What is the O.D (outside diameter) of a 10" nominal pipe size?

The outside diameter (O.D.) of a nominal pipe size is standardized based on the nominal size, which is a convenient way to refer to the pipe's diameter without specifying the exact measurements. For a 10" nominal pipe size, the actual outside diameter is not the same as the nominal size.

In the case of a 10" nominal pipe, which is commonly made from materials like carbon steel in standard schedules, the actual O.D. is approximately 10 3/8 inches. This dimension is important for ensuring fittings and other components match properly for a secure and leak-free connection.

Thus, understanding the distinction between nominal pipe size and actual dimensions is crucial for anyone working with pipes, as it directly influences fitting compatibility, cutting, and joining techniques, ensuring that installations adhere to industry standards.