In modern pipeline design, ASME B16.5 slip on flanges play an important role in pipeline connections. They are widely used in heavy industries such as petroleum, water conservancy, chemical engineering, electric power, and metallurgy, and are key components for ensuring the safe operation of pipeline systems. This article will focus on ASME B16.5 slip on flange dimension to help you make informed purchasing decisions.
ZIZI specializes in the generation of flanges in various materials and types, in strict compliance with international standards (e.g. EN 1092-1, ASME B16.5, etc.), and provides high-quality piping connection solutions to customers all over the world.
What Is Slip On Flange?
Slip on flange is a common type of pipe connection flange. It forms the connection of the pipe by sliding the inner hole of the flange to the end of the pipe and then welding and fixing it. Slip on flanges usually have a simple design and low cost. During installation, the flange only needs to slide into the end of the pipe for welding at both ends, which not only ensures the stability of the connection, but also facilitates installation and maintenance.
Slip on flanges are classified into six categories according to pressure ratings: 150#, 300#, 400#,600#, 900#,1500#.
Slip On Flange Class 150 lb:
Slip On Flange Dimensions Class 150 (ASME B16.5) in Millimeters.
| Nominal Pipe Size | A | B | C | D | F | G | H | I | J | Weight | |
| inch | mm | mm | mm | mm | mm | mm | mm | Holes | mm | mm | kg / piece |
| 1/2 | 21.3 | 88.9 | 22.4 | 11.2 | 15.7 | 30.2 | 35.1 | 4 | 15.7 | 60.45 | 0.39 |
| 3/4 | 26.7 | 98.6 | 27.7 | 12.7 | 15.7 | 38. 10 | 42.9 | 4 | 15.7 | 69.85 | 0.56 |
| 1 | 33.4 | 108 | 34.5 | 14.2 | 17.5 | 49.3 | 50.8 | 4 | 15.7 | 79.25 | 0.78 |
| 11/4 | 42.2 | 117.3 | 43.2 | 15.7 | 20.6 | 58.7 | 63.5 | 4 | 15.7 | 88.9 | 1.03 |
| 11/2 | 48.3 | 127 | 49.5 | 17.5 | 22.4 | 65 | 73.15 | 4 | 15.7 | 98.6 | 1.32 |
| 2 | 60.3 | 152.4 | 62 | 19.1 | 25.4 | 77.7 | 91.9 | 4 | 19.1 | 120.7 | 2.06 |
| 21/2 | 73 | 177.8 | 74.7 | 22.4 | 28.4 | 90.4 | 104.6 | 4 | 19.1 | 139.7 | 3.28 |
| 3 | 88.9 | 190.5 | 90.7 | 23.9 | 30.2 | 108 | 127 | 4 | 19.1 | 152.4 | 3.85 |
| 31/2 | 101.6 | 215.9 | 103.4 | 23.9 | 31.75 | 122.2 | 139.7 | 8 | 19.1 | 177.8 | 4.81 |
| 4 | 114.3 | 228.6 | 116.1 | 23.9 | 33.3 | 134.9 | 157.2 | 8 | 19.1 | 190.5 | 5.30 |
| 5 | 141.3 | 254 | 143.8 | 23.9 | 36.6 | 163.6 | 185.7 | 8 | 22.4 | 215.9 | 6.07 |
| 6 | 168.3 | 279.4 | 170.7 | 25.4 | 39.6 | 192 | 215.9 | 8 | 22.4 | 241.3 | 7.45 |
| 8 | 219.1 | 342.9 | 221.5 | 28.4 | 44.5 | 246.1 | 269.7 | 8 | 22.4 | 298.5 | 12.1 |
| 10 | 273 | 406.4 | 276.3 | 30.2 | 49.3 | 304.8 | 323.9 | 12 | 25.4 | 362 | 16.5 |
| 12 | 323.8 | 482.6 | 327.1 | 31.75 | 55.6 | 365.3 | 381 | 12 | 25.4 | 431.8 | 26.2 |
| 14 | 355.6 | 533.4 | 359.1 | 35.1 | 57.15 | 400.1 | 412.8 | 12 | 28.4 | 476.3 | 34.6 |
| 16 | 406.4 | 596.9 | 410.5 | 36.6 | 63.5 | 457.2 | 469.9 | 16 | 28.4 | 539.8 | 44.8 |
| 18 | 457.2 | 635 | 461.8 | 39.6 | 68.3 | 505 | 533.4 | 16 | 31.75 | 577.9 | 48.9 |
| 20 | 508 | 698.5 | 513.1 | 42.9 | 73.15 | 558.8 | 584.2 | 20 | 31.75 | 635 | 61.9 |
| 24 | 609.6 | 812.8 | 616 | 47.8 | 82.6 | 663.4 | 692.2 | 20 | 35.1 | 749.3 | 86.9 |
Slip On Flange Class 300 lb:
Slip On Flange Dimensions Class 300 (ASME B16.5) in Millimeters.
