Description
Product Description EN 1092-1 Type 11 Weld Neck Flange
The EN 1092-1 Type 11 Weld Neck Flange is a premium-quality flange designed for high-pressure applications, offering exceptional strength and durability. Its long tapered hub reduces stress concentration at the base by providing reinforcement and facilitating a seamless transition between the pipe and the flange.
Key Features:
- Material Compatibility: Available in various materials such as carbon steel, stainless steel, and alloy steel to suit different industrial applications.
- Design: The long tapered hub enhances the flange’s structural integrity and makes it ideal for high-pressure and high-temperature environments.
- Standards Compliance: Manufactured in accordance with EN 1092-1 specifications, ensuring compatibility and quality.
- Applications: Widely used in oil and gas, petrochemical, chemical, power plants, and other industries.
EN 1092-1 Type 11 Dimensions
Class 150 Weld Neck Flange Dimensions
Size in Inch Size in mm Outer Diameter Flange Thickness Hub OD Weld Neck OD Welding Neck Length Bore RF Diameter RF Height PCD Weld Face
A B C D E F G H I J
1/2 15 90 9.6 30 21.3 46 34.9 2 60.3 1.6
3/4 20 100 11.2 38 26.7 51 42.9 2 69.9 1.6
1 25 110 12.7 49 33.4 54 50.8 2 79.4 1.6
1 1/4 32 115 14.3 59 42.2 56 63.5 2 88.9 1.6
1 1/2 40 125 15.9 65 48.3 60 73 2 98.4 1.6
2 50 150 17.5 78 60.3 62 92.1 2 120.7 1.6
2 1/2 65 180 20.7 90 73 68 104.8 2 139.7 1.6
3 80 190 22.3 108 88.9 68 127 2 152.4 1.6
3 1/2 90 215 22.3 122 101.6 70 Welding Neck bore is derived from the pipe schedule 139.7 2 177.8 1.6
4 100 230 22.3 135 114.3 75 157.2 2 190.5 1.6
5 125 255 22.3 164 141.3 87 185.7 2 215.9 1.6
6 150 280 23.9 192 168.3 87 215.9 2 241.3 1.6
8 200 345 27 246 219.1 100 269.9 2 298.5 1.6
10 250 405 28.6 305 273 100 323.8 2 362 1.6
12 300 485 30.2 365 323.8 113 381 2 431.8 1.6
14 350 535 33.4 400 355.6 125 412.8 2 476.3 1.6
16 400 595 35 457 406.4 125 469.9 2 539.8 1.6
18 450 635 38.1 505 457.2 138 533.4 2 577.9 1.6
20 500 700 41.3 559 508 143 584.2 2 635 1.6
24 600 815 46.1 663 610 151 692.2 2 749.3 1.6
Class 150 Weld Neck Flange Stud & Bolt Dimensions
Size in Inch Size in mm No of Bolts Bolt Size UNC Machine Bolt Length RF Stud Length Hole Size ISO Stud Size Weight in kg
1/2 15 4 1/2 50 55 5/8 M14 0.6
3/4 20 4 1/2 50 65 5/8 M14 0.9
1 25 4 1/2 55 65 5/8 M14 1.4
1 1/4 32 4 1/2 55 70 5/8 M14 1.4
1 1/2 40 4 1/2 65 70 5/8 M14 1.8
2 50 4 5/8 70 85 3/4 M16 2.7
2 1/2 65 4 5/8 75 90 3/4 M16 3.7
3 80 4 5/8 75 90 3/4 M16 4.6
3 1/2 90 8 5/8 75 90 3/4 M16 5.5
4 100 8 5/8 75 90 3/4 M16 6.8
5 125 8 3/4 85 95 7/8 M20 8.7
6 150 8 3/4 85 100 7/8 M20 10.9
8 200 8 3/4 90 110 7/8 M20 17.7
10 250 12 7/8 100 115 1 M24 24
12 300 12 7/8 100 120 1 M24 37
14 350 12 1 115 135 1 1/8 M27 50
16 400 16 1 115 135 1 1/8 M27 64
18 450 16 1 1/8 125 145 1 1/4 M30 68
20 500 20 1 1/8 140 160 1 1/4 M30 82
24 600 20 1 1/4 150 170 1 3/8 M33 118
Class 300 Weld Neck Flange Dimensions
Size in Inch Size in mm Outer Diameter Flange Thickness Hub OD Weld Neck OD Welding Neck Length Bore RF Diameter RF Height PCD Weld Face
A B C D E F G H I J
1/2 15 95 12.7 38 21.3 51 34.9 2 66.7 1.6
3/4 20 115 14.3 48 26.7 56 42.9 2 82.6 1.6
1 25 125 15.9 54 33.4 60 50.8 2 88.9 1.6
1 1/4 32 135 17.5 64 42.2 64 63.5 2 98.4 1.6
1 1/2 40 155 19.1 70 48.3 67 73 2 114.3 1.6
