This standard provides formulas to calculate overall dimensions of fittings for steel water transmission and distribution facilities.

Many configurations of fittings are possible, and alternatives to this standard may be agreed on between the purchaser and manufacturer. The fitting dimensions shown in Figures 1 through 6 are the minimum dimensions for fittings with plain ends. In practice, fittings can be provided as individual pieces as shown, shop fabricated into full lengths or special lengths of pipe, or fabricated into assemblies combining a number of fittings.

1.1.1 Conditions not covered in this standard. This standard is intended to serve as a dimensional guide only. It is not a design standard for wall thickness, pressure ratings, structural design, or hydraulic design. Reinforcement of fittings, which may include increased wall thickness, collars, wrapper plates, or crotch plates, is not described in this standard. The design of fittings should be performed in accordance with the applicable section(s) in AWWA M11, Steel Pipe: A Guide for Design and Installation.

This standard or sections of this standard can be referenced in the purchaser’s documents for dimensions for fabricated steel water pipe fittings. The stipulations of this standard apply when this document has been referenced and then only to dimensions for fabricated steel water pipe fittings.