Aluminum Seamless Bus Pipe

Seamless bus pipe is an extruded tubular product used to convey electricity. It is manufactured to a “nominal,” not actual, inside diameter. The wall thickness is described by a “schedule.”

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© 2011, AFL, all rights reserved. PP-3-00213, Revision 3, 8.9.2022 Specifications are subject to change without notice. AFLglobal.com | 800.890.8878 648 Bus Conductors Bus Conductors Seamless Bus Pipe Nominal Size Outside Diameter of Tube Wall Thickness Area Weight in. in. in. sq. in. lb/ft SCH 40 A B 1 1.315 0.133 0.4939 0.581 1 1/4 1.660 0.140 0.6685 0.786 1 1/2 1.900 0.145 0.7995 0.940 2 2.375 0.154 1.0750 1.264 2 1/2 2.875 0.203 1.7040 2.004 3 3.500 0.216 2.2280 2.621 3 1/2 4.000 0.226 2.6800 3.151 4 4.500 0.237 3.1740 3.733 5 5.563 0.258 4.3000 5.057 6 6.625 0.280 5.5810 6.564 8 8.625 0.322 8.3990 9.879 Nominal Size Outside Diameter of Tube Wall Thickness Area Weight in. in. in. sq. in. lb/ft SCH 80 A B 1 1.315 0.179 0.6388 0.751 1 1/4 1.660 0.191 0.8815 1.037 1 1/2 1.900 0.200 1.0680 1.256 2 2.375 0.218 1.4770 1.737 2 1/2 2.875 0.276 2.2540 2.650 3 3.500 0.300 3.0160 3.547 3 1/2 4.000 0.318 3.6780 4.326 4 4.500 0.337 4.4070 5.183 5 5.563 0.375 6.1120 7.188 6 6.625 0.432 8.4050 9.884 8 8.625 0.500 12.763 15.009 Seamless bus pipe is an extruded tubular product used to convey electricity. It is manufactured to a “nominal,” not actual, inside diameter. The wall thickness is described by a “schedule.” The schedules are determined by the American Standards Association. Seamless bus pipe is generally made of 6063-T6 alloy in ANSI Schedule 40 pipe because of its excellent mechanical and electrical properties. 6061-T6 alloy tubular bus is used where high strength and lower conductivity are required. Specification: B-241 (Seamless Pipe) Note: For seamless bus tubing over 6 inches, see page 618. Schedule 40 Schedule 80 Nominal Size Size Code 1 100 1 1/4 125 1 1/2 150 2 200 2 1/2 250 3 300 3 1/2 350 4 400 5 500 6 600 8 800 Step 1: Choose Nominal Size Step 2: Choose Schedule Schedule Number Schedule Code SCH 40 S40 SCH 80 S80 Step 3: Choose Alloy Alloy Number Alloy Code 6061 X 6063 Y 6101 Z Ordering Instructions: Step 4: Choose Temper Temper Temper Code T6 T6 T61 T61 T63 T63 Step 6: Build Catalog Number Size Code + Schedule Code + Alloy Code + Temper + Package Code Example: To order 2 1/2 inch Schedule 40 6101 T-61 Alloy Bus Pipe with BBB packaging 250 + S40 + Z + T61 + B Completed Catalog Number is 250S40ZT61B. Step 5: Choose Packaging Package Type Package Code Bare - Bat - Bundle (BBB) B EHV E See pictures on page 3 B A 649 Bus Conductors © 2011, AFL, all rights reserved. PP-3-00213, Revision 3, 8.9.2022 Specifications are subject to change without notice. AFLglobal.com | 800.890.8878 Bus Conductors Nominal Size in A B Area sq in Weight lbs/ft Inductive reactance 1 ft spacing 60 Hz microhm/ ft 6063-T6 6061-T6 DC Resistance at 20 o C microhms/ ft 60 Hz Rac/RDC at 70 o C AC Resistance at 70 o C 60 Hz microhms/ft Current Ratings Amp at 60 Hz (1) (2) (3) (4) Outdoor DC Resistance at 20 o C microhms/ft 60 Hz Rac/RDC at 70 o C AC Resistance at 70 o C 60 Hz microhms/ft Current Ratings Amp at 60 Hz (1) (2) (3) (4) Outdoor Outside Diameter of Tube in Wall Thickness in Schedule 40 Pipe 1 1.315 0.133 0.494 0.581 68.24 31.120 1.00039 36.580 681 38.360 1.00032 43.820 622 1 1/4 1.660 0.140 0.669 0.786 62.68 22.990 1.00050 27.030 859 28.340 1.00039 32.370 705 1 1/2 1.900 0.145 0.800 0.940 59.45 19.220 1.00064 22.600 984 23.690 1.00046 27.070 900 2 2.375 0.154 1.075 1.264 