What is Pipe Schedule

What is steel pipe dimensions chart?

A steel tubing dimensions chart comprises the nominal pipe size, the outer and inner diameters, and the wall thickness. You can also find the weight, usually in lb/ft.
These charts are available for pipes of different schedules. You can calculate it based on the internal service pressure and the tensile strength. Likewise, the thickness of the material impacts the inner dimensions and the total internal it can tolerate. Referring to standard steel pipe dimensions metrics is a quick and effective way to identify the right components for your needs.

pipe schedule

What are standard steel pipe sizes?

Steel often gets favoured in multiple industries due to its stability, corrosion resistance, and strength. However, the standard steel pipe sizes range from 1/2″, 3/4″, onwards to 24″. You can also find options up to 36″.
You can use steel tube sizes metric and find pipes in different sizes if your requirement is specialized. Manufacturers can customize the piping per your needs if you specify the corresponding dimensions: the nominal diameter and the schedule. Based on these metrics, the outer diameter and the wall thickness get determined.
While selecting the pipe for your installation, it is wise to adhere to internationally accepted standards. It will help you achieve compatibility across brands and assure you of safety and performance.

Is a steel pipe measured by ID or OD?

The outside and inside diameters of the pipe play significant roles in letting you choose the best component for your requirement. Steel pipe dimensions metric get measured based on the outside diameter (OD). The nominal bore size matches the OD for piping over 14”. However, pipes with a bore of 12” or less have a different OD.
For a specific nominal bore (NB), the outer diameter is constant. But with the schedule, the internal diameter varies. Once you know the nominal bore, you can measure the ID from a steel pipe id chart. The formula is:
ID = NB – 2 x wall thickness
Note that the internal pipe diameter may vary from this calculation because of the specified tolerance.

What is the OD of 1 steel pipe?

The OD refers to the actual outside diameter of the steel pipe. Pipes typically get measured based on the OD. It gets measured in inches or fractions of inches. The metric system employs steel pipe dimensions in mm.
Along with the OD, you also have to consider the schedule to get the wall thickness. But the OD stays the same irrespective of this. For example, the OD of an NPS 1 steel pipe is 1/315”.
In steel pipes, the diameter gets represented by the nominal thickness. It refers to the dimensions of the hole in the piping. It is vital to note that this non-dimensional number does not show the actual diameter.

What is the nominal OD of pipe?

Steel pipes get measured based on the diameter. The nominal OD refers to the outer diameter of the piping. The nominal pipe size or NPS is usually non-dimensional, but it will match the outside diameter after NPS 14.
It is easy to confuse the nominal OD with the actual diameter. But making the distinction is salient to avoid acquiring unsuitable components. A steel pipe od chart in mm can help you understand the dimensions.
This metric applies to all piping materials. Along with the schedule and the material specifics, the NPS is the main parameter you must mention when ordering a component.

What is DN and OD?

Both these metrics are indispensable in specifying the right piping solution for your needs. The DN refers to the Nominal Pipe Size in inches. When you need to choose a pipe, you identify it by the nominal name that relates to the actual dimensions vaguely. A steel pipe size chart in mm will list these values. For example, a steel pipe of NPS 2” may have an inside diameter of 2 1/8”. NPS becomes DN or Diametre Nominal when you use metric units.
The OD, however, indicates the outside diameter of the pipe. It gives the outer diameter based on the dimension that can get measured. These designations get used across sectors like natural gas, plumbing, and regular piping solutions in buildings.