The internal diameter of 2 inch Type L copper pipe is approximately which value?

The internal diameter of 2 inch Type L copper pipe is approximately which value?

• A. 1.985
• B. 1.875
• C. 2.000
• D. 1.900

Answer: (A)

When a pipe is listed by nominal size, that size is not the exact inside measurement—the inside diameter depends on the wall thickness. For a 2-inch nominal copper tube, the outside diameter is fixed at about 2.375 inches. Type L has a wall thickness around 0.195 inches per side for this size, so you subtract twice that from the outside diameter to get the inside diameter: 2.375 minus 2 times 0.195 equals about 1.985 inches. That’s why the internal diameter is approximately 1.985 inches. The other values would imply wall thicknesses that don’t match the standard Type L specifications for a 2-inch tube.

When a pipe is listed by nominal size, that size is not the exact inside measurement—the inside diameter depends on the wall thickness. For a 2-inch nominal copper tube, the outside diameter is fixed at about 2.375 inches. Type L has a wall thickness around 0.195 inches per side for this size, so you subtract twice that from the outside diameter to get the inside diameter: 2.375 minus 2 times 0.195 equals about 1.985 inches. That’s why the internal diameter is approximately 1.985 inches. The other values would imply wall thicknesses that don’t match the standard Type L specifications for a 2-inch tube.