| Applicable Standards | Design and construction compliance | The plant should identify and apply relevant standards, such as ISO 22734 for hydrogen generators using water electrolysis, ISO 19880-1 for gaseous hydrogen refueling stations, and NFPA 2 where applicable to the project jurisdiction. | Standards matrix, design basis, compliance checklist, engineering calculations, and third-party review records. | 10% |
| Hydrogen Purity | Hydrogen quality at the delivery point | Purity requirements depend on the end use. Fuel-cell applications commonly require compliance with the applicable hydrogen fuel-quality specification, including limits for moisture, oxygen, nitrogen, hydrocarbons, sulfur compounds, carbon monoxide, and particulates. | Calibrated gas-analysis reports, sampling procedures, certificates of analysis, and acceptance-test results. | 15% |
| Production Capacity | Rated hydrogen output | The guaranteed output should be stated in a defined unit, such as kilograms per day or standard cubic metres per hour, together with inlet-water quality, operating pressure, temperature, and availability assumptions. | Factory acceptance test, performance curve, mass-flow-meter calibration, and site performance test under agreed operating conditions. | 10% |
| Energy Efficiency | Specific electricity consumption | Compare electricity consumption using a consistent boundary and basis, normally expressed as kWh per kilogram of hydrogen. The calculation should state whether auxiliaries, compression, cooling, purification, and drying are included. | Energy balance, calibrated electrical meters, operating data logs, and an independently witnessed performance test. | 10% |
| Pressure Integrity | Leak tightness and pressure resistance | Hydrogen-containing equipment, piping, valves, and storage vessels should be designed for the specified pressure, temperature, hydrogen service, and applicable pressure-equipment rules. | Hydrostatic or pneumatic test records where permitted, leak-test results, material certificates, weld inspection records, and pressure-vessel documentation. | 12% |
| Hydrogen Leak Detection | Detection coverage and alarm response | Detectors should be located according to the hazard assessment, ventilation pattern, equipment arrangement, and hydrogen accumulation risk. Alarm set points and actions must be defined in the cause-and-effect matrix. | Hazardous-area layout, detector calibration certificates, alarm tests, voting logic, shutdown tests, and maintenance records. | 12% |
| Ventilation and Hazardous Areas | Prevention of hydrogen accumulation and ignition | The design should address hydrogen dispersion, natural or mechanical ventilation, classified electrical equipment, ignition-source control, bonding, grounding, and safe equipment spacing. | Ventilation calculations, computational or physical dispersion assessment where needed, hazardous-area classification drawings, and grounding test reports. | 12% |
| Emergency Protection | Emergency shutdown and isolation | The plant should include clearly accessible emergency-stop devices, automatic isolation, pressure relief, safe vent routing, fire and gas alarm interfaces, and defined restart conditions. | Safety instrumented functions list, cause-and-effect diagrams, emergency-stop test records, relief-device certificates, and drills. | 12% |
| Automation and Monitoring | Continuous control of critical operating variables | Pressure, temperature, flow, liquid level, power, gas purity, and leak status should be monitored with suitable alarms, interlocks, data logging, and access control. | Instrument list, control narratives, alarm rationalization, calibration records, historian samples, and cybersecurity procedures. | 8% |
| Materials and Fabrication | Suitability for hydrogen service | Materials, seals, fittings, and welding procedures should be selected for hydrogen compatibility, pressure, temperature, corrosion risk, and potential hydrogen embrittlement. | Material traceability records, welding procedure qualifications, non-destructive examination reports, and supplier quality plans. | 6% |
| Water and Utility Quality | Feed-water treatment and utility reliability | Electrolysis systems require water quality suitable for the selected technology. Cooling, electrical power, instrument air, drainage, and backup systems should meet the plant design basis. | Water-quality analysis, treatment-system test results, utility load list, operating envelopes, and preventive-maintenance records. | 5% |
| Testing and Commissioning | FAT, SAT, and performance acceptance | Acceptance should cover mechanical completion, electrical checks, control-loop testing, leak testing, safety-function testing, stable operation, output, purity, and energy consumption. | Approved inspection and test plan, signed commissioning dossiers, punch-list closure, test certificates, and independent witness reports. | 5% |
| Operations and Maintenance | Maintainability and lifecycle support | The supplier should provide operating procedures, maintenance intervals, spare-parts lists, training, troubleshooting instructions, inspection plans, and clearly defined response times. | Operation and maintenance manuals, training records, recommended-spares list, maintenance schedule, and service-level agreement. | 3% |