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What is Class 900 Lap Joint Flange
Forged steel flange is a disc-shaped piece of equipment used to connect a pipe to fittings or valve or other component to form a pipework system. Usually flange has been attached to pipe or tube end to, and then a gasket is inserted in the middle to form a seal. Finally they are joined together with bolts and nuts.
Class 900 lap joint flange is a two-piece pipe flange connection that is easy to install and disassemble. What are the advantages of lap joint flanges? Lap joint flanges are cost-effective, can accommodate minor misalignments, and are well-suited for corrosive applications.
ASME B16.5 Standard of Flange
ASME B16.5 is the most common used standard specification for manufacturing cast and forged steel pipe flange. This standard included flanges and flanged fittings made from cast or forged materials, and blind flanges and certain reducing flanges made from cast, forged, or plate materials. Also included in this Standard are requirements and recommendations regarding flange bolting, flange gaskets, and flange joints.
Dimension of Class 900 Lap Joint Flange
| Pipe | Flange Data | Lap | Hub | Drilling Data | Weight | |||||||
| Nomi nal P i pe 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 | ||||
| 1/2 | 0.840 21.30 | 4.750 120.6 | 0.900 22.90 | 0.880 22.30 | 1.250 31.70 | 0.120 3.000 | 1.500 38.10 | 4 | 0.880 22.30 | 3.250 82.50 | 1.71 | |
| 3/4 | 1.050 26.70 | 5.120 130.0 | 1.110 28.20 | 1.000 25.40 | 1.380 35.00 | 0.120 3.000 | 1.750 44.40 | 4 | 0.880 22.30 | 3.500 88.90 | 2.30 | |
| 1 | 1.315 33.40 | 5.880 149.3 | 1.380 35.10 | 1.120 28.40 | 1.620 41.10 | 0.120 3.000 | 2.060 52.30 | 4 | 1.000 25.40 | 4.000 101.6 | 3.40 | |
| 11/4 | 1.660 42.20 | 6.250 158.7 | 1.720 43.70 | 1.120 28.40 | 1.620 41.10 | 0.190 4.800 | 2.500 63.50 | 4 | 1.000 25.40 | 4.380 111.2 | 3.85 | |
| 11/2 | 1.900 48.30 | 7.000 177.8 | 1.970 50.00 | 1.250 31.70 | 1.750 44.40 | 0.250 6.400 | 2.750 69.85 | 4 | 1.120 28.40 | 4.880 123.9 | 5.28 | |
| 2 | 2.375 60.30 | 8.500 215.9 | 2.460 62.50 | 1.500 38.10 | 2.250 57.15 | 0.310 7.900 | 4.120 104.6 | 8 | 1.000 25.40 | 6.500 165. 1 | 9.78 | |
| 21/2 | 2.875 73.00 | 9.620 244.3 | 2.970 75.40 | 1.620 41.10 | 2.500 63.50 | 0.310 7.900 | 4.880 123.9 | 8 | 1.120 28.40 | 7.500 190.5 | 13.6 | |
| 3 | 3.500 88.90 | 9.500 241.3 | 3.600 91.40 | 1.500 38.10 | 2. 120 53.80 | 0.380 9.700 | 5.000 127.0 | 8 | 1.000 25.40 | 7.500 190.5 | 11.3 | |
| 4 | 4.500 114.3 | 11.50 292.1 | 4.600 116.8 | 1.750 44.40 | 2.750 69.85 | 0.440 11.20 | 6.250 158.7 | 8 | 1.250 31.70 | 9.250 234.9 | 19.2 | |
