Hastelloy Blind Flanges Manufacturer and Supplier and in India

Hastelloy blind flanges are a type of flange made from Hastelloy alloys, known for their exceptional corrosion resistance properties. Blind flanges, also called as blank flanges, are used to seal the end of a pipe or vessel, effectively closing it off. Hastelloy blind flanges are circular, flat-faced flanges with no internal bore or raised face. They are solid discs with bolt holes around the perimeter. These flanges are manufactured to be bolted to the open end of a pipe or vessel, effectively blocking off the flow and providing a seal. Hastelloy blind flanges find applications in various industries and situations where it is necessary to close off the end of a pipe or vessel securely, while also providing corrosion resistance. Some of the typical applications are pressure vessels, piping systems, tank and reactor end caps, isolation of equipment, hydrostatic testing, flange covers and protectors, and others.

Naysha Steel is a renowned Hastelloy blind flanges manufacturer and supplier based in Mumbai, India. With a strong commitment to quality and customer satisfaction, Naysha Steel delivers top-notch products for various industrial applications. Their extensive range of Hastelloy blind flanges is designed to meet international standards, ensuring durability and corrosion resistance. The company's expertise lies in producing customized flanges to meet specific requirements. With a dedicated team of professionals and state-of-the-art manufacturing facilities, Naysha Steel is the trusted choice for reliable Hastelloy flanges manufacturer in India.

stainless steel blind hastelloy flanges manufacturer

Types of Hastelloy Blind Flanges

One common type is the Raised Face blind flange, which has a raised face on the sealing surface. This design helps create a tight seal when the flange is bolted to another flange or a blind plate. RF blind flanges are commonly used in low-pressure systems. Another type is the Flat Face blind flange, which has a flat sealing surface. FF blind flanges are typically used in applications where the flange needs to be flush with the adjoining surface, such as in certain piping systems or equipment.

  • Raised Face (RF) Blind Flanges: These flanges have a raised face on the sealing surface, providing a ridge for better alignment and sealing when bolted to another flange or blind plate.
  • Flat Face (FF) Blind Flanges: Blind flanges have a flat sealing surface, making them suitable for applications where the flange needs to be flush with the adjoining surface, such as certain piping systems or equipment.
  • Tongue and Groove (T&G) Blind Flanges: Blind flanges feature a raised tongue on one flange and a matching groove on the other.
  • Ring Type Joint (RTJ) Blind Flanges: Blind flanges utilize a metal ring gasket to provide a reliable and high-pressure seal.
  • Lap Joint Blind Flanges: Lap joint blind flanges consist of two components: a stub end and a loose backing flange.

Features of Hastelloy Blind Flanges

  • Hastelloy blind flanges exhibit excellent resistance to corrosion, including pitting, crevice corrosion, and stress corrosion cracking. This makes them suitable for use in aggressive environments and corrosive media.
  • Hastelloy alloys used in the manufacturing of blind flanges provide exceptional strength, allowing them to withstand high pressure and temperature conditions without deformation or failure.
  • Blind flanges are designed to provide a tight and leak-proof seal when installed correctly.
  • Hastelloy blind flanges are available in various sizes, pressure ratings, and dimensions, making them versatile for different piping systems and applications.
  • These flanges can withstand a wide range of temperatures, making them suitable for applications involving both high and low temperature conditions.

