ANSI/ASME B16.5 class 150 lap joint flange
ANSI/ASME B16.5 standard covers pressure,temperature,ratings,materials,dimensions,tolerances,marking, testing,and methods of designating openings for pipe flanges and flanged fittings.Lap joint flange dimensions are covered in ANSI/ASME B16.5 class 150 for size NPS ½” to 24″.
A lap joint flange(loose flange) consist two parts,the backing flange and the stud end,the stub end will be butt welded to the pipe,and the lap joint flange will be slip around the stub end.The lap joint flange is not connected to the pipe and stub end directly,so it could be rotated,it is convenient to install the flange connection if there is some misalignment between the bolt holes.
Dimensions of ANSI/ASME B16.5 class 150 lap joint flange:
ANSI ASME B16.5 Class 150 Lap Joint Flange Dimensions
| Pipe | Flange Data | Lap | Hub | Drilling Data | Weight | ||||||
| Nominal Pipe Size
|
A | B | C | D | R | F | H | I | J | ||
| Outside Diameter | Overall Diameter | Inside Diameter | Flange Thickness min | Overall Length | Lap Radius | Hub Diameter | Number of Holes | Bolt Hole Diameter | Diameter of Circle of Holes | kg/piece | |
| in mm |
in mm |
in mm |
in mm |
in mm |
in mm |
in mm |
in mm |
in mm |
|||
| ½ | 0.840 21.30 | 3.500 88.90 | 0.900 22.90 | 0.440 11.20 | 0.620 15.70 | 0.120 3.000 | 1.190 30.20 | 4 | 0.620 15.70 | 2.380 60.45 | 0.38 |
| ¾ | 1.050 26.70 | 3.880 98.60 | 1.110 28.20 | 0.500 12.70 | 0.620 15.70 | 0.120 3.000 | 1.500 38.10 | 4 | 0.620 15.70 | 2.750 69.85 | 0.55 |
| 1 | 1.315 33.40 | 4.250 108.0 | 1.380 35.10 | 0.560 14.20 | 0.690 17.50 | 0.120 3.000 | 1.940 49.30 | 4 | 0.620 15.70 | 3.120 79.25 | 0.76 |
| 1¼ | 1.660 42.20 | 4.620 117.3 | 1.720 43.70 | 0.620 15.70 | 0.810 20.60 | 0.190 4.800 | 2.310 58.70 | 4 | 0.620 15.70 | 3.500 88.90 | 1.01 |
| 1½ | 1.900 48.30 | 5.000 127.0 | 1.970 50.00 | 0.690 17.50 | 0.880 22.40 | 0.250 6.400 | 2.560 65.00 | 4 | 0.620 15.70 | 3.880 98.60 | 1.30 |
| 2 | 2.375 60.30 | 6.000 152.4 | 2.460 62.50 | 0.750 19.10 | 1.000 25.40 | 0.310 7.900 | 3.060 77.70 | 4 | 0.750 19.10 | 4.750 120.7 | 2.03 |
| 2½ | 2.875 73.00 | 7.000 177.8 | 2.970 75.40 | 0.880 22.40 | 1.120 28.40 | 0.310 7.900 | 3.560 90.40 | 4 | 0.750 19.10 | 5.500 139.7 | 3.25 |
| 3 | 3.500 88.90 | 7.500 190.5 | 3.600 91.40 | 0.940 23.90 | 1.190 30.20 | 0.380 9.700 | 4.250 108.0 | 4 | 0.750 19.10 | 6.000 152.4 | 3.81 |
| 3½ | 4.000 101.6 | 8.500 215.9 | 4.100 104.1 | 0.940 23.90 | 1.250 31.75 | 0.380 9.700 | 4.810 122.2 | 8 | 0.750 19.10 | 7.000 177.8 | 4.76 |
| 4 | 4.500 114.3 | 9.000 228.6 | 4.600 116.8 | 0.940 23.90 | 1.310 33.30 | 0.440 11.20 | 5.310 134.9 | 8 | 0.750 19.10 | 7.500 190.5 | 5.25 |
| 5 | 5.563 141.3 | 10.00 254.0 | 5.690 114.5 | 0.940 23.90 | 1.440 36.60 | 0.440 11.20 | 6.440 163.6 | 8 | 0.880 22.40 | 8.500 215.9 | 6.02 |
| 6 | 6.625 168.3 | 11.00 279.4 | 6.750 171.5 | 1.000 25.40 | 1.560 39.60 | 0.500 12.70 | 7.560 192.0 | 8 | 0.880 22.40 | 9.500 241.3 | 7.40 |
| 8 | 8.625 219.1 | 13.50 342.9 | 8.750 222.3 | 1.120 28.40 | 1.750 44.50 | 0.500 12.70 | 9.690 246.1 | 8 | 0.880 22.40 | 11.75 298.5 | 12.1 |
| 10 | 10.75 273.0 | 16.00 406.4 | 10.92 277.4 | 1.190 30.20 | 1.940 49.30 | 0.500 12.70 | 12.00 304.8 | 12 | 1.000 25.40 | 14.25 362.0 | 16.4 |
| 12 | 12.75 323.8 | 19.00 482.6 | 12.92 328.2 | 1.250 31.75 | 2.190 55.60 | 0.500 12.70 | 14.38 365.3 | 12 | 1.000 25.40 | 17.00 431.8 | 26.1 |
| 14 | 14.00 355.6 | 21.00 533.4 | 14.18 360.2 | 1.380 35.10 | 3.120 79.25 | 0.500 12.70 | 15.75 400.1 | 12 | 1.120 28.40 | 18.75 476.3 | 34.5 |
