Is pipe size inner or outer diameter?

In short: Tube is measured by outside diameter, pipe is measured by inside diameter. There is often confusion as to which size die the customer actually needs – Pipe Size or Tubing Size. Keep in mind that pipe size refers to a nominal – not actual – inside pipe diameter.

What is an outside diameter?

The outer diameter (OD) of a hollow circular pipe is the measurement of the outside edges of the pipe passing through its center. Outer diameter is also known as outside diameter or external diameter.

What is an inside diameter?

The internal diameter of a tube, conductor, or coupling, as distinguished from its OD (Outside Diameter).

How is pipe size measured?

To find it, measure around the circumference of the pipe with flexible measuring tape. Divide the circumference by pi, or about 3.14159. For example, if the circumference is 12.57 inches (319 mm), you would divide by pi, and get an outside diameter of about 4 inches (100 mm).

What is the inside diameter of a 2 inch pipe?

2.375″
Nominal Pipe Size (NPS) is a North American set of standard sizes for pipe. The term nominal refers to pipe in non-specific terms and identifies the inside diameter with a non-dimensional number. For example, a 2-inch nominal steel pipe consists of a family of steel pipe with a 2.375″ diameter.

What is the OD of a 2 inch pipe?

2.375
Pipe Size Chart

PIPE SCHEDULES WALL THICKNESS (Inches)
Nominal	O.D. Inches	80s & E.H.
2	2.375	.218
2 1/2	2.875	.276
3	3.500	.300

What is the outside diameter of 2 inch PVC pipe?

Schedule 40 PVC Pipe Dimensions Chart

Nominal Pipe Size	O.D.	Average I.D.
2″	2.375	2.047
2-1/2″	2.875	2.445
3″	3.500	3.042
3-1/2″	4.000	3.521

What is the outside diameter of 1/2 inch pipe?

1.50″
1-1/2″ tubing has a true 1.50″ outside diameter.

What is the outside diameter of a 2 inch PVC pipe?

What is the outside diameter of a 2 inch pipe?

For example, a 1-1/2″ pipe size actually has an outside diameter of 1.9″ NOT 1.5″. The table below cross-references the nominal dimension of a PIPE with its actual outside diameter….OD and Nominal Pipe Size.

Nominal Pipe Size	Outside Diameter (inches)
1-1/4″	1.66
1-1/2″	1.9
2″	2.375
2-1/2″	2.875

What is the inside diameter of a 2 inch galvanized pipe?

For example, a 1-1/2″ pipe size actually has an outside diameter of 1.9″ NOT 1.5″….OD and Nominal Pipe Size.

Nominal Pipe Size	Outside Diameter (inches)
1-1/4″	1.66
1-1/2″	1.9
2″	2.375
2-1/2″	2.875

What is the inside diameter of 2 inch PVC pipe?

What is the diameter of a 2 inch pipe?

For example, a 2-inch nominal steel pipe consists of a family of steel pipe with a 2.375″ diameter. Pipe also has a wall thickness which is referred to by its schedule. The outside of the pipe is always larger than the inside. The difference between the inside diameter (ID) and the outside diameter (OD) is due to the thickness of the wall.

What is the difference between inside diameter and outside diameter pipe?

The outside of the pipe is always larger than the inside. The difference between the inside diameter (ID) and the outside diameter (OD) is due to the thickness of the wall. Wall thickness also determines the strength of the pipe. Schedule 40 pipe is the most common, however when extra strength is required schedule 80 is available.

How do you determine the size of a pipe?

The current practice is to determine pipe size through two numbers: 1) the pipe bore (or diameter) and 2) the pipe schedule (or wall thickness) – though these two numbers can be configured in slightly different ways depending on the specific pipe used.

What is the wall thickness of pipe?

It is not an actual measurement, but a guide number based on a wall thickness formula. Two pipes the same diameter may have different schedules, which means they have a different wall thickness. So somebody specifying a pipe for a high pressure application will select a bigger number which represents a bigger schedule (wall thickness).