EN 14341 is the European standard specifying the design, manufacturing, material, testing and inspection requirements...
EN 13774 is the European standard specifying performance requirements for metallic isolating valves used in gas distribution systems with a maximum operating pressure of 16 bar.
The standard applies to valves operating with fuel gases of the first, second and third family in accordance with EN 437 and provides additional requirements to relevant valve product standards.
What is EN 13774?
EN 13774 establishes performance, testing, marking and operational requirements for valves used in gas distribution networks.
Where conflicts exist between EN 13774 and other valve standards, EN 13774 takes precedence for gas distribution applications.
Scope of Application
- Natural Gas Distribution Networks
- LPG Distribution Systems
- Underground Gas Pipelines
- Gas Pressure Regulating Stations
- Industrial Fuel Gas Systems
Valve Types Covered
- Ball Valves
- Plug Valves
- Gate Valves
- Globe Valves
- Butterfly Valves
Excluded Valve Types
- Valves for Domestic Installations
- Safety Pressure Relief Valves
- Wellhead Valves
Temperature Classes
| Class | Temperature Range |
|---|---|
| T1 | -10°C to +60°C |
| T2 | -20°C to +60°C |
| Special Design | Specified by Purchaser |
Maximum Operating Pressure
| Parameter | Value |
|---|---|
| Maximum Operating Pressure | ≤ 16 bar |
| Service Medium | Fuel Gases according to EN 437 |
Design Requirements
- Pressure integrity
- Reliable gas tightness
- Resistance to external loading
- Leakage prevention
- Suitability for gas distribution service
- Product marking requirements
Inspection and Testing
- Shell Strength Test
- Seat Leakage Test
- Operational Test
- Endurance Verification
- Visual Inspection
- Marking Verification
Typical Applications
Urban Gas Distribution Networks
Isolation valves for underground and above-ground gas pipelines.
Gas Pressure Regulating Stations
Safe isolation of regulating and metering equipment.
Industrial Natural Gas Systems
Main gas supply lines and process utility networks.
Related Standards
| Standard | Scope |
|---|---|
| EN 13774 | Gas Distribution Valves |
| EN 12266 | Valve Testing |
| EN 12516 | Valve Design Strength |
| EN 10204 | Inspection Documents |
| PED 2014/68/EU | Pressure Equipment |
Conclusion
EN 13774 is the principal European standard for isolating valves used in gas distribution systems up to 16 bar. Through defined performance, testing and reliability requirements, it supports the safe operation of natural gas distribution infrastructure.