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# -*- coding: utf-8 -*- 

'''Chemical Engineering Design Library (ChEDL). Utilities for process modeling. 

Copyright (C) 2016, Caleb Bell <Caleb.Andrew.Bell@gmail.com> 

 

Permission is hereby granted, free of charge, to any person obtaining a copy 

of this software and associated documentation files (the "Software"), to deal 

in the Software without restriction, including without limitation the rights 

to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 

copies of the Software, and to permit persons to whom the Software is 

furnished to do so, subject to the following conditions: 

 

The above copyright notice and this permission notice shall be included in all 

copies or substantial portions of the Software. 

 

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 

IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 

FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 

AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 

LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 

OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 

SOFTWARE.''' 

 

from __future__ import division 

from math import pi 

from scipy.constants import inch 

 

__all__ = ['nearest_pipe', 'gauge_from_t', 't_from_gauge', 'wire_schedules'] 

 

# Schedules 5, 10, 20, 30, 40, 60, 80, 100, 120, 140, 160 from 

# ASME B36.10M - Welded and Seamless Wrought Steel Pipe 

# All schedule lists stored in mm, other than NPS. 

# i = inner diameter, o = outer diameter, and t = wall thickness in variable names 

 

NPS5 = [0.5, 0.75, 1, 1.25, 1.5, 2, 2.5, 3, 3.5, 4, 5, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 30] 

S5i = [18, 23.4, 30.1, 38.9, 45, 57, 68.78, 84.68, 97.38, 110.08, 135.76, 162.76, 213.56, 266.2, 315.88, 347.68, 398.02, 448.62, 498.44, 549.44, 598.92, 749.3] 

S5o = [21.3, 26.7, 33.4, 42.2, 48.3, 60.3, 73, 88.9, 101.6, 114.3, 141.3, 168.3, 219.1, 273, 323.8, 355.6, 406.4, 457, 508, 559, 610, 762] 

S5t = [1.65, 1.65, 1.65, 1.65, 1.65, 1.65, 2.11, 2.11, 2.11, 2.11, 2.77, 2.77, 2.77, 3.4, 3.96, 3.96, 4.19, 4.19, 4.78, 4.78, 5.54, 6.35] 

 

NPS10 = [0.125, 0.25, 0.375, 0.5, 0.75, 1, 1.25, 1.5, 2, 2.5, 3, 3.5, 4, 5, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36] 

S10i = [7.82, 10.4, 13.8, 17.08, 22.48, 27.86, 36.66, 42.76, 54.76, 66.9, 82.8, 95.5, 108.2, 134.5, 161.5, 211.58, 264.62, 314.66, 342.9, 393.7, 444.3, 495.3, 546.3, 597.3, 644.16, 695.16, 746.16, 797.16, 848.16, 898.16] 

S10o = [10.3, 13.7, 17.1, 21.3, 26.7, 33.4, 42.2, 48.3, 60.3, 73, 88.9, 101.6, 114.3, 141.3, 168.3, 219.1, 273, 323.8, 355.6, 406.4, 457, 508, 559, 610, 660, 711, 762, 813, 864, 914] 

S10t = [1.24, 1.65, 1.65, 2.11, 2.11, 2.77, 2.77, 2.77, 2.77, 3.05, 3.05, 3.05, 3.05, 3.4, 3.4, 3.76, 4.19, 4.57, 6.35, 6.35, 6.35, 6.35, 6.35, 6.35, 7.92, 7.92, 7.92, 7.92, 7.92, 7.92] 

 

NPS20 = [8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36] 

S20i = [206.4, 260.3, 311.1, 339.76, 390.56, 441.16, 488.94, 539.94, 590.94, 634.6, 685.6, 736.6, 787.6, 838.6, 888.6] 

S20o = [219.1, 273, 323.8, 355.6, 406.4, 457, 508, 559, 610, 660, 711, 762, 813, 864, 914] 

S20t = [6.35, 6.35, 6.35, 7.92, 7.92, 7.92, 9.53, 9.53, 9.53, 12.7, 12.7, 12.7, 12.7, 12.7, 12.7] 

 

NPS30 = [0.125, 0.25, 0.375, 0.5, 0.75, 1, 1.25, 1.5, 2, 2.5, 3, 3.5, 4, 8, 10, 12, 14, 16, 18, 20, 22, 24, 28, 30, 32, 34, 36] 

S30i = [7.4, 10, 13.4, 16.48, 21.88, 27.6, 36.26, 41.94, 53.94, 63.44, 79.34, 92.04, 104.74, 205.02, 257.4, 307.04, 336.54, 387.34, 434.74, 482.6, 533.6, 581.46, 679.24, 730.24, 781.24, 832.24, 882.24] 

S30o = [10.3, 13.7, 17.1, 21.3, 26.7, 33.4, 42.2, 48.3, 60.3, 73, 88.9, 101.6, 114.3, 219.1, 273, 323.8, 355.6, 406.4, 457, 508, 559, 610, 711, 762, 813, 864, 914] 

