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Welded Tube Sizes

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Welded Tube Sizes
Manisha Steel Centre

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Check ERW Steel Tube Standard Sizes and BWG Gauge Chart

ERW Steel Tube Standard Sizes
Tube O.D (INCH) Tube O.D (MM) Wall Thickness (INCH) Wall Thickness (MM) BWG
0.250 6.35 0.020 0.51 -
0.028 0.71  22
0.035 0.89  20
0.049 1.25  18
0.065 1.65  16
1.375 34.93 0.035 0.89  20
1.125 28.58 0.065 1.65  16
1.875 47.63 0.065 1.65  16
0.188 4.78 0.035 0.89  20
0.313 7.95 0.035 0.89  20
0.049 1.25  18
0.375 9.53 0.028 0.71  22
0.035 0.89  20
0.049 1.25  18
0.065 1.65  16
0.500 12.7 0.035 0.89  20
0.049 1.25  18
0.650 1.65  16
0.750 19.05 0.035 0.89  20
0.049 1.25  18
0.065 1.65  16
0.083 2.11  14
0.120 3.05  11
0.625 15.88 0.035 0.89  20
0.049 1.25  18
0.065 1.65  16
1.000 25.4 0.035 0.89  20
0.049 1.25  18
0.065 1.65  16
0.083 2.11  14
0.095 2.41  13
0.120 3.05  11
0.875 22.23 0.035 0.89  20
0.049 1.25  18
0.065 1.65  16
0.120 3.05  11
1.750 44.45 0.035 0.89  20
0.065 1.65  16
0.083 2.11  14
1.250 31.75 0.065 1.65  16
0.083 2.11  14
0.120 3.05  11
1.5000 38.1 0.049 1.25  18
0.065 1.65  16
0.083 2.11  14
0.120 3.05  11
2.500 63.5 0.065 1.65  16
0.083 2.11  14
0.120 3.05  11
6.000 152.4 0.065 1.65  16
0.083 2.11  14
0.120 3.05  11
2.000 50.8 0.049 1.25  18
0.065 1.65  16
0.083 2.11  14
0.120 3.05  11
2.125 53.98 0.065 1.65  16
2.250 57.15 0.065 1.65  16
0.083 2.11  14
0.120 3.05  11
4.000 101.6 0.065 1.65  16
0.083 2.11  14
2.750 69.85 0.065 1.65  16
5.000 127 0.065 1.65  16
0.083 2.11  14
0.120 3.05  11
0.188 4.78 -
3.000 76.2 0.049 1.25  18
0.065 1.65  16
0.083 2.11  14
0.120 3.05  11
3.250 82.55 0.065 1.65  16
0.120 3.05  11
3.500 88.9 0.065 1.65  16
4.250 108 0.120 3.05  11
4.500 114.3 0.065 1.65  16
8.000 203.2 0.120 3.05  11
Welded Tubing BWG Gauge Chart
BWG in mm
3 0.259 6.58
4 0.238 6.05
5 0.22 5.59
6 0.203 5.16
12 0.109 2.77
13 0.095 2.41
14 0.083 2.11
10 0.134 3.4
11 0.12 3.05
20 0.035 0.89
31 0.01 0.254
1 0.3 7.62
32 0.009 0.229
33 0.008 0.203
21 0.031 0.81
7 0.179 4.57
8 0.164 4.19
36 0.004 0.102
26 0.018 0.46
34 0.007 0.178
27 0.016 0.41
25 0.02 0.51
23 0.025 0.64
24 0.023 0.56
35 0.005 0.127
28 0.0135 0.356
29 0.013 0.33
30 0.012 0.305
16 0.065 1.65
17 0.058 1.47
18 0.049 1.24
19 0.042 1.07
22 0.028 0.71
15 0.072 1.83
2 0.283 7.21
9 0.147 3.76

Refer Welded Square Tube Dimensions

Welded Square Tube Dimensions
Welded Square Tube Dimensions
External  Dimensions Wall  Thickness  Mm
A  X  A  Mm 5 4 3 2,5 2 1,5 1,2 1
10  X  10 - - - - - 0,422 0,347 0,294
15  X  15 - - - - 0,857 0,661 0,538 0,453
16  X  16 - - - - 0,921 0,709 0,576 0,485
20  X  20 - - - - 1,176 0,901 0,729 0,613
25  X  25 - - 2,167 1,837 1,495 1,140 0,921 0,772
30  X  30 - - 2,645 2,236 1,814 1,379 1,112 0,932
