Dynamic testing: validating systems under real conditions

Dynamic testing is the final validation step before operational startup. Unlike loop testing which verifies signal paths, dynamic testing validates that complete systems function correctly under real or simulated operating conditions — with actual process media, pressure, temperature, and flow.

FARAMED performs dynamic testing on rotating equipment, process control systems, safety instrumented systems, and complete process trains. Our approach detects integration issues that only emerge when multiple systems interact under load.

What dynamic testing covers

• Rotating equipment — Compressors, turbines, pumps, motors: vibration analysis, bearing temperature monitoring, performance curves validation, trip logic verification
• Process control loops — PID tuning verification, control valve response under actual process conditions, cascade and ratio control validation
• Safety instrumented systems — SIS cause-and-effect matrix validation, ESD sequence testing, fire and gas detection response time, partial stroke testing of shutdown valves
• Process trains — End-to-end functional testing of complete production trains from inlet to outlet
• Utility systems — Instrument air, cooling water, hydraulic power units, electrical distribution under load

Our methodology

Phase 1: Pre-dynamic checks

Before energizing equipment, we verify that all prerequisites are met: loop tests completed and accepted, mechanical completion certificates signed, alignment checks validated, lubricant levels confirmed, and all safety interlocks tested.

Phase 2: No-load testing

Equipment is started without process media. We verify rotation direction, vibration baselines, control system response, and alarm setpoints. This phase identifies wiring errors, configuration issues, and mechanical defects without process risk.

Phase 3: Load testing

Process media is introduced progressively. We monitor system behavior at 25%, 50%, 75%, and 100% of design capacity. Each performance point is documented against design specifications. Control loops are tuned for optimal response.

Phase 4: Trip and interlock verification

All safety trips and interlocks are tested under dynamic conditions. ESD sequences are executed, cause-and-effect matrices are validated end-to-end, and fire and gas systems are proven to respond within design time limits.

Equipment and capabilities

• Portable vibration analyzers and accelerometers
• Infrared thermography cameras for bearing and electrical connection monitoring
• Portable flow measurement (ultrasonic clamp-on)
• Data acquisition systems for simultaneous multi-parameter recording
• Calibrated pressure and temperature test instruments
• Control system interface for real-time monitoring during tests

Industries and applications

• Oil and gas — FPSO topsides, gas compression trains, produced water treatment
• LNG — Cryogenic process trains, boil-off gas compressors, loading arms
• Refining — Distillation columns, reactor systems, product blending
• Power generation — Gas turbine packages, steam turbine generators, HRSG systems
• Petrochemicals — Ethylene crackers, polymerization reactors, utility systems

Why early dynamic testing matters

Finding an integration issue during dynamic testing costs 5 to 10 times less than discovering it during startup. With construction scaffolding still in place and commissioning crews on site, corrections can be made immediately. During operational startup, the same fix requires shutdown, scaffolding re-erection, work permits, and schedule impact measured in days or weeks.

Our approach integrates dynamic testing into the commissioning schedule as early as possible, overlapping with construction completion rather than waiting for full mechanical completion of all systems.

Compliance

• IEC 62382 — Electrical and instrumentation loop check and system integration
• IEC 61511 — Safety instrumented systems functional safety validation
• API 686 — Machinery installation and commissioning
• API 614/617/618 — Compressor and turbine commissioning requirements

Ready to plan your dynamic testing program?

Contact our engineering team to discuss your equipment scope, process conditions, and commissioning schedule. We will develop a tailored dynamic testing protocol aligned with your project milestones.