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ASME B16.5 Class 150 pipe flanges, NPS ½ to 24: dimensions, bolt circle, slip-on and blind
What are the dimensions of an ASME B16.5 Class 150 flange (OD, thickness, raised face, bolt circle, bolt holes)? · Standard part · basis: ASME B16.5 Class 150 dimensions as printed in manufacturer and distributor tables (Texas Flange, inch; cross-checked against a second table in mm); the standard itself is paywalled
Also called: 150# flange dimensions, 150 lb flange dimensions, class 150 flange dimensions, 2 inch class 150 flange, 150 pound flange size chart, b16.5 class 150, ansi 150 flange, 150# slip on flange, 150# blind flange, 150# flange bolt circle, pipe flange dimensions, ansi flange dimensions, asme b16.5 flange dimensions, slip on flange dimensions, blind flange dimensions, raised face flange dimensions
Exact dimensions. True size, with no printing tolerance added.
- sizes
- 20 in table
Notes
- Weld-neck, slip-on, blind, socket-weld and threaded flanges of one size and class share the flange OD, raised face, bolt circle, bolt holes and bolting; they differ in the hub, bore and length columns. Thickness is the minimum with the 1/16 in raised face included.
- Raised face: 1/16 in (1.6 mm) high on Class 150 and 300. The flat plate is the printed thickness less that 1/16 in.
- Holes are the bolt diameter plus 1/8 in, as the tables state; hole count and bolt diameter match the stud tables. Bolt holes straddle the vertical centreline in the files (the usual layout, not printed in the cited tables).
- Files: for every NPS from ½ to 24, a blind flange and a slip-on flange at true size. The slip-on hub is drawn as a plain cylinder at the printed base diameter to the printed length: the tables do not print a hub taper, so none is drawn. The bore is the printed slip-on bore (pipe OD plus about 1 mm).
- Not in the files: weld-neck flanges (hub taper and bevel are not printed; the base diameter and length are in the table), socket-weld and threaded flanges (their bore and thread columns are labelled ambiguously in the sources), weld bevels, fillet radii, the serrated finish of the face, and NPS 22 (printed by one source only).
- Tables print inch; millimetres are the inch value × 25.4. The separate metric table of B16.5 rounds some sizes differently (for example NPS 1 Class 150 OD 110 mm against 4.25 in = 108 mm); the inch table is used here.
- Class 300 is on its own page: asme-b16-5-class-300-flanges. Bolt pattern lookup for both classes: asme-b16-5-flange-bolt-patterns.
ASME B16.5 Class 150 pipe flanges, NPS ½ to 24: dimensions, bolt… size chart
