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Pipe

Understanding pipe sizes...

Pipe sizes can be pretty confusing. That's because sometimes people talk about the outside diameter (OD) while others talk about the inside diameter (ID).

To overcome this confusion, the manufacturers introduced a sizing system which gives each size a name instead of a measurement. Pipes are give a "Nominal Bore" size (NB). Here's how it works...

Every NB size gives you only a rough idea of the inside measurement. It's only rough because it depends on the wall thickness - it's the OD that stays constant.

For example, pipe that was once called 1" is now called 25NB. This size will always have an OD of 33.7mm, and comes in a range of different wall thicknesses (WT). If it has a "Medium" WT (3.2mm),  then the actual ID will be 33.7 - 3.2 - 3.2 = 27.3mm

If you need help working out what size you need, get in touch with us through our Contact Us page.

10NB (17.2 OD)
Black Medium (2.3WT) - 6.5m	Stock Item
Black Heavy (2.9 WT) - 6.5m	Non-Stock Item
Galvanized Medium (2.3 WT) - 6.5m	Non-Stock Item
Galvanized Heavy (2.9 WT) - 6.5m	Non-Stock Item
15NB (21.3 OD)
Black Light (2.0 WT) - 6.5m	Non-Stock Item
Black Medium (2.6 WT) - 6.5m	Stock Item
Black Heavy (3.2 WT) - 6.5m	Non-Stock Item
Galvanized Light (2.0 WT) - 6.5m	Non-Stock Item
Galvanized Medium (2.6 WT) - 6.5m	Stock Item
Galvanized Heavy (3.2 WT) - 6.5m	Non-Stock Item
20NB (26.9 OD)
Black Extra Light (2.0 WT) - 6.5m	Non-Stock Item
Black Light (2.3 WT) - 6.5m	Non-Stock Item
Black Medium (2.6 WT) - 6.5m	Stock Item
Black Heavy (3.2 WT) - 6.5m	Non-Stock Item
Galvanized Extra Light (2.0 WT) - 6.5m	Non-Stock Item
Galvanized Light (2.3 WT) - 6.5m	Non-Stock Item
Galvanized Medium (2.6 WT) - 6.5m	Stock Item
Galvanized Heavy (3.2 WT) - 6.5m	Non-Stock Item
25NB (33.7 OD)
Black Extra Light (2.0 WT) - 6.5m	Non-Stock Item
Black Light (2.6 WT) - 6.5m	Non-Stock Item
Black Medium (3.2 WT) - 6.5m	Stock Item
Black Heavy (4.0 WT) - 6.5m	Non-Stock Item
Galvanized Extra Light (2.0 WT) - 6.5m	Stock Item
Galvanized Light (2.6 WT) - 6.5m	Non-Stock Item
Galvanized Medium (3.2 WT) - 6.5m	Stock Item
Galvanized Heavy (4.0 WT) - 6.5m	Non-Stock Item
32NB (42.4 OD)
Black Extra Light (2.0 WT) - 6.5m	Non-Stock Item
Black Light (2.6 WT) - 6.5m	Non-Stock Item
Black Medium (3.2 WT) - 6.5m	Stock Item
Black Heavy (4.0 WT) - 6.5m	Non-Stock Item
Galvanized Extra Light (2.0 WT) - 6.5m	Stock Item
Galvanized Light (2.6 WT) - 6.5m	Non-Stock Item
Galvanized Medium (3.2 WT) - 6.5m	Stock Item
Galvanized Heavy (4.0 WT) - 6.5m	Non-Stock Item
40NB (48.3 OD)
Black Extra Light (2.3 WT) - 6.5m	Non-Stock Item
Black Light (2.9 WT) - 6.5m	Non-Stock Item
Black Medium (3.2 WT) - 6.5m	Stock Item
Black Heavy (4.0 WT) - 6.5m	Stock Item
Black Extra Heavy (5.4 WT) - 6.5m	Non-Stock Item
Galvanized Extra Light (2.3 WT) - 6.5m	Stock Item
Galvanized Light (2.9 WT) - 6.5m	Non-Stock Item