2 50 165 20.7 84 60.3 68 92.1 2 127 1.6
2 1/2 65 190 23.9 100 73 75 104.8 2 149.2 1.6
3 80 210 27 117 88.9 78 127 2 168.3 1.6
3 1/2 90 230 28.6 133 101.6 79 Welding Neck bore is derived from the pipe schedule 139.7 2 184.2 1.6
4 100 255 30.2 146 114.3 84 157.2 2 200 1.6
5 125 280 33.4 178 141.3 97 185.7 2 235 1.6
6 150 320 35 206 168.3 97 215.9 2 269.9 1.6
8 200 380 39.7 260 219.1 110 269.9 2 330.2 1.6
10 250 445 46.1 321 273 116 323.8 2 387.4 1.6
12 300 520 49.3 375 323.8 129 381 2 450.8 1.6
14 350 585 52.4 425 355.6 141 412.8 2 514.4 1.6
16 400 650 55.6 483 406.4 144 469.9 2 571.5 1.6
18 450 710 58.8 533 457 157 533.4 2 628.6 1.6
20 500 775 62 587 508 160 584.2 2 685.8 1.6
24 600 915 68.3 702 610 167 692.2 2 812.8 1.6
Class 300 Weld Neck Flange Stud & Bolt Dimensions
Size in Inch Size in mm No of Bolts Bolt Size UNC Machine Bolt Length RF Stud Length Hole Size ISO Stud Size Weight in kg
1/2 15 4 1/2 55 65 5/8 M14 1.4
3/4 20 4 5/8 65 75 3/4 M16 1.4
1 25 4 5/8 65 75 3/4 M16 1.8
1 1/4 32 4 5/8 70 85 3/4 M16 2.3
1 1/2 40 4 3/4 75 90 7/8 M20 3.2
2 50 8 5/8 75 90 3/4 M16 4.1
2 1/2 65 8 3/4 85 100 7/8 M20 5.5
3 80 8 3/4 90 110 7/8 M20 6.8
3 1/2 90 8 3/4 95 110 7/8 M20 8.2
4 100 8 3/4 95 115 7/8 M20 11.4
5 125 8 3/4 110 120 7/8 M20 14.6
6 150 12 3/4 110 120 7/8 M20 19.1
8 200 12 7/8 120 140 1 M24 31
10 250 16 1 140 160 1 1/8 M27 42
12 300 16 1 1/8 145 170 1 1/4 M30 64
14 350 20 1 1/8 160 180 1 1/4 M30 82
16 400 20 1 1/4 165 190 1 3/8 M33 113
18 450 24 1 1/4 170 195 1 3/8 M33 145
20 500 24 1 1/4 185 205 1 3/8 M33 182
24 600 24 1 1/2 205 230 1 5/8 M39 264
Weld Neck Flange Weight Chart
Flange Size (inches) Class 150 (lbs) Class 300 (lbs) Class 400 (lbs) Class 600 (lbs) Class 900 (lbs) Class 1500 (lbs) Class 2500 (lbs)
½ 2 2 3 3 7 7 8
¾ 2 3 3.5 4 7 7 9
1 3 4 4 4 8.5 8.5 13
1¼ 3 5 4.5 6 10 10 20
1½ 4 7 8 8 14 14 28
2 6 9 10 12 24 24 42
2½ 10 12 14 18 31 31 52
3 11.5 18 18 23 36 36 94
3½ 12 20 26 26 53 53 146
4 16.5 26.5 35 42 86 86 244
5 21 36 43 68 110 110 378
6 26 45 57 81 187 187 576
8 42 69 89 120 268 268 1068
10 54 100 125 190 372 372 1608
12 88 142 175 226 562 562 -
14 114 206 233 347 685 685 -
16 140 250 295 481 924 924 -
18 165 320 360 555 1164 1164 -
20 197 400 445 690 2107 2107 -
22 225 465 505 720 - - -
24 268 580 640 977 - - -
Pressure Ratings:
- PN6: Suitable for low-pressure applications (6 bar or ~87 psi).
- PN10: For moderate pressure applications (10 bar or ~145 psi).
- PN16: Widely used in industrial applications (16 bar or ~232 psi).
- PN25: Designed for higher pressures (25 bar or ~362 psi).
- PN40: Ideal for medium to high-pressure systems (40 bar or ~580 psi).
- PN63: Used in high-pressure systems (63 bar or ~914 psi).
- PN100: For very high-pressure applications (100 bar or ~1450 psi).
Advantages:
- Durability: Superior mechanical strength for long service life.
- Leak-Proof Connection: Perfect for critical applications where a secure, leak-proof connection is essential.
- Corrosion Resistance: Enhanced resistance to corrosion and oxidation when using stainless or alloy steel grades.
Applications:
- Piping systems in chemical processing plants
- High-temperature and pressure pipelines in oil and gas refineries
- Power generation facilities
- Industrial applications requiring precise flow control and high strength








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