Flanges are mechanical components used to connect pipes, valves, pumps, and other equipment to form a piping system. They are typically disc-shaped and feature evenly spaced bolt holes for secure attachment to other components. Flanges play a crucial role in ensuring the integrity and reliability of piping systems by providing a leak-proof and easily maintainable connection.

Common Materials of Flanges:

Stainless Steel: Commonly used due to its corrosion resistance, durability, and strength. Various grades of stainless steel such as 304, 316, and 321 are utilized depending on the application requirements.

Nickel Alloys: These include materials like Inconel, Monel, and Hastelloy, which offer excellent resistance to high temperatures, corrosion, and chemical attack. Nickel alloys are often used in demanding environments such as chemical processing, aerospace, and marine applications.

Copper Alloys: Copper flanges, particularly those made from bronze or brass, are chosen for their good thermal conductivity, corrosion resistance, and suitability for applications involving water, air, or certain chemicals.

Aluminium Alloys: Aluminum flanges are lightweight and offer good corrosion resistance. They are commonly used in low-pressure applications such as air and water systems where weight reduction is desired.

Titanium Alloy: Titanium offers exceptional strength-to-weight ratio and excellent corrosion resistance, making it suitable for demanding applications in industries such as aerospace, chemical processing, and marine engineering.


Manufacturing Process Of Flanges

Raw Material

The system controls inspect the raw material quality at the first stage in accordance with the test certificate as well as dimensions and appearance.

Material Cutting

This method of making flanges involves cutting stripes from the center plate and rolling them into a circle.


Compared to cast flanges, forged flanges typically contain less carbon and are less likely to corrode. Temperature control, weight measurement, and material grade checking are used in forgings.

Heat Treatment

The total forging cooling speed is the slowest throughout this heat treatment procedure; the standardizing and decreasing cooling speeds are faster.

Final Inspection

Measure and check the flange's dimensions and size using this procedure.

Features of Flanges:

Bolt Holes: Flanges feature evenly spaced bolt holes around the circumference for connecting to other components using bolts and nuts.
Raised Face or Flat Face: Flanges can have a raised face or flat face surface to provide a sealing surface for gaskets, depending on the application requirements.
Types: Common types of flanges include slip-on, weld neck, socket weld, threaded, blind, and lap joint flanges, each designed for specific applications and installation methods.

Applications of Flanges:

Oil and Gas Industry: Flanges are extensively used in upstream, midstream, and downstream operations for connecting pipelines, valves, and equipment.
Chemical Processing: They are employed in chemical plants for connecting process equipment, reactors, pumps, and vessels. Power Generation: Flanges play a critical role in power plants for connecting steam lines, boilers, turbines, and condensers.
Water and Wastewater Treatment: They are used in water distribution systems, sewage treatment plants, and desalination plants.
Shipbuilding: Flanges are vital components in shipbuilding for connecting piping systems, ventilation ducts, and auxiliary machinery.

Advantages of Flanges:

Versatility: Flanges can accommodate various types of connections, including welding, threading, and bolting, providing versatility in piping system design and installation.
Accessibility: Flanges allow for easy access to piping systems for maintenance, repair, and inspection purposes.
Sealing: Properly installed flanges with appropriate gaskets provide reliable sealing, minimizing the risk of leaks and ensuring the integrity of the piping system.
Interchangeability: Flanges of the same size and pressure rating are typically interchangeable, facilitating component replacement and system modification.

Calico Metal Alloy Pvt Ltd stands out as your premier choice for flanges due to our unwavering commitment to quality, reliability, and customer satisfaction. As a leading supplier and exporter, we offer a comprehensive range of flanges meticulously crafted to meet diverse industrial needs. Our products adhere to international standards, ensuring superior performance and durability. With a focus on innovation and excellence, we leverage cutting-edge technology and stringent quality control measures to deliver products of unparalleled precision. Partnering with us guarantees access to top-notch flanges backed by responsive customer support and timely delivery. Trust Calico Metal Alloy Pvt Ltd for your flange requirements and experience unmatched reliability and performance every time.

