Which type of stainless steel piping is suitable for underground water distribution?

Stainless Steel (316/316L) is particularly suitable for underground water distribution due to its superior corrosion resistance compared to other types of stainless steel, especially in environments that may have higher levels of chlorides, such as those found in groundwater or coastal areas. This grade of stainless steel is alloyed with molybdenum, which enhances its ability to withstand pitting and crevice corrosion commonly associated with saline conditions.

In addition, 316/316L stainless steel is also known for its durability and strength, making it an excellent choice for buried pipelines that may be subject to various stresses from soil movement or external forces. Its resilience to chemical attacks and cleaner valve and fitting connections further supports its reliability in long-term applications.

While options like 304/304L stainless steel may be suitable for some applications, they do not offer the same level of resistance to chloride environments, making them less ideal for underground use. Copper piping, such as Type L, is also commonly used but can be subject to corrosion, particularly when buried in certain soils. CPVC, while it has its own advantages, is not as robust in terms of pressure rating and may not be as suitable for wider temperature ranges and high-stress conditions as 316/316L stainless