EN 1092-1 Gate Valves
What EN 1092-1 requires for gate valves — applicability, key and testing requirements, the alternative standards, and compliant supply with full certification.
What does EN 1092-1 require for gate valves?
EN 1092-1 (Flanges and Their Joints - Circular Flanges for Pipes, Valves, Fittings and Accessories, PN Designated - Part 1: Steel Flanges, European Committee for Standardization (CEN)) sets the design, material and testing requirements for gate valves in its scope. EN 1092-1 is the European standard for steel flanges, defining the PN-designated (Pressure Nominal) pressure ratings, dimensions, tolerances, materials, and marking requirements for circular flanges used on pipes, valves, fittings, and accessories. It is the European counterpart to ASME B16.5 and is mandatory for flanged equipment supplied into EU markets under the Pressure Equipment Directive (PED 2014/68/EU). EN 1092-1 flanges are specified on European refinery, chemical plant, offshore, and building services projects and are essential for CE-marked valve packages destined for EU installation.
Applicable Pressure Classes
Key Requirements
- PN (Pressure Nominal) designations from PN 6 through PN 400 - each with defined P-T rating by material group
- Flange type designations: Type 01 (plate, flat face), Type 02 (loose plate), Type 05 (blind), Type 11 (weld neck), Type 12 (hubbed slip-on), Type 13 (hubbed threaded), Type 21 (integral), Type 34 (welding boss)
- Facing types: flat face (FF), raised face (RF), tongue and groove (T&G), male/female (M/F), ring joint (RJ)
- Bolting and bolt circle dimensions per PN class and DN size
- Material groups per EN 13480 or EN 13445 aligned with European pressure vessel codes
- CE marking required for flanges used under PED 2014/68/EU Annex I
- Surface finish Ra ≤ 6.3 µm for raised face seating surface
Testing Requirements
- Dimensional inspection of flange face, bolt circle, and outer diameter per EN 1092-1 tables
- Shell hydrostatic test per manufacturer standard or PED requirements
- Material verification: PMI or 3.1 MTR for alloy and stainless steel flanges
Alternative Standards for Gate Valves
Other standards that also govern gate valves — useful for spec cross-acceptance.
Connected Engineering
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