There are millions of miles of pipelines, worldwide, used for the transmission of drinking water. These pipelines must offer corrosion resistance to the water itself, soil chemistries, and treatment chemicals in order to provide both a long service life and hygienic delivery of drinking quality water. Type 316 (2-3% Mo) stainless steel has been shown to provide the necessary corrosion resistance for most applications, at a cost competitive with other piping materials. Where additional corrosion protection might be needed, as in shoreline installations, the duplex SS (3.0-3.5% Mo) can be used to achieve the required hygiene, cost and service life.
To answer the question “Why Stainless Steel?” these and other beneficial properties of the Mo containing stainless steels are summarized as follows: