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A105 Lap Joint Flange

A105 Lap Joint flanges are made by using flanges, steel rings, etc. to put flanges on the pipe ends, and the flanges can move on the pipe ends. The function of the flange is to press them tightly. Because they are blocked by the flanges, the Lap Joint flanges do not contact the medium.

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A105 Lap Joint flanges are made by using flanges, steel rings, etc. to put flanges on the pipe ends, and the flanges can move on the pipe ends. The function of the flange is to press them tightly. Because they are blocked by the flanges, the Lap Joint flanges do not contact the medium.

Carbon steel Lap Joint flanges are widely used in many fields such as construction facilities, petrochemicals, thermal power plants, pharmaceutical industries, and shipbuilding. The pipelines and equipment in these fields often need to withstand different pressures, temperatures and media, and the diversity and adaptability of carbon steel Lap Joint flanges enable them to meet the connection requirements under these complex conditions.

Specification of Forged Steel Flanges

Size Range 1/2″ – 24” / DN15 – DN600
Pressure Rating Class 150, 300, 600, 900, 1500, 2500lb
Standard ASME B16.5, EN1092-1
Carbon Steel ASTM A105 / A105N

Class 150 lb Lap Joint Flange Flange Dimensions & Weight

微信图片_20220419174013

NPS A B C D R F H I J W
inch inch inch inch inch inch No. of

Holes

inch inch kg/pc
mm mm mm mm mm mm mm mm
1/2 3.500 0.900 0.440 0.620 0.120 1.190 4 0.620 2.380 0.38
88.90 22.90 11.20 15.70 3.000 30.20 15.70 60.45
3/4 3.880 1.110 0.500 0.620 0.120 1.500 4 0.620 2.750 0.55
98.60 28.20 12.70 15.70 3.000 38.10 15.70 69.85
1 4.250 1.380 0.560 0.690 0.120 1.940 4 0.620 3.120 0.76
108.0 35.10 14.20 17.50 3.000 49.30 15.70 79.25
1-1/4 4.620 1.720 0.620 0.810 0.190 2.310 4 0.620 3.500 1.01
117.3 43.70 15.70 20.60 4.800 58.70 15.70 88.90
1-1/2 5.000 1.970 0.690 0.880 0.250 2.560 4 0.620 3.880 1.30
127.0 50.00 17.50 22.40 6.400 65.00 15.70 98.60
2 6.000 2.460 0.750 1.000 0.310 3.060 4 0.750 4.750 2.03
152.4 62.5 19.10 25.40 7.900 77.70 19.10 120.7
2-1/2 7.000 2.970 0.880 1.120 0.310 3.560 4 0.750 5.500 3.25
177.8 75.40 22.40 28.40 7.900 90.40 19.10 139.7
3 7.500 3.600 0.940 1.190 0.380 4.250 4 0.750 6.000 3.81
190.5 91.40 23.90 30.20 9.700 108.0 19.10 152.4
3-1/2 8.500 4.100 0.940 1.250 0.380 4.810 8 0.750 7.000 4.76
215.9 104.1 23.90 31.75 9.700 122.2 19.10 177.8
4 9.000 4.600 0.940 1.310 0.440 5.310 8 0.750 7.500 5.25
228.6 116.8 23.90 33.30 11.20 134.9 19.10 190.5
5 10.00 5.690 0.940 1.440 0.440 6.440 8 0.880 8.500 6.02
254.0 114.5 23.90 36.60 11.20 163.6 22.40 215.9
6 11.00 6.750 1.000 1.560 0.500 7.560 8 0.880 9500 7.40
279.4 171.5 25.40 39.60 12.70 192.0 22.40 241.3
8 13.50 8.750 1.120 1.750 0.500 9.690 8 0.880 11.75 12.1
342.9 222.3 28.40 44.50 12.70 246.1 22.40 298.5
10 16.00 10.92 1.190 1.940 0.500 12.00 12 1.000 14.25 16.4
406.4 277.4 30.20 49.30 12.70 304.8 25.40 362.0
12 19.00 12.92 1.250 2.190 0.500 14.38 12 1.000 17.00 26.1
482.6 328.2 31.75 55.60 12.70 365.3 25.4 431.8
14 21.00 14.18 1.380 3.120 0.500 15.75 12 1.120 18.75 34.5
533.4 360.2 35.10 79.25 12.7 400.1 28.4 476.3
16 23.5 16.19 1.440 3.440 0.500 18.00 16 1.120 21.25 44.6
296.9 411.2 36.60 87.40 12.70 457.2 284 539.8
18 25.00 18.20 1.560 3.810 0.500 19.88 16 1.250 22.75 48.7
635.0 462.3 39.60 96.80 12.70 505.0 31.75 577.9
20 27.5 20.25 1.690 4.060 0.500 22.00 20 1.125 25.00 61.6
698.5 514.4 42.90 103.1 12.70 558.8 31.75 635
24 32.00 24.25 1.880 4.380 0.500 26.12 20 1.380 29.50 86.6
812.8 616.0 47.80 111.3 12.70 663.4 35.10 749.3

Application areas

Water Supply and Drainage System
In urban water supply and drainage pipeline projects, A105 lap joint  flanges can be used to connect pipes of different diameters. Since water supply and drainage pipelines may be affected by factors such as temperature changes and foundation settlement, the adaptability of loose flanges can ensure the stability and sealing of pipeline connections.
Chemical Pipeline System
Chemical pipelines often transport various corrosive, high-temperature, and high-pressure media. Although the flanged nipple may be made of corrosion-resistant materials, the main structure of the carbon steel lap joint  flange can withstand the pressure of the pipeline system. At the same time, its easy maintenance characteristics are also very important in the chemical environment, because the maintenance and overhaul of chemical pipelines are more frequent.
Building HVAC System
In the heating and ventilation pipeline system of the building, carbon steel lap joint  flanges can be used to connect various pipe fittings and equipment. It can adapt to the expansion and contraction of the pipeline caused by the temperature changes of the building in different seasons, and the cost is low, which meets the economic requirements of the construction project.

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