Interface control document. An interface control document (ICD) in systems engineering and software engineering, provides a record of all interface information (such as drawings, diagrams, tables, and textual information) generated for a project.
How well do you know your pipe flanges? Remember that flanges come in a variety of shapes and sizes to suit different applications. A flange is usually in the shape of a disc and is used to connect two tubes together or to connect a pipe to a valve, tee, choke or other component. Providing support and strength, two flanges are typically attached to pipe ends with a gasket in between.
The toilet flange is the fitting that attaches the toilet to the drain line. The diameter of the waste outlet for the toilet may not match the diameter of the drain pipe -- the toilet may be 4 inches, for example, while the drain line is 3 inches.