What does DN mean in pipe size?

What does DN mean in pipe size?

diametre nominel
It is common to identify pipes by inches using NPS or “Nominal Pipe Size“. NPS is often incorrectly called National Pipe Size, due to confusion with national pipe thread (NPT). The metric equivalent is called DN or “diametre nominel“.

What is difference between NB and OD?

NB (nominal bore) is also frequently used interchangeably with NPS. OD is the outside diameter of the pipe and is fixed for a given size. For NPS 14 and larger, the NPS is equal to the outside diameter (OD) in inches. For a given NPS, the OD stays constant and the wall thickness increases with larger SCH.

What is nominal size DN?

ISO 6708 defines the nominal size – DN – as an alphanumeric designation of size for reference purposes. It comprises the letters DN followed by a dimensionless whole number which is indirectly related to the physical size in millimetres of the bore (ID) or outside diameter (OD) of the end connections.

What size is dn40 pipe?


Diameter Nominal DN (mm) Nominal Pipe Size NPS (inches) Outside diameter (OD) inches (mm)
32 1 1/4 1.660 in (42.16 mm)
40 1 1/2 1.900 in (48.26 mm)
50 2 2.375 in (60.33 mm)
65 2 1/2 2.875 in (73.02 mm)

What is 50 NB pipe size?


NB Size OD
40 1 1/2” 48.26
50 2” 60.33
65 2 1/2” 73.03
80 3” 88.9

What is nominal and gross diameter?

Gross diameter is the diameter of rivet shank after fixing it to the body(which is more than the diameter of shank before fixing it,which is known as Nominal Diameter of Rivet),obviously it is important because it holds the body.

How do I calculate pipe size?

The equation for pipe diameter is the square root of 4 times the flow rate divided by pi times velocity. For example, given a flow rate of 1,000 inches per second and a velocity of 40 cubic inches per second, the diameter would be the square root of 1000 times 4 divided by 3.14 times 40 or 5.64 inches.

What is the standard pipe length?

Single random pipe length is usually 18 – 25 feet plain end or 18 – 22 feet threaded and coupled pipes.

What is the standard size of a pipeline?

In the American system, the pipe diameter is known as ” Nominal Pipe Size ” (NPS) or “Nominal Bore” (NB). In the European system, it is known as the “Nominal Diameter” (DN). The most common standard diameters are as follow: 0.5 inch (15 mm), 0.75 inch (20 mm), 1 inch (25 mm), 1.5 inch (40 mm), 2 inch (50 mm),…

What is nominal thickness of pipe?

Nominal pipe sizes generally range from 1/8 inch all the way up to 12 inches. Increments go up 1/4 inch between these two figures. The outside diameter of the pipe does not necessarily increase at a rate that is proportional to the rate of increase in the nominal size.

What is the inside diameter of a pipe?

Pipes are identified by “nominal” or “trade” names that are loosely related to the actual dimensions. For instance, a 2-inch galvanized steel pipe has an inside diameter of about 2 1/8 inches and an outside diameter of about 2 5/8 inches.

What are the dimensions of steel pipe?

A completely description for steel pipe dimension includes outer diameter (OD), wall thickness (WT), pipe length (Normally 20 ft 6 meter, or 40 ft 12 meters).