Which diameter of screwed steel pipe has a thread length of 1 7/8"?

The standard for screwed steel pipe often includes specific dimensions for thread lengths based on the diameter of the pipe. A thread length of 1 7/8 inches is a common measurement associated with certain larger diameter pipes, typically seen in industrial applications.

When examining the dimensions for screw threads on steel pipes, different diameters correspond with different standard thread lengths. Specifically, 8-inch diameter screwed steel pipes are designed to have a thread length of 1 7/8 inches. This matches the specifications laid out in various piping and plumbing codes, which dictate thread lengths based on pipe size to ensure compatibility with fittings and connections.

The other diameters—6", 10", and 12"—do not have a thread length of 1 7/8 inches according to standard practices. Each of these sizes corresponds with different thread lengths, which do not align with the specified measurement in the question presented. This reinforces the fact that the 8-inch diameter is correctly matched with the given thread length.