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ASTM A182 F316 Lap Joint Flange

Stainless steel lap joint flange is a flange connection component, which consists of a flange, a flanged short section or a butt welding ring. Among them, the flange is made of stainless steel, which has good corrosion resistance, heat resistance and other properties.

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ASTM A182 F316 lap joint flange is a flange connection component, which consists of a flange, a flanged short section or a butt welding ring. Among them, the flange is made of stainless steel, which has good corrosion resistance, heat resistance and other properties. The meaning of lap joint is that its connection method is relatively flexible. For a lap joint flange with a neck, it has a short neck, one end of which is welded to the pipe, and the other end can be relatively freely matched with the flange. This structure allows the pipeline to have a certain expansion and contraction space when it expands and contracts or is subjected to a certain external force, reducing the stress concentration at the connection between the pipeline and the flange.

Compared with ordinary flanges, stainless steel lap joint flanges have certain advantages in installation and maintenance. During installation, due to its loose sleeve structure, it is easier to align the bolt holes, which facilitates the connection operation of the pipeline.

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
Low Temp Carbon Steel ASTM A350 LF2 / LF3
Pipeline Steel ASTM A694 F42 / 46 / 56 / 60 / 65
Alloy Steel ASTM A182 F11 / 12 / 5 / 9 / 91 / 92
Stainless Steel ASTM A182 F304/304L/304H, 316/316L, 310S, 317,347,904L
Duplex Stainless Steel ASTM A182 F51, F53, F44

Class 150 lb LAPJ Flange Dimensions & Weight

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

Food and beverage industry: Due to the high requirements for hygiene and corrosion resistance, loose flanges are widely used. For example, in the pipeline system of a milk processing plant, stainless steel loose flanges can connect different processing equipment and pipelines to ensure that milk will not be contaminated during processing and transportation, and can also adapt to pipeline cleaning and maintenance operations.
Chemical industry: There is a large amount of corrosive media transportation. The corrosion resistance of the loose flange can ensure the long-term stability of the pipeline connection. For example, in the pipeline of acidic media such as hydrochloric acid and sulfuric acid, stainless steel loose flanges can effectively prevent flange corrosion and avoid leakage accidents.
Pharmaceutical industry: The cleanliness of the production environment and the reliability of the equipment are extremely high. The hygiene and good connection performance of the loose flange make it an ideal choice for pipeline connection in pharmaceutical workshops. For example, in the pipeline system of a pharmaceutical synthesis workshop, it can connect reactors, filters and other equipment to ensure the safety and quality of the pharmaceutical production process.

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