| Nominal Pipe Size | A | B | C | D | F | G | H | I | J | Weight | |
| inch | mm | mm | mm | mm | mm | mm | mm | Holes | mm | mm | kg / piece |
| 1/2 | 21.3 | 95.2 | 22.4 | 14.2 | 22.4 | 38.1 | 35.1 | 4 | 15.7 | 66.55 | 0.64 |
| 3/4 | 26.7 | 27.7 | 15.7 | 25.4 | 47.7 | 42.9 | 4 | 19.1 | 82.5 | 1. 12 | |
| 1 | 33.4 | 123.9 | 34.5 | 17.5 | 26.9 | 53.8 | 50.8 | 4 | 19.1 | 88.9 | 1.36 |
| 11/4 | 42.2 | 133.3 | 43.2 | 19 | 26.9 | 63.5 | 63.5 | 4 | 19.1 | 98.6 | 1.68 |
| 11/2 | 48.3 | 155.4 | 49.5 | 20.6 | 30.2 | 69.85 | 73.15 | 4 | 22.4 | 114.3 | 2.49 |
| 2 | 60.3 | 165.1 | 62 | 22.3 | 33.2 | 84 | 91.9 | 8 | 19.1 | 127 | 2.87 |
| 21/2 | 73 | 190.5 | 74.7 | 25.4 | 38.1 | 100 | 104.6 | 8 | 22.4 | 149.4 | 4.32 |
| 3 | 88.9 | 209.5 | 90.7 | 28.4 | 42.9 | 117.3 | 127 | 8 | 22.4 | 168.1 | 5.85 |
| 31/2 | 101.6 | 228.6 | 103.4 | 30.2 | 44.4 | 133.3 | 139.7 | 8 | 22.4 | 184.2 | 7.34 |
| 4 | 114.3 | 254 | 116.1 | 31.7 | 47.7 | 146 | 157.2 | 8 | 22.4 | 200.1 | 9.61 |
| 5 | 141.3 | 279.4 | 143.8 | 35 | 50.8 | 177.8 | 185.7 | 8 | 22.4 | 234.9 | 12.3 |
| 6 | 168.3 | 317.5 | 170.7 | 36.5 | 52.3 | 206.2 | 215.9 | 12 | 22.4 | 269.7 | 15.6 |
| 8 | 219. 1 | 381 | 221.5 | 41.1 | 61.9 | 260.3 | 269.7 | 12 | 25.4 | 330.2 | 24.2 |
| 10 | 273 | 444.5 | 276.3 | 47.7 | 66.55 | 320.5 | 323.9 | 16 | 28.4 | 387.3 | 34.1 |
| 12 | 323.8 | 520.7 | 327.1 | 50.8 | 73.15 | 374.6 | 381 | 16 | 31.7 | 450.8 | 49.8 |
| 14 | 355.6 | 584.2 | 359.1 | 53.8 | 76.2 | 425.4 | 412.8 | 20 | 31.7 | 514.4 | 69.9 |
| 16 | 406.4 | 647.7 | 410.5 | 57.15 | 82.5 | 482.6 | 469.9 | 20 | 35 | 571.5 | 88.1 |
| 18 | 457.2 | 711.2 | 461.8 | 60.45 | 88.9 | 533.4 | 533.4 | 24 | 35 | 628.7 | 109 |
| 20 | 508 | 774.7 | 513.1 | 63.5 | 95.2 | 587.2 | 584.2 | 24 | 35 | 685.8 | 134 |
| 24 | 609.6 | 914.4 | 616 | 69.85 | 106.4 | 701.5 | 692.2 | 24 | 41 | 812.8 | 201 |
Slip On Flange Class 400 lb:
Slip On Flange Dimensions Class 400 (ASME B16.5) in Millimeters.
