Copper Pipe Sizes In Inches And Mm

For example dn20 is the size for copper pipe with an outside diameter of 19 05 mm or 3 4 inch.

Copper pipe sizes in inches and mm.

Note that all whole number inch designations on the following chart convert to multiples of 25 mm except for 3 inch pipe which iso designates as 80 mm. 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. Pipes are identified by nominal or trade names that are loosely related to the actual dimensions. What is nominal pipe size.

A nominal 3 4 in copper pipe in australia has measured diameters of 0 750 in outside and 0 638 in inside whereas a nominal 3 4. However for the pipe sizes nps 14 and above outside diameter is the same as nps. Nominal pipe size nps is the number that defines the size of the pipe. Wall thickness of pipes available in different standard schedules sch for nps nominal pipe size in inch as well as dn diameter nominal in mm are shown in below chart.

Nominal refers to pipe in non specific terms and identifies the diameter of the hole with a non dimensional number for example 2 inch nominal steel pipe consists of many varieties of steel pipe with the only criterion being a 2 375 inch 60 3 mm outside diameter. Nominal pipe size nps is a north american set of standard sizes for pipes used for high or low pressures and temperatures. To understand this concept you have to learn the way pipes are manufactured. In plumbing pipe size is referred to as nominal pipe size nps or nominal pipe size.

While pipe sizes in australia are inch based they are classified by outside rather than inside diameter e g. Metric rules of thumb 1 mm about 1 25 inch thickness of a dime 25 mm about 1 inch 1 25 4 mm 300 mm about 1 foot 12 304 8 mm 1 m roughly 10 sq.