Flanges are important parts of industrial piping systems that are used to bind the pipes, valves, and pumps among other equipment. With small utility pipelines through to large scale oil and gas plants, proper choice of flanges will make them safe, perform well and offer long services to the user. The Flanges Weight Chart is one of the most significant technical documents that are used in selections of flanges and it is a document that contains standardized details of weights of various flange sizes, pressure classes and types.