| NPS | flange OD, in (mm) | thickness incl. raised face, in (mm) | raised-face dia, in (mm) | bolt circle, in (mm) | holes × hole dia, in | bolt dia, in | hub dia at base, in (mm) | slip-on hub length, in | weld-neck length, in | slip-on bore, in | weld-neck end OD, in |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/2 | 3.50 (88.9) | 0.44 (11.1) | 1.38 (34.9) | 2.38 (60.3) | 4 × 0.625 | 0.5 | 1.19 (30.2) | 0.56 | 1.81 | 0.88 | 0.84 |
| 3/4 | 3.88 (98.4) | 0.50 (12.7) | 1.69 (42.9) | 2.75 (69.8) | 4 × 0.625 | 0.5 | 1.50 (38.1) | 0.56 | 2.00 | 1.09 | 1.05 |
| 1 | 4.25 (107.9) | 0.56 (14.3) | 2.00 (50.8) | 3.12 (79.4) | 4 × 0.625 | 0.5 | 1.94 (49.2) | 0.62 | 2.12 | 1.36 | 1.32 |
| 1-1/4 | 4.62 (117.5) | 0.62 (15.9) | 2.50 (63.5) | 3.50 (88.9) | 4 × 0.625 | 0.5 | 2.31 (58.7) | 0.75 | 2.19 | 1.70 | 1.66 |
| 1-1/2 | 5.00 (127.0) | 0.69 (17.5) | 2.88 (73.0) | 3.88 (98.4) | 4 × 0.625 | 0.5 | 2.56 (65.1) | 0.81 | 2.38 | 1.95 | 1.90 |
| 2 | 6.00 (152.4) | 0.75 (19.0) | 3.62 (92.1) | 4.75 (120.6) | 4 × 0.75 | 0.625 | 3.06 (77.8) | 0.94 | 2.44 | 2.44 | 2.38 |
| 2-1/2 | 7.00 (177.8) | 0.88 (22.2) | 4.12 (104.8) | 5.50 (139.7) | 4 × 0.75 | 0.625 | 3.56 (90.5) | 1.06 | 2.69 | 2.94 | 2.88 |
| 3 | 7.50 (190.5) | 0.94 (23.8) | 5.00 (127.0) | 6.00 (152.4) | 4 × 0.75 | 0.625 | 4.25 (107.9) | 1.12 | 2.69 | 3.57 | 3.50 |
| 3-1/2 | 8.50 (215.9) | 0.94 (23.8) | 5.50 (139.7) | 7.00 (177.8) | 8 × 0.75 | 0.625 | 4.81 (122.2) | 1.19 | 2.75 | 4.07 | 4.00 |
| 4 | 9.00 (228.6) | 0.94 (23.8) | 6.19 (157.2) | 7.50 (190.5) | 8 × 0.75 | 0.625 | 5.31 (134.9) | 1.25 | 2.94 | 4.57 | 4.50 |
| 5 | 10.00 (254.0) | 0.94 (23.8) | 7.31 (185.7) | 8.50 (215.9) | 8 × 0.875 | 0.75 | 6.44 (163.5) | 1.38 | 3.44 | 5.66 | 5.56 |
| 6 | 11.00 (279.4) | 1.00 (25.4) | 8.50 (215.9) | 9.50 (241.3) | 8 × 0.875 | 0.75 | 7.56 (192.1) | 1.50 | 3.44 | 6.72 | 6.63 |
| 8 | 13.50 (342.9) | 1.12 (28.6) | 10.62 (269.9) | 11.75 (298.4) | 8 × 0.875 | 0.75 | 9.69 (246.1) | 1.69 | 3.94 | 8.72 | 8.63 |
| 10 | 16.00 (406.4) | 1.19 (30.2) | 12.75 (323.8) | 14.25 (361.9) | 12 × 1 | 0.875 | 12.00 (304.8) | 1.88 | 3.94 | 10.88 | 10.75 |
| 12 | 19.00 (482.6) | 1.25 (31.8) | 15.00 (381.0) | 17.00 (431.8) | 12 × 1 | 0.875 | 14.38 (365.1) | 2.12 | 4.44 | 12.88 | 12.75 |
| 14 | 21.00 (533.4) | 1.38 (34.9) | 16.25 (412.8) | 18.75 (476.2) | 12 × 1.125 | 1 | 15.75 (400.0) | 2.19 | 4.94 | 14.14 | 14.00 |
| 16 | 23.50 (596.9) | 1.44 (36.5) | 18.50 (469.9) | 21.25 (539.8) | 16 × 1.125 | 1 | 18.00 (457.2) | 2.44 | 4.94 | 16.16 | 16.00 |
| 18 | 25.00 (635.0) | 1.56 (39.7) | 21.00 (533.4) | 22.75 (577.9) | 16 × 1.25 | 1.125 | 19.88 (504.8) | 2.62 | 5.44 | 18.18 | 18.00 |
| 20 | 27.50 (698.5) | 1.69 (42.9) | 23.00 (584.2) | 25.00 (635.0) | 20 × 1.25 | 1.125 | 22.00 (558.8) | 2.81 | 5.62 | 20.20 | 20.00 |
| 24 | 32.00 (812.8) | 1.88 (47.6) | 27.25 (692.1) | 29.50 (749.3) | 20 × 1.375 | 1.25 | 26.12 (663.6) | 3.19 | 5.94 | 24.25 | 24.00 |
Where the files are
Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.
