AWWA C208-96 Dimensions for Fabricated Steel Water Pipe Fittings (PDF)
This standard provides overall dimensions for fabricating steel water pipe fittings for sizes 6 in. through 144 in. (150 mm through 3,600 mm) for water transmission and distribution facilities and serves as a dimensional guide only. It is not intended to be a standard for wall thickness, pressure ratings, and structural or hydraulic design. Reinforcement of fittings, which may include increased wall thickness, collars, wrapper plates, or crotch plates, is not covered. The design of fittings should be made in accordance with the applicable section in AWWA Manual M11, Steel Pipe--A Guide for Design and Installation.
Description
The major revisions in this edition of ANSI/AWWA C208-96 include the following: the format has been changed to AWWA standard style; the definitions of parties (Sec. 3) have been revised to approved wording; Sec. 1.1.1, Conditions Not Covered (previously Sec. 1.2), has been revised to clarify that this standard is a dimensional guide only and that all design of fittings should be made in accordance with the applicable sections of AWWA Manual M11; Sec. 4.1.2 has been added and includes all symbols used in tables and formulas within the standard; Sec. 4.1.3, Tees and Crosses (previously Sec. 2.2), has been revised to include a formula for calculating dimensions for any pipe outside diameter; Sec. 4.1.4, Reducing Tees and Reducing Crosses (previously Sec. 2.3), has been revised to include reducing crosses; Sec. 4.1.5, Laterals (previously Sec. 2.4), has been separated into Sec. 4.1.5 for Case I (equal diameters) and Sec. 4.1.6 for Case II (unequal diameters) with new symbols Gr and Go and new formulas added; Sec. 4.1.7, Wyes (previously Sec. 2.5), now includes dimensions for 90° wyes, which are given in Table 1, and formulas to calculate other diameters and degrees; Sec. 4.1.9, Tangential Outlets (previously Sec. 2.8), has been revised and Table 3 has been replaced with a formula and a caution about keeping dimension L short to avoid damage in handling and shipping; Sec. 4.1.10, Miter End Cuts, has been added; Sec. 4.1.11, Elbows (previously Sec. 2.7), has been changed; dimensional tables have been deleted and formulas have been added for calculating dimensions for any diameter. Current philosophy for fabricating elbows into pipe lengths instead of individual short pieces is also discussed; and, Figure 2 has been added to present recommended dimensions for water pipe elbows, including two-piece elbows (0° to 22.5°), three-piece elbows (more than 22.5° to 45°), four-piece elbows (more than 45° to 67.5°), and five-piece elbows (more than 67.5° to 90°).