Summary

Nominal Pipe Size (NPS) is a defined set of standard pipe sizes commonly used for process piping. NPS piping is defined in terms of a nominal diameter and wall thickness (defined by the pipe schedule). This article provides characteristics for NPS piping in Imperial units.

Definitions

\(OD\):Outer diameter (in)
\(ID\):Inner diameter (in)
\(WT\):Wall thickness (in)
\(ICSA\):Inner cross sectional area (in2)
\(ECSA\):External cross sectional area (in2)


NPS Pipe Characteristics in Imperial Units

The characteristics of NPS piping in Imperial units are listed in the tables below. For the following tables in metric units please refer to here

NPSDNSchODWTIDICSAECSAWeight
(in)(mm)-(in)(in)(in)(in2)(in2)(lb/f)
1/8650.4050.0350.3350.090.130.138
100.4050.0490.3070.070.130.186
300.4050.0570.2910.070.130.212
400.4050.0680.2690.060.130.245
800.4050.0950.2150.040.130.314
STD0.4050.0680.2690.060.130.245
XS0.4050.0950.2150.040.130.314
10S0.4050.0490.3070.070.130.186
40S0.4050.0680.2690.060.130.245
80S0.4050.0950.2150.040.130.314
1/4850.540.0490.4420.150.230.257
100.540.0650.410.130.230.33
300.540.0730.3940.120.230.364
400.540.0880.3640.10.230.425
800.540.1190.3020.070.230.535
STD0.540.0880.3640.10.230.425
XS0.540.1190.3020.070.230.535
10S0.540.0650.410.130.230.33
40S0.540.0880.3640.10.230.425
80S0.540.1190.3020.070.230.535
3/81050.6750.0490.5770.260.360.328
100.6750.0650.5450.230.360.423
300.6750.0730.5290.220.360.469
400.6750.0910.4930.190.360.568
800.6750.1260.4230.140.360.739
STD0.6750.0910.4930.190.360.568
XS0.6750.1260.4230.140.360.739
10S0.6750.0650.5450.230.360.423
40S0.6750.0910.4930.190.360.568
80S0.6750.1260.4230.140.360.739
1/21550.840.0650.710.40.550.538
100.840.0830.6740.360.550.671
300.840.0950.650.330.550.753
400.840.1090.6220.30.550.853
800.840.1470.5460.230.551.089
1200.840.170.50.20.551.216
1600.840.1880.4640.170.551.31
STD0.840.1090.6220.30.550.853
XS0.840.1470.5460.230.551.089
XXS0.840.2940.2520.050.551.714
5S0.840.0650.710.40.550.538
10S0.840.0830.6740.360.550.671
40S0.840.1090.6220.30.550.853
80S0.840.1470.5460.230.551.089
160S0.840.1880.4640.170.551.31
3/42051.050.0650.920.660.870.685
101.050.0830.8840.610.870.86
301.050.0950.860.580.870.968
401.050.1130.8240.530.871.129
801.050.1540.7420.430.871.472
1601.050.2190.6120.290.871.942
STD1.050.1130.8240.530.871.129
XS1.050.1540.7420.430.871.472
XXS1.050.3080.4340.150.872.439
5S1.050.0650.920.660.870.685
10S1.050.0830.8840.610.870.86
40S1.050.1130.8240.530.871.129
80S1.050.1540.7420.430.871.472
160S1.050.2190.6110.290.871.949
12551.3150.0651.1851.11.360.867
101.3150.1091.0970.951.361.404
301.3150.1141.0870.931.361.465
401.3150.1331.0490.861.361.68
801.3150.1790.9570.721.362.17
1601.3150.250.8150.521.362.842
STD1.3150.1331.0490.861.361.68
XS1.3150.1790.9570.721.362.17
XXS1.3150.3580.5990.281.363.662
5S1.3150.0651.1851.11.360.867
10S1.3150.1091.0970.951.361.404
40S1.3150.1331.0490.861.361.68
80S1.3150.1790.9570.721.362.17
160S1.3150.250.8150.521.362.842
1 1/43251.660.0651.531.842.161.109
101.660.1091.4421.632.161.808
301.660.1171.4261.62.161.929
401.660.141.381.52.162.271
801.660.1911.2781.282.162.997
