Safety Instrumented Systems

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Maximize safety, integrity, and reliability across the system lifecycle

Modern safety instrumented systems (SISs) are complex and require special attention for safe operation and shutdown. Taking a holistic view of your operation offers comprehensive insight that can help you improve safety, operational integrity, and uptime at every stage of your project—from implementation to operations and maintenance.

Audubon’s integrated approach to safety instrumented systems provides crucial information to increase asset protection and productivity while maintaining the highest levels of HSE. From process hazard analysis (PHA) and a layer of protection analysis (LOPA) to safety system design, verification, and management, our SIS solutions ensure safety and maximize your asset’s performance.

Following the latest standards for functional safety outlined by ANSI/ISA-61511, we help you maintain compliance throughout the productive life of the safety system. Collaborating together, we will customize a sustainable, safety solution that fits your organizational capacity and meets your business objectives.

Safety instrumented systems capabilities

  • Functional safety management plans (FSMP)
  • Functional safety assessments (FSA)
  • Safety requirements specification (SRS)
  • Safety integrity level (SIL) selection
  • Probability of failure on demand (PFD) & spurious trip rate (STR) calculations
  • Proof test procedures
  • ANSI/ISA-61511 total safety system lifecycle management
  • High-integrity pressure protection system (HIPPS)

Assure compliance, safety, and efficiency throughout the entire system lifecycle.

Project experience

PLC Upgrade and On-line Cutover | Audubon Companies


PLC Upgrade and On-Line Cutover


Cypress & Spruce Compressor Stations | Audubon Companies | Integrated EPC Services


Onsite Process Control Domain Support


Cryogenic Facility Expansions | Audubon Companies


Cryogenic Facility Expansions

Marcellus Shale

Chemical Plant Network Security Solutions Project Profile | Audubon


Chemical Plant Network Security Solutions

Deer Park, TX