| Texas Flange | ANSI B16.5 Class 150 forged flange dimensions (inch) | web | Publisher's page; dimensions are facts |
| Wermac | Weld neck flanges ASME B16.5 Class 150 (inch) with stud bolt table | web | Publisher's page; dimensions are facts |
| Project Materials | Slip-on flange dimensions ASME B16.5 Class 150 and 300 (mm) | web | Publisher's page; dimensions are facts |
Free files
★ Free files 40 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json
| flange-150-nps0p5-blind | Blind flange, NPS 1/2 Class 150: OD 88.9 mm, raised face dia 34.9 x 1.6 mm, bolt circle 60.3 mm, 4 holes dia 15.9 mm for 0.5 in bolts; thickness 11.1 mm including the raised face | STEP · STL |
| flange-150-nps0p5-slip-on | Slip-on flange, NPS 1/2 Class 150: OD 88.9 mm, raised face dia 34.9 x 1.6 mm, bolt circle 60.3 mm, 4 holes dia 15.9 mm for 0.5 in bolts; bore 22.4 mm, hub dia 30.2 mm drawn straight, length 14.2 mm from the raised face to the hub end | STEP · STL |
| flange-150-nps0p75-blind | Blind flange, NPS 3/4 Class 150: OD 98.4 mm, raised face dia 42.9 x 1.6 mm, bolt circle 69.8 mm, 4 holes dia 15.9 mm for 0.5 in bolts; thickness 12.7 mm including the raised face | STEP · STL |
| flange-150-nps0p75-slip-on | Slip-on flange, NPS 3/4 Class 150: OD 98.4 mm, raised face dia 42.9 x 1.6 mm, bolt circle 69.8 mm, 4 holes dia 15.9 mm for 0.5 in bolts; bore 27.7 mm, hub dia 38.1 mm drawn straight, length 14.2 mm from the raised face to the hub end | STEP · STL |
| flange-150-nps1-blind | Blind flange, NPS 1 Class 150: OD 107.9 mm, raised face dia 50.8 x 1.6 mm, bolt circle 79.4 mm, 4 holes dia 15.9 mm for 0.5 in bolts; thickness 14.3 mm including the raised face | STEP · STL |
| flange-150-nps1-slip-on | Slip-on flange, NPS 1 Class 150: OD 107.9 mm, raised face dia 50.8 x 1.6 mm, bolt circle 79.4 mm, 4 holes dia 15.9 mm for 0.5 in bolts; bore 34.5 mm, hub dia 49.2 mm drawn straight, length 15.7 mm from the raised face to the hub end | STEP · STL |
| flange-150-nps1p25-blind | Blind flange, NPS 1-1/4 Class 150: OD 117.5 mm, raised face dia 63.5 x 1.6 mm, bolt circle 88.9 mm, 4 holes dia 15.9 mm for 0.5 in bolts; thickness 15.9 mm including the raised face | STEP · STL |
| flange-150-nps1p25-slip-on | Slip-on flange, NPS 1-1/4 Class 150: OD 117.5 mm, raised face dia 63.5 x 1.6 mm, bolt circle 88.9 mm, 4 holes dia 15.9 mm for 0.5 in bolts; bore 43.2 mm, hub dia 58.7 mm drawn straight, length 19.0 mm from the raised face to the hub end | STEP · STL |
| flange-150-nps1p5-blind | Blind flange, NPS 1-1/2 Class 150: OD 127.0 mm, raised face dia 73.0 x 1.6 mm, bolt circle 98.4 mm, 4 holes dia 15.9 mm for 0.5 in bolts; thickness 17.5 mm including the raised face | STEP · STL |
| flange-150-nps1p5-slip-on | Slip-on flange, NPS 1-1/2 Class 150: OD 127.0 mm, raised face dia 73.0 x 1.6 mm, bolt circle 98.4 mm, 4 holes dia 15.9 mm for 0.5 in bolts; bore 49.5 mm, hub dia 65.1 mm drawn straight, length 20.6 mm from the raised face to the hub end | STEP · STL |
| flange-150-nps2-blind | Blind flange, NPS 2 Class 150: OD 152.4 mm, raised face dia 92.1 x 1.6 mm, bolt circle 120.6 mm, 4 holes dia 19.0 mm for 0.625 in bolts; thickness 19.0 mm including the raised face | STEP · STL |
| flange-150-nps2-slip-on | Slip-on flange, NPS 2 Class 150: OD 152.4 mm, raised face dia 92.1 x 1.6 mm, bolt circle 120.6 mm, 4 holes dia 19.0 mm for 0.625 in bolts; bore 62.0 mm, hub dia 77.8 mm drawn straight, length 23.9 mm from the raised face to the hub end | STEP · STL |
| flange-150-nps2p5-blind | Blind flange, NPS 2-1/2 Class 150: OD 177.8 mm, raised face dia 104.8 x 1.6 mm, bolt circle 139.7 mm, 4 holes dia 19.0 mm for 0.625 in bolts; thickness 22.2 mm including the raised face | STEP · STL |
