On 19th ,July, 2024. Mr Sarkis from Sakr Power Systems S.A.L. in Lebanon sent us an inquiry for EN1092-1 Type 11 weld neck flange.
FL.W/N EN 1092-1/ 11/ B1 PN16/FL,DN25,RF, CARBONSTEEL, 90 PIECES
At 15th, August. He informed us the order has been awarded successfully by the end users and required us to start producing immediately.
| Item | QTY | ND | Pressure Class | DESCRIPTION | Port 1 Connection Type | Port 2 Connection Type | Material | Quantity | Unit |
| Code | |||||||||
| 200359601182 | 90 | 25 | 16 | FL.W/N EN 1092-1/ 11/ B1 PN16/FL | BV | FL, RF | Carbon Steel | 90 | EA |
EN 1092-1 Weld Neck Flange Specification
The EN 1092-1 Type 11 Weld Neck Flange is a versatile and robust flange type that is used in a wide range of industrial applications where high pressure, high temperature, and strong mechanical integrity are required. The unique design of the weld neck flange, with its tapered neck that is welded to the pipe, provides a strong connection that can handle substantial stresses without compromising the integrity of the system.
| Standard | EN 1092-1 European Standard |
| Manufacturing Process | Hot Forging / Steel Casting / Hot Rolled / Plate Machining |
| Outer Diameter | DN 15 to DN 4000 |
| Pressure Class | PN 2.5, PN 6, PN 8, PN 10, PN 16, PN 25, PN 40, PN 63, PN 100 etc |
| Flanges Facing | Type Flat Face (FF), Type B Raised Face (RF), Type C Tongue, Type D Groove, Type E Spigot, Type F Recess, Type G O-ring Spigot, Type H O-ring Groove, |
EN 1092-1 Type 11 Flanges Facing Types
NOTE 1
The transition from the edge of the raised face to the flange face may be by radius or chamfer for types B, D, F and G only (see 5.7.1).
NOTE 2
B1 and B2 are raised face (type B) for different applications (see 5.7.2.2, 5.7.2.3 and Table 2).
NOTE 3
For the dimensions of flange facings, see Figure 4 and Table 8.
Dimensions of EN 1092-1 Weld Neck Flange Type11 PN16
The specifications of weld neck flanges are mainly applicable to sizes ranging from DN10 to DN4000. The production standard is EN 1092-1. The following figure shows the sizes DN10-DN350 under some PN16.
Dimensions of PN 16 flanges
| DN | Mating dimensions | Outside diameter of neck | Flange thickness | Length | Neck diameters | ||||||||||||||
| Outside diameter | Diameter of bolt circle | Diameter of bolt hole | Bolting | ||||||||||||||||
| D | K | L | Number | Size | A | C1 | C2 | C3 | C4 | H1 | H2 | H3 | H4 | H5 | N1 | N2 | N3 | ||
| 01, 02, 04, 05, 11, 12, 13, 21 | 11 21 a 34 d 35 – 37 | 01 02 04 | 11 12 13 | 21 | 05 | 12 13 | 11 34 c,d | 11 34 c,d | 35 | 36 | 37 | 11 34 c, d | 12 13 | 21 | |||||
| 10 | 90 | 60 | 14 | 4 | M12 | 172 | 14 | 16 | 16 | 16 | 22 | 35 | 6 | 35 | 35 | 7 | 28 | 30 | 28 |
| 15 | 95 | 65 | 14 | 4 | M12 | 213 | 14 | 16 | 16 | 16 | 22 | 38 | 6 | 38 | 38 | 7 | 32 | 35 | 32 |
| 20 | 105 | 75 | 14 | 4 | M12 | 269 | 16 | 18 | 18 | 18 | 26 | 40 | 6 | 40 | 40 | 8 | 40 | 45 | 40 |
| 25 | 115 | 85 | 14 | 4 | M12 | 337 | 16 | 18 | 18 | 18 | 28 | 40 | 6 | 40 | 40 | 10 | 46 | 52 | 50 |
| 32 | 140 | 100 | 18 | 4 | M16 | 424 | 18 | 18 | 18 | 18 | 30 | 42 | 6 | 42 | 42 | 12 | 56 | 60 | 60 |
| 40 | 150 | 110 | 18 | 4 | M16 | 483 | 18 | 18 | 18 | 18 | 32 | 45 | 7 | 45 | 45 | 15 | 64 | 70 | 70 |
| 50 | 165 | 125 | 18 | 4 | M16 | 603 | 20 | 18 | 18 | 18 | 28 | 45 | 8 | 45 | 45 | 20 | 74 | 84 | 84 |
| 65 | 185 | 145 | 18 | 8b | M16 | 761 | 20 | 18 | 18 | 18 | 32 | 45 | 10 | 45 | 45 | 20 | 92 | 104 | 104 |
| 80 | 200 | 160 | 18 | 8 | M16 | 889 | 20 | 20 | 20 | 20 | 34 | 50 | 10 | 50 | 50 | 25 | 105 | 118 | 120 |
| 100 | 220 | 180 | 18 | 8 | M16 | 1,143 | 22 | 20 | 20 | 20 | 40 | 52 | 12 | 52 | 52 | 25 | 131 | 140 | 140 |
How to inspect EN1092-1 Type 11 Weld Neck Flange
Inspecting an EN 1092-1 Type 11 Weld Neck Flange is a crucial step to ensure its integrity, quality, and compliance with required standards before it is installed in a piping system.
Visual Inspection
External and Internal Surface: Check both the external and internal surfaces of the flange for visible cracks, pits, dents, or any other damage. Surface defects can affect the sealing and structural integrity.
Dimensional Inspection
Outside diameter (OD): The overall outer diameter of the flange should match the specified size.
Bolt circle diameter (BCD): Measure the distance between the centers of bolt holes to ensure it matches the design specification.
Flange thickness: Measure the thickness of the flange at different points (such as near the bolt holes and at the raised face) to ensure it complies with the required dimensions.
Bolt Hole Size: Ensure the bolt holes are of the correct size and spacing, and verify the alignment of the holes to ensure the bolts will fit properly.
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