the failure.”

    – Failure Analysis, North American Chemical Facility

  • “Have had good experiences with this job and others. I find Equity very supportive and honest.”

    – Weld Repair Project, Nitrogen/Fertilizer Manufacturer

  • “All personnel were very professional and resolved the matters in a timely fashion. We continue to utilize Equity Engineering. We did it again during our current turnaround event at our Louisiana site involving a fitness for service.”

    – Structural Stability Assessment, Louisiana, USA

  • “Equity Engineering went above and beyond to assist with our GOH vibration study. They completed the work in a timely manner, kept me informed, and delivered a great final report.”

    – Vibration Clamp Design, Texas, USA

  • “Equity has consistently provided our global company with excellent support.”

    – Weld Repair Project, Latin American Refinery

  • “The work that the team did was very valuable. The whole team demonstrated great knowledge and professionalism.”

    – Wind-Induced Vibration Analysis, European Refinery

  • “I have been collaborating with Equity Engineering for many years and every time I have been extremely happy with their knowledge, professionalism, and dedication.”

    – Fitness-for-Service Assessment, North American Refinery