Mechanical Integrity (MI) Software

Mechanical Integrity (MI) is the condition in which equipment, piping, pressure systems and other critical assets are designed, constructed, operated, inspected and maintained so they continue to perform their intended function safely and reliably throughout their service life. Mechanical Integrity is a fundamental element of process safety and asset integrity management. Mechanical Integrity ensures that critical equipment remains fit for service throughout its operational lifecycle.

Mechanical Integrity is achieved through engineering design, inspection, maintenance, testing, fitness-for-service assessments, and effective management systems that control equipment degradation and failure mechanisms.

Mechanical Integrity software is a digital system that centralizes asset data, inspection records, risk models, and non-conformance tracking so that equipment condition can be monitored and managed in one governed record rather than across spreadsheets and disconnected files. It typically automates inspection scheduling against code-mandated intervals, recalculates corrosion rates and remaining life as new readings come in, and connects findings directly to work orders in a CMMS. By replacing manual tracking with a single system of record, Mechanical Integrity software helps operators meet OSHA PSM and API inspection requirements while reducing the risk of missed inspections or lost data.

A Mechanical Integrity Management System (MIMS) is a structured framework of policies, processes, responsibilities and controls used to ensure that critical equipment remains fit for service throughout its lifecycle. It integrates engineering, inspection, maintenance, testing, risk assessment and performance monitoring to support safe, reliable and compliant operation. A Mechanical Integrity Management System provides the organizational framework for managing the integrity of critical physical assets. A MIMS typically incorporates asset registers, inspection programs, maintenance strategies, risk assessments, management of change, performance monitoring and continual improvement processes to support long-term equipment integrity.

A Mechanical Integrity program is generally built around a consistent set of elements:

• Asset inventory — a complete register of covered equipment (pressure vessels, piping, storage tanks, relief devices, and related fixed equipment)

• Inspection and testing — scheduled inspections performed at code-mandated or risk-based intervals (e.g., API 510/570/653)

• Risk assessment — probability- and consequence-of-failure modeling, often API 581-aligned, to prioritize inspection resources

• Deficiency/non-conformance management — a process for identifying, ranking, and correcting findings before they become failures

• Quality assurance — controls over materials, fabrication, and installation to confirm equipment is fit for service

• Training and procedures — documented, version-controlled inspection protocols and qualified personnel

• Documentation and recordkeeping — a traceable history of readings, findings, and repairs for audit and regulatory review

Fixed Equipment Mechanical Integrity (FEMI) is a subset of the broader Mechanical Integrity discipline, scoped specifically to stationary/fixed equipment — pressure vessels, piping systems, storage tanks, and heat exchangers — governed by inspection codes like API 510, 570, 653, and 579/580/581. Mechanical Integrity (MI) as a whole covers that same fixed equipment scope but also extends to rotating equipment, instrumentation and control systems, safety/relief devices, and electrical systems that fall under a facility's PSM program. In practice, FEMI is often used to describe the fixed-equipment-specific portion of an MI program, particularly in facilities that manage fixed and rotating assets under separate inspection disciplines or teams.