What does the term “fitting allowances” typically refer to in steamfitting?

The term "fitting allowances" refers specifically to compensations made in the layout and installation of piping systems, especially when dealing with non-linear segments such as curves, bends, or changes in direction. In steamfitting, allowances are considered to ensure that the fittings will properly align with the segments they connect while accounting for factors like thermal expansion or contraction.

This practice is critical for maintaining the integrity and efficiency of the piping system. When curved fittings are involved, precise allowances must be made to facilitate proper installation and to avoid undue stress on the piping, which could lead to leaks or system failure.

While extra material for welding, adjustments for system pressure, and accommodations for other types of fittings are important considerations, they do not specifically align with the definition of fitting allowances as it applies to the nuances of fitting installations in steamfitting. Fitting allowances focus more on the specifics of overall geometry and flow dynamics, making them particularly relevant in the context of transverse segments where curves or angles are present.