What size and larger piping must be welded unless otherwise authorized?

Welding of piping systems is a critical practice in ensuring safety and integrity in gas distribution systems. The requirement that piping of a specific size must be welded unless otherwise authorized is often dictated by safety regulations and industry standards.

In this instance, piping that is 2 1/2 inches and larger generally necessitates welding due to the increased pressure and stresses encountered in larger diameter pipes. Welded joints provide stronger and more reliable seals than threaded or flanged connections, which can be more susceptible to leaks under these conditions. This requirement helps ensure that the system can withstand the operational demands placed on it, including environmental factors and internal pressures.

By mandating that 2 1/2-inch piping and larger be welded, regulatory bodies aim to enhance the overall safety and reliability of gas systems, minimizing the risk of gas leaks which could have dire consequences. Thus, understanding the significance of piping size in relation to welding practices is crucial for anyone involved in gas system installations and maintenance.