Mechanical Integrity

A core component of the Process Safety Management standard required by OSHA 1910 mandates that industrial plants develop plans to prevent or minimize major releases, spills, fires, and explosions. The requirements apply to six types of process equipment:

  • pressure vessels and storage tanks
  • piping systems (including valves and other components)
  • relief and vent systems and devices
  • emergency shut-down systems
  • controls (monitoring devices and sensors, alarms and interlocks)
  • pumps

According to OSHA, the necessary elements of a good mechanical integrity (MI) program are:

  • written procedures implemented to maintain the integrity of process equipment
  • training of employees and contractors involved in maintaining the equipment
  • periodic inspection and testing following recognized and generally accepted good engineering practices with documentation that inspections have been done
  • correction of equipment deficiencies in a prompt and timely manner
  • a quality assurance program to ensure equipment for new plants is suitable for use in process, properly installed, and that all maintenance materials, spare parts, and equipment are suitable for intended use