What is the effective thread length of a 1" diameter screwed steel pipe?

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The effective thread length of a 1" diameter screwed steel pipe is commonly standardized in plumbing and pipe fitting practices. For a nominal 1" (which typically has an actual outer diameter of about 1.315 inches for Schedule 40 pipe), the effective thread length, which refers to the length of the threads that can bite into the corresponding female fitting, is typically around 7/8 inches. This dimension is significant because it determines how securely the pipe can join with fittings without stripping or leaking.

Recognition of such standards is essential in construction and plumbing to ensure proper installation and to prevent issues in the integrity of pipe connections. The other measurements listed do not align with the standardized effective thread length for a 1" pipe as per the usual plumbing codes and practices.

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