Pipe Size Reference – Steel/Steam Pipe (Schedule 40) & Copper Tube
💡 Tip: Enter Outside Diameter (mm) on the quote form. Nominal Bore (NB) values are shown for reference only.
Steel / Steam Pipe | Copper Tube | |||
---|---|---|---|---|
Nominal Bore (NB) Pipe size name | Pipe Outside Diameter (mm) For insulation | Tube Nominal Size | Tube Outside Diameter (mm) | |
15 | 21.3 | 15 | 12.7 | |
20 | 26.7 | 20 | 19.0 | |
25 | 33.4 | 25 | 25.4 | |
32 | 42.2 | 32 | 31.8 | |
40 | 48.3 | 40 | 38.1 | |
50 | 60.3 | 50 | 51.2 | |
65 | 73.0 | 65 | 63.5 | |
80 | 88.9 | 80 | 76.2 | |
100 | 114.3 | 100 | 101.6 | |
125 | 141.3 | 125 | 127.0 | |
150 | 168.3 | 150 | 152.4 | |
200 | 219.1 | 200 | 203 | |
250 | 273.0 | 250 | 254 | |
300 | 323.9 | – | – | |
350 | 355.6 | – | – | |
400 | 406.4 | – | – | |
450 | 457.2 | – | – | |
500 | 508.0 | – | – | |
600 | 609.6 | – | – |