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ASME B16.47 Flanges Dimensions and Weights

The charts show the dimensions of ASME B16.47 large size flanges class 150, 300, 400, 600, 900 (from 26 to 60 inches in diameter).

ASME B16.47 SERIES A FLANGE DIMENSIONS

CLASS 150

Dimensions of ASME B16.47-A flanges class 150
All ASME B16.47 flanges dimensions are in inches

Flange NPSOutside
Diam.
Minimum ThicknessO.D. of
Raised
Face
Hub Diam.Length
Thru Hub
Approx. Weight (lbs)Drilling
Weld Neck FlangeBlind FlangeWeld Neck FlangeWeld Neck FlangeBlind FlangeNo. HolesDiam.
Holes
Bolt Circle
Diam.
2634.252.692.6929.5026.624.75300702241.3831.75
2836.502.812.8131.5028.624.94345833281.3834
3038.752.942.9433.7530.755.38400982281.3836
3241.753.193.193632.755.695051238281.6238.50
3443.753.253.253834.755.885401384321.6240.50
36463.563.5640.2536.756.196401676321.6242.75
3848.753.443.4442.25396.197201819321.6245.25
4050.753.563.5644.25416.447752040361.6247.25
42533.813.8147436.758902380361.6249.50
4455.2544494579902715401.6251.75
4657.254.064.065147.127.3110602961401.6253.75
4859.504.254.2553.5049.127.5611853350441.6256
5061.754.384.3855.5051.2581273716441.8858.25
52644.564.5657.5053.258.2514104156441.8860.25
5466.254.754.7559.5055.258.5015854636441.8862.75
5668.754.884.886257.38917605130481.8865
58715.065.066459.389.2519155675481.8867.25
60735.195.196661.389.4423536155521.8869.25

CLASS 300

Dimensions of ASME B16.47-A flanges class 300
All ASME B16.47 flanges dimensions are in inches

Flange NPSOutside
Diam.
Minimum ThicknessO.D. of
Raised
Face
Hub Diam.Length
Thru Hub
Approx. Weight (lbs)Drilling
Weld Neck FlangeBlind FlangeWeld Neck FlangeWeld Neck FlangeBlind FlangeNo. HolesDiam.
Holes
Bolt Circle
Diam.
2638.253.123.3129.5028.387.256051079281.7534.50
2840.753.383.5631.5030.507.757451315281.7537
30433.623.7533.7532.568.258701545281.8839.25
3245.253.883.943634.698.751005179528241.50
3447.5044.123836.889.121145206828243.50
36504.124.3840.25399.5012752435322.1246
38464.254.2540.5039.127.126952001321.6243
4048.754.504.5042.7541.127.628402380321.7545.50
4250.754.694.6944.7543.257.889502689321.7547.50
4453.254.884.884745.258.1210553079321.8849.75
4655.755.065.064947.388.501235350028252
4857.755.255.2551.2549.388.811380389632254
5060.255.505.5053.5051.389.1215304442322.1256.25
5262.255.695.6955.5053.389.3816604906322.1256.25
5465.256657.7555.509.9420505684282.3861
5667.256.066.0659.7557.6210.2521556099282.3863
5869.256.256.256259.6210.5022706669322.3865
6071.256.446.446461.6210.7524707274322.3867

CLASS 400

Dimensions of ASME B16.47-A flanges class 400
All ASME B16.47 flanges dimensions are in inches

