Aluminum Seamless Bus Pipe Products

WMWA enables companies to fulfill their project requirements with a wide selection of excellent quality aluminum bus pipe products. Aluminum is critical to a diverse range of applications in industries ranging from transportation, electronics, and construction, to packaging, household items, and recreational products.

Our aluminum pipe products are available in various sizes, and we are also able to accommodate custom orders. Simply send us your component specifications, and we will be glad to help you bring your design to life.

At WMWA, quality is of utmost priority. All our locations carry ISO/9001 certification, and all employees undergo ongoing training to meet the exacting needs of our customers.

We are also committed to helping customers meet their deadlines. With our just in time delivery system and eight locations nationwide, we help customers maintain timely projects.

Aluminum Bus Pipe - Seamless & Structural
6101-T6 or 6063-T6
SCHEDULE 40 - Nominal Dimensions SCHEDULE 80 - Nominal Dimensions
INCHES O.D I.D WALL WT/FT
1/2 0.84 0.622 0.109 0.294
3/4 1.05 0.824 0.113 0.391
1 1.315 1.049 0.133 0.581
1 1/4 1.66 1.38 0.014 0.786
1 1/2 1.9 1.61 0.145 0.94
2 2.375 2.067 0.154 1.264
2 1/2 2.875 2.469 0.203 2.004
3 3.5 3.068 0.216 2.621
3 1/2 4 3.548 0.226 3.151
4 4.5 4.026 0.237 3.733
5 5.563 5.047 0.258 5.057
6 6.625 6.065 0.28 6.564
8 8.625 7.981 0.322 9.878
         
INCHES O.D I.D WALL WT/FT
1/2 0.84 0.546 0.147 0.376
3/4 1.05 0.742 0.154 0.51
1 1.315 0.957 0.179 0.751
1 1/4 1.66 1.278 0.191 1.037
1 1/2 1.9 1.5 0.2 1.256
2 2.375 1.939 0.218 1.737
2 1/2 2.875 2.323 0.276 2.65
3 3.5 2.9 0.3 3.547
3 1/2 4 3.364 0.318 4.326
4 4.5 3.826 0.337 5.183
5 5.563 4.813 0.375 7.188
6 6.625 5.761 0.432 9.884
8 8.625 7.625 0.5 15.01
         
Stock Lengths: 20', 30', 40'
Special Order Lengths available up to 50'
Special sizes of bus pipe produced to order.
Bus packaging available.

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.

Aluminum Bus Pipe - Physical and Electrical Properties
6063-T6
SCHEDULE 40 PIPE
INCHES O.D WALL AREA WEIGHT LBS/FT
1 1.315 0.133 0.494 0.581
1 1/4 1.660 0.140 0.669 0.786
1 1/2 1.900 0.145 0.800 0.940
2 2.375 0.154 1.075 1.264
2 1/2 2.875 0.203 1.704 2.004
3 3.500 0.216 2.228 2.621
3 1/2 4.000 0.226 2.680 3.151
4 4.500 0.237 3.174 3.733
4 1/2 5.001 0.247 3.688 4.337
5 5.563 0.258 4.300 5.057
6 6.625 0.280 5.581 6.564
SCHEDULE 80 PIPE
INCHES O.D WALL AREA WEIGHT LBS/FT
1 1.315 0.179 0.639 0.751
1 1/4 1.660 0.191 0.882 1.037
1 1/2 1.900 0.200 1.068 1.256
2 2.375 0.218 1.477 1.737
2 1/2 2.875 0.276 2.254 2.650
3 3.500 0.300 3.016 3.547
3 1/2 4.000 0.318 3.678 4.326
4 4.500 0.337 4.407 5.183
4 1/2 5.001 0.355 5.180 6.092
5 5.563 0.375 6.112 7.188
6 6.625 0.432 8.405 9.844
 
