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SS Flange Weight Calculator


SS Flange Weight Calculator


Table of Content


fasteners types


Stainless Steel Flange Calculator


Flat Face Flange
Blind Flange
Weld Neck Flange

Flat Face Flange Weight Calculator

Weight of finished part: 0 kg

Blind Flange Weight Calculator

Weight of finished part: 0 kg

Weld Neck Flange Weight Calculator

Weight of finished part: 0 kg


Check Accurate Blind Flange Weight Chart & Calculator


Blind Flange Weight

Blind Flange Weight Chart


NPS in inch 1/2 3/4 1½ 2 1 1¼ 2½ 3½ 4 3 5 6 12 14 8 10 18 20 16 22 24
Class #150 0.9 0.9 1.8 2.3 0.9 1.4 3.2 5.9 7.7 4.1 9 12.2 55.4 63 21.2 31.5 99 128.3 81 159.8 193.5
Class #300 0.9 1.4 3.2 3.6 1.8 2.7 5.4 9.5 12.6 7.2 16.7 22.5 83.3 112.5 36.5 55.8 186.3 231.8 141.8 288 360
Class #400 0.9 1.4 3.6 4.5 1.8 2.7 6.8 13 14.9 9 19.8 27.5 101.7 139.5 45 69.8 225.9 279.5 179.1 324 421.2
Class #600 1.4 1.8 3.6 4.5 1.8 2.7 6.8 13 18.5 9 3 .6 38.7 132.8 17 .1 63 103 299.3 384.8 237.2 450 562.5

Weight Chart of Threaded flange


Threaded flange Weight

NPS ½ 1¼ 1½ ¾ 1 2 2½ 3 3½ 4 6 8 5 10 16 18 12 14 20 22 24
Class 300# 2 4.5 6.5 3 3 7 10 14 17 24 39 58 31 81 220 280 115 165 325 370 490
Class 150# 1 3 3 2 2 5 8 9 12 13 19 30 15 43 98 130 64 90 165 185 220
Class 400# 2 4.5 6.5 3 3.5 8 12 15 21 26 44 67 31 91 253 310 130 191 378 405 539
Class 600# 2 5 7 3 4 9 13 16 21 37 80 115 63 177 366 476 215 259 612 590 876
NPS ½ 1¼ 1½ ¾ 1 2 2½ 3 4 5 8 10 6 12 18 20 14 16 24    
Class 900# 6 10 14 6 7.5 22 31 36 53 83 172 245 110 326 647 792 400 459 1480    
Class 1500# 6 10 14 6 8 25 36 48 73 132 260 436 165 667 1625 2050 940 1250 2825    

Weld Neck Flange Weight Calculator is Easily Calculate the Weight of a Flange, Refer WNRF Weight Chart


WNRF Weight Chart


WNRF Flange Weight

NPS 1/2 1¼ 1½ 3/4 1 2 2½ 4 5 3 3½ 6 10 12 8 14 18 20 16 22 24
Class # 150 0.9 1.4 1.8 0.9 1.4 2.7 4.5 7.4 9.5 5.2 5.4 11.7 24.3 39.6 18.9 51.3 74.3 88.7 63 101.3 12 .6
Class # 400 1.4 2 3.6 1.6 1.8 4.5 6.3 15.8 19.4 8.1 11.7 25.7 56.3 78.8 4 .1 104.9 162 20 .3 132.8 227.3 288
Class # 300 0.9 2.3 3.2 1.4 1.8 4.1 5.4 11.9 16.2 8.1 9 2 .3 45 63.9 31.1 92.7 144 180 112.5 209.3 261
Class # 600 1.4 2.7 3.6 1.8 1.8 5.4 8.1 18.9 3 .6 1 .4 11.7 36.5 85.5 101.7 54 156.2 249.8 31 .5 216.5 324 439.7