| flange-150-nps2p5-slip-on | Slip-on flange, NPS 2-1/2 Class 150: OD 177.8 mm, raised face dia 104.8 x 1.6 mm, bolt circle 139.7 mm, 4 holes dia 19.0 mm for 0.625 in bolts; bore 74.7 mm, hub dia 90.5 mm drawn straight, length 26.9 mm from the raised face to the hub end | STEP · STL |
| flange-150-nps3-blind | Blind flange, NPS 3 Class 150: OD 190.5 mm, raised face dia 127.0 x 1.6 mm, bolt circle 152.4 mm, 4 holes dia 19.0 mm for 0.625 in bolts; thickness 23.8 mm including the raised face | STEP · STL |
| flange-150-nps3-slip-on | Slip-on flange, NPS 3 Class 150: OD 190.5 mm, raised face dia 127.0 x 1.6 mm, bolt circle 152.4 mm, 4 holes dia 19.0 mm for 0.625 in bolts; bore 90.7 mm, hub dia 107.9 mm drawn straight, length 28.4 mm from the raised face to the hub end | STEP · STL |
| flange-150-nps3p5-blind | Blind flange, NPS 3-1/2 Class 150: OD 215.9 mm, raised face dia 139.7 x 1.6 mm, bolt circle 177.8 mm, 8 holes dia 19.0 mm for 0.625 in bolts; thickness 23.8 mm including the raised face | STEP · STL |
| flange-150-nps3p5-slip-on | Slip-on flange, NPS 3-1/2 Class 150: OD 215.9 mm, raised face dia 139.7 x 1.6 mm, bolt circle 177.8 mm, 8 holes dia 19.0 mm for 0.625 in bolts; bore 103.4 mm, hub dia 122.2 mm drawn straight, length 30.2 mm from the raised face to the hub end | STEP · STL |
| flange-150-nps4-blind | Blind flange, NPS 4 Class 150: OD 228.6 mm, raised face dia 157.2 x 1.6 mm, bolt circle 190.5 mm, 8 holes dia 19.0 mm for 0.625 in bolts; thickness 23.8 mm including the raised face | STEP · STL |
| flange-150-nps4-slip-on | Slip-on flange, NPS 4 Class 150: OD 228.6 mm, raised face dia 157.2 x 1.6 mm, bolt circle 190.5 mm, 8 holes dia 19.0 mm for 0.625 in bolts; bore 116.1 mm, hub dia 134.9 mm drawn straight, length 31.8 mm from the raised face to the hub end | STEP · STL |
| flange-150-nps5-blind | Blind flange, NPS 5 Class 150: OD 254.0 mm, raised face dia 185.7 x 1.6 mm, bolt circle 215.9 mm, 8 holes dia 22.2 mm for 0.75 in bolts; thickness 23.8 mm including the raised face | STEP · STL |
| flange-150-nps5-slip-on | Slip-on flange, NPS 5 Class 150: OD 254.0 mm, raised face dia 185.7 x 1.6 mm, bolt circle 215.9 mm, 8 holes dia 22.2 mm for 0.75 in bolts; bore 143.8 mm, hub dia 163.5 mm drawn straight, length 35.1 mm from the raised face to the hub end | STEP · STL |
| flange-150-nps6-blind | Blind flange, NPS 6 Class 150: OD 279.4 mm, raised face dia 215.9 x 1.6 mm, bolt circle 241.3 mm, 8 holes dia 22.2 mm for 0.75 in bolts; thickness 25.4 mm including the raised face | STEP · STL |
| flange-150-nps6-slip-on | Slip-on flange, NPS 6 Class 150: OD 279.4 mm, raised face dia 215.9 x 1.6 mm, bolt circle 241.3 mm, 8 holes dia 22.2 mm for 0.75 in bolts; bore 170.7 mm, hub dia 192.1 mm drawn straight, length 38.1 mm from the raised face to the hub end | STEP · STL |
| flange-150-nps8-blind | Blind flange, NPS 8 Class 150: OD 342.9 mm, raised face dia 269.9 x 1.6 mm, bolt circle 298.4 mm, 8 holes dia 22.2 mm for 0.75 in bolts; thickness 28.6 mm including the raised face | STEP · STL |
| flange-150-nps8-slip-on | Slip-on flange, NPS 8 Class 150: OD 342.9 mm, raised face dia 269.9 x 1.6 mm, bolt circle 298.4 mm, 8 holes dia 22.2 mm for 0.75 in bolts; bore 221.5 mm, hub dia 246.1 mm drawn straight, length 42.9 mm from the raised face to the hub end | STEP · STL |
| flange-150-nps10-blind | Blind flange, NPS 10 Class 150: OD 406.4 mm, raised face dia 323.8 x 1.6 mm, bolt circle 361.9 mm, 12 holes dia 25.4 mm for 0.875 in bolts; thickness 30.2 mm including the raised face | STEP · STL |
| flange-150-nps10-slip-on | Slip-on flange, NPS 10 Class 150: OD 406.4 mm, raised face dia 323.8 x 1.6 mm, bolt circle 361.9 mm, 12 holes dia 25.4 mm for 0.875 in bolts; bore 276.4 mm, hub dia 304.8 mm drawn straight, length 47.8 mm from the raised face to the hub end | STEP · STL |
