Based on the search results, the choice between an EAC Certificate (CoC) or EAC Declaration (DoC) under TR CU 032/2013 depends on risk classification, product type, and operational parameters. Here’s a structured comparison:
⚖️ 1. Core Selection Criteria
Factor    EAC Certificate (CoC)    EAC Declaration (DoC)
Risk Category    Mandatory for Class 1-2 high-risk equipment:
- Pressure vessels >0.001 m³ & >0.05 MPa 
- Boilers (>110°C or >0.05 MPa steam) 
- Gas/high-temperature pipelines (DN >25 mm)     For Class 3-4 lower-risk equipment:
- Liquid-medium pipelines (DN ≤25 mm) 
- Valves (DN ≤32 mm) 
Applicant Requirements    Open to foreign manufacturers; issued by EAEU-accredited bodies     Only EAEU-registered entities (local importer/distributor) 
Validity Period    Up to 5 years (with annual audits for batch production)     Up to 5 years (no audits, tied to batches/contracts) 
⚙️ 2. Product-Specific Requirements
Requiring EAC Certificate (CoC):
Pressure vessels: Working pressure >0.05 MPa and volume >0.001 m³ .
Boilers: Steam pressure >0.05 MPa or hot water >110°C .
Safety devices: Valves, pressure sensors for hazardous media .
Gas pipelines: Nominal diameter >25 mm .
Requiring EAC Declaration (DoC):
Low-pressure liquid pipelines: DN ≤25 mm .
Non-critical valves: DN ≤32 mm for non-hazardous media .
Exclusions: Medical devices, nuclear equipment, aerosol dispensers .
📋 3. Certification Procedures
For EAC Certificate (CoC):
Steps:
1.Submit technical documents (safety case in Russian, design drawings, test reports) .
2.Laboratory testing (e.g., 1.5x pressure hydrostatic test, NDT) .
3.Factory audit (mandatory for Schemes 1C/7C) covering welding processes, QMS .
4.Annual surveillance audits for batch production .
Schemes: 1C (batch), 3C/4C (single shipment) .
For EAC Declaration (DoC):
Steps:
1.Compile technical file (self-prepared test reports, technical passport, manuals) .
2.Optional third-party lab testing for disputed cases .
3.No factory audit (except Scheme 6D with ISO 9001) .
4.Register declaration in EAEU database via accredited body .
Schemes: 1D/2D (self-testing), 3D/4D (lab testing) .
⚠️ 4. Critical Compliance Requirements
Design & Manufacturing:
Safety justification in Russian, GOST-compliant strength calculations .
Welding must follow GOST R ISO 3834 with 100% NDT .
Documentation:
Technical passport, user manuals in Russian/EAEU languages .
Material certificates (e.g., GOST standards) .
EAC Marking:
Mandatory on products/packaging (min. 5 mm height) .
⏱️ 5. Timeline & Cost Considerations
Aspect    EAC Certificate (CoC)    EAC Declaration (DoC)
Processing Time    2–5 months (due to audits/tests)    1–3 weeks (document review) 
Cost Drivers    Lab tests, factory audits, annual inspections    Minimal fees (self-declaration) 
💎 Summary
Opt for EAC Certificate if:
Handling high-risk pressure equipment (e.g., gas boilers, large vessels).