| 16 | 16.00 406.4 | 23.50 596.9 | 16.19 411.2 | 1.440 36.60 | 3.440 87.40 | 0.500 12.70 | 18.00 457.2 | 16 | 1.120 28.40 | 21.25 539.8 | 44.6 |
| 18 | 18.00 457.2 | 25.00 635.0 | 18.20 462.3 | 1.560 39.60 | 3.810 96.80 | 0.500 12.70 | 19.88 505.0 | 16 | 1.250 31.75 | 22.75 577.9 | 48.7 |
| 20 | 20.00 508.0 | 27.50 698.5 | 20.25 514.4 | 1.690 42.90 | 4.060 103.1 | 0.500 12.70 | 22.00 558.8 | 20 | 1.250 31.75 | 25.00 635.0 | 61.6 |
| 24 | 24.00 609.6 | 32.00 812.8 | 24.25 616.0 | 1.880 47.80 | 4.380 111.3 | 0.500 12.70 | 26.12 663.4 | 20 | 1.380 35.10 | 29.50 749.3 | 86.6 |
Notes: Weights are based on manufacturer’s data and are approximate.
Specifications of ANSI/ASME B16.5 flange:
Types of ANSI/ASME B16.5 forged flanges:
 ANSI ASME B16.5 weld neck flange drawing |
Weld neck flange(WN flange) is circumferentially welded into the system at its neck which means that the integrity of the butt welded area can be easily examined by radiography.The bores of both pipe and flange match,which reduces turbulence and erosion inside the pipeline.The weld neck is therefore favoured in critical applications. |
 ANSI ASME B16.5 blind flange drawing |
Blind flange is used to blank off pipelines,valves and pumps,it can also be used as an inspection cover.It is sometimes referred to as a blank flange. |
 ANSI ASME B16.5 slip on flange drawing |
Slip on flange(SO flange) is slipped over the pipe and then fillet welded.Slip-on flanges are easy to use in fabricated applications. |
 ANSI ASME B16.5 lap joint flange drawing |
Lap joint flange(LJ flange) is always used with either a stub end or taft which is butt welded to the pipe with the flange loose behind it.This means the stub end or taft always makes the face.The lap joint is favoured in low pressure applications because it is easily assembled and aligned.To reduce cost these flanges can be supplied without a hub and/or in treated,coated carbon steel. |
 ANSI ASME B16.5 socket weld flange drawing |
Socket weld flange(SW flange) is counter bored to accept the pipe before being fillet welded.The bore of the pipe and flange are both the same therefore giving good flow characteristics. |
 ANSI ASME B16.5 threaded flange drawing |
Threaded flange is referred to as either threaded or screwed.It is used to connect other threaded components in low pressure,non-critical applications.No welding is required. |
 ANSI ASME B16.5 ring type joint flange drawing |
Ring type joint is a method of ensuring leak proof flange connection at high pressures.A metal ring is compressed into a hexagonal groove on the face of the flange to make the seal.This jointing method can be employed on weld neck flanges,slip on flange and blind flanges. |
Materials of ANSI/ASME B16.5 class 150 lap joint flange:
Carbon steel ANSI/ASME B16.5 lap joint flange:
ASTM A105,A350 LF2,SS400,P235GH,P250GH,C22.8,Q235,20#,16Mn,etc.
Stainless steel ANSI/ASME B16.5 lap joint flange:
ASTM A182 F304,F304L,F316,F316L,F321,F347,F310,F44,F51,etc.
Alloy steel ANSI/ASME B16.5 lap joint flange:
ASTM A694 F42,F46,F52,F56,F60,F65,F70,A182 F5,F9,F91,F12,F11,F22,etc.
Related:
- ANSI/ASME B16.5 class 150 lap joint flange
- ANSI/ASME B16.5 class 300 lap joint flange
- ANSI/ASME B16.5 class 400 lap joint flange
- ANSI/ASME B16.5 class 600 lap joint flange
- ANSI/ASME B16.5 class 900 lap joint flange
- ANSI/ASME B16.5 class 1500 lap joint flange
- ANSI/ASME B16.5 class 2500 lap joint flange
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