What is the approximate length of the threaded portion of a 1-1/4" metallic pipe used for gas supply?

The approximate length of the threaded portion of a 1-1/4" metallic pipe used for gas supply is about 1 inch. This measurement aligns with industry standards for threaded pipes, where the length of threads is typically designed to provide a secure and leak-proof connection without extending excessively along the pipe.

In many applications, the standard threading configuration and length are governed by regulations and codes that ensure safety and compatibility within gas systems. The 1-inch length provides enough surface area for effective engagement with fittings or other pipe sections, minimizing the risk of leaks while also considering ease of handling and installation.

Other measurements provided, such as 0.5 inches or lengths exceeding 1 inch, would not meet the typical standards for a 1-1/4" gas supply pipe, leading to either inadequate connections or unnecessary complexity in joining components. Thus, 1 inch serves as a practical and widely accepted standard for the threaded portion of such pipes in gas applications.