| Nominal Pipe Size | A | B | C | D | F | G | H | I | J | Weight | |
| inch | mm | mm | mm | mm | mm | mm | mm | Holes | mm | mm | kg / piece |
| 1/2 | 21.3 | 95.3 | 22.4 | 14.2 | 22.4 | 38.1 | 35. 10 | 4 | 15.7 | 66.55 | 0.74 |
| 3/4 | 26.7 | 117.3 | 27.7 | 15.7 | 25.4 | 47.7 | 42.9 | 4 | 19.1 | 82.5 | 1.27 |
| 1 | 33.4 | 124 | 34.5 | 17.5 | 26.9 | 53.8 | 50.8 | 4 | 19.1 | 88.9 | 1.52 |
| 11/4 | 42.2 | 133.4 | 43.2 | 20.6 | 28.4 | 63.5 | 63.5 | 4 | 19.1 | 98.6 | 2.03 |
| 11/2 | 48.3 | 155.4 | 49.5 | 22.4 | 31.75 | 69.85 | 73. 15 | 4 | 22.4 | 114.3 | 2.96 |
| 2 | 60.3 | 165.1 | 62 | 25.4 | 36.6 | 84 | 91.9 | 8 | 19.1 | 127 | 3.62 |
| 21/2 | 73 | 190.5 | 74.7 | 28.4 | 41.1 | 100 | 104.6 | 8 | 22.4 | 149.4 | 5.28 |
| 3 | 88.9 | 209.6 | 90.7 | 31.75 | 46 | 117.3 | 127 | 8 | 22.4 | 168. 1 | 7.00 |
| 31/2 | 101.6 | 228.6 | 103.4 | 35.1 | 49.3 | 133.3 | 139.7 | 8 | 25.4 | 184.2 | 8.84 |
| 4 | 114.3 | 254 | 116.1 | 35.1 | 50.8 | 146 | 157.2 | 8 | 25.4 | 200. 1 | 11. 1 |
| 5 | 141.3 | 279.4 | 143.8 | 38.1 | 53.8 | 177.8 | 185.7 | 8 | 25.4 | 234.9 | 13.9 |
| 6 | 168.3 | 317.5 | 170.7 | 41.1 | 57.15 | 206.2 | 215.9 | 12 | 25.4 | 269.7 | 18.3 |
| 8 | 219.1 | 381 | 221.5 | 47.8 | 68.3 | 260.3 | 269.7 | 12 | 28.4 | 330.2 | 28.6 |
| 10 | 273 | 444.5 | 276.3 | 53.8 | 73.15 | 320.5 | 323.9 | 16 | 31.75 | 387.3 | 39.2 |
| 12 | 323.8 | 520.7 | 327. 1 | 57.15 | 79.25 | 374.6 | 381 | 16 | 35.1 | 450.8 | 57.0 |
| 14 | 355.6 | 584.2 | 359. 1 | 60.05 | 84.1 | 425.4 | 412.8 | 20 | 35.1 | 514.4 | 79.1 |
| 16 | 406.4 | 647.7 | 410.5 | 63.5 | 93.7 | 482.6 | 469.9 | 20 | 38.1 | 571.5 | 101 |
| 18 | 457.2 | 711.2 | 461.8 | 66.55 | 98.6 | 533.4 | 533.4 | 24 | 38.1 | 628.7 | 123 |
| 20 | 508 | 774.7 | 513. 1 | 69.85 | 101.6 | 587.2 | 584.2 | 24 | 41.1 | 685.8 | 146 |
| 24 | 609.6 | 914.4 | 616 | 76.2 | 114.3 | 701.5 | 692.2 | 24 | 47.8 | 812.8 | 219 |
Slip On Flange Class 600 lb:
Slip On Flange Dimensions Class 600 (ASME B16.5) in Millimeters.
