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Safety Instrument

Injury to employees, damage to plant facilities and equipment, and environmental discharges are incidents that you want to prevent. SIGMA understands your priorities and has extensive experience in all aspects of safety systems including safety instrumented systems (SIS), emergency shutdown systems (ESD), Process shutdown systems (PSD), and safety interlock systems. SIGMA approach to safety systems has evolved with the development of industry standards including IEC 61508 and IEC 61511 (ANSI/ISA S84). SIGMA follows the S84 Safety Life Cycle to develop Safety Requirement Specifications (SRS) and perform conceptual and detailed design prior to installing, commissioning and testing SIS systems. SIGMA can also assist customers by participating in Process Hazard Analysis (PHA) and Pre-Startup Safety Review (PSSR) safety/risk assessments.

SIGMA has developed safety systems for chemical process shutdowns, fired heaters, burner management systems, fire and gas detection, black liquor boiler shutdowns and compressor shutdowns. As an independent systems integrator, SIGMA is able to work with customers to evaluate competing SIS architectures and technologies. Whether your system involves multiple PLCs or a single DCS, we know the critical design elements and right approach for both hardware and software.

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