Ensuring Safer Operations with ISA84/IEC61511 Compliant Safety Instrumented Systems (SIS)
Functional Safety Experts and Engineers with decades of experience deliver the true power of a lifecycle approach to functional safety.
Years of Experience
30
+
Functional Safety Engineers & Experts
40
+
Safe-Hours Worked Milestone
3.6mil
+
Industrial processes present hazardous risks that can threaten the safety of employees and the surrounding environment. These exposures also present unwanted risk to processing assets and equipment that, if not properly mitigated, can result in costly or even catastrophic accidents within operating facilities. That’s why implementing Safety Instrumented Systems (SIS) is a vital safeguard for critical operations.
Mangan’s focus for decades has been to work with our clients to design and implement ISA84 compliant Safety Instrumented Systems (SIS) that adequately mitigate these unwanted risks to an acceptable level. This includes participating in the HAZOP/LOPA process or review of Prescriptive standards to properly allocate, design, implement, and maintain Safety Instrumented Functions (SIF) to return the process to a “Safe State” when a hazardous condition is detected. We also support Compliance Consulting for Refineries to ensure all regulatory and industry standards are met.
Through online and offline proof testing and LOPA revalidation processes, Mangan works to ensure the reliability of these systems is maintained per design—an essential aspect of delivering reliable Safety Instrumented Systems (SIS) for Oil & Gas facilities.
Our Services
Find the right support for your safety lifecycle
Functional Safety Engineering
Need help with hazard and risk assessment, IPLs, safety requirements, or a functional safety assessment? Explore Functional Safety Engineering →
SIS Project Execution
Planning a new SIS or upgrading an existing one? Get support from requirements and design through integration, testing, and commissioning. Explore SIS Project Execution →
Field Services
Need on-site help with SIS startup, commissioning, proof testing, or turnaround work? See how our field team supports systems in operation. Explore Field Services →
Knowledge Base
What Is the Value of a Safety Lifecycle Perspective?
A Safety Lifecycle perspective provides a comprehensive approach to identifying and adequately mitigating risk to an acceptable level throughout the process—key to any successful Safety Instrumented Systems strategy.
01
Hazard & Risk Assessment
02
Design & Implementation
03
Operation & Maintenance
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Mangan’s mission is to partner with clients in this transformational journey mastering the challenges ahead and tailoring safe and reliable solutions for a sustainable industry.
Testimonials
What our clients say about us?
Impressive!
“The alternative solutions to meet the project objectives were difficult and challenging. However with Mangan’s expertise, experience, responsible attitude and commitment to meet schedule and budget we were able to achieve our goals.”
West Coast Refinery
PROJECT ENGINEERING MANAGER
Our Clients
Some of our clients & companies we work with


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Latest News & Articles
Stay updated with the latest news and articles on functional safety, SIS project execution, and field services, providing insights and developments in safety systems and industry practices.
How Petrochemical Plants Reduce SIS Project Risk Safely
SIS Modernization Planning for Midstream Facilities Success