Technical information / Connection standards / ASME B16.5 · Slip-on flange
End connection standard
ASME B16.5 · SLIP-ON
Slip-on flange dimensions
The CSV uses semicolons as separators. The link carries the selected class and size.
| NPS | DN | D | k | n | lhole | b | Bbore | g | f | mhub | h | kg |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/2" | DN15 | 89 | 60.3 | 4 | 15.9 | 11.1 | 22.3 | 34.9 | 1.6 | 30.2 | 15.9 | 0.4 |
| 3/4" | DN20 | 98 | 69.8 | 4 | 15.9 | 12.7 | 27.7 | 42.9 | 1.6 | 38.1 | 15.9 | 0.6 |
| 1" | DN25 | 108 | 79.4 | 4 | 15.9 | 14.3 | 34.5 | 50.8 | 1.6 | 49.2 | 17.5 | 0.8 |
| 1 1/4" | DN32 | 117 | 88.9 | 4 | 15.9 | 15.9 | 43.2 | 63.5 | 1.6 | 59 | 20.6 | 1 |
| 1 1/2" | DN40 | 127 | 98.4 | 4 | 15.9 | 17.5 | 49.5 | 73.2 | 1.6 | 65 | 22.6 | 1.3 |
| 2" | DN50 | 152 | 120.6 | 4 | 19 | 19 | 62 | 92.1 | 1.6 | 77.8 | 25.4 | 2.1 |
| 2 1/2" | DN65 | 178 | 139.7 | 4 | 19.1 | 22.3 | 74.7 | 104.6 | 1.6 | 90 | 28.6 | 3.3 |
| 3" | DN80 | 190 | 152.4 | 4 | 19 | 23.8 | 90.7 | 127 | 1.6 | 107.9 | 30.2 | 3.8 |
| 3 1/2" | DN90 | 216 | 177.8 | 8 | 19.1 | 23.9 | 103.4 | 139.7 | 1.6 | 122 | 31.6 | 4.8 |
| 4" | DN100 | 229 | 190.5 | 8 | 19 | 23.8 | 116.1 | 157.2 | 1.6 | 134.9 | 33.3 | 5.3 |
| 5" | DN125 | 254 | 215.9 | 8 | 22.2 | 23.8 | 143.8 | 185.7 | 1.6 | 163.6 | 36.5 | 6.1 |
| 6" | DN150 | 279 | 241.3 | 8 | 22.2 | 25.4 | 170.7 | 215.9 | 1.6 | 192.1 | 39.7 | 7.4 |
| 8" | DN200 | 343 | 298.4 | 8 | 22.2 | 28.6 | 221.5 | 269.9 | 1.6 | 246.1 | 44.4 | 12.1 |
| 10" | DN250 | 406 | 362 | 12 | 25.4 | 30.2 | 276.3 | 323.8 | 1.6 | 304.8 | 49.2 | 16.5 |
| 12" | DN300 | 483 | 431.8 | 12 | 25.4 | 31.8 | 327.1 | 381 | 1.6 | 365.1 | 55.6 | 26.3 |
| 14" | DN350 | 533 | 476.2 | 12 | 28.6 | 34.9 | 359.1 | 412.7 | 1.6 | 400 | 57.1 | 34.5 |
| 16" | DN400 | 597 | 539.7 | 16 | 28.6 | 36.5 | 410.5 | 469.9 | 1.6 | 457.2 | 63.5 | 44.9 |
| 18" | DN450 | 635 | 577.8 | 16 | 31.8 | 39.7 | 461.8 | 533.4 | 1.6 | 504.8 | 68.3 | 48.9 |
| 20" | DN500 | 698 | 635 | 20 | 31.8 | 42.9 | 513.1 | 584.2 | 1.6 | 558.8 | 73 | 61.8 |
| 22" | DN550 | 750 | 692.1 | 20 | 34.9 | 46 | 564.4 | 641.2 | 1.6 | 609.6 | 79.4 | 72 |
| 24" | DN600 | 813 | 749.3 | 20 | 34.9 | 47.6 | 615.9 | 692.1 | 1.6 | 663.6 | 82.5 | 87.2 |
| 26" | DN650 | 869.9 | 806.4 | 24 | 34.9 | 50.8 | 666.7 | 742.9 | 1.6 | 723.9 | 85.7 | 104.1 |
| 28" | DN700 | 927.1 | 863.6 | 28 | 34.9 | 52.4 | 717.5 | 793.7 | 1.6 | 781 | 87.3 | 119 |
| 30" | DN750 | 984.2 | 914.4 | 28 | 34.9 | 54 | 768.3 | 857 | 1.6 | 831.8 | 88.9 | 134.6 |
| 32" | DN800 | 1060.4 | 977.9 | 28 | 41.3 | 57.1 | 819.1 | 908 | 1.6 | 889 | 92.1 | 166.3 |
| 34" | DN850 | 1111.2 | 1028.7 | 32 | 41.3 | 58.7 | 869.9 | 958.8 | 1.6 | 939.8 | 93.7 | 178.1 |
