EN Grooved Flange One-Piece (Flanged Adapter)
- Size range：DN50~DN600（2″~24″）
- Pressure class：Class 150~Class 900（PN10~PN100）
- Wall thickness range：SCH40~SCH160
- Applicable standards：ANSI/AWWA C606、ASME B16.5、EN 1092-1、ISO 7005
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Grooved flange one-piece fittings are innovative pipe connectors that enable quick installation without welding by combining traditional flanges with groove technology. Its one-piece design eliminates the risk of leakage between the flange and the pipe section, making it suitable for high-pressure scenarios such as fire fighting, petrochemical, water supply and drainage. The carbon steel version offers outstanding economy, while the stainless steel version can cope with corrosive media and, together with elastomer seals, can withstand system pressure fluctuations and temperature changes. The fittings significantly reduce installation time and are the preferred solution for modern piping projects.
EN Grooved Flange One-Piece (Flanged Adapter) Specification
Size and Pressure Comparison Chart
PN10 corresponds strictly to 1.0 MPa, and PN16 corresponds to 1.6 MPa.
There is a standard difference in pressure conversion between Class and PN, with AFSL focusing on the design pressure and ESL focusing on the nominal pressure.
| size (DN) | NPS | O.D. (mm) | Class 150 (MPa) | Class 300 (MPa) | PN10 (MPa) | PN16 (MPa) |
| 15 | ½” | 21.3 | 2 | 5 | 1 | 1.6 |
| 20 | ¾” | 26.7 | 2 | 5 | 1 | 1.6 |
| 25 | 1″ | 33.4 | 2 | 5 | 1 | 1.6 |
| 40 | 1½” | 48.3 | 2 | 5 | 1 | 1.6 |
| 50 | 2″ | 60.3 | 1.9 | 5 | 1 | 1.6 |
| 65 | 2½” | 73 | 1.7 | 4.6 | 0.9 | 1.5 |
| 80 | 3″ | 88.9 | 1.7 | 4.6 | 0.9 | 1.5 |
| 100 | 4″ | 114.3 | 1.7 | 4.6 | 0.9 | 1.5 |
| 150 | 6″ | 168.3 | 1.4 | 3.7 | 0.7 | 1.2 |
| 200 | 8″ | 219.1 | 1.4 | 3.7 | 0.7 | 1.2 |
| 250 | 10″ | 273 | 1.2 | 3.2 | 0.6 | 1 |
| 300 | 12″ | 323.9 | 1.2 | 3.2 | 0.6 | 1 |
| 450 | 18″ | 457.2 | – | 2.5 | 0.5 | 0.8 |
| 600 | 24″ | 609.6 | – | 2.5 | 0.5 | 0.8 |
Material Performance Comparison Table
| Material Type | Standard Code | Tensile Strength (MPa) | Yield Strength (MPa) | Corrosion Resistance (Annual Corrosion Rate) | Temperature Range |
| Carbon Steel (A105) | ASTM A105 | 485~655 | 250 | <0.1mm/year (Neutral) | -29°C~425°C |
| Stainless Steel (304) | ASTM A182 | 515~690 | 205 | <0.01mm/year (Acidic) | -196°C~800°C |
| Alloy Steel (F11) | ASTM A182 | 415~585 | 205 | <0.05mm/year (Oxidizing) | -29°C~650°C |
Wall Thickness and Weight Chart
Seamless and Carbon Steel
| DN | O.D.(mm) | SCH5S | SCH10 | SCH40 | SCH80 | SCH160 |
| 10 | 17.2 | 1.24/0.49 | 1.73/0.68 | 2.31/0.91 | 3.20/1.26 | 4.78/1.88 |
| 25 | 33.4 | 1.65/1.31 | 2.77/2.19 | 3.38/2.67 | 4.55/3.60 | 7.47/5.92 |
| 80 | 88.9 | 2.11/4.53 | 3.05/6.53 | 5.49/11.7 | 8.08/17.2 | 13.5/28.8 |
| 400 | 406.4 | 4.19/41.6 | 6.35/63.0 | 12.7/126 | 19.1/190 | 33.3/331 |
| 800 | 813 | 6.35/126 | 9.53/189 | 19.1/380 | 28.6/570 | 50.0/996 |
EN Grooved Glange One-Piece Face
RF Face (Raised Face)
- Structural Features: The sealing surface is a smooth plane, typically machined with 2-3 concentric grooves (serrations) to enhance sealing performance. The standardized height design ensures international compatibility.
- Gasket Selection:
- Suitable gaskets: Non-metallic flat gaskets (e.g., asbestos rubber), metal-jacketed gaskets, spiral-wound gaskets (graphite/PTFE filled).
- Pressure range: PN0.6~10MPa, preferred for medium-low pressure applications.
- Pros and Cons: Easy installation but requires precise alignment; gaskets are prone to extrusion, affecting sealing performance.
FF Face (Flat Face)
- Structural Features: The sealing surface is completely flat, with no raised or recessed areas, requiring full-face gaskets.
- Gasket Selection:
- Suitable gaskets: Non-metallic soft gaskets (e.g., PTFE), rubber gaskets, suitable for low-pressure (PN≤1.6MPa) and corrosive media.
- Special requirements: Must be paired with full-face flanges to avoid uneven gasket compression.
- Pros and Cons: Low cost but weaker sealing performance, limited to low-temperature and low-pressure scenarios.