35  X  35 - - 3,124 2,635 2,133 1,618 1,304 1,091
40  X  40 - 4,703 3,602 3,033 2,452 1,858 1,495 1,251
45  X  45 - 5,341 4,081 3,432 2,771 2,097 1,686 1,410
50  X  50 7,349 5,979 4,559 3,831 3,090 2,336 1,878 -
60  X  60 8,943 7,255 5,516 4,628 3,728 2,814 - -
70  X  70 10,538 8,531 6,473 5,426 4,366 3,293 - -
80  X  80 12,133 9,807 7,430 6,223 5,004 3,771 - -
100  X  100 15,323 12,359 9,344 7,818 6,279 4,728 - -
120  X  120 18,513 14,910 11,258 9,413 7,555 - - -
150  X  150 23,298 18,738 14,129 11,805 9,469 - - -
200  X  200 31,272 25,118 18,913 15,793 12,659 - - -
250  X  250 39,247 31,497 23,698 - - - - -
Welded Round Tube Weight Chart
Outside Diameter, mm Wall Thickness, mm Weight, kg/m
6   1   0,123  
8   1   0,173  
10   1   0,222  
12   1   0,272  
13   1   0,296  
14   1   0,321  
15   1   0,346  
16   1   0,370  
17,2   1   0,400  
18   1   0,420  
19,05   1   0,446  
20   0,8   0,379  
21,3   1   0,501  
22   0,8   0,419  
23   1,5   0,796  
25   0,8   0,478  
25,4   1   0,603  
26,9   1,2   0,762  
28   1   0,667  
29   1,5   1,019  
30   1   0,716  
32   1   0,765  
33   1,5   1,167  
33,7   3,2   2,410  
34   1   0,815  
35   1   0,840  
38,1   1   0,916  
40   1   0,963  
41   1,5   1,463  
42   1,5   1,500  
42,4   1,2   1,221  
43   1,5   1,537  
44,5   1,2   1,283  
45   1,2   1,298  
48,3   1,2   1,396  
50   1   1,210  
50,8   1   1,230  
51   1   1,235  
52   1   1,259  
53   1,5   1,908  
54   1,2   1,565  
57   1,2   1,653  
60,3   1,2   1,751  
63,5   1,2   1,846  
70   1,2   2,039  
73   1,5   2,648  
76,1   1,2   2,219  
80   1,2   2,335  
83   1,5   3,019  
84   2   4,050  
85   1,5   3,093  
88,9   5   10,359  
101,6   4   9,640  
103   1,5   3,760  
104   2   5,037  
108   1,5   3,945  
114,3   1,5   4,178  
127   1,5   4,648  
128   1,5   4,685  
129   1,5   4,723  
139,7   1,5   5,119  
153   1,5   5,611  
154   2   7,507  
155   2,5   9,414  
156   3   11,334  
159   4   15,310  
168,3   2   8,213  
203   1,5   7,463  
204   2   9,976  
205   2,5   12,501  
206   3   15,038  
219,1   4   21,246  
254   2   12,445  
255   2,5   15,587  
256   3   18,742  
273   4   26,570  
304   2   14,915  
306   3   22,446  
323,9   2   15,897  
354   2   17,384  
355,6   3   26,120  
406,4   3   29,883  

Find Here Welded Rectangular and Oval Tube Dimensions

Welded Rectangular Tubing Dimensions
External  Dimensions Wall  Thickness  mm
A  X  B  Mm 5 4 3 2,5 2 1,5 1,2 1
20  X  15 - - - - 1,016 0,781 0,634 0,533
20  X  10 - - - - - 0,661 0,538 0,453
25  X  15 - - - - 1,176 0,901 0,729 0,613
25  X  10 - - - - 1,016 0,781 0,634 0,533
30  X  15 - - - - 1,335 1,020 0,825 0,693
30  X  10 - - - - 1,176 0,901 0,729 0,613
30  X  20 - - 2,167 1,837 1,495 1,140 0,921 0,772
35  X  20 - - 2,406 2,036 1,654 1,259 1,017 0,852
40  X  15 - - 2,406 2,036 1,654 1,259 1,017 0,852
