Valve Standard Reference
EN 12266
EuropeanIndustrial Valves - Testing of Metallic Valves (Parts 1 and 2)
EN 12266 is the European standard for pressure testing of metallic industrial valves - the EU equivalent of API 598 and ISO 5208, commonly specified in European refinery and petrochemical projects.
What is EN 12266?
EN 12266 (Industrial Valves - Testing of Metallic Valves (Parts 1 and 2)) is an industrial valve standard issued by European Committee for Standardization (CEN). EN 12266-1 covers pressure tests for gate, globe, check, ball, butterfly, and plug valves.
- Issuing Body:
- European Committee for Standardization (CEN)
- Category:
- testing
Overview - EN 12266
EN 12266 is the European standard for pressure testing of metallic industrial valves - the EU equivalent of API 598 and ISO 5208, commonly specified in European refinery and petrochemical projects.
Scope
EN 12266-1 covers pressure tests for gate, globe, check, ball, butterfly, and plug valves. EN 12266-2 covers supplementary requirements for special-purpose tests. Defines test procedures, test pressures, acceptance criteria (Rates A through F), and documentation requirements for shell and seat tests.
Vajra Industrial Solutions manufactures and supplies valves engineered to comply with EN 12266, each delivered with EN 12266 Factory Acceptance Test certificate and Declaration of Conformity (DoC) for PED compliance as standard.
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Applicable Valve Types
Gate Valves
Globe Valves
Ball Valves
Butterfly Valves
Check Valves
Applicable Pressure Classes
Key Requirements - EN 12266
Shell test (Part 1, Clause 5.1): 1.5× PS (maximum allowable pressure) at 20°C; acceptance criterion: Rate A (no visible leakage)
Seat test (Part 1, Clause 5.2): 1.1× PS; acceptance criterion: Rate A (zero) for tight-shutoff or Rate D for standard service
Rate definitions: Rate A = no visible leakage; Rate B/C/D = measured leakage limits per pipe size and pressure class
Backseat test (Part 1, Clause 5.3): for valves with packing isolation feature; 1.1× PS behind the backseat
Part 2 supplementary tests: high-temperature seat test, low-temperature seat test, fugitive emission test
EN 12266 is mandatory for PED 2014/68/EU compliance in Europe - documented FAT required
Testing Requirements - EN 12266
EN 12266-1 shell and seat test with documented FAT report
CE marking attestation if PED-relevant
Documentation Required for EN 12266 Compliance
EN 12266 Factory Acceptance Test certificate
Declaration of Conformity (DoC) for PED compliance
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