Piping and Auxiliaries: Basic Components and Functions

State the purpose of piping. State the purpose of pipe fittings. Describe the following types of pipe fittings: nipple, coupling, union, flange, elbow, tee, Y, bell reducer, bushing, plug, and cap. Explain why piping moves and why this movement needs to be controlled. State the functions of pipe hangers and supports. State the functions of expansion joints and expansion loops. Explain why piping is insulated. Describe how steam and electrical heat tracing methods work.