Product Description
EN 1092-1 Steel Forged Pipe Flanges Technical Data
1. Flange Type Designation Matrix
| EN Type Code | Flange Description | Common Name / Design Type | Attachment Method | Face Compatibility | Application / Mechanical Characteristics |
| Type 1 | Plate flange for welding | Flat Slip-On / Plate Flange | Fillet welded inside and outside | Form A, Form B | Low-pressure systems, non-critical process lines, water utility |
| Type 2 | Loose plate flange with weld-on collar / lap | Loose Flange with Weld-on Collar | Collar butt-welded to pipe; flange rotates | Form A, Form B (on collar) | Lines requiring frequent alignment or exotic alloy savings |
| Type 5 | Blind flange | Blank / Blind Flange | Bolted directly to opposing flange | Form A, Form B, Form C, D, E, F | Line blanking, pressure vessel nozzle closure, end caps |
| Type 11 | Weld neck flange | Hubbed Welding Neck Flange | Circumferential butt weld to pipe | Form A, Form B, Form C, D, E, F | High pressure, cyclic loading, extreme temperature lines |
| Type 12 | Hubbed slip-on flange | Hubbed Slip-On Flange | Double fillet weld (inside and outside) | Form A, Form B | Intermediate pressure systems, easier alignment than Type 11 |
| Type 13 | Hubbed threaded flange | Screwed / Threaded Flange | Parallel or tapered thread connec |
Precision-Engineered EN FlangesEach EN standard flange is produced using advanced drop forging and CNC machining. Strict tolerance standards and polished finishes ensure a leak-tight and durable connection for every project. Suitable for welding or bolting, these flanges offer reliable performance in extreme temperatures and high-pressure environments.
Versatile Face and Hole ConfigurationsChoose from Raised Face (RF), Flat Face (FF), or Ring Type Joint (RTJ) face types, tailored to your piping system requirements. All flanges feature pre-drilled bolt holes as per EN specifications, allowing for seamless and quick installation across a range of industrial applications.
Custom Materials, Sizes, and CoatingsFlanges are available in carbon steel, stainless steel, and alloy steel with grades like S235JR, P245GH, and 1.4541. Custom size options (DN10-DN2000) and coatings-including anti-rust oil-ensure suitability for specific project needs and extended service life, even in the harshest environments.
FAQ's of EN Standard Type 1,2,5,11,12,13 Steel Forged Pipe Flanges:
Q: How are EN standard forged pipe flanges manufactured?
A: These pipe flanges are produced through the drop forging process followed by precise machining to meet EN standards. This method enhances the strength, uniformity, and dimensional accuracy of the flanges, ensuring superior leak-proof performance and long-term durability.
Q: What face types and connection options are available for these flanges?
A: EN standard flanges come with Raised Face (RF), Flat Face (FF), or Ring Type Joint (RTJ) options. Connection methods include both welded and bolted styles, providing versatility for various industrial pipelines and systems.
Q: When should I use a flange with a specific face type like RF, FF, or RTJ?
A: The choice depends on your application: Raised Face (RF) is common for handling higher pressures, Flat Face (FF) is ideal for low-pressure connections, and Ring Type Joint (RTJ) offers excellent sealing for high-pressure or critical environments. Always match face type to your pressure and sealing needs.
Q: Where are these flanges typically used?
A: These flanges are ideal for applications in piping systems across petrochemical, oil & gas, water supply, industrial processing, and power plants. Their robust nature suits both routine and critical pipeline projects.
Q: What is the temperature and pressure resistance of these flanges?
A: Depending on the material and flange type, they can withstand temperatures up to 600C or higher and are rated for pressures from PN6 to PN40 as per EN standards, ensuring safe and reliable performance in demanding conditions.
Q: How does the anti-rust coating benefit the usage of these flanges?
A: The anti-rust oil coating protects the flange surfaces from corrosion during storage, shipping, and initial usage phases. Custom coatings can also be applied, extending service life and reducing maintenance needs in harsh environments.