Flange NPSOutside
Diam.
Minimum ThicknessO.D. of
Raised
Face
Hub Diam.Length
Thru Hub
Approx. Weight (lbs)Drilling
Weld Neck FlangeBlind FlangeWeld Neck FlangeWeld Neck FlangeBlind FlangeNo. HolesDiam.
Holes
Bolt Circle
Diam.
2638.253.503.8829.5028.627.626501263281.8834.50
2840.753.754.1231.5030.818.12785152028237
304344.3833.7532.948.629051802282.6239.25
3245.254.254.5636359.1210652075282.6241.25
3447.504.384.813837.819.5012002415282.6243.50
36504.505.0640.2539.389.8813402815322.6246
3847.504.884.8840.7539.508.129352450321.8844
40505.125.124341.508.501090285032246.25
42525.255.254543.628.811190316032248.25
4454.505.505.5047.2543.629.1813753635322.6250.50
4656.755.755.7549.5047.759.6215254120362.6252.75
4859.5066.0051.5049.8810.1217904725282.3855.25
5061.756.196.2553.625210.5619505303322.3857.50
5263.756.386.4455.625410.8821255823322.3859.50
54676.696.7557.8856.1211.3825656742282.6262.25
56696.886.9460.1258.2511.7527107352322.6264.25
587177.1262.1260.2512.0632307986322.6266.25
6074.257.317.4464.3862.3812.5638209126322.8869

CLASS 600

Dimensions of ASME B16.47-A flanges class 600
All ASME B16.47 flanges dimensions are in inches

Flange NPSOutside
Diam.
Minimum ThicknessO.D. of
Raised
Face
Hub Diam.Length
Thru Hub
Approx. Weight (lbs)Drilling
Weld Neck FlangeBlind FlangeWeld Neck FlangeWeld Neck FlangeBlind FlangeNo. HolesDiam.
Holes
Bolt Circle
Diam.
26404.254.9429.5029.448.75940176028236
2842.254.385.1931.5031.629.251602061282.1238
3044.504.505.5033.7533.949.7512102423282.1240.25
32474.635.813636.1510.2513752858282.3842.50
34494.756.063838.3110.6215403237282.3844.50
3651.754.886.3840.2540.6211.1217053800282.6247
385066.1241.5040.251014703405282.3845.75
40526.256.3843.7542.2510.3816303838322.3847.75
4255.256.636.754644.381120304585282.6250.50
4457.256.81748.2546.5011.3821605105322.6252.50
4659.507.067.3150.2548.6211.8124105758322.6254.75
4862.757.447.6952.5050.7512.4428556737322.8857.50
5065.757.75854.5052.8812.9433307695283.1260
5267.7588.2556.5054.8813.2535608425323.1262
54708.258.5658.755713.7539209333323.1264.25
56738.568.8860.7559.1214.25428010530323.3866.75
58758.759.126361.1214.56464011414323.3868.75
6078.509.199.5665.2563.3815.31500013108283.6271.75

CLASS 900

Dimensions of ASME B16.47-A flanges class 900
All ASME B16.47 flanges dimensions are in inches

Flange NPSOutside
Diam.
Minimum ThicknessO.D. of
Raised
Face
Hub Diam.Length
Thru Hub
Approx. Weight (lbs)Drilling
Weld Neck FlangeBlind FlangeWeld Neck FlangeWeld Neck FlangeBlind FlangeNo. HolesDiam.
Holes
Bolt Circle
Diam.
2642.755.506.3129.5030.5011.2515252566202.8837.50
28465.626.7531.5032.7511.7518103178203.1240.25
3048.505.887.1833.753512.2521203759203.1242.75
3251.756.257.623637.251325454541203.3845.50
34556.508.063839.6213.7529705425203.6248.25
3657.506.758.4440.2541.8814.2533956210203.6250.75
3857.507.508.5043.2542.2513.8833856253203.6250.75
4059.507.758.8145.7544.3814.3136206940243.6252.75
4261.508.129.1247.7546.3114.6239607675243.6254.75
4464.888.449.565048.6215.3843008955243.8857.62
4668.258.8810.8852.5050.8816.18464010426244.1260.50
4870.259.1910.8854.5052.8816.50498011398244.1260.50

ASME B16.47 SERIES B FLANGE DIMENSIONS

CLASS 75

Dimensions of ASME B16.47-B flanges class 75
All ASME B16.47 flanges dimensions are in inches