1601.660.251.161.062.163.763
STD1.660.141.381.52.162.271
XS1.660.1911.2781.282.162.997
XXS1.660.3820.8960.632.165.214
5S1.660.0651.531.842.161.109
10S1.660.1091.4421.632.161.808
40S1.660.141.381.52.162.271
80S1.660.1911.2781.282.162.997
160S1.660.251.161.062.163.763
1 1/24051.90.0651.772.462.841.277
101.90.1091.6822.222.842.083
301.90.1251.652.142.842.372
401.90.1451.612.042.842.715
801.90.21.51.772.843.629
1601.90.2811.3381.412.844.858
STD1.90.1451.612.042.842.715
XS1.90.21.51.772.843.629
XXS1.90.41.10.952.846.411
5S1.90.0651.772.462.841.277
10S1.90.1091.6822.222.842.083
40S1.90.1451.612.042.842.715
80S1.90.21.51.772.843.629
160S1.90.2811.3381.412.844.858
25052.3750.0652.2453.964.431.606
102.3750.1092.1573.654.432.641
302.3750.1252.1253.554.433.004
402.3750.1542.0673.364.433.656
802.3750.2181.9392.954.435.02
1202.3750.251.8752.764.435.671
1602.3750.3441.6872.244.437.459
STD2.3750.1542.0673.364.433.656
XS2.3750.2181.9392.954.435.02
XXS2.3750.4361.5031.774.439.004
5S2.3750.0652.2453.964.431.606
10S2.3750.1092.1573.654.432.641
40S2.3750.1542.0673.364.433.656
80S2.3750.2181.9392.954.435.02
160S2.3750.3441.6872.234.437.459
2 1/26552.8750.0832.7095.766.492.473
102.8750.122.6355.456.493.528
302.8750.1882.4994.96.495.396
402.8750.2032.4694.796.495.792
802.8750.2762.3234.246.497.66
1202.8750.32.2754.066.498.265
1602.8750.3752.1253.556.4910.012
STD2.8750.2032.4694.796.495.792
XS2.8750.2762.3234.246.497.66
XXS2.8750.5521.7712.466.4913.708
5S2.8750.0832.7095.766.492.473
10S2.8750.122.6355.456.493.528
40S2.8750.2032.4694.796.495.792
80S2.8750.2762.3234.246.497.66
160S2.8750.3752.1253.556.4910.012
38053.50.0833.3348.739.623.031
103.50.123.268.359.624.334
303.50.1883.1247.669.626.652
403.50.2163.0687.399.627.593
803.50.32.96.619.6210.281
1203.50.352.86.169.6211.759
1603.50.4382.6245.419.6214.313
STD3.50.2163.0687.399.627.593
XS3.50.32.96.619.6210.281
XXS3.50.62.34.159.6218.614
5S3.50.0833.3348.739.623.031
10S3.50.123.268.359.624.334
40S3.50.2163.0687.399.627.593
80S3.50.32.96.619.6210.281
160S3.50.4382.6245.419.6214.313
3 1/290540.0833.83411.512.63.474
1040.123.7611.112.64.973
3040.1883.62410.312.67.66
4040.2263.5489.8912.69.139
8040.3183.3648.8912.612.499
STD40.2263.5489.8912.69.139
XS40.3183.3648.8912.612.499
XXS40.6362.7285.8412.622.847
5S40.0833.83411.512.63.474
10S40.123.7611.112.64.973
40S40.2263.5489.8912.69.139
80S40.3183.3648.8912.612.499
410054.50.0834.33414.815.93.918
104.50.124.2614.315.95.611
304.50.1884.12413.415.98.668
404.50.2374.02612.715.910.819
604.50.2813.93812.215.912.633
804.50.3373.82611.515.914.985
1204.50.4373.62610.315.918.95
1604.50.5313.4389.2815.922.511
STD4.50.2374.02612.715.910.819
XS4.50.3373.82611.515.914.985
XXS4.50.6743.1527.815.927.551
5S4.50.0834.33414.815.93.918
10S4.50.124.2614.315.95.611
40S4.50.2374.02612.715.910.819
80S4.50.3373.82611.515.914.985
160S4.50.5313.4389.2815.922.511
4 1/21154050.2474.50615.919.612.566
8050.3554.2914.519.617.606
512555.5630.1095.34522.424.36.35
105.5630.1345.2952224.37.795
405.5630.2585.0472024.314.649
805.5630.3754.81318.224.320.764
1205.5630.54.56316.424.327.013
1605.5630.6254.31314.624.332.994
STD5.5630.2585.0472024.314.649