40  X  27 - - 2,980 2,515 2,037 1,547 1,246 1,044
40  X  30 - - 3,124 2,635 2,133 1,618 1,304 1,091
40  X  20 - - 2,645 2,236 1,814 1,379 1,112 0,932
40  X  10 - - 2,167 1,837 1,495 1,140 0,921 0,772
50  X  20 - - 3,124 2,635 2,133 1,618 1,304 1,091
50  X  25 - - 3,363 2,834 2,292 1,738 1,399 1,171
50  X  30 - - 3,602 3,033 2,452 1,858 1,495 1,251
50  X  40 - - 4,081 3,432 2,771 2,097 1,686 1,410
60  X  10 - - 3,124 2,635 2,133 1,618 1,304 1,091
50  X  10 - - 2,645 2,236 1,814 1,379 1,112 0,932
60  X  30 - - 4,081 3,432 2,771 2,097 1,686 1,410
60  X  40 - 5,979 4,559 3,831 3,090 2,336 - -
70  X  20 - 5,341 4,081 3,432 2,771 2,097 - -
70  X  40 - 6,617 5,038 4,229 3,409 2,575 - -
80  X  20 - 5,979 4,559 3,831 3,090 2,336 - -
80  X  30 - 6,617 5,038 4,229 3,409 2,575 - -
80  X  40 8,943 7,255 5,516 4,628 3,728 2,814 - -
80  X  50 9,741 7,893 5,995 5,027 4,047 3,054 - -
100  X  40 10,538 8,531 6,473 5,426 4,366 3,293 - -
100  X  60 12,133 9,807 7,430 6,223 5,004 3,771 - -
100  X  80 13,728 11,083 8,387 7,021 5,641 4,250 - -
120  X  60 13,728 11,083 8,387 7,021 5,641 4,250 - -
150  X  50 15,323 12,359 9,344 7,818 6,279 - - -
60  X  20 - - 3,602 3,033 2,452 1,858 1,495 1,251
200  X  100 23,298 18,738 14,129 11,805 9,469 - - -
120  X  80 15,323 12,359 9,344 7,818 6,279 4,728 - -
100  X  50 11,336 9,169 6,952 5,824 4,685 3,532 - -
150  X  100 19,310 15,548 11,736 9,812 7,874 - - -
160  X  80 18,513 14,910 11,258 9,413 7,555 - - -
120  X  40 12,133 9,807 7,430 6,223 5,004 3,771 - -
80  X  60 10,538 8,531 6,473 5,426 4,366 3,293 - -
Welded Oval Tubing Dimensions
Welded Oval Tubing Dimensions
Width (A*B) Wall Thickness (mm)
7*25 0.5-1.5
8*15 0.5-1.5
9.5*29.5 0.5-1.5
10*20 0.5-1.5
12*23 0.5-1.5
13.5*27 0.5-1.5
14*58 0.5-2.0
15*25 0.5-1.5
15.6*28.6 0.5-1.5
15*30 0.5-1.5
19*38 0.5-1.5
20*50 0.5-2.0
22*31 0.5-1.5
25*65 0.5-2.0
25*65 0.5-2.0
25*45 0.5-2.0
25*55 0.5-2.0
30*102 0.5-2.0
30*102 0.5-2.0
30*60 0.5-2.0
35*78 0.5-2.0
40*75 0.5-2.0
40*96 0.5-2.0
50*150 1.0-5.0
50*150 1.0-5.0
50*110 1.0-5.0
55*128 1.0-5.0
63*133 1.0-5.0
100’195 1.0-5.0
Understand Difference Between Welded Tube vs Seamless
Welded Tube vs Seamless Tube
Property Welded Tube Seamless Tube
Manufacturing Process Welded from metal strip Extruded from solid billet
Seam Has a welded seam No seam
Strength Lower (approx. 10-20% weaker) Higher (approx. 20-30% stronger)
Wall Thickness Varies widely (from 0.5 mm to >100 mm) More consistent (usually 1-50 mm)
Cost Lower (20-40% cheaper) Higher (30-50% more expensive)
Pressure Resistance Medium (up to 50-70 bar) High (up to 150-200 bar)
Customization High (varied sizes) Moderate (limited by extrusion process)
Common Applications Automotive, Furniture, Low-pressure Oil & Gas, Aerospace, High-pressure
Production Speed Fast (continuous process) Slow (due to extrusion)