Size of Hastelloy Blind Flanges

Nominal Size Outside Diameter
Min. Thickness
RF Dia.
No. of Bolt Holes Diameter of Holes Bolt Circle
SO Bore ID
WN Bore ID
Dia. Hub Base
Dia. of Hub Top
12 3.50 0.38 1.38 4 0.62 2.38 0.88 0.62 1.19 0.84 0.56 1.81
34 3.88 0.44 1.69 4 0.62 2.75 1.09 0.82 1.50 1.05 0.56 2.00
1 4.25 0.50 2.00 4 0.62 3.12 1.36 1.05 1.94 1.32 0.62 2.12
114 4.62 0.56 2.50 4 0.62 3.50 1.70 1.38 2.31 1.66 0.75 2.19
112 5.00 0.62 2.88 4 0.62 3.88 1.95 1.61 2.56 1.90 0.81 2.38
2 6.00 0.69 3.62 4 0.75 4.75 2.44 2.07 3.06 2.38 0.94 2.44
212 7.00 0.81 4.12 4 0.75 5.50 2.94 2.47 3.56 2.88 1.06 2.69
3 7.50 0.88 5.00 4 0.75 6.00 3.57 3.07 4.25 3.50 1.12 2.69
312 8.50 0.88 5.50 8 0.75 7.00 4.07 3.55 4.81 4.00 1.19 2.75
4 9.00 0.88 6.19 8 0.75 7.50 4.57 4.03 5.31 4.50 1.25 2.94
5 10.00 0.88 7.31 8 0.88 8.50 5.66 5.05 6.44 5.56 1.38 3.44
6 11.00 0.94 8.50 8 0.88 9.50 6.72 6.07 7.56 6.63 1.50 3.44
8 13.50 1.06 10.62 8 0.88 11.75 8.72 7.98 9.69 8.63 1.69 3.94
10 16.00 1.12 12.75 12 1.00 14.25 10.88 10.02 12.00 10.75 1.88 3.94
12 19.00 1.19 15.00 12 1.00 17.00 12.88 12.00 14.38 12.75 2.12 4.44
14 21.00 1.31 16.25 12 1.12 18.75 14.14 13.25 15.75 14.00 2.19 4.94
16 23.50 1.38 18.50 16 1.12 21.25 16.16 15.25 18.00 16.00 2.44 4.94
18 25.00 1.50 21.00 16 1.25 22.75 18.18 17.25 19.88 18.00 2.62 5.44
20 27.50 1.62 23.00 20 1.25 25.00 20.20 19.25 22.00 20.00 2.81 5.62
22 29.50 1.75 25.25 20 1.38 27.25 22.22 21.25 24.25 22.00 3.07 5.82
24 32.00 1.81 27.25 20 1.38 29.50 24.25 23.25 26.12 24.00 3.19 5.94

Uses of Hastelloy Blind Flanges

Hastelloy blind flanges find extensive use in industries that require secure closure and protection against leakage. One primary application is in chemical processing plants, where these flanges are employed to seal off the ends of pipes and vessels that carry corrosive chemicals. Their exceptional corrosion resistance ensures the integrity of the system and prevents leakage of hazardous substances.

Quality of Hastelloy Blind Flanges

High-quality Hastelloy blind flanges are manufactured with precision and attention to detail. They are constructed from top-grade Hastelloy alloys, known for their excellent corrosion resistance properties. These alloys undergo rigorous testing and quality control measures to ensure they meet industry standards and specifications. Quality hestelloy flanges are manufactured using advanced techniques and state-of-the-art machinery, ensuring precise dimensions, smooth surfaces, and accurate sealing surfaces.

Hastelloy Blind Flanges Manufacturer : Grades & Classes

  • Hastelloy C276
  • Hastelloy C22
  • Hastelloy B2
  • Hastelloy X
  • Hastelloy C2000
  • Class 150
  • Class 300
  • Class 600
  • Class 900
  • Class 1500
  • Class 2500

Hastelloy Blind Flanges Specifications

Specification Of : Hastelloy Blind Flange
JIS Standards 5K, 10K, 40K, 16K 20K 30K, 63K
Size Of Bore Diameter Flange NPS ≤ 10
Manufacturer Of Standard Dimensions ASME B16.36 Flange, DIN Flange, AWWA C207 Flange, B16.47 Series A & B Flange, BS1560-3.1 Flange, EN-1092 Flange, ASME B16.48 Flange, API605 Flange, BS4504 Flange, EN1092 Flange, UNI Flange, ISO Flange, MSS S44 Flange, IS 2062 Flange, ISO70051 Flange, API Flange, API7S-43 Flange, API7S-15 Flange.
Minimum Pressure 150 LB To 2500 LB
High Temperature Chart Above 200° Celsius (400°F) For 150 Class Or Above 400° Celsius (750°F)
Flange Face Type Groove And Small Tongue Groove, RTJ, Flat Face, Lap-Joint Face, Raised Face, Large Tongue & Large Male-Female And Small Male-Female
Top Six Type Of Flange Threaded Flange, Lap Joint Flange, Socket-Weld Flange, Blind Flange, Slip-On Flange, Weld Neck Flange
Standard Materials Cast Iron, Inconel, Mild Steel, Stainless Steel, Alloy Steel, Carbon Steel, Duplex Steel & Super Duplex Steel, Hastelloy, Copper Nickel, Wrought Iron.
Thickness Length NPS ≤ 18
Size (1/2") To (48")
Manufacturing Process Forged/ Machined/ Heat Treated
Other Type Of Flange Forged/ Plate/ Threaded
Application Power Plants Industry
Food Processing And Manufacturing
Waterworks Systems
Nuclear Power Application
Municipal Pipe Systems
Fossil Fuel Power Plants
Oil And Gas Industry