S30t = [1.45, 1.85, 1.85, 2.41, 2.41, 2.9, 2.97, 3.18, 3.18, 4.78, 4.78, 4.78, 4.78, 7.04, 7.8, 8.38, 9.53, 9.53, 11.13, 12.7, 12.7, 14.27, 15.88, 15.88, 15.88, 15.88, 15.88] 

 

NPS40 = [0.125, 0.25, 0.375, 0.5, 0.75, 1, 1.25, 1.5, 2, 2.5, 3, 3.5, 4, 5, 6, 8, 10, 12, 14, 16, 18, 20, 24, 32, 34, 36] 

S40i = [6.84, 9.22, 12.48, 15.76, 20.96, 26.64, 35.08, 40.94, 52.48, 62.68, 77.92, 90.12, 102.26, 128.2, 154.08, 202.74, 254.46, 303.18, 333.34, 381, 428.46, 477.82, 575.04, 778.04, 829.04, 875.9] 

S40o = [10.3, 13.7, 17.1, 21.3, 26.7, 33.4, 42.2, 48.3, 60.3, 73, 88.9, 101.6, 114.3, 141.3, 168.3, 219.1, 273, 323.8, 355.6, 406.4, 457, 508, 610, 813, 864, 914] 

S40t = [1.73, 2.24, 2.31, 2.77, 2.87, 3.38, 3.56, 3.68, 3.91, 5.16, 5.49, 5.74, 6.02, 6.55, 7.11, 8.18, 9.27, 10.31, 11.13, 12.7, 14.27, 15.09, 17.48, 17.48, 17.48, 19.05] 

 

NPS60 = [8, 10, 12, 14, 16, 18, 20, 22, 24] 

S60i = [198.48, 247.6, 295.26, 325.42, 373.08, 418.9, 466.76, 514.54, 560.78] 

S60o = [219.1, 273, 323.8, 355.6, 406.4, 457, 508, 559, 610] 

S60t = [10.31, 12.7, 14.27, 15.09, 16.66, 19.05, 20.62, 22.23, 24.61] 

 

NPS80 = [0.125, 0.25, 0.375, 0.5, 0.75, 1, 1.25, 1.5, 2, 2.5, 3, 3.5, 4, 5, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24] 

S80i = [5.48, 7.66, 10.7, 13.84, 18.88, 24.3, 32.5, 38.14, 49.22, 58.98, 73.66, 85.44, 97.18, 122.24, 146.36, 193.7, 242.82, 288.84, 317.5, 363.52, 409.34, 455.62, 501.84, 548.08] 

S80o = [10.3, 13.7, 17.1, 21.3, 26.7, 33.4, 42.2, 48.3, 60.3, 73, 88.9, 101.6, 114.3, 141.3, 168.3, 219.1, 273, 323.8, 355.6, 406.4, 457, 508, 559, 610] 

S80t = [2.41, 3.02, 3.2, 3.73, 3.91, 4.55, 4.85, 5.08, 5.54, 7.01, 7.62, 8.08, 8.56, 9.53, 10.97, 12.7, 15.09, 17.48, 19.05, 21.44, 23.83, 26.19, 28.58, 30.96] 

 

NPS100 = [8, 10, 12, 14, 16, 18, 20, 22, 24] 

S100i = [188.92, 236.48, 280.92, 307.94, 354.02, 398.28, 442.92, 489.14, 532.22] 

S100o = [219.1, 273, 323.8, 355.6, 406.4, 457, 508, 559, 610] 

S100t = [15.09, 18.26, 21.44, 23.83, 26.19, 29.36, 32.54, 34.93, 38.89] 

 

NPS120 = [4, 5, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24] 

S120i = [92.04, 115.9, 139.76, 182.58, 230.12, 273, 300.02, 344.48, 387.14, 431.8, 476.44, 517.96] 

S120o = [114.3, 141.3, 168.3, 219.1, 273, 323.8, 355.6, 406.4, 457, 508, 559, 610] 

S120t = [11.13, 12.7, 14.27, 18.26, 21.44, 25.4, 27.79, 30.96, 34.93, 38.1, 41.28, 46.02] 

 

NPS140 = [8, 10, 12, 14, 16, 18, 20, 22, 24] 

S140i = [177.86, 222.2, 266.64, 292.1, 333.34, 377.66, 419.1, 463.74, 505.26] 

S140o = [219.1, 273, 323.8, 355.6, 406.4, 457, 508, 559, 610] 

S140t = [20.62, 25.4, 28.58, 31.75, 36.53, 39.67, 44.45, 47.63, 52.37] 

 

NPS160 = [0.5, 0.75, 1, 1.25, 1.5, 2, 2.5, 3, 4, 5, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24] 

