Protecting People, Assets, and the Environment

Safety Instrumented Systems (SIS) by ATG are engineered to provide a highly responsive and reliable functional safety layer between the process control system and the plant’s relief and venting mechanisms. Each SIS is designed to detect abnormal conditions and bring the process to a safe state —safeguarding personnel, equipment, and the environment.

Design Philosophy & Compliance

ATG’s SIS design and implementation strictly follow international standards and regulatory frameworks, including:

• IEC 61508 – Functional Safety of Electrical/Electronic/Programmable Systems
• IEC 61511 / ISA 84 – Functional Safety for the Process Industry Sector
• Other applicable regulatory and corporate standards

The complete lifecycle approach includes:

• HAZOP (Hazard and Operability Study)
• LOPA (Layer of Protection Analysis)
• Functional Safety Assessment (FSA)
• Definition of Independent Protection Layers (IPL)
• SIL determination and verification
• System architecture and design compliance
• Cause & Effect matrix development
• Programming, testing, and validation
• On-site commissioning and shutdown narrative documentation

ATG ensures that every system is verified against the intended Safety Integrity Level (SIL) , minimizing spurious trips , reducing downtime , and improving plant safety and availability.

System Capabilities and Applications

ATG delivers complete SIS solutions, including:

• Emergency Shutdown Systems (ESD)
• Fire and Gas Detection & Suppression Systems (FGS)
• Burner Management Systems (BMS)
• High Integrity Pressure Protection Systems (HIPPS)

These systems are designed to meet critical safety demands, offering advanced features such as:

• First-out annunciation for root cause identification
• Millisecond-resolution Sequence of Events (SOE) recording
• Redundant architecture for high availability and reliability

Fire & Gas Systems (FGS) with Suppression Control

ATG’s SIL-rated Fire and Gas Systems extend beyond detection and alarming to include fire suppression and extinguishing control . Designs comply with NFPA or equivalent standards and may include:

• Smoke, flame, heat, toxic, and flammable gas detectors
• Deluge valves, CO₂, FM-200, NOVEC, or equivalent suppression systems
• Integrated alarm and control panels with real-time monitoring

Expertise Across Leading Safety Platforms

ATG engineers possess hands-on experience across major SIS and DCS platforms including ABB, Emerson, Honeywell, Rockwell, Siemens, and Yokogawa. This enables seamless integration, programming, and support across multi-vendor environments.

Assurance through Engineering Excellence

From conceptual studies to commissioning and validation, ATG’s SIS solutions are engineered to achieve regulatory compliance, minimize operational risk, and ensure plant-wide safety integrity . Each system delivers reliability, traceability, and peace of mind —supporting safe and sustainable operations across power, oil & gas, petrochemical, and chemical industries.