Please find below our manufacturing and Sales network below: (Contact us for detailed information for your nearest branches)

  • Hastelloy Blind Flanges manufacturer and contractor in Hyderabad
  • Hastelloy Blind Flanges manufacturer and supplier in Chennai
  • Hastelloy Blind Flanges manufacturer and stockists in Pune
  • Hastelloy Blind Flanges manufacturer and dealer in Faridabad
  • Hastelloy Blind Flanges manufacturer and warehousing in Chandigarh
  • Hastelloy Blind Flanges manufacturer and wholesalor in Delhi
  • Hastelloy Blind Flanges manufacturer and trader in Coimbatore
  • Hastelloy Blind Flanges manufacturer and stockholder in Bangalore

Frequently Asked Questions

What is a Hastelloy blind flange?

A Hastelloy blind flange is a solid, flat-faced flange with no bore (opening) in the center. It is designed to cap the end of a pipe or vessel to block the flow of fluids and provide closure in piping systems.

What are the benefits of using Hastelloy blind flanges?

The benefits are corrosion resistance, high-temperature resistance and durability.

What are the common applications of Hastelloy blind flanges?

Hastelloy blind flanges are commonly used in industries such as chemical processing, petrochemical, oil and gas, pharmaceuticals, and pulp and paper, where the blocking of pipe ends or vessel openings is necessary to maintain safety and system integrity.

Which types of Hastelloy alloys are typically used for blind flanges?

The choice of Hastelloy alloy depends on the specific application and the corrosive environment. Commonly used alloys include Hastelloy C276, C22, B2, and others.

Industries served by Hastelloy Blind Flanges

In the oil and gas industry, blind Alloy Steel flanges are used in pipelines, storage tanks, and offshore platforms. They are employed for closing off openings during maintenance, repair, or when a branch connection is not required. Petrochemical plants utilize blind Alloy Steel flanges in equipment such as reactors, distillation columns, and storage vessels. These flanges provide a secure and leak-proof seal when closing off unused openings or isolating sections of the process.

oil gas manufacturer
Oil and Gas Industries

The oil and gas industry includes a wide range of from drilling and production to refining and marketing. Some of the major players in this include oil and gas companies, service providers, equipment.

petroleum manufacturer supplier
Petroleum Industries

In the drilling process, stainless steel is used to make drill bits, pipes, and other equipment that must withstand high pressures and temperatures. Stainless steel is also used to make pumps, valves, and fittings for the transportation.

chemical flanges
Shipbuilding in India

In storage applications, stainless steel is used to make tanks and containers that can safely store corrosive and hazardous chemicals. It is also used in piping systems for chemical transfer and distribution chemical industry.

Marking & Pricing

Products are packaged to ensure that there is no damage during of goods transport. In case of exports, standard export packaging is done with utmost care in wooden covering or boxing. All products are marked with Grade, Lot No, Size, Degree and our trade mark. On special requests we can also, make customized marking on our products.

Quality Assurance

At Naysha Steel, all fittings and flanges are subject to strict inspection at each and every stage of the production process, from starting material purchasing to product dispatch. They are visually examined for compliance to ASTM, ASME, MSS, DIN, EN, and JIS codes and standards. Upon request, official certified Inspection Agencies can be called in to witness the material reports, dimensions and quality compliance of products.

Test Certificates: Manufacturer Test Certificate as per EN 10204 / 3.1B Raw Materials Certificate, 100% Radiography Test Report, Third Party Inspection Report