S160i = [11.74, 15.58, 20.7, 29.5, 34.02, 42.82, 53.94, 66.64, 87.32, 109.54, 131.78, 173.08, 215.84, 257.16, 284.18, 325.42, 366.52, 407.98, 451.04, 490.92] 

S160o = [21.3, 26.7, 33.4, 42.2, 48.3, 60.3, 73, 88.9, 114.3, 141.3, 168.3, 219.1, 273, 323.8, 355.6, 406.4, 457, 508, 559, 610] 

S160t = [4.78, 5.56, 6.35, 6.35, 7.14, 8.74, 9.53, 11.13, 13.49, 15.88, 18.26, 23.01, 28.58, 33.32, 35.71, 40.49, 45.24, 50.01, 53.98, 59.54] 

 

# Schedules designated STD, XS, and XXS 

NPSSTD = [0.125, 0.25, 0.375, 0.5, 0.75, 1, 1.25, 1.5, 2, 2.5, 3, 3.5, 4, 5, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48] 

STDi = [6.84, 9.22, 12.48, 15.76, 20.96, 26.64, 35.08, 40.94, 52.48, 62.68, 77.92, 90.12, 102.26, 128.2, 154.08, 202.74, 254.46, 304.74, 336.54, 387.34, 437.94, 488.94, 539.94, 590.94, 640.94, 691.94, 742.94, 793.94, 844.94, 894.94, 945.94, 996.94, 1047.94, 1098.94, 1148.94, 1199.94] 

STDo = [10.3, 13.7, 17.1, 21.3, 26.7, 33.4, 42.2, 48.3, 60.3, 73, 88.9, 101.6, 114.3, 141.3, 168.3, 219.1, 273, 323.8, 355.6, 406.4, 457, 508, 559, 610, 660, 711, 762, 813, 864, 914, 965, 1016, 1067, 1118, 1168, 1219] 

STDt = [1.73, 2.24, 2.31, 2.77, 2.87, 3.38, 3.56, 3.68, 3.91, 5.16, 5.49, 5.74, 6.02, 6.55, 7.11, 8.18, 9.27, 9.53, 9.53, 9.53, 9.53, 9.53, 9.53, 9.53, 9.53, 9.53, 9.53, 9.53, 9.53, 9.53, 9.53, 9.53, 9.53, 9.53, 9.53, 9.53] 

 

NPSXS = [0.125, 0.25, 0.375, 0.5, 0.75, 1, 1.25, 1.5, 2, 2.5, 3, 3.5, 4, 5, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48] 

XSi = [5.48, 7.66, 10.7, 13.84, 18.88, 24.3, 32.5, 38.14, 49.22, 58.98, 73.66, 85.44, 97.18, 122.24, 146.36, 193.7, 247.6, 298.4, 330.2, 381, 431.6, 482.6, 533.6, 584.6, 634.6, 685.6, 736.6, 787.6, 838.6, 888.6, 939.6, 990.6, 1041.6, 1092.6, 1142.6, 1193.6] 

XSo = [10.3, 13.7, 17.1, 21.3, 26.7, 33.4, 42.2, 48.3, 60.3, 73, 88.9, 101.6, 114.3, 141.3, 168.3, 219.1, 273, 323.8, 355.6, 406.4, 457, 508, 559, 610, 660, 711, 762, 813, 864, 914, 965, 1016, 1067, 1118, 1168, 1219] 

XSt = [2.41, 3.02, 3.2, 3.73, 3.91, 4.55, 4.85, 5.08, 5.54, 7.01, 7.62, 8.08, 8.56, 9.53, 10.97, 12.7, 12.7, 12.7, 12.7, 12.7, 12.7, 12.7, 12.7, 12.7, 12.7, 12.7, 12.7, 12.7, 12.7, 12.7, 12.7, 12.7, 12.7, 12.7, 12.7, 12.7] 

 

NPSXXS = [0.5, 0.75, 1, 1.25, 1.5, 2, 2.5, 3, 4, 5, 6, 8, 10, 12] 

XXSi = [6.36, 11.06, 15.22, 22.8, 28, 38.16, 44.96, 58.42, 80.06, 103.2, 124.4, 174.64, 222.2, 273] 

XXSo = [21.3, 26.7, 33.4, 42.2, 48.3, 60.3, 73, 88.9, 114.3, 141.3, 168.3, 219.1, 273, 323.8] 

XXSt = [7.47, 7.82, 9.09, 9.7, 10.15, 11.07, 14.02, 15.24, 17.12, 19.05, 21.95, 22.23, 25.4, 25.4] 

 

NPSS5 = [0.5, 0.75, 1, 1.25, 1.5, 2, 2.5, 3, 3.5, 4, 5, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 30] 

SS5DN = [15, 20, 25, 32, 40, 50, 65, 80, 90, 100, 125, 150, 200, 250, 300, 350, 400, 450, 500, 550, 600, 750] 

