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Stockists And Suppliers Of High Quality
Heat Exchanger/Boiler Tubes To The
Process Industries

Call us on: +44 (0)191 587 1777

A Conversion Chart covering tube wall thickness detail for BWG/SWG Equivalents in inches and millimetres.

Size Conversion Chart

SWG   inches   mm
0   .324   8.230
1   .300   7.620
2   .276   7.010
3   .252   6.401
4   .232   5.893
5   .212   5.385
6   .192   4.877
7   .176   4.470
8   .160   4.064
9   .144   3.658
10   .128   3.251
11   .116   2.946
12   .104   2.642
13   .092   2.337
14   .080   2.032
15   .072   1.829
16   .064   1.626
17   .056   1.422
18   .048   1.219
19   .040   1.016
20   .036   0.914
21   .032   0.813
22   .028   0.711
23   .024   0.610
24   .022   0.559
25   .020   0.508
BWG   inches   mm
0   .340   8.636
1   .300   7.620
2   .284   7.213
3   .259   6.578
4   .238   6.045
5   .220   5.588
6   .203   5.516
7   .180   4.572
8   .165   4.190
9   .148   3.759
10   .134   3.403
11   .120   3.048
12   .109   2.768
13   .095   2.413
14   .083   2.108
15   .072   1.829
16   .065   1.651
17   .058   1.473
18   .049   1.244
19   .042   1.067
20   .035   0.889
21   .032   0.812
22   .028   0.711
23   .025   0.635
24   .022   0.559
25   .020   0.508

Our management system and procedures are accredited to ISO 9001:2008 by QMS International plc. The comprehensive quality assurance accreditations of our production mills ensure that the products supplied are fully in accordance with the highest industry standards.

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A Conversion Chart covering tube wall thickness detail for BWG/SWG Equivalents in inches and millimetres

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  • Heat Exchanger Fabrication/Repair Industry
  • Oil Refineries
  • Petrochemical/Chemical Plants
  • Fertiliser Production Plants
  • Power Generating Stations
  • Steel Production Plant Furnaces and cooling sections
  • Metals Smelting Facilities
  • Gas Separation,Compression and distribution plant
  • Marine Engine cooling repair and maintenance
  • Offshore Production Platforms

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Universal Supply Limited
Unit 32 Orgreave Close
Dore House Industrial Estate
Handsworth, Sheffield
United Kingdom
S13 9NP

Tel: +44 (0)191 587 1777

[email protected]

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