Flange NPSOutside
Diam.
Minimum ThicknessO.D. of
Raised
Face
Hub Diam.Length
Thru Hub
Approx. Weight (lbs)Drilling
Weld Neck FlangeBlindWeld Neck FlangeWeld Neck FlangeBlind FlangeNo. HolesDiam.
Holes
Bolt Circle
Diam.
26301.251.2527.7526.632.2580255360.7528.50
28321.251.2529.7528.632.3885290400.7530.50
30341.251.2531.7530.632.5090330440.7532.50
32361.321.3833.7532.632.69105390480.7534.50
34381.321.4435.7534.632.82110430520.7536.50
3640.691.381.613836.813.3214558400.7539.06
3842.691.441.694038.813.44160595400.8841.06
4044.691.441.694240.813.57170760440.8843.06
4216.691.501.824442.813.69185895480.8845.06
4449.251.631.8846.2544.884.07230106536147.38
4651.251.691.9448.2546.884.19245118540149.38
4853.251.752.0750.2548.884.32270131544151.38
5055.251.822.1352.2550.944.50290150544153.38
5257.381.822.1954.2552.944.69310166548155.50
5459.381.882.3156.25554.88340184048157.50
56621.942.3858.5057.135.254002110401.1259.88
586422.4460.5059.135.384302300441.1261.88
60662.132.5662.5061.135.634752500441.1263.88

CLASS 150

Dimensions of ASME B16.47-B flanges class 150
All ASME B16.47 flanges dimensions are in inches

Flange NPSOutside
Diam.
Minimum ThicknessO.D.
of
Raised
Face
Hub Diam.Length
Thru Hub
Approx. Weight (lbs)Drilling
Weld Neck FlangeBlindWeld Neck FlangeWeld Neck FlangeBlind FlangeNo. HolesDiam.
Holes
Bolt
Circle Diam.
2630.941.571.692826.943.44120375360.8829.31
2832.941.691.823028.943.69140455400.8831.31
3034.941.691.9432313.88150545440.8833.31
3237.061.752.073433.064.19170648480.8835.44
3439.561.882.1336.2535.124.2821078240137.69
3641.6222.2538.2537.194.5724089044139.75
3844.252.072.4440.2539.254.822901090401.1242.12
4046.252.132.5742.5041.3153101247441.1244.12
4248.252.252.6344.5043.385.193451393481.1246.12
4450.252.322.7546.5045.385.323101579521.1248.12
4652.812.382.8848.6247.445.634351825401.2550.56
4854.812.50350.7548.505.824802045441.2552.56
5056.812.633.1352.7551.5065202284481.2554.56
5258.812.693.2554.7553.566.135202547521.2556.56
54612.753.3856.7555.626.326202848561.2558.75
56632.823.5058.7557.696.506503145601.2560.75
5865.942.883.6260.7559.696.827803560481.3863.44
6067.942.943.756361.8178503913521.3865.44

CLASS 300

Dimensions of ASME B16.47-B flanges class 300
All ASME B16.47 flanges dimensions are in inches

Flange NPSOutside
Diam.
Minimum ThicknessO.D.
of
Raised
Face
Hub Diam.Length
Thru Hub
Approx. Weight (lbs)Drilling
Weld Neck FlangeBlindWeld Neck FlangeWeld Neck FlangeBlind FlangeNo. HolesDiam.
Holes
Bolt
Circle Diam.
2634.123.443.442926.195.63400905321.3831.62
2836.253.443.443128.195.814501023361.3833.75
30393.633.6333.2530.256.165501250361.5036.25
3241.504435.5032.256.566851556321.6238.50
3443.624437.5034.256.757501719361.6240.62
3646.124439.7536.257.068401920321.7542.88
3848.124.314.3141.7538.257.509152257361.7544.88
4050.124.504.5043.8840.257.759902550401.7546.88
4252.504.634.634642.31811352875361.8849
4454.504.944.944844.318.3812353305401.8851
4657.5055.065046.318.691470376636253.75
4859.5055.2552.2548.318.751575418340255.75
5061.505.385.4454.2550.319.191710462944257.75
5263.505.565.6156.2552.319.501840509648259.75
5465.885.325.8158.2554.319.381980567948262.12
5669.5066.1260.5056.3110.5022956642362.3865
5871.9466.3162.7558.3110.7527707347402.3867.44
6073.945.886.506560.3110.6328707980402.3869.44