SS5i = [18, 23.4, 30.1, 38.9, 45, 57, 68.78, 84.68, 97.38, 110.08, 135.76, 162.76, 213.56, 266.3, 315.98, 347.68, 398.02, 448.62, 498.44, 549.44, 598.92, 749.3] 

SS5o = [21.3, 26.7, 33.4, 42.2, 48.3, 60.3, 73, 88.9, 101.6, 114.3, 141.3, 168.3, 219.1, 273.1, 323.9, 355.6, 406.4, 457, 508, 559, 610, 762] 

SS5t = [1.65, 1.65, 1.65, 1.65, 1.65, 1.65, 2.11, 2.11, 2.11, 2.11, 2.77, 2.77, 2.77, 3.4, 3.96, 3.96, 4.19, 4.19, 4.78, 4.78, 5.54, 6.35] 

 

# Schedules 10, 40 and 80 from ASME B36.19M - Stainless Steel Pipe 

NPSS10 = [0.125, 0.25, 0.375, 0.5, 0.75, 1, 1.25, 1.5, 2, 2.5, 3, 3.5, 4, 5, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 30] 

SS10DN = [6, 8, 10, 15, 20, 25, 32, 40, 50, 65, 80, 90, 100, 125, 150, 200, 250, 300, 350, 400, 450, 500, 550, 600, 750] 

SS10i = [7.82, 10.4, 13.8, 17.08, 22.48, 27.86, 36.66, 42.76, 54.76, 66.9, 82.8, 95.5, 108.2, 134.5, 161.5, 211.58, 264.72, 314.76, 346.04, 396.84, 447.44, 496.92, 547.92, 597.3, 746.16] 

SS10o = [10.3, 13.7, 17.1, 21.3, 26.7, 33.4, 42.2, 48.3, 60.3, 73, 88.9, 101.6, 114.3, 141.3, 168.3, 219.1, 273.1, 323.9, 355.6, 406.4, 457, 508, 559, 610, 762] 

SS10t = [1.24, 1.65, 1.65, 2.11, 2.11, 2.77, 2.77, 2.77, 2.77, 3.05, 3.05, 3.05, 3.05, 3.4, 3.4, 3.76, 4.19, 4.57, 4.78, 4.78, 4.78, 5.54, 5.54, 6.35, 7.92] 

 

NPSS40 = [0.125, 0.25, 0.375, 0.5, 0.75, 1, 1.25, 1.5, 2, 2.5, 3, 3.5, 4, 5, 6, 8, 10, 12, 14, 16, 18, 20, 24] 

SS40DN = [6, 8, 10, 15, 20, 25, 32, 40, 50, 65, 80, 90, 100, 125, 150, 200, 250, 300, 350, 400, 450, 500, 600] 

SS40i = [6.84, 9.22, 12.48, 15.76, 20.96, 26.64, 35.08, 40.94, 52.48, 62.68, 77.92, 90.12, 102.26, 128.2, 154.08, 202.74, 254.56, 304.84, 336.54, 387.34, 437.94, 488.94, 590.94] 

SS40o = [10.3, 13.7, 17.1, 21.3, 26.7, 33.4, 42.2, 48.3, 60.3, 73, 88.9, 101.6, 114.3, 141.3, 168.3, 219.1, 273.1, 323.9, 355.6, 406.4, 457, 508, 610] 

SS40t = [1.73, 2.24, 2.31, 2.77, 2.87, 3.38, 3.56, 3.68, 3.91, 5.16, 5.49, 5.74, 6.02, 6.55, 7.11, 8.18, 9.27, 9.53, 9.53, 9.53, 9.53, 9.53, 9.53] 

 

NPSS80 = [0.125, 0.25, 0.375, 0.5, 0.75, 1, 1.25, 1.5, 2, 2.5, 3, 3.5, 4, 5, 6, 8, 10, 12, 14, 16, 18, 20, 24] 

SS80DN = [6, 8, 10, 15, 20, 25, 32, 40, 50, 65, 80, 90, 100, 125, 150, 200, 250, 300, 350, 400, 450, 500, 600] 

SS80i = [5.48, 7.66, 10.7, 13.84, 18.88, 24.3, 32.5, 38.14, 49.22, 58.98, 73.66, 85.44, 97.18, 122.24, 146.36, 193.7, 247.7, 298.5, 330.2, 381, 431.6, 482.6, 584.6] 

SS80o = [10.3, 13.7, 17.1, 21.3, 26.7, 33.4, 42.2, 48.3, 60.3, 73, 88.9, 101.6, 114.3, 141.3, 168.3, 219.1, 273.1, 323.9, 355.6, 406.4, 457, 508, 610] 

SS80t = [2.41, 3.02, 3.2, 3.73, 3.91, 4.55, 4.85, 5.08, 5.54, 7.01, 7.62, 8.08, 8.56, 9.53, 10.97, 12.7, 12.7, 12.7, 12.7, 12.7, 12.7, 12.7, 12.7] 

 

 

def nearest_pipe(Do=None, Di=None, NPS=None, schedule='40'): 

r'''Searches for and finds the nearest standard pipe size to a given 

specification. Acceptable inputs are: 

 

- Nominal pipe size 

- Nominal pipe size and schedule 

- Outer diameter `Do` 

- Outer diameter `Do` and schedule 

- Inner diameter `Di` 

- Inner diameter `Di` and schedule 

 

Acceptable schedules are: '5', '10', '20', '30', '40', '60', '80', '100', 

'120', '140', '160', 'STD', 'XS', 'XXS', '5S', '10S', '40S', '80S'. 