| flange-150-nps12-blind | Blind flange, NPS 12 Class 150: OD 482.6 mm, raised face dia 381.0 x 1.6 mm, bolt circle 431.8 mm, 12 holes dia 25.4 mm for 0.875 in bolts; thickness 31.8 mm including the raised face | STEP · STL |
| flange-150-nps12-slip-on | Slip-on flange, NPS 12 Class 150: OD 482.6 mm, raised face dia 381.0 x 1.6 mm, bolt circle 431.8 mm, 12 holes dia 25.4 mm for 0.875 in bolts; bore 327.2 mm, hub dia 365.1 mm drawn straight, length 53.8 mm from the raised face to the hub end | STEP · STL |
| flange-150-nps14-blind | Blind flange, NPS 14 Class 150: OD 533.4 mm, raised face dia 412.8 x 1.6 mm, bolt circle 476.2 mm, 12 holes dia 28.6 mm for 1 in bolts; thickness 34.9 mm including the raised face | STEP · STL |
| flange-150-nps14-slip-on | Slip-on flange, NPS 14 Class 150: OD 533.4 mm, raised face dia 412.8 x 1.6 mm, bolt circle 476.2 mm, 12 holes dia 28.6 mm for 1 in bolts; bore 359.2 mm, hub dia 400.0 mm drawn straight, length 55.6 mm from the raised face to the hub end | STEP · STL |
| flange-150-nps16-blind | Blind flange, NPS 16 Class 150: OD 596.9 mm, raised face dia 469.9 x 1.6 mm, bolt circle 539.8 mm, 16 holes dia 28.6 mm for 1 in bolts; thickness 36.5 mm including the raised face | STEP · STL |
| flange-150-nps16-slip-on | Slip-on flange, NPS 16 Class 150: OD 596.9 mm, raised face dia 469.9 x 1.6 mm, bolt circle 539.8 mm, 16 holes dia 28.6 mm for 1 in bolts; bore 410.5 mm, hub dia 457.2 mm drawn straight, length 62.0 mm from the raised face to the hub end | STEP · STL |
| flange-150-nps18-blind | Blind flange, NPS 18 Class 150: OD 635.0 mm, raised face dia 533.4 x 1.6 mm, bolt circle 577.9 mm, 16 holes dia 31.8 mm for 1.125 in bolts; thickness 39.7 mm including the raised face | STEP · STL |
| flange-150-nps18-slip-on | Slip-on flange, NPS 18 Class 150: OD 635.0 mm, raised face dia 533.4 x 1.6 mm, bolt circle 577.9 mm, 16 holes dia 31.8 mm for 1.125 in bolts; bore 461.8 mm, hub dia 504.8 mm drawn straight, length 66.5 mm from the raised face to the hub end | STEP · STL |
| flange-150-nps20-blind | Blind flange, NPS 20 Class 150: OD 698.5 mm, raised face dia 584.2 x 1.6 mm, bolt circle 635.0 mm, 20 holes dia 31.8 mm for 1.125 in bolts; thickness 42.9 mm including the raised face | STEP · STL |
| flange-150-nps20-slip-on | Slip-on flange, NPS 20 Class 150: OD 698.5 mm, raised face dia 584.2 x 1.6 mm, bolt circle 635.0 mm, 20 holes dia 31.8 mm for 1.125 in bolts; bore 513.1 mm, hub dia 558.8 mm drawn straight, length 71.4 mm from the raised face to the hub end | STEP · STL |
| flange-150-nps24-blind | Blind flange, NPS 24 Class 150: OD 812.8 mm, raised face dia 692.1 x 1.6 mm, bolt circle 749.3 mm, 20 holes dia 34.9 mm for 1.25 in bolts; thickness 47.6 mm including the raised face | STEP · STL |
| flange-150-nps24-slip-on | Slip-on flange, NPS 24 Class 150: OD 812.8 mm, raised face dia 692.1 x 1.6 mm, bolt circle 749.3 mm, 20 holes dia 34.9 mm for 1.25 in bolts; bore 615.9 mm, hub dia 663.6 mm drawn straight, length 81.0 mm from the raised face to the hub end | STEP · STL |
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Questions
What is the OD of a 2 inch Class 150 flange?
6.00 in (152.4 mm), with a 4-hole 4.750 in bolt circle.
What is the bolt circle of a 4 inch Class 150 flange?
7.500 in (190.5 mm), 8 holes of 0.75 in for 0.625 in bolts.
How high is the raised face on a Class 150 flange?
1/16 in (1.6 mm); it is included in the printed flange thickness.
Do slip-on, blind and weld-neck flanges share bolt patterns?
Yes: for the same NPS and class the OD, bolt circle and holes are the same; hub, bore and length differ.