| Nominal Pipe Size | A | B | C | D | F | G | H | I | J | Weight | |
| inch | mm | mm | mm | mm | mm | mm | mm | Holes | mm | mm | kg / piece |
| 1/2 | 21.3 | 95.3 | 22.4 | 14.2 | 22.4 | 38.1 | 35.1 | 4 | 15.7 | 66.55 | 0.74 |
| 3/4 | 26.7 | 117.3 | 27.7 | 15.7 | 25.4 | 47.8 | 42.9 | 4 | 19.1 | 82.6 | 1.27 |
| 1 | 33.4 | 124 | 34.5 | 17.5 | 26.9 | 53.8 | 50.8 | 4 | 19.1 | 88.9 | 1.52 |
| 11/4 | 42.2 | 133.4 | 43.2 | 20.6 | 28.4 | 63.5 | 63.5 | 4 | 19.1 | 98.6 | 2.03 |
| 11/2 | 48.3 | 155.4 | 49.5 | 22.4 | 31.75 | 69.85 | 73.15 | 4 | 22.4 | 114.3 | 2.96 |
| 2 | 60.3 | 165.1 | 62 | 25.4 | 36.6 | 84.1 | 91.9 | 8 | 19.1 | 127 | 3.62 |
| 21/2 | 73 | 190.5 | 74.7 | 28.4 | 41.1 | 100.1 | 104.6 | 8 | 22.4 | 149.4 | 5.28 |
| 3 | 88.9 | 209.6 | 90.7 | 31.75 | 46 | 117.3 | 127 | 8 | 22.4 | 168.1 | 7.00 |
| 31/2 | 101.6 | 228.6 | 103.4 | 35.1 | 49.3 | 133.4 | 139.7 | 8 | 25.4 | 184.2 | 8.84 |
| 4 | 114.3 | 273.1 | 116.1 | 38.1 | 53.8 | 152.4 | 157.2 | 8 | 25.4 | 215.9 | 14.5 |
| 5 | 141.3 | 330.2 | 143.8 | 44.5 | 60.45 | 189 | 185.7 | 8 | 28.4 | 266.7 | 24.4 |
| 6 | 168.3 | 355.6 | 170.7 | 47.8 | 66.55 | 222.3 | 215.9 | 12 | 28.4 | 292.1 | 28.7 |
| 8 | 219. 1 | 419.1 | 221.5 | 55.6 | 76.2 | 273.1 | 269.7 | 12 | 31.75 | 349.3 | 43.4 |
| 10 | 273 | 508 | 276.3 | 63.5 | 85.9 | 342.9 | 323.9 | 16 | 35.1 | 431.8 | 70.3 |
| 12 | 323.8 | 558.8 | 327.1 | 66.55 | 91.9 | 400.1 | 381 | 20 | 35.1 | 489 | 84.2 |
| 14 | 355.6 | 603.3 | 359.1 | 69.85 | 93.7 | 431.8 | 412.8 | 20 | 38.1 | 527.1 | 98.7 |
| 16 | 406.4 | 685.8 | 410.5 | 76.2 | 106.4 | 495.3 | 469.9 | 20 | 41.1 | 603.3 | 142 |
| 18 | 457.2 | 743 | 461.8 | 82.6 | 117.3 | 546.1 | 533.4 | 20 | 44.5 | 654.1 | 173 |
| 20 | 508 | 812.8 | 513.1 | 88.9 | 127 | 609.6 | 584.2 | 24 | 44.5 | 723.9 | 220 |
| 24 | 609.6 | 939.8 | 616 | 101.6 | 139.7 | 717.6 | 692.2 | 24 | 50.8 | 838.2 | 312 |
Slip On Flange Class 900 lb:
Slip On Flange Dimensions Class 900 (ASME B16.5) in Millimeters.