| 5 | 5.563 141.3 | 13.75 349.2 | 5.690 114.5 | 2.000 50.80 | 3. 120 79.25 | 0.440 11.20 | 7.500 190.5 | 8 | 1.380 35.00 | 11.00 279.4 | 31.20 | |
| 6 | 6.625 168.3 | 15.00 381.0 | 6.750 171.5 | 2.190 55.60 | 3.380 85.80 | 0.500 12.70 | 9.250 234.9 | 12 | 1.250 31.70 | 12.50 317.5 | 40.50 | |
| 8 | 8.625 219.1 | 18.50 469.9 | 8.750 222.3 | 2.500 63.50 | 4.500 114.3 | 0.500 12.70 | 11.75 298.4 | 12 | 1.500 38.10 | 15.50 393.7 | 71.5 | |
| 10 | 10.75 273.0 | 21.50 546.1 | 10.92 277.4 | 2.750 69.85 | 5.000 127.0 | 0.500 12.70 | 14.50 368.3 | 16 | 1.500 38.10 | 18.50 469.9 | 104 | |
| 12 | 12.75 323.8 | 24.00 609.6 | 12.92 328.2 | 3.120 79.25 | 5.620 142.7 | 0.500 12.70 | 16.50 419.1 | 20 | 1.500 38.10 | 21.00 533.4 | 139 | |
| 14 | 14.00 355.6 | 25.25 641.3 | 14.18 360.2 | 3.380 85.80 | 6. 120 155.4 | 0.500 12.70 | 17.75 450.8 | 20 | 1.620 41.10 | 22.00 558.8 | 161 | |
| 16 | 16.00 406.4 | 27.75 704.8 | 16.19 411.2 | 3.500 88.90 | 6.500 165.1 | 0.500 12.70 | 20.00 508.0 | 20 | 1.750 44.40 | 24.25 615.9 | 194 | |
| 18 | 18.00 457.2 | 31.00 787.4 | 18.20 462.3 | 4.000 101.6 | 7.500 190.5 | 0.500 12.70 | 22.25 565.1 | 20 | 2.000 50.80 | 27.00 685.8 | 267 | |
| 20 | 20.00 508.0 | 33.75 857.2 | 20.25 514.4 | 4.250 107.9 | 8.250 209.5 | 0.500 12.70 | 24.50 622.3 | 20 | 2.120 53.80 | 29.50 749.3 | 334 | |
| 24 | 24.00 609.6 | 41.00 1041.4 | 24.25 616.0 | 50.50 139.7 | 10.50 266.7 | 0.500 12.70 | 29.50 749.3 | 20 | 2.620 66.55 | 35.50 901.7 | 618 | |
Weight List (KG)
Nominal Size | Lap Joint Flange | |
DN | NPS | 900# |
15 | 1/2 | 2.0 |
20 | 3/4 | 2.5 |
25 | 1 | 3.5 |
32 | 11/4 | 4.0 |
40 | 11/2 | 5.5 |
50 | 2 | 9 |
65 | 21/2 | 11 |
80 | 3 | 14 |
100 | 4 | 19 |
125 | 5 | 31 |
150 | 6 | 40 |
200 | 8 | 72 |
250 | 10 | 105 |
300 | 12 | 141 |
350 | 14 | 161 |
400 | 16 | 199 |
450 | 18 | 277 |
500 | 20 | 347 |
600 | 24 | 677 |
Materials of Class 900 Lap Joint Flange
Carbon steel | ASTM A105 |
Low temperature steel | ASTM A350 LF2/3 |
Pipeline steel | ASTM A694 F42/46/52/56/60/65/70 |
Alloy steel | ASTM A182 F5/9/11/12/22/91/92 |
Stainless Steel | ASTM A182 F304/316/317/310S/321/347/904L |
How to Install Lap Joint Flange
In order to assemble a lap joint ring flange and stub end, the stub end must slide into the bore of the flange ring and then be buttwelded to the pipe. One side of the stub end forms the sealing face, whilst the opposite/back side of the stub end presses against the lap joint flange ring (when the flange is assembled).
Applicaiton
Class 900 lap joint flanges are widely used in industries such as industrial plants, petrochemical facilities, water treatment plants, shipbuilding, and the oil and gas industry.
