Steel Tube Comparison

Comparison of Outside Diameters and Tolerance
EN10255 BS1387 EN10255 & BS1387 EN10255 Type L
Specified Outside Diameter Nominal Diameter Thread Designation  
mm mm inches mm min mm max
10.2 6 1/8  
13.5 8 1/4 13.2 13.9
17.2 10 3/8 16.7 17.4
21.3 15 1/2 21.0 21.7
26.9 20 3/4 26.4 27.1
33.7 25 1 33.2 34.0
42.4 32 1 1/4 41.9 42.7
48.3 40 1 1/2 47.8 48.6
60.3 50 2 59.6 60.7
76.1 65 2 1/2 75.2 76.0
88.9 80 3 87.9 88.7
101.6 - 3 1/2 100.3 101.2
114.3 100 4 113.0 113.9
139.7 125 5 138.5 140.8
165.1 150 6 163.9 166.5
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