 

Parameters 

---------- 

Do : float 

Pipe outer diameter, [m] 

Di : float 

Pipe inner diameter, [m] 

NPS : float 

Nominal pipe size, [] 

schedule : str 

String representing schedule size 

 

Returns 

------- 

NPS : float 

Nominal pipe size, [] 

Di : float 

Pipe inner diameter, [m] 

Do : float 

Pipe outer diameter, [m] 

t : float 

Pipe wall thickness, [m] 

 

Notes 

----- 

Internal units within this function are mm. 

The imperial schedules are not quite identical to these value, but 

all rounding differences happen in the sub-0.1 mm level. 

 

Examples 

-------- 

>>> nearest_pipe(Di=0.021) 

(1, 0.02664, 0.0334, 0.0033799999999999998) 

>>> nearest_pipe(Do=.273, schedule='5S') 

(10, 0.26630000000000004, 0.2731, 0.0034) 

 

References 

---------- 

.. [1] American National Standards Institute, and American Society of 

Mechanical Engineers. B36.10M-2004: Welded and Seamless Wrought Steel 

Pipe. New York: American Society of Mechanical Engineers, 2004. 

.. [2] American National Standards Institute, and American Society of 

Mechanical Engineers. B36-19M-2004: Stainless Steel Pipe. 

New York, N.Y.: American Society of Mechanical Engineers, 2004. 

''' 

if Di: Di = Di*1000 

if Do: Do = Do*1000 

if NPS: NPS = float(NPS) 

 

def Di_lookup(Di, NPSes, Dis, Dos, ts): 

for i in range(len(Dis)): # Go up ascending list; once larger than specified, return 

if Dis[-1] < Di: 

return None 

if Dis[i] >= Di: 

_nps, _di, _do, _t = NPSes[i], Dis[i], Dos[i], ts[i] 

return (_nps, _di, _do, _t) 

raise Exception('Di lookup failed') 

 

def Do_lookup(Do, NPSes, Dis, Dos, ts): 

for i in range(len(Dos)): # Go up ascending list; once larger than specified, return 

if Dos[-1] < Do: 

return None 

if Dos[i] >= Do: 

_nps, _di, _do, _t = NPSes[i], Dis[i], Dos[i], ts[i] 

return (_nps, _di, _do, _t) 

raise Exception('Di lookup failed') 

 

def NPS_lookup(NPS, NPSes, Dis, Dos, ts): 

for i in range(len(NPSes)): # Go up ascending list; once larger than specified, return 

if NPSes[i] == NPS: 

_nps, _di, _do, _t = NPSes[i], Dis[i], Dos[i], ts[i] 

return (_nps, _di, _do, _t) 

raise Exception('NPS not in list') 

 

def lookup_wrapper(Di, Do, NPS, NPSes, Dis, Dos, ts): 

if Di: 

nums = Di_lookup(Di, NPSes, Dis, Dos, ts) 

if nums is None: 

return None 

_nps, _di, _do, _t = nums 

elif Do: 

nums = Do_lookup(Do, NPSes, Dis, Dos, ts) 

if nums is None: 

return None 

_nps, _di, _do, _t = nums 

elif NPS: 

_nps, _di, _do, _t = NPS_lookup(NPS, NPSes, Dis, Dos, ts) 

return _nps, _di, _do, _t 

 

# If accidentally given numerical schedule, convert to string 

if type(1) == type(schedule) or type(1.1) == type(schedule): 

schedule = str(int(schedule)) 

