Flanges production is a complex technical process. Manufacturing a nicely crafted item is hardly possible without scrupulous adherence to the production technology. Since the flanges are operate under different conditions, the external and internal influences (humidity, temperature, pressure, and so forth), as well as properties of the transported material should be taken into account. Therefore, when choosing the desired flange a specialist needs to be sure it complies with the specified requirements.

A true to type flange is a flat disc or ring made of steel with holes for connecting bolts (stud bolts). It is used for hermetic connection of tanks, pipes and so forth. The flange provides a solid connection which, nevertheless, still contributes to easy assembling and dismantling. Flat flanges are utilised to connect pipes and valves, several pipes, pipes and some equipment and etc.

The blanks for the manufacture of the flanges are typically obtained by molding, stamping, and in rare cases by means of forging. In addition, a standard flange rolling, sheets or rods, can be used in production. In this case, the first segment of the blank is performed using plasma or laser cutting, as well as a gas burner; once that is done, the future flange is sent to cutting machine.

Regional flange manufacturing standards

For example, in Germany the flat flanges are manufactured in strict accordance to the German standard DIN, in Europe – EN, in the United States – ASME/ANSI. Despite the fact that standard requirements are similar, they do differ in the methods of verification.

When installing sophisticated equipment standard production means may hardly be the suitable option. In this case, the bespoke flanges are produced with the quality of the machined surfaces meeting the stated requirements.

The Basics Of Flanges Production

Flanges are used as connecting elements in laying pipelines. With their help provided tight connection of separate parts of the pipeline and the attachment of fittings/equipment.

Previously for such purposes forged parts were used. To date, they have been crowded out by more reliable standard and bespoke flanges. The fabrication of the coupling elements became less costly; moreover, it provides incomparable efficiency in operation. Thus, forged steel flanges outperform its outdated competitors in flexibility and ease of use. Not only the construction is beneficial itself, the innovative companies, such as AlexanderComley, produce stainless steel flanges and tubesheets armed with neoteric equipment, which allows manufacturing truly cost-efficient tools.

Flanges are usually mounted as pairs, forming the so-called flanged connection. Due to its strength and suitability for a wide range of pressures, the flange connection is commonly used for connection of pipeline shut-offs and control valves.

When connecting the individual parts of the pipeline steel and welded flanges. Basically, there are several production options used by manufacturers:

  • hot stamping
  • gas cutting
  • centrifugal electroslag casting

In the first case, the steel is heated and a blank is stamped. Then workpiece is adjusted to the desired parameters with the help of machine. Several holes are drilled for mounting bolts. Manufacture of parts by gas cutting, as the name implies, involves the use of welding equipment. The blank is cut from the sheet steel of a given thickness. The further process is the same: through the use of machine tools, a workpiece is given the necessary form and size.

The method of bending a steel strip allows producing butt weld fittings UK production AlexanderComley is actively engaged in. The process of production is as follows: steel strip of required thickness is heated. Then, it is bent according to the shape and diameter of the future flange. The seam is welded, and the finished flanges are mounted with supply pipe for connection with the conduit.