ANSI/ISA-84.91.01:2021

1 Scope
2 Normative references
3 Definitions
4 Procedure
5 Informative references and related documents

ANSI/ISA-84.91.01-2021, Identification and Mechanical Integrity of Process Safety Controls, Alarms and Interlocks in the Process Industry Sector, establishes procedures for identifying and ensuring the mechanical integrity of process safety controls, alarms and interlocks in the process industry sector. It focuses on instrumentation classified as process safety safeguards, outlining requirements for proper installation, periodic inspections, testing, maintenance and documentation to maintain safe operation and manage process safety risks. ANSI/ISA-84.91.01 also references related standards like ANSI/ISA-61511 for safety instrumented systems (SIS) and ANSI/ISA-18.2 for alarm management and emphasizes good engineering practices throughout its application. Note: Non-process safety safeguards and nuclear industry-specific codes are excluded from this standard.