Surface Finish Visible weld seam Smooth, no seam
Must View Welded Tubing Weight Chart Here
Welded Tubing Weight Chart
Wall Thickness mm
Ø Outside mm 0,8 1 1,2 1,5 1,6 2,0 2,5 2,6 3 3,2 3,6> 4 5
12 - 0,224 0,275 0,325 0,394 0,417 - - - - - - - -
13 - 0,244 0,3 0,355 0,432 - - - - - - - - -
19 - 0,365 0,451 0,535 0,657 0,697 0,851 1,033 1,068 - - - - -
20 - 0,385 0,476 0,565 0,695 0,737 0,901 1,096 1,133 - - - - -
21,3 1/2″ 0,411 0,508 0,604 0,744 0,789 0,967 1,177 1,217 - - - - -
22 - 0,425 0,526 0,625 0,77 0,817 1,002 1,221 1,263 - - - - -
23 - 0,445 0,551 0,655 0,808 0,857 1,052 1,283 1,328 - - - - -
25 - 0,485 0,601 0,715 0,883 0,937 1,152 1,409 1,458 1,653 - - - -
14 - 0,264 0,326 0,385 0,47 0,497 0,601 - - - - - - -
15 - 0,284 0,351 0,415 0,507 0,537 0,651 - - - - - - -
16 - 0,304 0,376 0,445 0,545 0,577 0,701 - - - - - - -
17,2 3/8″ 0,329 0,406 0,481 0,59 0,625 0,761 0,92 0,951 - - - - -
18 - 0,345 0,426 0,505 0,62 0,657 0,801 0,97 1,003 - - - - -
25,4 - 0,493 0,611 0,727 0,898 0,954 1,172 1,434 1,484 1,683 - - - -
19,05 - 0,366 0,452 0,536 0,659 0,699 0,854 1,036 1,071 - - - - -
35 - 0,685 0,851 1,016 1,258 1,338 1,653 2,035 2,109 2,404 2,548 - - -
38 - 0,745 0,926 1,106 1,371 1,458 1,803 2,222 2,305 2,629 2,788 - - -
38,1 - 0,747 0,929 1,109 1,375 1,462 1,808 2,229 2,311 2,637 2,796 - - -
40 - 0,785 0,977 1,166 1,446 1,538 1,903 2,348 2,435 2,779 2,949 - - -
42 - 0,825 1,027 1,226 1,521 1,619 2,003 2,473 2,565 2,93 3,109 - - -
30 - 0,585 0,726 0,865 1,07 1,138 1,402 1,722 1,784 2,028 2,147 - - -
31,8 - 0,621 0,771 0,919 1,138 1,21 1,492 1,834 1,901 2,163 2,292 - - -
32 - 0,625 0,776 0,925 1,146 1,218 1,502 1,847 1,914 2,178 2,308 - - -
6 - 0,104 0,125 - - - - - - - - - - -
10 - 0,184 0,225 0,264 0,319 0,337 - - - - - - - -
33 - 0,645 0,801 0,956 1,183 1,258 1,552 1,909 1,979 2,254 2,388 - - -
33,7 1″ 0,659 0,819 0,977 1,209 1,286 1,588 1,953 2,025 2,306 2,444 - - -
34 - 0,665 0,826 0,986 1,221 1,298 1,603 1,972 2,044 2,329 2,468 - - -
26,9 3/4″ 0,523 0,649 0,772 0,954 1,014 1,247 1,527 1,582 1,795 - - - -
28 - 0,545 0,676 0,805 0,995 1,058 1,302 1,596 1,654 1,878 - - - -
42,4 1″1/4 0,833 1,037 1,238 1,536 1,635 2,023 2,498 2,591 2,96 3,141 - - -
45 - 0,885 1,102 1,316 1,634 1,739 2,153 2,661 2,76 3,155 3,349 - - -
48,3 1″ 1/2 0,952 1,184 1,415 1,758 1,871 2,319 2,867 2,975 3,403 3,614 - - -
51 - 1,006 1,252 1,496 1,859 1,979 2,454 3,036 3,151 3,606 3,83 - - -
52 - 1,026 1,277 1,526 1,897 2,019 2,504 3,099 3,216 3,681 3,91 - - -
53 - 1,046 1,302 1,556 1,934 2,059 2,554 3,161 3,281 3,756 3,99 - - -
114,3 4″ - - 3,398 4,237 4,515 5,624 6,999 7,272 8,361 8,902 9,979 11,048 13,684
129 4″1/2 - - - 4,789 5,104 6,36 7,919 8,229 9,465 10,08 11,304 12,52 15,525
139,7 5″ - - - 5,191 5,533 6,896 8,589 8,926 10,269 10,937 12,269 13,592 16,864
70 - - - 2,067 2,573 2,74 3,405 4,226 4,388 5,033 5,353 5,986 6,611 -