54.15 14.300 1.00082 16.820 1234 17.630 1.00055 20.140 1128 2 1/2 2.875 0.203 1.704 2.004 49.85 9.019 1.00220 10.620 1663 11.170 1.00150 12.710 1520 3 3.500 0.216 2.228 2.621 45.19 6.897 1.00300 8.126 2040 8.500 1.00180 9.725 1865 3 1/2 4.000 0.226 2.680 3.151 42.05 5.736 1.00380 6.761 2347 7.070 1.00220 8.091 2145 4 4.500 0.237 3.174 3.733 39.28 4.842 1.00470 5.712 2664 5.968 1.00270 6.834 2436 5 5.563 0.258 4.300 5.057 34.31 3.574 1.00680 4.224 3348 4.406 1.00400 5.051 3063 6 6.625 0.280 5.581 6.564 30.23 2.754 1.00950 3.263 4064 3.394 1.00540 3.897 3719 8 8.625 0.322 8.399 9.879 24.39 1.830 1.0162 2.167 5434 2.257 1.0086 2.590 5047 Schedule 80 Pipe 1 1.315 0.179 0.639 0.751 68.81 24.060 1.00100 28.300 774 29.650 1.00075 33.840 707 1 1/4 1.660 0.191 0.882 1.037 63.14 17.440 1.00140 20.520 985 21.490 1.00105 24.570 901 1 1/2 1.900 0.200 1.068 1.256 59.89 14.390 1.00200 16.940 1137 17.730 1.00150 20.280 1039 2 2.375 0.218 1.477 1.737 54.56 10.400 1.00280 12.260 1446 12.820 1.00210 14.670 1322 2 1/2 2.875 0.276 2.254 2.650 50.23 6.820 1.00720 8.071 1907 8.406 1.00390 9.647 1746 3 3.500 0.300 3.016 3.547 45.55 5.096 1.01030 6.050 2363 6.281 1.00490 7.225 2199 3 1/2 4.000 0.318 3.678 4.326 42.39 4.178 1.01380 4.972 2735 5.150 1.00750 5.935 2507 4 4.500 0.337 4.407 5.183 39.61 3.487 1.01710 4.168 3118 4.298 1.00950 4.965 2862 5 5.563 0.375 6.112 7.188 34.63 2.515 1.02600 3.032 3949 3.099 1.01650 3.604 3631 6 6.625 0.432 8.405 9.884 30.58 1.829 1.04570 2.247 4891 2.254 1.02120 2.656 4532 8 8.625 0.500 12.763 15.009 24.12 1.204 1.095 1.467 6651 1.484 1.0388 1.739 6152 Physical & Electrical Properties of Aluminum Standard Pipe-Size Conductors at Typical Conductivities Notes: 1. Current ratings listed in the Tables are based on 30 o C temperature rise over 40 o C ambient horizontally mounted conductors, with spacing sufficient to eliminate proximity effects, generally assumed not to be significant if spacing is 18 in. or over. Conduction of heat by supporting structures and taps can appreciably affect the ratings. 2. Conductors with a 2ft/sec crosswind. Nominal oxidized surface (e=0.50) 3. Current Ratings for direct current are close to those of alternating current for all except the larger sizes; and for them, the increase for dc bus is about 1.5 percent. 4. NEMA Standard SG1-3.02 (7/13/60) lists current rating for tubes of 57%-61% IACS conductivity, but without stated emissivity factors. However, even after adjustment for the 53% IACS conductivity of 6063-T6 alloy (and 43% for 6061-T6 alloy), the ratings differ somewhat from those of this table.

Features:
- Only one-third the weight of copper
- Highly corrosion resistant
- Dissipates heat rapidly and evenly
- Very strong yet lightweight
- Easy to fabricate
- Conducts equivalent loads of electric power with one-half as much material weight as copper

Applications:

6061-T6 alloy used in high strength applications
6063-T6 alloy used in higher current carrying applications
Indoor or outdoor use

Seamless bus pipe is an extruded tubular product used to convey electricity. It is manufactured to a “nominal,” not actual, inside diameter. The wall thickness is described by a "schedule." The schedules are determined by the American Standards Association.

Seamless bus pipe is generally made of 6063-T6 alloy in ANSI Schedule 40 pipe because of its excellent mechanical and electrical properties. The 6061-T6 alloy tubular bus is used where high strength and lower conductivity are required.

Specification: B-241 (Seamless Pipe)

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