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Ductile Iron Fittings

Download Technical Specifications

Flange drilling is in accordance with ANSI B16.1 (Class 125).

Fittings may be specified with flanges modified to extra-heavy 250 lb (Class 250) drilling. Laying length and wall thickness of these fittings conform with
ANSII AWWA CnolA21.10 with both drilling patterns in accordance with ANSI B16.1.

However, Class 250 flanged ends are larger, thicker, possess different bolt circles and may have more bolt holes. Class 125 flanged fittings cannot be joined to Class 250 flanged fittings even though both are rated at 250 psi water working pressure.