XS5.5630.3754.81318.224.320.764
XXS5.5630.754.0631324.338.571
5S5.5630.1095.34522.424.36.35
10S5.5630.1345.2952224.37.795
40S5.5630.2585.0472024.314.649
80S5.5630.3754.81318.224.320.764
160S5.5630.6254.31314.624.332.994
615056.6250.1096.40732.234.57.593
106.6250.1346.35731.734.59.273
406.6250.286.06528.934.518.95
806.6250.4325.76126.134.528.559
1206.6250.5625.50123.834.536.421
1606.6250.7195.18721.134.545.358
STD6.6250.286.06528.934.518.95
XS6.6250.4325.76126.134.528.559
XXS6.6250.8644.89718.834.553.153
5S6.6250.1096.40732.234.57.593
10S6.6250.1346.35731.734.59.273
40S6.6250.286.06528.934.518.95
80S6.6250.4325.76126.134.528.559
160S6.6250.7195.18621.134.545.358
820058.6250.1098.40755.558.49.945
108.6250.1488.32954.558.413.372
208.6250.258.12551.858.422.377
308.6250.258.12551.858.422.377
408.6250.3227.9815058.428.559
608.6250.4067.81347.958.435.614
808.6250.57.62545.758.443.409
1008.6250.5947.43743.458.450.935
1208.6250.7187.18940.658.460.612
1408.6250.8127.00138.558.467.869
1608.6250.9066.81336.558.474.589
STD8.6250.3227.9815058.428.559
XS8.6250.57.62545.758.443.409
XXS8.6250.8756.87537.158.472.573
5S8.6250.1098.40755.558.49.945
10S8.6250.1488.32954.558.413.372
40S8.6250.3227.9815058.428.559
80S8.6250.57.62545.758.443.409
160S8.6250.9066.81236.458.474.589
10250510.750.13410.48286.390.815.186
1010.750.16510.4285.390.818.681
2010.750.2510.2582.590.828.021
3010.750.30710.13680.790.834.27
4010.750.36510.0278.990.840.453
6010.750.59.7574.790.854.765
8010.750.5939.56471.890.864.307
10010.750.7199.31268.190.877.276
12010.750.8439.06464.590.889.372
14010.7518.7560.190.8104.155
16010.751.1258.556.790.8115.579
STD10.750.36510.0278.990.840.453
XS10.750.59.7574.790.854.765
XXS10.7518.7560.190.8104.155
5S10.750.13410.48286.390.815.186
10S10.750.16510.4285.390.818.681
40S10.750.36510.0278.990.840.453
80S10.750.59.7574.790.854.765
160S10.751.1258.556.790.8115.579
12300512.750.15612.43812212820.965
1012.750.1812.3912112824.191
2012.750.2512.2511812833.397
3012.750.3312.0911512843.745
4012.750.40611.93811212853.556
6012.750.511.7510812865.45
8012.750.68711.37610212888.7
10012.750.84411.06296.1128107.515
12012.75110.7590.8128125.658
14012.751.12510.586.6128139.77
16012.751.31210.12680.5128160.601
STD12.750.3751211312849.591
XS12.750.511.7510812865.45
XXS12.75110.7590.8128125.658
5S12.750.15612.43812212820.965
10S12.750.1812.3912112824.191
40S12.750.3751211312849.591
80S12.750.511.7510812865.45
160S12.751.31210.12680.5128160.601
143505140.15613.68814715423.049
10140.2513.514315436.69
20140.31213.37614115445.627
30140.37513.2513815454.564
40140.43713.12613515463.299
60140.59312.81412915484.668
80140.7512.5123154106.171
100140.93812.124115154131.034
120141.09311.814110154150.521
140141.2511.5104154170.008
160141.40611.18898.3154188.823
STD140.37513.2513815454.564
XS140.51313315471.901
5S140.15613.68814715423.049
10S140.18813.62414615427.752
40S140.37513.2513815454.564
80S140.51313315471.901
164005160.16515.6719320127.887
10160.2515.518920142.065
20160.31215.37618620152.279
30160.37515.2518320162.56
40160.51517720182.652
60160.65614.688169201107.515
80160.84314.314161201136.41
100161.03113.938153201164.632
