What does S.O. represent in the context of pipe fittings?

The abbreviation S.O. in the context of pipe fittings stands for "Slip On." This term refers to a type of fitting that is designed to be slipped over the end of a pipe. Slip-on fittings are commonly used in various piping applications because they allow for quick and easy assembly. They provide a smooth transition from one pipe to another and are typically secured in place using welding or other fastening methods.

This design makes slip-on fittings versatile and user-friendly, as they enable efficient connection without the need for complicated joint designs. They are often used in conjunction with pipes of the same diameter and are particularly advantageous in applications where alignment is crucial.

Understanding the term "Slip On" is important for pipefitters and anyone working with piping systems, as it reflects an essential method of connecting pipes in a way that facilitates ease of installation and maintenance.