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.
Quick Answer. Determine flange and bolt dimensions by measuring several key areas of your flange and then correlating these measurements to a flange and bolt dimension chart. Key dimensions to measure for the flange itself are nominal pipe size and flange diameter. For the bolts, measure the bolt diameter, bolt hole diameter and total diameter of the entire bolt circle.