 

if schedule == '40': 

nums = lookup_wrapper(Di, Do, NPS, NPS40, S40i, S40o, S40t) 

elif schedule == '5': 

nums = lookup_wrapper(Di, Do, NPS, NPS5, S5i, S5o, S5t) 

elif schedule == '10': 

nums = lookup_wrapper(Di, Do, NPS, NPS10, S10i, S10o, S10t) 

elif schedule == '20': 

nums = lookup_wrapper(Di, Do, NPS, NPS20, S20i, S20o, S20t) 

elif schedule == '30': 

nums = lookup_wrapper(Di, Do, NPS, NPS30, S30i, S30o, S30t) 

elif schedule == '60': 

nums = lookup_wrapper(Di, Do, NPS, NPS60, S60i, S60o, S60t) 

elif schedule == '80': 

nums = lookup_wrapper(Di, Do, NPS, NPS80, S80i, S80o, S80t) 

elif schedule == '100': 

nums = lookup_wrapper(Di, Do, NPS, NPS100, S100i, S100o, S100t) 

elif schedule == '120': 

nums = lookup_wrapper(Di, Do, NPS, NPS120, S120i, S120o, S120t) 

elif schedule == '140': 

nums = lookup_wrapper(Di, Do, NPS, NPS140, S140i, S140o, S140t) 

elif schedule == '160': 

nums = lookup_wrapper(Di, Do, NPS, NPS160, S160i, S160o, S160t) 

elif schedule == 'STD': 

nums = lookup_wrapper(Di, Do, NPS, NPSSTD, STDi, STDo, STDt) 

elif schedule == 'XS': 

nums = lookup_wrapper(Di, Do, NPS, NPSXS, XSi, XSo, XSt) 

elif schedule == 'XXS': 

nums = lookup_wrapper(Di, Do, NPS, NPSXXS, XXSi, XXSo, XXSt) 

elif schedule == '5S': 

nums = lookup_wrapper(Di, Do, NPS, NPSS5, SS5i, SS5o, SS5t) 

elif schedule == '10S': 

nums = lookup_wrapper(Di, Do, NPS, NPSS10, SS10i, SS10o, SS10t) 

elif schedule == '40S': 

nums = lookup_wrapper(Di, Do, NPS, NPSS40, SS40i, SS40o, SS40t) 

elif schedule == '80S': 

nums = lookup_wrapper(Di, Do, NPS, NPSS80, SS80i, SS80o, SS80t) 

else: 

raise ValueError('Schedule not recognized') 

if nums is None: 

raise ValueError('Pipe input is larger than max of selected scedule') 

_nps, _di, _do, _t = nums 

return _nps, _di/1E3, _do/1E3, _t/1E3 

 

### Wire gauge schedules 

 

# Stub's Steel Wire Gage 

SSWG_integers = list(range(1, 81)) 

SSWG_inch = [0.227, 0.219, 0.212, 0.207, 0.204, 0.201, 0.199, 0.197, 0.194, 

0.191, 0.188, 0.185, 0.182, 0.18, 0.178, 0.175, 0.172, 0.168, 

0.164, 0.161, 0.157, 0.155, 0.153, 0.151, 0.148, 0.146, 0.143, 

0.139, 0.134, 0.127, 0.12, 0.115, 0.112, 0.11, 0.108, 0.106, 

0.103, 0.101, 0.099, 0.097, 0.095, 0.092, 0.088, 0.085, 0.081, 

0.079, 0.077, 0.075, 0.072, 0.069, 0.066, 0.063, 0.058, 0.055, 

0.05, 0.045, 0.042, 0.041, 0.04, 0.039, 0.038, 0.037, 0.036, 

0.035, 0.033, 0.032, 0.031, 0.03, 0.029, 0.027, 0.026, 0.024, 

0.023, 0.022, 0.02, 0.018, 0.016, 0.015, 0.014, 0.013] 

SSWG_SI = [round(i*inch, 7) for i in SSWG_inch] # 7 decimals for equal conversion 

 

 

# British Standard Wire Gage (Imperial Wire Gage) 

BSWG_integers = [0.143, .167, 0.2, 0.25, 0.33, 0.5] + list(range(51)) 

BSWG_inch = [0.5, 0.464, 0.432, 0.4, 0.372, 0.348, 0.324, 0.3, 0.276, 0.252, 0.232, 

0.212, 0.192, 0.176, 0.16, 0.144, 0.128, 0.116, 0.104, 0.092, 0.08, 

0.072, 0.064, 0.056, 0.048, 0.04, 0.036, 0.032, 0.028, 0.024, 0.022, 

0.02, 0.018, 0.0164, 0.0149, 0.0136, 0.0124, 0.0116, 0.0108, 0.01, 

0.0092, 0.0084, 0.0076, 0.0068, 0.006, 0.0052, 0.0048, 0.0044, 0.004, 

0.0036, 0.0032, 0.0028, 0.0024, 0.002, 0.0016, 0.0012, 0.001] 

BSWG_SI = [round(i*inch,8) for i in BSWG_inch] # 8 decimals for equal conversion 

 

 

# Music Wire Gauge 

MWG_integers = [.167, 0.2, 0.25, 0.33, 0.5] + list(range(46)) 

MWG_inch = [0.004, 0.005, 0.006, 0.007, 0.008, 0.009, 0.01, 0.011, 0.012, 

0.013, 0.014, 0.016, 0.018, 0.02, 0.022, 0.024, 0.026, 0.029, 

0.031, 0.033, 0.035, 0.037, 0.039, 0.041, 0.043, 0.045, 0.047, 

0.049, 0.051, 0.055, 0.059, 0.063, 0.067, 0.071, 0.075, 0.08, 

0.085, 0.09, 0.095, 0.1, 0.106, 0.112, 0.118, 0.124, 0.13, 0.138, 

0.146, 0.154, 0.162, 0.17, 0.18] 

