In non-industrial occupancies, how should gas pipe be encased in concrete?

In non-industrial occupancies, gas piping should be encased in concrete with a minimum thickness of 1 1/2 inches. This requirement serves multiple purposes, primarily focusing on both safety and durability. Encasing the gas pipe in this manner helps to protect it from potential physical damage and impacts that could occur in areas where concrete is laid, such as floors or structural foundations.

The specified thickness provides adequate coverage, ensuring that the piping remains insulated from environmental elements and external mechanical forces while also preventing any potential gas leaks from having direct exposure to the surrounding environment. Moreover, the 1 1/2-inch thickness is a standard that balances the need for protection without excessive material usage, which could lead to increased costs or complexity in installation.

Other choices suggest either no encasement, or greater thicknesses that are not necessary in standard construction practices for non-industrial settings. Encasing with only a protective coating can leave the pipe vulnerable to damage from impacts or wear over time, thus making the specified minimum thickness the safest and most effective practice.