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