• Weights are in pounds and will vary by different wall thicknesses.
Flange Weights by Pressure Class and Size
Pipe Size150 #300 #600 #900 #1500 #2500 #
WNSOBLDWNSOBLDWNSOBLDWNSOBLDWNSOBLDWNSOBLD
1/2"211211222SEE 1500 # WEIGHTS544777
3/4"222333433SEE 1500 # WEIGHTS656888
1"322433444SEE 1500 # WEIGHTS988121111
1 1/2"433766878SEE 1500 # WEIGHTS131213252223
2"65597812910SEE 1500 # WEIGHTS252525423739
2 1/2"877121012181315SEE 1500 # WEIGHTS363635525556
3"1089151316231620312629484848948386
4"151317252227423741535354737373145125130
5"191520322835686368868387130130140245210225
6"241926423950818086110110115165165160380325345
8"393045675881120115140175170200275260300580485530
10"524370918112419017023026024529045543551010759301025
12"8064110140115185225200295325325415690580690152511001300
14"11090140180165250280230355400400520940NA975NANANA
16"140981802501902953903304954954256001250NA1300NANANA
18"1501302203202503954754006306806008501625NA1750NANANA
20"18016528540031550559051081083073010752050NA2225NANANA
22"2251853554653706407205901000NANANANANANANANANA
24"26022043058047579083073012501500140020253325NA3625NANANA

Conversion Data
• 1 inch = 25.44 mm• 1 mm = 0.03937 inches• 1 lb/ft^2 = 47.88 Pa• 1 psi = 6.8948 Pa• x°F = (5/9)(x-32)°C
• 1 pound = 0.45359 Kg• 1 Kg = 2.20462 pounds• 1 Pa = 0.020885 lb/ft^2• 1 Pa = 0.00014504 psi• x°C = (9/5)x + 32°F

DL Flange Bore Chart PDF Thumbnail

(View / Print PDF)