Glossary

Key terms used across Enthovion product and guide content. Definitions are provided for general educational context and may vary by jurisdiction and organization.

SDS (Safety Data Sheet): A structured document describing chemical hazards, safe handling, storage, emergency measures, and regulatory information for a substance or mixture.
GHS (Globally Harmonized System): An international framework for classifying chemical hazards and communicating them through labels and SDS documents. Adoption details vary by jurisdiction.
PSM (Process Safety Management): A management system approach for controlling process-related hazards. Requirements and scope depend on jurisdiction and facility type.
PSI (Process Safety Information): Technical and safety information about process chemistry, equipment, safeguards, and related documentation needed to understand and control process hazards.
PTW (Permit-to-Work): A formal authorization system for hazardous work that defines scope, controls, isolations, authorizations, and handovers before work begins.
MOC (Management of Change): A structured process for evaluating and approving changes to process equipment, chemistry, procedures, or organization that may affect safety.
PSSR (Pre-Startup Safety Review): A review conducted before startup or restart to confirm that process changes meet safety requirements and that safeguards are in place.
HAZOP (Hazard and Operability Study): A structured team-based technique for identifying process hazards and operability problems using guide words and systematic deviation analysis.
PHA (Process Hazard Analysis): A general term for systematic methods used to identify and evaluate process hazards. HAZOP and other methods may be used depending on context.
LOPA (Layer of Protection Analysis): A semi-quantitative method for evaluating risk by identifying initiating events, independent protection layers, and consequences.
SIL (Safety Integrity Level): A measure of performance required for a safety instrumented function within a safety instrumented system.
SIMOPS (Simultaneous Operations): Situations where multiple activities occur in the same area or on interconnected systems, requiring coordination to manage combined risk.
Safe Operating Limits: Defined limits for process variables beyond which operation may be unsafe without additional review or safeguards.
Mechanical Integrity: Programs and practices to ensure equipment is designed, installed, tested, and maintained to perform safely in service.
Chemical Compatibility: Assessment of whether chemicals can be safely stored, mixed, or handled together without unacceptable reactions or hazard escalation.
Hazard Classification: The process of assigning hazard classes and categories to a substance or mixture based on data, rules, and jurisdiction-specific adoption.