I.R. DC RES 60Hz RAC/RDC AC RES CURR RATINGS
68.24 31.120 1.00039 36.580 681
62.68 22.990 1.00050 27.030 859
59.45 19.220 1.00064 22.600 984
54.15 14.300 1.00082 16.820 1234
49.85 9.019 1.00220 10.620 1663
45.19 6.897 1.00300 8.126 2040
42.05 5.736 1.00380 6.761 2347
39.28 4.842 1.00470 5.712 2664
36.81 4.167 1.00570 4.920 2984
34.31 3.574 1.00680 4.224 3348
30.23 2.754 1.00950 3.263 4064
 
I.R. DC RES 60Hz RAC/RDC AC RES CURR RATINGS
68.81 24.060 1.00100 28.300 774
63.14 17.440 1.00140 20.520 985
59.89 14.390 1.00200 16.940 1137
54.56 10.400 1.00280 12.260 1446
50.23 6.820 1.00720 8.071 1907
45.55 5.096 1.01030 6.050 2363
42.39 4.178 1.01380 4.972 2735
39.61 3.487 1.01710 4.168 3118
37.13 2.967 1.02100 3.559 3505
34.63 2.515 1.02600 3.032 3949
30.58 1.829 1.04570 2.247 4891
1. Current ratings listed in the Tables are based on 30C temperature rise over 40C 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
Aluminum Bus Pipe - Physical and Electrical Properties
6061-T6
SCHEDULE 40 PIPE
INCHES O.D WALL AREA WEIGHT LBS/FT
1 1.315 0.133 0.494 0.581
1 1/4 1.660 0.140 0.669 0.786
1 1/2 1.900 0.145 0.800 0.940
2 2.375 0.154 1.075 1.264
2 1/2 2.875 0.203 1.704 2.004
3 3.500 0.216 2.228 2.621
3 1/2 4.000 0.226 2.680 3.151
4 4.500 0.237 3.174 3.733
4 1/2 5.001 0.247 3.688 4.337
5 5.563 0.258 4.300 5.057
6 6.625 0.280 5.581 6.564
SCHEDULE 80 PIPE
INCHES O.D WALL AREA WEIGHT LBS/FT
1 1.315 0.179 0.639 0.751
1 1/4 1.660 0.191 0.882 1.037
1 1/2 1.900 0.200 1.068 1.256
2 2.375 0.218 1.477 1.737
2 1/2 2.875 0.276 2.254 2.650
3 3.500 0.300 3.016 3.547
3 1/2 4.000 0.318 3.678 4.326
4 4.500 0.337 4.407 5.183
4 1/2 5.001 0.355 5.180 6.092
5 5.563 0.375 6.112 7.188
6 6.625 0.432 8.405 9.844
 
I.R. DC RES 60Hz RAC/RDC AC RES CURR RATINGS
68.24 38.360 1.00032 43.820 622
62.68 28.340 1.00039 32.370 705
59.45 23.690 1.00046 27.070 900
54.15 17.630 1.00055 20.140 1128
49.85 11.170 1.00150 12.710 1520
45.19 8.500 1.00180 9.725 1865
42.05 7.070 1.00220 8.091 2145
39.28 5.968 1.00270 6.834 2436
36.81 5.136 1.00330 5.885 2728
34.31 4.406 1.00400 5.051 3063
30.23 3.394 1.00540 3.897 3719
 
I.R. DC RES 60Hz RAC/RDC AC RES CURR RATINGS
68.81 29.650 1.00075 33.840 707
63.14 21.490 1.00105 24.570 901
59.89 17.730 1.00150 20.280 1039
54.56 12.820 1.00210 14.670 1322
50.23 8.406 1.00390 9.647 1746
45.55 6.281 1.00490 7.225 2199
42.39 5.150 1.00750 5.935 2507
39.61 4.298 1.00950 4.965 2862
37.13 3.657 1.01160 4.236 3221
34.63 3.099 1.01650 3.604 3631
30.58 2.254 1.02120 2.656 4532
1. Current ratings listed in the Tables are based on 30C temperature rise over 40C 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