73 - - - 2,157 2,686 2,861 3,556 4,413 4,583 5,258 5,593 6,256 6,911 -
76,1 2″ 1/2 - - 2,251 2,802 2,985 3,711 4,607 4,785 5,491 5,841 6,535 7,222 -
43 - 0,845 1,052 1,256 1,559 1,659 2,053 2,535 2,63 3,005 3,189 - - -
44,5 - 0,875 1,089 1,301 1,615 1,719 2,128 2,629 2,728 3,117 3,309 - - -
108 - - - 3,209 4 4,263 5,308 6,604 6,862 7,888 8,397 9,411 10,417 12,896
88,9 3″ - - 2,635 3,283 3,498 4,352 5,409 5,618 6,453 6,867 7,689 8,504 -
100 - - - 2,969 3,7 3,942 4,908 6,104 6,341 7,287 7,756 8,69 9,615 -
154 - - - - - - 7,612 9,484 9,857 11,343 12,083 13,558 15,024 18,655
168,3 6″ - - - - - 8,328 10,379 10,788 12,417 13,229 14,847 16,456 20,445
204 - - - - - - 10,116 12,614 13,112 15,099 16,09 18,065 20,032 24,915
54 - 1,066 1,327 1,587 1,972 2,099 2,604 3,224 3,346 3,831 4,071 - - -
56,5 - 1,116 1,39 1,662 2,066 2,2 2,729 3,38 3,509 4,019 4,271 4,769 - -
66,6 - 1,318 1,643 1,965 2,445 2,604 3,235 4,013 4,167 4,778 5,08 5,679 6,27 -
80 - - - 2,368 2,948 3,141 3,906 4,852 5,039 5,784 6,154 6,887 7,612 -
83 - - - 2,458 3,061 3,261 4,056 5,039 5,234 6,01 6,394 7,157 7,913 -
84 - - - 2,488 3,099 3,301 4,107 5,102 5,299 6,085 6,474 7,248 8,013 -
57 - 1,126 1,402 1,677 2,085 2,22 2,574 3,412 3,542 4,056 4,311 4,814 - -
58,2 - 1,15 1,432 1,713 2,13 2,268 2,814 3,487 3,62 4,147 4,407 4,922 - -
60 - 1,186 1,477 1,767 2,197 2,34 2,905 3,6 3,737 4,282 4,551 5,084 5,609 -
60,3 2″ 1,192 1,485 1,776 2,209 2,352 2,92 3,618 3,757 4,304 4,575 5,111 5,639 -
63,5 - 1,256 1,565 1,872 2,329 2,48 3,08 3,819 3,965 4,545 4,832 5,4 5,96 -
8 - 0,144 0,175 - - - - - - - - - - -
50 - 0,986 1,227 1,466 1,822 1,939 2,404 2,974 3,086 3,531 3,75 - - -
50,8 - 1,002 1,247 1,49 1,852 1,971 2,444 3,024 3,138 3,591 3,814 - - -
64 - 1,266 1,578 1,887 2,348 2,5 3,105 3,85 3,997 4,582 4,872 5,445 6,01 -
85 - - - 2,518 3,136 3,341 4,157 5,165 5,365 6,16 6,554 7,338 8,113 -
104 - - - 3,089 3,85 4,103 5,108 6,354 6,602 7,587 8,077 9,05 10,016 12,395
101,6 3″1/2 - - 3,017 3,76 4,006 4,988 6,204 6,445 7,407 7,885 8,834 9,776 -
219,1 8″ - - - - - 10,872 13,559 14,095 16,233 17,3 19,426 21,544 26,805
Size Chart of Welded Coil Tubing
OD, Inch OD, mm WT, Inch WT, mm
1 25.4 0.065 1.65
1 25.4 0.083 2.11
1 25.4 0.035 0.89
1 25.4 0.049 1.24
1/2 12.7 0.049 1.24
1/2 12.7 0.065 1.65
1/2 12.7 0.035 0.89
1/2 12.7 0.083 2.11
1/4 6.35 0.035 0.89
1/4 6.35 0.049 1.24
1/4 6.35 0.065 1.65
1/4 6.35 0.028 0.71
3/4 19.05 0.049 1.24
3/4 19.05 0.065 1.65
3/4 19.05 0.035 0.89
3/4 19.05 0.083 2.11
3/8 9.53 0.049 1.24
3/8 9.53 0.028 0.71
3/8 9.53 0.035 0.89
3/8 9.53 0.065 1.65
5/8 15.88 0.035 0.89
5/8 15.88 0.049 1.24
5/8 15.88 0.065 1.65
5/8 15.88 0.083 2.11
3/16 4.76 0.028 0.71
3/16 4.76 0.035 0.89
5/16 7.94 0.028 0.71
5/16 7.94 0.035 0.89
5/16 7.94 0.049 1.24
5/16 7.94 0.065 1.65
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