Flange Weight and Dimensions chart

Flanges are designed to withstand different levels of pressure and temperature, depending on the material and construction. For applications involving high-pressure or high-temperature fluids, flanges are fabricated from durable materials such as stainless steel, carbon steel, or alloy steel, ensuring structural integrity and reliability under demanding conditions.

When it comes to choosing the right flange for your piping system, understanding the weight and dimensions is crucial for ensuring proper fit and functionality. Below is a comprehensive chart detailing the weights and dimensions of various flange types commonly used in industrial applications:

Pipe Flange Weights by Pressure Class and Size Table

Flange Weights by Pressure Class and Size
Pipe Size 150 # 300 # 600 # 900 # 1500 # 2500 #
WN SO BLD WN SO BLD WN SO BLD WN SO BLD WN SO BLD WN SO BLD
1/2″ 2 1 1 2 1 1 2 2 2 SEE 1500 # WEIGHTS 5 4 4 7 7 7
3/4″ 2 2 2 3 3 3 4 3 3 SEE 1500 # WEIGHTS 6 5 6 8 8 8
1″ 3 2 2 4 3 3 4 4 4 SEE 1500 # WEIGHTS 9 8 8 12 11 11
1 1/2″ 4 3 3 7 6 6 8 7 8 SEE 1500 # WEIGHTS 13 12 13 25 22 23
2″ 6 5 5 9 7 8 12 9 10 SEE 1500 # WEIGHTS 25 25 25 42 37 39
2 1/2″ 8 7 7 12 10 12 18 13 15 SEE 1500 # WEIGHTS 36 36 35 52 55 56
3″ 10 8 9 15 13 16 23 16 20 31 26 29 48 48 48 94 83 86
4″ 15 13 17 25 22 27 42 37 41 53 53 54 73 73 73 145 125 130
5″ 19 15 20 32 28 35 68 63 68 86 83 87 130 130 140 245 210 225
6″ 24 19 26 42 39 50 81 80 86 110 110 115 165 165 160 380 325 345
8″ 39 30 45 67 58 81 120 115 140 175 170 200 275 260 300 580 485 530
10″ 52 43 70 91 81 124 190 170 230 260 245 290 455 435 510 1075 930 1025
12″ 80 64 110 140 115 185 225 200 295 325 325 415 690 580 690 1525 1100 1300
14″ 110 90 140 180 165 250 280 230 355 400 400 520 940 NA 975 NA NA NA
16″ 140 98 180 250 190 295 390 330 495 495 425 600 1250 NA 1300 NA NA NA
18″ 150 130 220 320 250 395 475 400 630 680 600 850 1625 NA 1750 NA NA NA
20″ 180 165 285 400 315 505 590 510 810 830 730 1075 2050 NA 2225 NA NA NA
22″ 225 185 355 465 370 640 720 590 1000 NA NA NA NA NA NA NA NA NA
24″ 260 220 430 580 475 790 830 730 1250 1500 1400 2025 3325 NA 3625 NA NA NA

Class 175 Slip On Flange and Blind Dimensions & Weights Chart

Thickness LTH
Nom Size OD Weld Neck Slip-On Blind OD of RF Dia at Base Slip-On Weld Neck Slip-On
O T T R X B L L
26 31.5 1.38 1.38 1.78 29 27.63 26.25 3.38 2.75
28 33.5 1.38 1.38 2 31 29.63 28.25 3.38 2.75
30 35.75 1.38 1.38 2.13 33.25 31.88 30.25 3.63 2.75
32 37.75 1.38 1.38 2.25 35.25 33.88 32.25 3.63 2.75
34 40.25 1.5 1.75 2.38 37.38 35.88 34.25 3.75 3.38
36 42.25 1.5 1.75 2.5 39.38 37.88 36.25 3.75 3.38
38 44.25 1.75 2 2.63 41.38 39.88 38.25 4.13 3.75
40 46.25 1.75 2 2.75 43.38 41.88 40.25 4.13 4
42 49 2 2.38 2.88 45.75 44.13 42.25 4.5 4.38
44 51 2 2.38 3 47.75 46.13 44.25 4.5 4.38
46 53 2 2.38 3.13 49.75 48.13 46.25 4.5 4.63
48 55 2.25 2.63 3.38 51.75 50.13 48.25 4.88 4.88
50 57 2.25 2.63 3.38 53.75 52.13 50.25 4.88 4.88
52 59.5 2.63 3 3.63 56 54.25 52.25 5.38 5.38
54 61.5 2.63 3 3.63 58 56.25 54.25 5.38 5.38
60 67.5 2.75 3.13 4 64 62.25 60.25 5.75 5.88
66 73.5 3.13 4 4.38 70 68.5 66.25 6.13 6.88
72 80 3.63 5 4.75 76.5 74.5 72.25 6.63 8
84 94 3 5 5.5 90.13 88 84.25 7 8.5
96 106 3.5 5 6.12 102.13 100 96.25 7.5 9

Class 350 Flanges Slip On, Weld Neck and Blind Flanges Chart

class 350 flanges slip on, weld neck and blind flanges chart
Thickness LTH
Nom Size OD Weld Neck Slip-On Blind OD of RF Dia at Base Slip-On Weld Neck Slip-On
O T T R X B L L
26 32.75 2.5 2.5 2.75 29.5 27.88 26.25 5 4.5
28 34.75 2.5 2.5 2.88 31 .50 29.88 28.25 5 4.5
30 37 2.63 2.63 3 33.75 32.13 30.25 5.25 4.75
32 39 2.75 2.75 3.25 35.75 34.13 32.25 5.5 5
34 41 2.88 2.88 3.38 37.75 36.13 34.25 5.75 5.13
36 43.75 3.13 3.13 3.63 40.25 38.5 36.25 6.13 5.63
38 45.75 3.13 3.13 3.75 42.25 40.5 38.25 6.13 5.63
40 47.75 3.25 3.25 4 44.25 42.5 40.25 6.25 5.88
42 50 3.5 3.5 4.13 46.5 44.75 42.25 6.5 6.13
44 52.75 3.75 3.75 4.38 48.88 46.75 44.25 6.75 6.75
46 54.75 4.25 4.25 4.75 50.88 48.75 46.25 7.25 7.25
48 56.75 4.25 4.25 4.75 52.88 50.75 48.25 7.25 7.25
52 61.5 4.25 57.25 55 52.25 7.5
54 63.5 4.5 4.75 59.25 57 54.25 7.75 8.25
60 69.5 4.5 5 65.25 63 60.25 8 8.5
66 77 4 72.38 70 66.25 8.5
72 83 4 78.38 76 72.25 9

Types of Flanges we supply

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