ANSI/ ASME B16.5 class 2500 threaded 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.Threaded flange dimensions are covered in ANSI/ASME B16.5 class 2500 for size NPS ½” to 2½”.Threaded flange means the inner bore of a flange is thread,the shape of the threaded flange is like a slip on flange,so the threaded flange could be plate shape or with a hub for longer thread.
Dimensions of ANSI/ASME B16.5 class 2500 threaded flange:
ANSI ASME B16.5 class 2500 threaded flange dimensions
| Pipe | Flange Data | Hub | Raised Face | Drilling Data | Weight | |||||||
| Nominal Pipe Size | A | B | C | D | E | F | G | H | I | J | ||
| Outside Diameter | Overall Diameter | Counter-bore min | Flange Thickness min | Overall Length | Threaded length min | Hub Diameter | Face 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 |
in mm |
|||
| ½ | 0.840 21.30 | 5.250 133.4 | 0.930 23.60 | 1.190 30.20 | 1.560 39.60 | 1.120 28.40 | 1.690 42.90 | 1.380 35.10 | 4 | 0.880 22.40 | 3.500 88.90 | 2.95 |
| ¾ | 1.050 26.70 | 5.500 139.7 | 1.140 29.00 | 1.250 31.75 | 1.690 42.90 | 1.250 31.75 | 2.000 50.80 | 1.690 42.90 | 4 | 0.880 22.40 | 3.750 95.30 | 3.44 |
| 1 | 1.315 33.40 | 6.250 158.8 | 1.410 35.80 | 1.380 35.10 | 1.880 47.80 | 1.380 35.10 | 2.250 57.15 | 2.000 50.80 | 4 | 1.000 25.40 | 4.250 108.0 | 4.82 |
| 1¼ | 1.660 42.20 | 7.250 1.842 | 1.750 44.50 | 1.500 38.10 | 2.060 52.30 | 1.500 38.10 | 2.880 73.15 | 2.500 63.50 | 4 | 1.120 28.40 | 5.120 130.0 | 7.14 |
| 1½ | 1.900 48.30 | 8.000 203.2 | 1.990 50.50 | 1.750 44.50 | 2.380 60.45 | 1.750 44.50 | 3.120 79.25 | 2.880 73.15 | 4 | 1.250 31.75 | 5.750 146.1 | 10.0 |
| 2 | 2.375 60.30 | 9.250 235.0 | 2.500 63.50 | 2.000 50.80 | 2.750 69.85 | 2.000 50.80 | 3.750 95.30 | 3.620 91.90 | 8 | 1.120 28.40 | 6.750 171.5 | 14.8 |
| 2½ | 2.875 73.00 | 10.50 266.7 | 3.000 76.20 | 2.250 57.15 | 3.120 79.25 | 2.250 57.15 | 4.500 114.3 | 4.120 104.6 | 8 | 1.250 31.75 | 7.750 196.9 | 21.5 |
Notes:
- The thread conforms to ASME B1.20.1 NTP threads as described in Section 10.(The only exceptions are small male and female plain face threaded flanges which use NPSL locknut threads.)
- Class 300 and higher threaded flanges are counter-bored.Threads are chamfered to the counterbore at an angle of 45° (approx).
- 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:
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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. |
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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. |
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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. |
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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. |
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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. |
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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 400 threaded flange:
Carbon steel ANSI/ASME B16.5 threaded flange:
ASTM A105,A350 LF2,SS400,P235GH,P250GH,C22.8,Q235,20#,16Mn,etc.
Stainless steel ANSI/ASME B16.5 threaded flange:
ASTM A182 F304,F304L,F316,F316L,F321,F347,F310,F44,F51,etc.
Alloy steel ANSI/ASME B16.5 threaded 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 threaded flange
- ANSI/ASME B16.5 class 300 threaded flange
- ANSI/ASME B16.5 class 400 threaded flange
- ANSI/ASME B16.5 class 600 threaded flange
- ANSI/ASME B16.5 class 900 threaded flange
- ANSI/ASME B16.5 class 1500 threaded flange
- ANSI/ASME B16.5 class 2500 threaded flange
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