SIS Engineering Services for Process Risk Reduction
When operating conditions exceed safe limits, the SIS must respond exactly as intended. ZAP brings process safety and controls expertise to safety instrumented systems (SIS) for new facilities, operating plants, modernization projects, and legacy system upgrades.
Our engineers work directly with client teams to align safety requirements, field devices, and logic execution with facility operations. ZAP’s SIS engineering supports compliance, audit readiness, and predictable system response across operating states while keeping designs practical and serviceable. From early process hazard identification and mitigation through ongoing support, we help sustain reliable SIS performance as plant conditions and operating requirements evolve.
SIS Capabilities:
- Hazard assessment and safety requirements definition
- Safety Integrity Level (SIL) determination and verification
- Safety Requirements Specification (SRS) development
- SIS design and implementation
- Integration with existing DCS and control environments
- Legacy safety system and hardware modernization
- Engineering for evolving PSM and SIL requirements
- Auditable documentation for regulatory and insurer review
- Proof-testing and maintenance strategies
- Factory, commissioning, and site acceptance testing
- SIS lifecycle management and risk reviews
- Troubleshooting, training, and system modifications