Flange Bolt Length Calculator



Refer Round Pipes Tubes Weight Calculator & AWWA Flange Weight Chart


Round Pipes Tubes Weight Calculator



Find Flange Weight Calculation Formula & ASME B16.5 Flange Uses

Flange Weight Calculation Formula


V = Π X (OD² - ID²) / 4 X T

  • OD = Outer Diameter
  • ID = Inner Diameter
  • T = Thickness
  • V = Volume

Weight (W) = V X ρ

  • V = Volume
  • ρ = Density


ASME B16.5 Flange Uses


ASME B16.5 Flange Uses

Check Slip On Flange & Lap Joint Flange Weight Chart

Slip On Flange Weight Chart


Slip On Flange Weight

NPS ½ ¾ 1¼ 1½ 1 2 2½ 3½ 4 3 5 8 10 6 12 16 18 14 20 24 22
150# 1 2 3 3 2 5 8 11 13 9 15 30 43 19 64 140 160 105 195 275 245
600# 2 3 5 7 4 9 12 20 36 15 63 112 195 78 240 400 469 290 604 866 670
300# 2 3 4.5 6.5 3 7 10 17 24 14.5 28 58 91 39 140 234 305 190 375 550 435
400# 2 3 4.5 6.5 3.5 8 11 20 25 14 29 64 110 42 152 280 345 210 420 615 455
NPS ½ ¾ 1¼ 1½ 1 2 2½ 4 5 3 6 10 12 8 14 18 20 16 24    
1500# 6 6 10 14 8 25 35 75 140 47 170 485 749 286 890 1475 1775 1250 2825    
900# 6 6 10 14 7.5 21 25 51 81 29 105 277 371 190 415 670 868 488 1659    
NPS ½ ¾ 1¼ 1½ 1 2 2½ 4 5 3 6 10 12 8              
2500 lb 7 8 17 24 12 37 53 122 204 80 314 897 1262 471              

Lap Joint Flange Weight Chart


>Lap Joint Flange Weight

NPS ½ 1 1¼ ¾ 1½ 3 3½ 2 2½ 4 5 8 10 6 12 16 18 14 20 24 22
150# 1 2 3 2 3 9 11 5 8 13 15 30 43 19 64 140 160 105 195 275 245
400# 2 3.5 4.5 3 6.5 14 20 8 11 25 29 64 110 42 152 280 345 210 420 615 455
300# 2 3 4.5 3 6.5 14.5 17 7 10 24 28 58 91 39 140 234 305 190 375 550 435
600# 2 4 5 3 7 15 20 9 12 36 63 112 195 78 240 400 469 290 604 866 670
NPS ½ 1 1¼ ¾ 1½ 3 4 2 2½ 5 6 10 12 8 14 18 20 16 24    
1500# 6 8 10 6 14 47 75 25 35 140 170 485 749 286 890 1475 1775 1250 2825    
900# 6 7.5 10 6 14 29 51 21 25 81 105 277 371 190 415 670 868 488 1659    
NPS ½ 1 1¼ ¾ 1½ 3 4 2 2½ 5 6 10 12 8              
2500 lb 7 12 17 8 24 80 122 37 53 204 314 897 1262 471              

Flange Thickness Chart


NPS (Inches) 150 Class 900 Class 1500 Class 300 Class 600 Class 2500 Class
1/2 0.125 0.219 0.250 0.156 0.188 0.281
3/4 0.125 0.219 0.250 0.156 0.188 0.281
3 0.250 0.344 0.375 0.281 0.312 0.406
1 0.125 0.219 0.250 0.156 0.188 0.281
1 1/2 0.188 0.281 0.312 0.219 0.250 0.344
2 0.188 0.281 0.312 0.219 0.250 0.344
4 0.250 0.344 0.375 0.281 0.312 0.406
10 0.375 0.469 0.500 0.406 0.437 0.531
6 0.312 0.406 0.437 0.344 0.375 0.469
8 0.375 0.469 0.500 0.406 0.437 0.531
12 0.438 0.531 0.563 0.469 0.500 0.594
18 0.500 0.594 0.625 0.531 0.563 0.656
14 0.438 0.531 0.563 0.469 0.500 0.594
16 0.500 0.594 0.625 0.531 0.563 0.656
20 0.563 0.656 0.688 0.594 0.625 0.719
24 0.625 0.719 0.750 0.656 0.688 0.781

SS Flange Standards


Stainless Steel Flange Standards

  • ANSI B16.5
  • ASME B16.47 Series A & B
  • MSS-SP44
  • AWWA-C207
  • ASTM A182
  • ASME SA 182
Stainless Steel Flange Standards

Flange Torque Calculator



Weight Calculator