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This section provides an overview for blind flanges as well as their applications and principles. Also, please take a look at the list of 10 blind flange manufacturers and their company rankings.
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A blind flange or blank flange is a type of joint used in piping and is a flange that stops the flow of the fluid at the end of a pipe. Generally, "closed flange" and "blind flange" are used as synonymous terms.
Blind flanges are used to temporarily or permanently stop the flow of fluid at the end of a pipe by attaching it to the mating side of the pipe end flange.
To select blind flanges, the material, pressure resistance, size (inside and outside diameter), etc., are selected based on the type of fluid, pressure, temperature, flow rate, etc. Basically, the same specification, material, and size as the flange installed on the mating side should be selected.
Although valves and other devices may be used to stop the flow of fluid, blind flanges are used to close the opening at the end of pipe and blind flanges completely. This prevents foreign matter from entering through the opening and enables the pipe to be closed without being exposed to the atmosphere.
The principle of blind flanges is exactly the same as that of ordinary piping flanges: the flange surfaces to be connected are tightly sealed by adhering to each other. The difference from a normal piping flange is that the flange has no holes for pipes, but only holes for bolts.
As with ordinary piping flanges, a gasket is generally inserted between the flanges to increase the adhesiveness of the flanges. The flanges are tightened together with bolts and nuts to increase and maintain the adhesion. In this case, the bolts and nuts must be tightened evenly.
For this reason, bolts and nuts are generally tightened diagonally rather than in sequence. It is also important to tighten the bolts and nuts at the specified torque value for the gasket material and bolt/nut. The tightening torque is gradually increased in diagonal order until the required tightening torque value is reached.
When used with high-temperature fluid, the tightening of the threads may loosen due to thermal expansion after the actual flow of high-temperature fluid. In such cases, the bolts and nuts must be re-tightened.
Although the material of the membrane flange varies depending on the fluid used, generally austenitic stainless steels such as carbon steel, SUS304 and SUS316, or carbon steel castings, are used. As mentioned above, the same material as that of the mating flange should be used.
Selection of the type, model, and material of the gasket to be inserted between the flanges is also important to improve and maintain sealing performance. Selection criteria are usually defined by various standards, and selection is based on the type of fluid, temperature, and pressure.
*Including some distributors, etc.
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Dynamic Forge & Fittings P. Limited, established in 2009, is a company based in Valsad, India, that is a manufacturer of Pipe Fittings that adhere to National and International Standards. Dynamic Forge formulates specific strategies to attain consistent national and international Optimum Quality Standards, aligning with the quality standards set by customers to fulfill their expectations. The organization demonstrates a solid devotion to consistently advancing Quality Management practices to assure their appropriateness.
Kamlesh Metal (India) is an ISO certified manufacturer and supplier of pipe fittings based in Kumbharwada, Mumbai, and was founded in 2000. Products the company specializes in include flanges, fasteners, buttweld fittings, socket weld fittings, and other piping connections produced from stainless steel, carbon steel, titanium, and various alloys. It additionally manufactures metallic sheets, plates, tubes, round bars, and wires. The company exports its products internationally and has stockyards worldwide, including Saudi Arabia, Indonesia, Australia, the United States, and the United Kingdom.
Aesteiron Steels LLP (ASL) is an Indian manufacturer and supplier of seamless tubing and welded steel pipes that was established in Mumbai in 2007. The company primarily produces various steel pipes in various grades, including carbon, alloy, and stainless steel models, as well as aluminum and copper pipes with higher conductivity. They also offer custom fabrication of alloy pipes using different elements such as chromium or molybdenum, or with specifications for higher oxidation or corrosion resistance. ASL chiefly serves clients in the power generation, petrochemical processing, water treatment, construction, and infrastructure sectors.
Metline Industries, founded in Maharashtra, India, in 2014 is a manufacturer of Steel Pipes, Fittings, and Flanges. The company's product portfolio includes Seamless and welded steel pipes, Steel pipe fittings such as elbows, tees,and reducers and Steel flanges. The company serves markets including Medical and Healthcare, Aerospace and Defense, Consumer Goods, Industrial Manufacturing and Construction and Building. The company provides services such as Product Selection Guidance, Engineering Support, New Product Design and Development and Custom Manufacturing.
Ganga Forging Ltd, established in 1989 is based in Rajkot Gujarat, India as a major steel forging manufacturer. With a customer-centric approach the company delivers specialized customized products and services to meet the unique requirments of their clients at a competitive price. Their portfolio of the company includes a range of products such as Anchor Shackle, Big Yoke, Blind Flanges, and much more. The company has served all major industries such as mechanical, oil refineries, mining and much more.
The Metals Factory, founded in India is a manufacturer of steel pipes, pipe fitting, and pipes. The company product portfolio consists of a wide range of steel pipes, including seamless, and welded that are available in various sizes, grades, and specifications to meet diverse industry needs and a range of pipe fittings, including elbows, tees, reducers, and flanges. The company exports its products to countries in Africa, America, Europe, Middle East and Australia.
Dhanwant Metal Corporation, established in 1986 and headquartered in Maharashtra, India, is a manufacturer, supplier, and dealer of various metal products. It offers a wide range of products including aluminium bronze bar, valves, and FRP GRP pipes. It also offers round bars, pipe fittings, and flanges. The company is ISO certified, and has received an award as the "Supplier of the Year" for stainless steel and pipe fitting products in 2022.
Metallica is an Indian manufacturer and supplier of steel pipes and fittings that was established in New Mumbai in 1975. The company primarily produces various steel pipes for different industrial applications, including welded, seamless, EFW, LSAW and SSAW pipes. They also offer related accessory parts such as flanges, gaskets, and pipe fittings. These are commonly used in power generation, chemical processing, construction, and infrastructure. Metallica exports its products to over 70 countries in Asia, Europe, Africa, North America, and Australia via its network of partner distributors and sister companies.
Metal Industries is a 25-year-old, ISO 9001:2008 certified supplier based in Vasai, India, specializing in high-quality flanges for various industries. The company offers an extensive range of flanges, subjected to rigorous quality checks and available for third-party inspection. They pride themselves on time-bound delivery and cost-effective solutions, made possible through a state-of-the-art factory. With a dedicated customer service team and value-added services like custom manufacturing and repair, Flanges.co has garnered a loyal client base of over 500 companies worldwide.
Number of Employees
Newly Established Company
Company with a History
*Including some distributors, etc.
*Including some distributors, etc.
| Country | Number of Companies | Share (%) |
|---|---|---|
|
India
|
6 | 85.7% |
United States of America
|
1 | 14.3% |