What is Class 900 Lap Joint Flange
Forged steel flange is a disc-shaped piece of equipment used to connect a pipe to fittings or valve or other component to form a pipework system. Usually flange has been attached to pipe or tube end to, and then a gasket is inserted in the middle to form a seal. Finally they are joined together with bolts and nuts.
Class 900 lap joint flange is a two-piece pipe flange connection that is easy to install and disassemble. What are the advantages of lap joint flanges? Lap joint flanges are cost-effective, can accommodate minor misalignments, and are well-suited for corrosive applications.
ASME B16.5 Standard of Flange
ASME B16.5 is the most common used standard specification for manufacturing cast and forged steel pipe flange. This standard included flanges and flanged fittings made from cast or forged materials, and blind flanges and certain reducing flanges made from cast, forged, or plate materials. Also included in this Standard are requirements and recommendations regarding flange bolting, flange gaskets, and flange joints.
Dimension of Class 900 Lap Joint Flange
| Pipe | Flange Data | Lap | Hub | Drilling Data | Weight | |||||||
| Nomi nal P i pe 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 | ||||
| 1/2 | 0.840 21.30 | 4.750 120.6 | 0.900 22.90 | 0.880 22.30 | 1.250 31.70 | 0.120 3.000 | 1.500 38.10 | 4 | 0.880 22.30 | 3.250 82.50 | 1.71 | |
| 3/4 | 1.050 26.70 | 5.120 130.0 | 1.110 28.20 | 1.000 25.40 | 1.380 35.00 | 0.120 3.000 | 1.750 44.40 | 4 | 0.880 22.30 | 3.500 88.90 | 2.30 | |
| 1 | 1.315 33.40 | 5.880 149.3 | 1.380 35.10 | 1.120 28.40 | 1.620 41.10 | 0.120 3.000 | 2.060 52.30 | 4 | 1.000 25.40 | 4.000 101.6 | 3.40 | |
| 11/4 | 1.660 42.20 | 6.250 158.7 | 1.720 43.70 | 1.120 28.40 | 1.620 41.10 | 0.190 4.800 | 2.500 63.50 | 4 | 1.000 25.40 | 4.380 111.2 | 3.85 | |
| 11/2 | 1.900 48.30 | 7.000 177.8 | 1.970 50.00 | 1.250 31.70 | 1.750 44.40 | 0.250 6.400 | 2.750 69.85 | 4 | 1.120 28.40 | 4.880 123.9 | 5.28 | |
| 2 | 2.375 60.30 | 8.500 215.9 | 2.460 62.50 | 1.500 38.10 | 2.250 57.15 | 0.310 7.900 | 4.120 104.6 | 8 | 1.000 25.40 | 6.500 165. 1 | 9.78 | |
| 21/2 | 2.875 73.00 | 9.620 244.3 | 2.970 75.40 | 1.620 41.10 | 2.500 63.50 | 0.310 7.900 | 4.880 123.9 | 8 | 1.120 28.40 | 7.500 190.5 | 13.6 | |
| 3 | 3.500 88.90 | 9.500 241.3 | 3.600 91.40 | 1.500 38.10 | 2. 120 53.80 | 0.380 9.700 | 5.000 127.0 | 8 | 1.000 25.40 | 7.500 190.5 | 11.3 | |
| 4 | 4.500 114.3 | 11.50 292.1 | 4.600 116.8 | 1.750 44.40 | 2.750 69.85 | 0.440 11.20 | 6.250 158.7 | 8 | 1.250 31.70 | 9.250 234.9 | 19.2 | |
