Ductile Iron Saddle Outlets

Ductile Iron saddle outlets are an economical alternative to tee fittings and welded-on bosses in new construction. Because it can be placed anywhere on the pipe barrel, no cuts have to be made, saving time and money.

  • For use on Ductile Iron mains for pressure connections (wet taps).
  • Also recommended for branch connections such as tees, blowoffs, or devices such as air release valves and more.
  • Alternative of 250 psi rated tees and tapping sleeves where branch outlets (4", 6", 8" and 12") are required on pipe 16"-64" in diameter.

Product Downloads

  • Ductile Iron Saddle Outlets

    View and/or download to learn more about U.S. Pipe's Ductile Iron Saddle Outlets.

    View PDF

FAQs // Ductile Iron Saddle Outlets

Cast iron is a generic name for any high carbon molten iron poured as a casting. When used to refer to pipe, cast iron (sometimes called gray iron) is a specific type in which the free graphite (Carbon) is in the shape of flakes. Cast Iron pipe were introduced into the United States in 1817. 

Ductile Iron is a specific type of cast iron in which the free graphite is in the shape of nodules or spheroids. (Other names for ductile iron are nodular iron or spheroidal graphite iron.) Ductile Iron Pipe were introduced to the market in 1955. 

Although nearly identical chemically, the two irons are quite different metallurgically. The now obsolete standard for Cast Iron Pipe (ANSI/AWWA A21.6/C106) required an iron strength of 18/40 (18,000 psi Bursting Tensile Resistance and 40,000 psi Ring Modulus of Rupture.) Although tensile testing was not a requirement of this standard, a tensile test of gray cast iron pipe would give a test result of approximately 20,000 psi Ultimate Tensile Strength, with no measurable Yield Strength or Elongation. 

The current standard for Ductile Iron Pipe (ANSI/AWWA A21.51/C151) requires a minimum grade of 60-42-10 (60,000 psi Ultimate Tensile Strength, 42,000 psi Yield Strength, and 10% Elongation.) In addition, Ductile Iron Pipe manufactured under this standard are required to meet a minimum of 7 ft lbs impact resistance by the Charpy test. (Compare Gray Iron Pipe with an impact resistance of approximately 2 ft lbs or less.) 

The difference in the physical properties of these two materials is attributable almost entirely to the difference in the shape of the free graphite. The shape of the graphite is determined at the instant of solidification and is made nodular by the addition of magnesium to the molten iron bath. Although Cast Iron was the best engineering material available for pipe production for nearly five hundred years, the development of Ductile Iron Pipe provides a far superior product.