Flanges Specifications

Standard ASTM A182 / ASME SA182
Dimensions ANSI/ASME B16.5, B16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, GOST Flange, ASME/ANSI B16.5/16.36/16.47A/16.47B, MSS S44, ISO70051, JISB2220, BS1560-3.1, API7S-15, API7S-43, API605, EN1092
Flange Size Chart 1/2" (15 NB) to 48" (1200NB), DN10~DN5000
Pressure Rating Class 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS
Pressure Calculation in DIN 6Bar 10Bar 16Bar 25Bar 40Bar / PN6 PN10 PN16 PN25 PN40, PN64
JIS 16 K, 5K, 10 K, 20 K, 30 K, 40 K, 63 K
Flange Connection / Flange Face Type Raised Face (RF), Ring Type Joint (RTJ), Flat Face (FF), Large Male-Female (LMF), Lap-Joint Face (LJF), Small Male-Female (SMF), Small Tongue, Large Tongue & Groove, Groove, Flange Pipe.
Origin West Europe / Japan / Indian / USA / Korean
Types of Flanges Threaded / Screwed / Forged / Plate
Coating Yellow Transparent, Zinc Plated, Anti-rust Paint, Oil Black Paint, Cold and Hot Dip Galvanized
Production technique Used Heat treated, Forged and Machined
Equipment Press machine, Bending machine, Pushing Machine, Sand-blasting machine, electric bevelling machine etc.
Test Certificates EN 10204/3.1B, Raw Materials Certificate, 100% Radiography Test Report, Third Party Inspection Report, etc

Types Of Flanges


Weld Neck Flange


Blind Flange


Slip on Flange


Socket weld Flange


Spectacle Blind Flange


Threaded Flange


Other Types Of Flanges

Flanges Lap Joint Flange
Long Weld Neck Flange Industrial Flanges
Forged Flanges RTJ Flange
Stainless Steel Plate Flange Square Flange
F51 Flanges F51 SORF Flange
WNRF Flange SWRF Flanges
ASME SA182 Flanges ASTM A182 Flange
Flat Face Flange BS 4504 Flanges
Orifice Flange Groove & Tongue Flanges
ANSI B16.5 Flanges Loose Flange

Flanges Industrial Application

Electrical Industry


Automotive Industry


Construction Industry


Defence Industry


Pharmaceutical Industry


Petroleum Industry


Petrochemical Industry


Milk & Dairy Industry

Milk & Dairy

Export & Supply Destinations Of Flanges

Liechtenstein, Spain, Belarus, Serbia, France, Finland, Bulgaria, Sweden, Latvia, Moldova, Monaco, Azerbaijan, Czechia/Czech Republic, Luxembourg, Belgium, Italy, Austria, Slovakia, Hungary, Greece, Romania, Switzerland, Germany, Turkey, Portugal, Russia, Ireland, Denmark, Lithuania, United Kingdom, Cyprus, Norway, Estonia, Poland, Ukraine, Malta, Croatia, Netherlands.

Sri Lanka, Kuwait, Indonesia, Japan, Taiwan, Israel, Philippines, Myanmar, Macau, Bangladesh, Singapore, Lebanon, Saudi Arabia, Afghanistan, Hong Kong, Iraq, Armenia, Mongolia, Egypt, Qatar, Bhutan, Thailand, Turkey, Bahrain, Maldives, British, North Korea, Nepal, United Arab Emirates, Iran, Kyrgyzstan, South Korea, Malaysia, Azerbaijan, Oman, Vietnam, India, Jordan, China, Russia.

Angola, Liberia, Mauritius, Libya, Mauritania, Eswatini, Mozambique, Namibia, Senegal, Niger, Zambia, Zimbabwe, Tunisia, Central African Republic, Gambia, Kenya, Uganda, Nigeria, Burkina Faso, Morocco, Ethiopia, South Africa, Egypt, Tanzania, Algeria, Madagascar, Rwanda, Botswana, Burundi, Seychelles, Cameroon.

El Salvador, Jamaica, Antigua and Barbuda, Belize, Dominican Republic, Canada, Panama, Costa Rica, Barbados, Bahamas, Haiti, United States of America, Grenada, Honduras, Cuba, Guatemala, Saint Lucia, Saint Vincent and the Grenadines, Nicaragua, Dominica, Trinidad and Tobago, Mexico.

Paraguay, Colombia, Guyana, Suriname, Ecuador, Bolivia, Venezuela, Brazil, Peru, Argentina, Chile, Uruguay.