MWG_SI = [round(i*inch,7) for i in MWG_inch] # 7 decimals for equal conversion 

# Scale gets bigger instead of smaller; reverse for convenience 

MWG_integers.reverse() 

MWG_inch.reverse() 

MWG_SI.reverse() 

 

# Steel Wire Gage -Also Washburn & Moen gage, American Steel gage; 

# Wire Co.gage; Roebling Wire Gages. 

SWG_integers = [0.143, .167, 0.2, 0.25, 0.33, 0.5] + list(range(51)) 

SWG_inch = [0.49, 0.4615, 0.4305, 0.3938, 0.3625, 0.331, 0.3065, 0.283, 0.2625, 

0.2437, 0.2253, 0.207, 0.192, 0.177, 0.162, 0.1483, 0.135, 0.1205, 

0.1055, 0.0915, 0.08, 0.072, 0.0625, 0.054, 0.0475, 0.041, 0.0348, 

0.0318, 0.0286, 0.0258, 0.023, 0.0204, 0.0181, 0.0173, 0.0162, 

0.015, 0.014, 0.0132, 0.0128, 0.0118, 0.0104, 0.0095, 0.009, 

0.0085, 0.008, 0.0075, 0.007, 0.0066, 0.0062, 0.006, 0.0058, 

0.0055, 0.0052, 0.005, 0.0048, 0.0046, 0.0044] 

SWG_SI = [round(i*inch,8) for i in SWG_inch] # 8 decimals for equal conversion 

 

 

# American Wire or Brown & Sharpe Gage 

AWG_integers = [.167, 0.2, 0.25, 0.33, 0.5] + list(range(51)) 

AWG_inch = [0.58, 0.5165, 0.46, 0.4096, 0.3648, 0.3249, 0.2893, 0.2576, 0.2294, 

0.2043, 0.1819, 0.162, 0.1443, 0.1285, 0.1144, 0.1019, 0.0907, 

0.0808, 0.072, 0.0641, 0.0571, 0.0508, 0.0453, 0.0403, 0.0359, 

0.032, 0.0285, 0.0253, 0.0226, 0.0201, 0.0179, 0.0159, 0.0142, 

0.0126, 0.0113, 0.01, 0.00893, 0.00795, 0.00708, 0.0063, 0.00561, 

0.005, 0.00445, 0.00396, 0.00353, 0.00314, 0.0028, 0.00249, 

0.00222, 0.00198, 0.00176, 0.00157, 0.0014, 0.00124, 0.00111, 

0.00099] 

AWG_SI = [round(i*inch,9) for i in AWG_inch] # 9 decimals for equal conversion 

 

 

# Birmingham or Stub's Iron Wire Gage 

BWG_integers = [0.2, 0.25, 0.33, 0.5] + list(range(37)) 

BWG_inch = [0.5, 0.454, 0.425, 0.38, 0.34, 0.3, 0.284, 0.259, 0.238, 0.22, 

0.203, 0.18, 0.165, 0.148, 0.134, 0.12, 0.109, 0.095, 0.083, 

0.072, 0.065, 0.058, 0.049, 0.042, 0.035, 0.032, 0.028, 0.025, 

0.022, 0.02, 0.018, 0.016, 0.014, 0.013, 0.012, 0.01, 0.009, 

0.008, 0.007, 0.005, 0.004] 

BWG_SI = [round(i*inch,6) for i in BWG_inch] 

 

wire_schedules = {'BWG': (BWG_integers, BWG_inch, BWG_SI, True), 

'AWG': (AWG_integers, AWG_inch, AWG_SI, True), 

'SWG': (SWG_integers, SWG_inch, SWG_SI, True), 

'MWG': (MWG_integers, MWG_inch, MWG_SI, False), 

'BSWG': (BSWG_integers, BSWG_inch, BSWG_SI, True), 

'SSWG': (SSWG_integers, SSWG_inch, SSWG_SI, True)} 

 

 

def gauge_from_t(t, SI=True, schedule='BWG'): 

r'''Looks up the gauge of a given wire thickness of given schedule. 

Values are all non-linear, and tabulated internally. 

 

Parameters 

---------- 

t : float 

Thickness, [m] 

SI : bool, optional 

If False, value in inches is returned, rather than m. 

schedule : str 

Gauge schedule, one of 'BWG', 'AWG', 'SWG', 'MWG', 'BSWG', or 'SSWG' 

 

Returns 

------- 

gauge : float-like 

Wire Gauge, [] 

 

Notes 

----- 

An internal variable, tol, is used in the selection of the wire gauge. If 

the next smaller wire gauge is within 10% of the difference between it and 

the previous wire gauge, the smaller wire gauge is selected. Accordingly, 

this function can return a gauge with a thickness smaller than desired 

in some circumstances. 