| Nominal Pipe Size | A | B | C | D | F | G | H | I | J | Weight | |
| inch | mm | mm | mm | mm | mm | mm | mm | Holes | mm | mm | kg / piece |
| 1/2 | 21.3 | 120.6 | 22.4 | 22.4 | 31.7 | 38. 10 | 35.1 | 4 | 22.4 | 82.5 | 1.74 |
| 3/4 | 26.7 | 130 | 27.7 | 25.4 | 35 | 44.4 | 42.9 | 4 | 22.4 | 88.9 | 2.34 |
| 1 | 33.4 | 149.3 | 34.5 | 28.4 | 41.1 | 52.3 | 50.8 | 4 | 25.4 | 101.6 | 3.44 |
| 11/4 | 42.2 | 158.7 | 43.2 | 28.4 | 41.1 | 63.5 | 63.5 | 4 | 25.4 | 111.2 | 3.91 |
| 11/2 | 48.3 | 177.8 | 49.5 | 31.7 | 44.5 | 69.85 | 73.15 | 4 | 28.4 | 123.9 | 5.36 |
| 2 | 60.3 | 215.9 | 62 | 38.1 | 57.15 | 104.6 | 91.9 | 8 | 25.4 | 165.1 | 9.85 |
| 21/2 | 73 | 244.3 | 74.7 | 41.1 | 63.5 | 123.9 | 104.6 | 8 | 28.4 | 190.5 | 13.7 |
| 3 | 88.9 | 241.3 | 90.7 | 38.1 | 53.8 | 127 | 127 | 8 | 25.4 | 190.5 | 11.6 |
| 4 | 114.3 | 292.1 | 116.1 | 44.4 | 69.85 | 158.7 | 157.2 | 8 | 31.7 | 234.9 | 19.7 |
| 5 | 141.3 | 349.2 | 143.8 | 50.8 | 79.25 | 190.5 | 185.7 | 8 | 35 | 279.4 | 31.9 |
| 6 | 168.3 | 381 | 170.7 | 55.6 | 85.8 | 234.9 | 215.9 | 12 | 31.7 | 317.5 | 41.1 |
| 8 | 219.1 | 469.9 | 221.5 | 63.5 | 101.6 | 298.4 | 269.7 | 12 | 38.1 | 393.7 | 70.7 |
| 10 | 273 | 546.1 | 276.3 | 69.85 | 107.9 | 368.3 | 323.9 | 16 | 38.1 | 469.9 | 101 |
| 12 | 323.8 | 609.6 | 327.1 | 79.25 | 117.3 | 419.1 | 381 | 20 | 38.1 | 533.4 | 133 |
| 14 | 355.6 | 641.3 | 359.1 | 85.8 | 130 | 450.8 | 412.8 | 20 | 41.1 | 558.8 | 153 |
| 16 | 406.4 | 704.8 | 410.5 | 88.9 | 133.3 | 508 | 469.9 | 20 | 44.4 | 615.9 | 185 |
| 18 | 457.2 | 787.4 | 461.8 | 101.6 | 152.4 | 565.1 | 533.4 | 20 | 50.8 | 685.8 | 258 |
| 20 | 508 | 857.2 | 513.1 | 107.9 | 158.7 | 622.3 | 584.2 | 20 | 53.8 | 749.3 | 317 |
| 24 | 609.6 | 1041.4 | 616 | 139.7 | 203.2 | 749.3 | 692.2 | 20 | 66.55 | 901.7 | 606 |
Slip On Flange Class 1500 lb:
Slip On Flange Dimensions Class 1500 (ASME B16.5) in Millimeters.
| Nominal Pipe Size | A | B | C | D | F | G | H | I | J | Weight | |
| inch | mm | mm | mm | mm | mm | mm | mm | Holes | mm | mm | kg / piece |
| 1/2 | 21.3 | 120.6 | 22.4 | 22.4 | 31.7 | 38.1 | 35.1 | 4 | 22.4 | 82.5 | 1.74 |
| 3/4 | 26.7 | 130 | 27.7 | 25.4 | 35 | 44.4 | 42.9 | 4 | 22.4 | 88.9 | 2.34 |
| 1 | 33.4 | 149.3 | 34.5 | 28.4 | 41.1 | 52.3 | 50.8 | 4 | 25.4 | 101.6 | 3.44 |
| 11/4 | 42.2 | 158.7 | 43.2 | 28.4 | 41.1 | 63.5 | 63.5 | 4 | 25.4 | 111.2 | 3.91 |
| 11/2 | 48.3 | 177.8 | 49.5 | 31.7 | 44.5 | 69.85 | 73.15 | 4 | 28.4 | 123.9 | 5.36 |
| 2 | 60.3 | 215.9 | 62 | 38.1 | 57.15 | 104.6 | 91.9 | 8 | 25.4 | 165.1 | 9.85 |
| 21/2 | 73 | 244.3 | 74.7 | 41.1 | 63.5 | 123.9 | 104.6 | 8 | 28.4 | 190.5 | 13.7 |
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