CLASS 400

Dimensions of ASME B16.47-B flanges class 400
All ASME B16.47 flanges dimensions are in inches

Flange NPSOutside
Diam.
Minimum ThicknessO.D.
of
Raised
Face
Hub Diam.Length
Thru Hub
Approx. Weight (lbs)Drilling
Weld Neck FlangeBlindWeld Neck FlangeWeld Neck FlangeBlind FlangeNo. HolesDiam.
Holes
Bolt Circle
Diam.
2633.503.503.502827.125.88360875281.5030.75
28363.753.753029.126.254501081241.6233
3038.254432.2531.256.695301302281.6235.25
3240.754.254.2534.3833.257.066351570281.7537.50
3442.754.384.3836.5035.387.386901780321.7539.50
3645.504.694.6938.6237.507.888552160281.8842

CLASS 600

Dimensions of ASME B16.47-B flanges class 600
All ASME B16.47 flanges dimensions are in inches

Flange NPSOutside
Diam.
Minimum ThicknessO.D. of
Raised
Face
Hub Diam.Length
Thru Hub
Approx. Weight (lbs)Drilling
Weld Neck FlangeBlindWeld Neck FlangeWeld Neck FlangeBlind FlangeNo. HolesDiam.
Holes
Bolt Circle
Diam.
26354.384.3828.6227.507.125501195281.7531.75
2837.504.564.5630.8829.627.506501427281.8834
3040.254.94533.1231.758.062810180028236.50
3242.755.125.3135.2533.888.509502160282.1238.75
3445.755.565.6837.50369.1912052645242.3841.50
3647.755.755.9439.7538.129.5613403013282.3843.50

CLASS 900

Dimensions of ASME B16.47-B flanges class 900
All ASME B16.47 flanges dimensions are in inches

Flange NPSOutside
Diam.
Minimum ThicknessO.D. of
Raised
Face
Hub
Diam.
Length
Thru Hub
Approx. Weight (lbs)Drilling
Weld Neck FlangeBlindWeld Neck FlangeWeld Neck FlangeBlind FlangeNo. HolesDiam.
Holes
Bolt Circle
Diam.
2640.255.316.063029.2510.1910502185202.6335.50
2843.505.816.5632.2531.3810.8815202762202.8838.25
3046.506.126.9334.5033.5011.3818203334203.1340.75
3248.756.317.3136.5035.7511.9420653865203.1343
3451.756.757.683937.8812.5624504575203.3845.50
36536.817.9440.504012.8125204963243.1347.25

TOLERANCES OF ASME B16.47 FLANGES

±1.2mmDiamet

OD±0.12″±3.2mm
The diameter of Flange Face0.06″ (1.66mm) raised face±0.08″±2.0mm
0.25″ (6.44mm) raised face±0.04″
er ofThe diameter of the Hub at the Point of Welding±0.21″, -0.06″±5.5mm, -1.6mm
ID±0.12″, -0.06″±3.2mm, -1.6mm
Thk.Up to 1.0″ Thickness±0.12″, -0.00″±3.2mm, -0.00mm
1.0″ to 2.0″±0.19″, -0.00″±4.8mm, -0.00mm
2.0″ to 3.0″±0.31″, -0.00″±7.9mm, -0.00mm
Over 3.0′ Thickness±0.38″, -0.00″±9.6mm, -0.00mm
Bolts DrillingBolt Circle Diameter±0.06″±1.6mm
Bolt Hole Spacing±0.03″±0.8mm
The eccentricity of the Bolt Circle and Facing vs.  Bore±0.06″±1.6mm
Length Through Hub for Welding Neck Flanges±0.19″±4.8mm

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