The DIN EN 1092-1 Type 11 (Weld Neck) flange is the European standard for butt-welded piping components. Utilizing P245GH or P250GH—heat-resistant carbon steels—these flanges are engineered for elevated temperature service in power plants and pressure vessels. The tapered hub provides a transition from flange thickness to pipe wall, reducing stress at the base. They ensure high integrity in systems ranging from PN 2.5 to PN 400, offering superior durability over slip-on alternatives.
Technical Attributes: EN 1092-1 P245GH/P250GH Weld Neck Flange
Standard,EN 1092-1 (European Standard)
Flange Type,Type 11 (Weld Neck)
Material (P245GH),EN 10222-2 / 1.0460 (Fine grain)
Material (P250GH),EN 10222-2 / 1.0460 (Heat resistant)
Nominal Size,DN 10 to DN 4000
Pressure Rating,PN 2.5 to PN 400
Facing Type,"Type B1 (Raised Face, 3.2–12.5 µm)"
Alternative Facing,"Type B2 (Fine finish), C, D, E, F"
Manufacturing,"Forged, Heat Treated"
Weld Connection,Butt-weld (Tapered Hub)
Impact Test,Required for low-temp certification
Yield Strength,Min. 245 MPa (P245GH) at Room Temp
Tensile Strength,410–530 MPa (P245GH)
Service Temp,Up to 450°C (depending on pressure)
Hardness (HB),114 to 159 (Standard range)
Traceability,EN 10204 3.1 or 3.2 Certificate
Dimensional Specs,Table 8 to Table 14 of EN 1092-1
Key Industries,"Steam, Boiler, & Power Generation"
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