How It Works: Steel Blind Flanges

Blind flanges are installed at the pipelines endings and differ from conventional steel flanges with the absence of a central hole. Steel flanges are designed to overlap the endings of the medium pipes (or tube plates, all the piping equipment is typically assembled at a particular facility, if medium-large scale businesses are considered, e.g. Birmingham-based AlexanderComley facilities) and typically mounted by means of bolts or studs.

Blind flange part of the pipeline is designed to lock the end portions of the pipeline. A true to type blind flange is round in shape with an annular bearing surface and holes in it for the bolts to attach the pipe fittings.

The purpose of blind flanges is blocking any branches of the pipeline without the need of their further usage. This is their essential difference from the flange, the function of which is to connect the sections of the pipeline.

Blind flange steel

Depending on the required performance and quality of the final result, steel flanged caps are constructed basing on a variety of technologies: e.g. hot stamping or gas scraping from sheets of top grade steel or metal.

  • The method of hot stamping. This method is technologically, high production speed, ease of manufacture. The disadvantages of this method are the high energy consumption and high operational expenses, resulting in an increased cost of the product.
  • Gas or plasma cutting of sheet metal or long products. The advantages of this method are evident: no cracks, voids in the metal, improved mechanical properties and a better weldability. Disadvantages of this method: high metal consumption and still high end-cost of the product.

The use of these methods is explained by the highest-quality product obtained as a result with no cracks and voids in the base. Through the use of modern technology blind steel flanges are characterized by impeccable strength and long years of service, as well as improved mechanical properties, contributing to easier installation and maintenance.

Flanged plugs have a wide range of applications: they are utilised in a multitude of industries, such as gas, oil, chemical, as well as in building water, gas and oil pipelines. Steel flanges are manufactured in accordance with state standards and specifications for piping and components have a high degree of resistance to corrosion, corrosion activity and the impact of transported substances, enableing reliable use in different climatic conditions: both high (up to 650 degrees) and cold (-70 degrees centigrade) temperatures.

There is a wide variety of pipe stub types and modifications. Blind flanges vary in diameter from 32 to 1020 mm, they retain the performance characteristics at a temperature of from -70° C to + 600° C and pressure to 160 kg / cm 2.

Apart from producing flanges meeting the particular standards, a firm may take advantage of ordering a custom solution that meets the requirements of a particular construction. AlexanderComley is an exemplary centre providing a variety of both standard (ANSI/ASME, API, etc.) and custom-designed stainless steel flanges and butt weld fittings uk stand out from the crowd with extraordinary quality and impressive guarantee terms. Drop in at an official website to learn more about UK-based AlexanderComley facilities.