Refrigeration System Compliance Requirements (Ammonia & Chiller Plants)

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We perform detailed on site compliance adits and manage the full process with approved inspection authorities (AIA) from gap identification to certified

testing, inspections and maintainence

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1. Pressure Equipment Legal Compliance(Driven by OHS Act – Pressure

Equipment Regulations (PER) + SANS)Applies to:

• Pressure vessels (receivers, surge drums, oil pots, intercoolers)

• Piping systems

• Heat exchangers

• Safety relief devices

• Equipment must be registered and classified (often Cat I–III under SANS 347)

• Data plates

• Design pressure & temperature clearly marked AIA (Approved Inspection

Authority) involvement is mandatory for: Inspections, Certifications, Pressure

tests

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2. Pressure Testing (Pneumatic)Frequency:

• Typically every 2 and 4 years (or as per risk-based inspection plan)

• Conducted under controlled conditions

• Witnessed and signed off by AIA Test pressure:

• Usually 1.25 – 1.5 × design pressure Must use:

• Calibrated test gauges (WIKA or equivalent)Full documentation, Test

certificates

• Method statements

• Risk assessments⚠️Critical: Pneumatic testing = high risk → requires strict

control

and justification.

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3. Non-Destructive Testing (NDT)Typical Frequency:

• Every 2 years 

• UT (Ultrasonic Thickness Testing) → corrosion monitoring

• Dye Penetrant Testing (DPT) → surface cracks

• Mag Particle Testing (MPI) (where applicable)

• Eddy current (for tubes)

• Must be done by certified NDT technicians

• Company must be approved/registered Reports must include:

• Thickness trends

• Remaining life assessment

• Defect reporting

• Safety Relief Valves (SRVs)Legal Requirements: Mandatory on all pressure

vessels,

 Be correctly sized for system capacity, Discharge to safe, Tested & calibrated

annually,

 Seal intact, Set pressure tag, Certification record⚠️ Real-world critical, Dual

safety

valves often required for continuous operation

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4. Pressure Gauges Requirements: 

• All Vessels

• Piping

• Designed to SANS / relevant codes Clearly identified:

• Flow direction   

 

5.Ammonia System Compliance Monitoring & Safety:

• Ammonia detectors (where required)

• Ventilation systems

• Emergency shutdown procedures

• Regular ammonia sampling• Oil contamination

• Moisture

• Non-condensables Documentation:

• Handling procedures

• Emergency response plans

• Training records Documentation & Certification

• Pressure test certificates

• NDT reports

• Safety valve certificates

• Calibration records (gauges)

• Equipment registers

• P&IDs (updated)

• Maintenance records

• Risk assessments & method statements

 

9. Competency Requirements Personnel must be:

• Qualified refrigeration artisans (SARACCA aligned)

• Trained in ammonia handling

• Authorized to work on pressure equipment

 

10. Routine Inspection & Maintenance ComplianceAnnual (minimum):

• Filters, dryers, oil checks

• Valve inspections

• Safety device checks2-Yearly:

• NDT inspections

• Internal condition checks

• Pressure testing

• Major statutory inspections: most plants fail compliance not because they don’t do

work — but because, documentation is incomplete, Safety valves are overdue,

NDT trends aren’t tracked, Gauges aren’t calibrated ,If you position your company

around “compliance + documentation + audit readiness” — you’ll stand out

immediately!