Galvanized Medium (3.2 WT) - 6.5m	Stock Item
Galvanized Heavy (4.0 WT) - 6.5m	Non-Stock Item
50NB (60.3 OD)
Black Extra Light (2.3 WT) - 6.5m	Non-Stock Item
Black Light (2.9 WT) - 6.5m	Non-Stock Item
Black Medium (3.6 WT) - 6.5m	Stock Item
Black Heavy (4.5 WT) - 6.5m	Stock Item
Black Extra Heavy (5.4 WT) - 6.5m	Non-Stock Item
Galvanized Extra Light (2.3 WT) - 6.5m	Stock Item
Galvanized Light (2.9 WT) - 6.5m	Non-Stock Item
Galvanized Medium (3.6 WT) - 6.5m	Stock Item
Galvanized Heavy (4.5 WT) - 6.5m	Non-Stock Item
65NB (76.1 OD)
Black Extra Light (2.3 WT) - 6.5m	Non-Stock Item
Black Light (3.2 WT) - 6.5m	Non-Stock Item
Black Medium (3.6 WT) - 6.5m	Stock Item
Black Heavy (4.5 WT) - 6.5m	Non-Stock Item
Black Extra Heavy (5.9 WT) - 6.5m	Non-Stock Item
Galvanized Extra Light (2.3 WT) - 6.5m	Non-Stock Item
Galvanized Light (3.2 WT) - 6.5m	Non-Stock Item
Galvanized Medium (3.6 WT) - 6.5m	Stock Item
Galvanized Heavy (4.5 WT) - 6.5m	Non-Stock Item
80NB (88.9 OD)
Black Extra Light (2.6 WT) - 6.5m	Non-Stock Item
Black Light (3.2 WT) - 6.5m	Non-Stock Item
Black Medium (4.0 WT) - 6.5m	Stock Item
Black Heavy (5.0 WT) - 6.5m	Non-Stock Item
Black Extra Heavy (5.9 WT) - 6.5m	Non-Stock Item
Galvanized Extra Light (2.6 WT) - 6.5m	Non-Stock Item
Galvanized Light (3.2 WT) - 6.5m	Non-Stock Item
Galvanized Medium (4.0 WT) - 6.5m	Stock Item
Galvanized Heavy (5.0 WT) - 6.5m	Non-Stock Item
90NB (101.6 OD)
Black Extra Light (2.6 WT) - 6.5m	Non-Stock Item
Black Light (3.2 WT) - 6.5m	Non-Stock Item
Black Medium (4.0 WT) - 6.5m	Non-Stock Item
Black Heavy (5.0 WT) - 6.5m	Non-Stock Item
Galvanized Extra Light (2.6 WT) - 6.5m	Non-Stock Item
Galvanized Light (3.2 WT) - 6.5m	Non-Stock Item
Galvanized Medium (4.0 WT) - 6.5m	Non-Stock Item
Galvanized Heavy (5.0 WT) - 6.5m	Non-Stock Item
100NB (114.3 OD)
Black Extra Light (3.2 WT) - 6.5m	Non-Stock Item
Black Light (3.6 WT) - 6.5m	Non-Stock Item
Black Medium (4.5 WT) - 6.5m	Non-Stock Item
Black Heavy (5.4 WT) - 6.5m	Non-Stock Item
Galvanized Extra Light (3.2 WT) - 6.5m	Non-Stock Item
Galvanized Light (3.6 WT) - 6.5m	Non-Stock Item
Galvanized Medium (4.5 WT) - 6.5m	Stock Item
Galvanized Heavy (5.4 WT) - 6.5m	Non-Stock Item
125NB (139.7 OD)
Black Extra Light (3.0 WT) - 6.5m	Non-Stock Item
Black Light (3.5 WT) - 6.5m	Non-Stock Item
Black Medium (5.0 WT) - 6.5m	Non-Stock Item
Black Heavy (5.4 WT) - 6.5m	Non-Stock Item
Galvanized Extra Light (3.0 WT) - 6.5m	Non-Stock Item
Galvanized Light (3.5 WT) - 6.5m	Non-Stock Item
Galvanized Medium (5.0 WT) - 6.5m	Stock Item
Galvanized Heavy (5.4 WT) - 6.5m	Non-Stock Item
150NB (165.1 OD)
Black Extra Light (3.0 WT) - 6.5m	Non-Stock Item
Black Light (3.5 WT) - 6.5m	Non-Stock Item
Black Medium (5.0 WT) - 6.5m	Non-Stock Item
Black Heavy (5.4 WT) - 6.5m	Non-Stock Item
Galvanized Extra Light (3.0 WT) - 6.5m	Non-Stock Item
Galvanized Light (3.5 WT) - 6.5m	Non-Stock Item
Galvanized Medium (5.0 WT) - 6.5m	Stock Item
Galvanized Heavy (5.4 WT) - 6.5m	Non-Stock Item