Integrity Operating Windows (IOWs) are a key component of a world class mechanical integrity program.
IOWs are not a new concept, as they have been around in different forms for many years. However, with the publication of the first edition of API RP 584, Integrity Operating Windows, in 2014 and the more recent first edition of API 970, Corrosion Control Documents, in 2018, more focus has been placed on these limits within the refining industry.
IOWs can be defined as established limits for process parameters that affect the integrity of equipment and piping when operations deviate from these limits. API 584 defines IOWs in three categories:
While setting these limits for a given process requires significant effort and technical knowledge, the effort to integrate IOWs into other facility work processes beyond the impact to the inspection program where limits have been exceeded, is often overlooked. The examples below focus on Process Safety Management (PSM) systems where IOWs should also be integrated.
Becht Engineering’s Pono Division is highly experienced in development and implementation of IOW programs. Becht Engineering has the industry leading group of Metallurgical/Corrosion experts who have over 300 years of combined experience within industry, mainly as owner-users. Additionally, our group of mechanical integrity experts have implemented IOW programs at the site and corporate level of many different companies. Our insight on the link between integrity operating windows, damage mechanisms, and process safety management makes Becht uniquely qualified to provide insight in this area.
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Matthew Caserta is a registered professional engineer in the states of Ohio and Texas and has over 15 years of a wide breadth of engineering experience in chemical processing, oil refining, and consulting. Mr. Caserta's varied background provides unique insights into process interactions, equipment reliability and corrosion and materials concerns. The past 10 years of Mr. Caserta's career has focused on fixed equipment reliability and inspection, as well as Mechanical Integrity.
He has been involved in risk-based inspection assessments, mechanical integrity audits, and process engineering. He has a strong knowledge of damage mechanisms through practical experience. He has experience as a Chief Inspector planning and executing turnarounds, supervising day-to-day inspection needs, and managing projects.
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