| 5 | 5.563 141.3 | 13.75 349.2 | 5.690 114.5 | 2.000 50.80 | 3. 120 79.25 | 0.440 11.20 | 7.500 190.5 | 8 | 1.380 35.00 | 11.00 279.4 | 31.20 | |
| 6 | 6.625 168.3 | 15.00 381.0 | 6.750 171.5 | 2.190 55.60 | 3.380 85.80 | 0.500 12.70 | 9.250 234.9 | 12 | 1.250 31.70 | 12.50 317.5 | 40.50 | |
| 8 | 8.625 219.1 | 18.50 469.9 | 8.750 222.3 | 2.500 63.50 | 4.500 114.3 | 0.500 12.70 | 11.75 298.4 | 12 | 1.500 38.10 | 15.50 393.7 | 71.5 | |
| 10 | 10.75 273.0 | 21.50 546.1 | 10.92 277.4 | 2.750 69.85 | 5.000 127.0 | 0.500 12.70 | 14.50 368.3 | 16 | 1.500 38.10 | 18.50 469.9 | 104 | |
| 12 | 12.75 323.8 | 24.00 609.6 | 12.92 328.2 | 3.120 79.25 | 5.620 142.7 | 0.500 12.70 | 16.50 419.1 | 20 | 1.500 38.10 | 21.00 533.4 | 139 | |
| 14 | 14.00 355.6 | 25.25 641.3 | 14.18 360.2 | 3.380 85.80 | 6. 120 155.4 | 0.500 12.70 | 17.75 450.8 | 20 | 1.620 41.10 | 22.00 558.8 | 161 | |
| 16 | 16.00 406.4 | 27.75 704.8 | 16.19 411.2 | 3.500 88.90 | 6.500 165.1 | 0.500 12.70 | 20.00 508.0 | 20 | 1.750 44.40 | 24.25 615.9 | 194 | |
| 18 | 18.00 457.2 | 31.00 787.4 | 18.20 462.3 | 4.000 101.6 | 7.500 190.5 | 0.500 12.70 | 22.25 565.1 | 20 | 2.000 50.80 | 27.00 685.8 | 267 | |
| 20 | 20.00 508.0 | 33.75 857.2 | 20.25 514.4 | 4.250 107.9 | 8.250 209.5 | 0.500 12.70 | 24.50 622.3 | 20 | 2.120 53.80 | 29.50 749.3 | 334 | |
| 24 | 24.00 609.6 | 41.00 1041.4 | 24.25 616.0 | 50.50 139.7 | 10.50 266.7 | 0.500 12.70 | 29.50 749.3 | 20 | 2.620 66.55 | 35.50 901.7 | 618 | |
Weight List (KG)
Nominal Size | Lap Joint Flange | |
DN | NPS | 900# |
15 | 1/2 | 2.0 |
20 | 3/4 | 2.5 |
25 | 1 | 3.5 |
32 | 11/4 | 4.0 |
40 | 11/2 | 5.5 |
50 | 2 | 9 |
65 | 21/2 | 11 |
80 | 3 | 14 |
100 | 4 | 19 |
125 | 5 | 31 |
150 | 6 | 40 |
200 | 8 | 72 |
250 | 10 | 105 |
300 | 12 | 141 |
350 | 14 | 161 |
400 | 16 | 199 |
450 | 18 | 277 |
500 | 20 | 347 |
600 | 24 | 677 |
Materials of Class 900 Lap Joint Flange
Carbon steel | ASTM A105 |
Low temperature steel | ASTM A350 LF2/3 |
Pipeline steel | ASTM A694 F42/46/52/56/60/65/70 |
Alloy steel | ASTM A182 F5/9/11/12/22/91/92 |
Stainless Steel | ASTM A182 F304/316/317/310S/321/347/904L |
How to Install Lap Joint Flange
In order to assemble a lap joint ring flange and stub end, the stub end must slide into the bore of the flange ring and then be buttwelded to the pipe. One side of the stub end forms the sealing face, whilst the opposite/back side of the stub end presses against the lap joint flange ring (when the flange is assembled).
Applicaiton
Class 900 lap joint flanges are widely used in industries such as industrial plants, petrochemical facilities, water treatment plants, shipbuilding, and the oil and gas industry.