| 36" | DN900 | 1168.4 | 1085.8 | 32 | 41.3 | 60.3 | 920.7 | 1022.3 | 1.6 | 996.9 | 95.2 | 201.1 |
| 38" | DN950 | 1238.2 | 1149.3 | 32 | 41.3 | 60.3 | 971.5 | 1073.1 | 1.6 | 1060.4 | 95.2 | 234.6 |
| 40" | DN1000 | 1289 | 1200.1 | 36 | 41.3 | 63.5 | 1022.3 | 1123.9 | 1.6 | 1111.2 | 98.4 | 255 |
| 42" | DN1050 | 1346.2 | 1257.3 | 36 | 41.3 | 66.7 | 1073.1 | 1193.8 | 1.6 | 1168.4 | 101.6 | 289.4 |
| 44" | DN1100 | 1403.3 | 1314.4 | 40 | 41.3 | 66.7 | 1123.9 | 1244.6 | 1.6 | 1219.2 | 101.6 | 307.1 |
| 46" | DN1150 | 1454.1 | 1365.2 | 40 | 41.3 | 68.3 | 1174.7 | 1295.4 | 1.6 | 1270 | 103.2 | 327.3 |
| 48" | DN1200 | 1511.3 | 1422.4 | 44 | 41.3 | 69.8 | 1225.5 | 1358.9 | 1.6 | 1327.1 | 104.8 | 357 |
Notes
- This table has been compiled by Emsal from the relevant standards. For the full text of the standard, refer to ASME.
- Dimensions are converted from the standard's inch values; the standard's own mm table rounds the outside diameter (D) (e.g. 90 instead of 89).
- Raised face (f): 1.6 mm for Class 150 and 300 and included in the thickness (b); 6.4 mm for Class 600 and 900 and not included in the thickness (ASME B16.5).
- 26"–48": ASME B16.5 ends at NPS 24; these sizes are BS 3293 dimensions (shown faded in the table).
- Accuracy and currency are not guaranteed; use the current edition of the standard for design and purchasing decisions. How the library is compiled →
Dimension letters
| D | Flange outside diameter | B | Flange bore |
| k | Bolt circle diameter | g | Raised face diameter |
| b | Flange thickness | f | Raised face height |
| m | Hub diameter | h | Length through hub |
| l | Bolt hole diameter | n | Number of bolts |
Joint type and P&ID symbol
The slip-on flange is slipped over the pipe, with the pipe end set back from the flange face by about one wall thickness. Two fillet welds are made, one at the back of the hub and one at the bore.
flangepipegasketweldbolt, nut
- Slip the flange onto the pipe so that the pipe end sits about one wall thickness back from the gasket face.
- Make the outer fillet weld at the back of the hub and the inner weld at the pipe end; the inner weld must not protrude beyond the gasket face.
- Fit the gasket and tighten the bolts in a cross pattern.
Cheaper than a weld neck and easy to align; common at moderate pressures and temperatures. Weld neck flanges are preferred for lines with vibration or high temperatures.
P&ID: Flanged jointTwo short heavy lines perpendicular to the pipeline; the flange type is not shown on the diagram but given in the line list. Symbol library →
Not to scale; proportions are indicative.