120161.21813.564144201192.183
140161.43813.124135201223.766
160161.59312.814129201245.269
STD160.37515.2518320162.56
XS160.51517720182.652
5S160.16515.6719320127.887
10S160.18815.62419220131.717
40S160.37515.2518320162.56
80S160.51517720182.652
184505180.16517.6724525431.448
10180.2517.524125447.374
20180.31217.37623725458.932
30180.43717.12623025481.98
40180.56216.876224254104.827
60180.7516.5214254138.426
80180.93716.126204254170.68
100181.15615.688193254207.638
120181.37515.25183254243.925
140181.56214.876174254274.163
160181.78114.438164254308.434
STD180.37517.2523425470.557
XS180.51722725493.404
5S180.16517.6724525431.448
10S180.18817.62424425435.749
40S180.37517.2523425470.557
80S180.51722725493.404
205005200.18819.62430231439.781
10200.2519.529931452.75
20200.37519.2529131478.62
30200.519284314104.155
40200.59318.814278314122.97
60200.81218.376265314166.648
80201.03117.938253314208.982
100201.28117.438239314256.02
120201.517227314296.338
140201.7516.5214314341.36
160201.96816.064203314378.991
STD200.37519.2529131478.62
XS200.519284314104.155
5S200.18819.62430231439.781
10S200.21819.56430131446.03
40S200.37519.2529131478.62
80S200.519284314104.155
2255010220.2521.536338058.058
20220.37521.2535538086.684
30220.521346380114.907
60220.87520.25322380197.559
80221.12519.75306380250.644
100221.37519.25291380303.058
120221.62518.75276380353.456
140221.87518.25262380403.181
160222.12517.75247380450.891
STD220.37521.2535538086.684
XS220.521346380114.907
5S220.18821.62436738043.812
10S220.21821.56436538050.734
246005240.21823.56443645255.37
10240.2523.543445263.434
20240.37523.2542545294.748
30240.56222.876411452140.442
40240.68722.626402452171.352
60240.96822.064382452237.877
80241.21821.564365452296.338
100241.53120.938344452367.567
120241.81220.376326452429.388
140242.06219.876310452483.146
160242.34319.314293452542.279
STD240.37523.2542545294.748
XS240.523415452125.658
5S240.21823.56443645255.37
10S240.2523.543445263.434
40S240.37523.2542545294.748
80S240.523415452125.658
2665010260.31225.37650653185.34
20260.525491531136.41
STD260.37525.25501531102.811
XS260.525491531136.41
2870010280.31227.37658961692.06
20280.527573616147.161
30280.62526.75562616182.776
STD280.37527.25583616110.875
XS280.527573616147.161
3075010300.31229.37667870798.779
20300.529661707157.241
30300.62528.75649707196.215
STD300.37529.25672707118.939
XS300.529661707157.241
40S300.37529.25672707118.939
80S300.529661707157.241
3280010320.31231.376773804105.499
20320.531755804167.992
30320.62530.75743804209.654
40320.68830.624737804229.813
STD320.37531.25767804126.33
XS320.531755804167.992
3485010340.34433.312872908123.642
20340.533855908178.744
30340.62532.75842908223.094
40340.68832.624836908244.597
STD340.37533.25868908134.394
XS340.533855908178.744
3690010360.31235.3769831020118.939
20360.5359621020189.495
30360.62534.759481020235.861
40360.7534.59351020282.227
STD360.37535.259761020142.457
XS360.5359621020189.495
40S360.37535.259761020142.457
80S360.5359621020189.495
42105020420.54113201390221.75
30420.62540.7513001390276.179
40420.7540.512901390330.609
STD420.37541.2513401390166.648
XS420.54113201390221.75