How many millimeters is the diameter of one inch pipe?
The 1 inch tube corresponds to DN25, and the standard outer diameter is 33.4mm. But 32mm is also OK in usually application.
The nominal diameter(also known as nominal diameter and nominal diameter) is used in order to make the pipe and pipe fittings unify.
For example, the thickness of welded pipe can be divided into thin wall steel tube, ordinary steel pipe and thickened steel tube. Its nominal diameter is not an outer diameter or an inner diameter, but a nominal size approximating the inner diameter of a common steel tube.
The diameter of each nominal diameter corresponds to a diameter, and its inner diameter varies with the thickness. The nominal diameter can be expressed in the metric "mm (millimiter)" and can be expressed by the British "in (inch)" .
----------"Definition and selection of pipe element DN (nominal size)" (GB/T 1047-2005)
One inch steel tubes can be used widly in our daily life.
We are a strength manufacture of steel pipes in Tianjin, China, and we has a exporting history for 17 years!
If you have any requirements about these kind of steel tubes, please don't hesitate to contact us!