 

Birmingham Wire Gauge (BWG) ranges from 0.2 (0.5 inch) to 36 (0.004 inch). 

 

American Wire Gauge (AWG) ranges from 0.167 (0.58 inch) to 51 (0.00099 

inch). These are used for electrical wires. 

 

Steel Wire Gauge (SWG) ranges from 0.143 (0.49 inch) to 51 (0.0044 inch). 

Also called Washburn & Moen wire gauge, American Steel gauge, Wire Co. 

gauge, and Roebling wire gauge. 

 

Music Wire Gauge (MWG) ranges from 0.167 (0.004 inch) to 46 (0.18 

inch). Also called Piano Wire Gauge. 

 

British Standard Wire Gage (BSWG) ranges from 0.143 (0.5 inch) to 

51 (0.001 inch). Also called Imperial Wire Gage (IWG). 

 

Stub's Steel Wire Gage (SSWG) ranges from 1 (0.227 inch) to 80 (0.013 inch) 

 

Examples 

-------- 

>>> gauge_from_t(.5, SI=False, schedule='BWG') 

0.2 

 

References 

---------- 

.. [1] Oberg, Erik, Franklin D. Jones, and Henry H. Ryffel. Machinery's 

Handbook. Industrial Press, Incorporated, 2012. 

''' 

tol = 0.1 

# Handle units 

if SI: 

t_inch = round(t/inch, 9) # all schedules are in inches 

else: 

t_inch = t 

 

# Get the schedule 

try: 

sch_integers, sch_inch, sch_SI, decreasing = wire_schedules[schedule] 

except: 

raise ValueError('Wire gauge schedule not found') 

 

# Check if outside limits 

sch_max, sch_min = sch_inch[0], sch_inch[-1] 

if t_inch > sch_max: 

raise ValueError('Input thickness is above the largest in the selected schedule') 

 

 

# If given thickness is exactly in the index, be happy 

if t_inch in sch_inch: 

gauge = sch_integers[sch_inch.index(t_inch)] 

 

else: 

for i in range(len(sch_inch)): 

if sch_inch[i] >= t_inch: 

larger = sch_inch[i] 

else: 

break 

if larger == sch_min: 

gauge = sch_min # If t is under the lowest schedule, be happy 

else: 

smaller = sch_inch[i] 

if (t_inch - smaller) <= tol*(larger - smaller): 

gauge = sch_integers[i] 

else: 

gauge = sch_integers[i-1] 

return gauge 

 

 

def t_from_gauge(gauge, SI=True, schedule='BWG'): 

r'''Looks up the thickness of a given wire gauge of given schedule. 

Values are all non-linear, and tabulated internally. 

 

Parameters 

---------- 

gauge : float-like 

Wire Gauge, [] 

SI : bool, optional 

If False, value in inches is returned, rather than m. 

schedule : str 

Gauge schedule, one of 'BWG', 'AWG', 'SWG', 'MWG', 'BSWG', or 'SSWG' 

 

Returns 

------- 

t : float 

Thickness, [m] 

 

Notes 

----- 

Birmingham Wire Gauge (BWG) ranges from 0.2 (0.5 inch) to 36 (0.004 inch). 

 

American Wire Gauge (AWG) ranges from 0.167 (0.58 inch) to 51 (0.00099 

inch). These are used for electrical wires. 

 

Steel Wire Gauge (SWG) ranges from 0.143 (0.49 inch) to 51 (0.0044 inch). 

Also called Washburn & Moen wire gauge, American Steel gauge, Wire Co. 

gauge, and Roebling wire gauge. 

 

Music Wire Gauge (MWG) ranges from 0.167 (0.004 inch) to 46 (0.18 

inch). Also called Piano Wire Gauge. 

 

British Standard Wire Gage (BSWG) ranges from 0.143 (0.5 inch) to 

51 (0.001 inch). Also called Imperial Wire Gage (IWG). 

 

Stub's Steel Wire Gage (SSWG) ranges from 1 (0.227 inch) to 80 (0.013 inch) 

 

Examples 

-------- 

>>> t_from_gauge(.2, False, 'BWG') 

0.5 

 

References 

---------- 

.. [1] Oberg, Erik, Franklin D. Jones, and Henry H. Ryffel. Machinery's 

Handbook. Industrial Press, Incorporated, 2012. 

''' 

try: 

sch_integers, sch_inch, sch_SI, decreasing = wire_schedules[schedule] 

except: 

raise ValueError('Wire gauge schedule not found') 

 

try: 

i = sch_integers.index(gauge) 

except: 

raise ValueError('Input gauge not found in selected schedule') 

if SI: 

t = sch_SI[i] 

else: 

t = sch_inch[i] 

return t