Hastelloy Threaded Flanges Manufacturer and Supplier in India

Hastelloy threaded flanges are a type of flange made from Hastelloy alloys, which are known for their exceptional corrosion resistance properties. Threaded flanges have internal threads that allow them to be screwed onto the external threads of a pipe or fitting, creating a secure and sealed connection. Hastelloy threaded flanges are circular flanges with internal threads that match the external threads of a pipe or fitting. They are designed to create a tight and reliable connection when threaded onto the pipe, and they normally have a raised face to provide a sealing surface when bolted to another flange or piece of equipment. Some of the benefits of Hastelloy threadedflanges are quick and easy installation, high corrosion resistance and high strength. Due to its benefits, there are various applications like pollution control, offshore and marine, semiconductor industry, petrochemical industry and many more.

Naysha Steel, a prominent hastelloy flanges manufacturer and supplier in Mumbai, India, specializes in Hastelloy threaded flanges. With a strong focus on quality and customer satisfaction, Naysha Steel offers a wide range of Hastelloy threaded flanges that are designed to withstand high temperatures, corrosion, and pressure. Their flanges are precision-engineered using superior-grade Hastelloy materials, ensuring durability and reliability. Backed by a skilled workforce and advanced manufacturing facilities, Naysha Steel delivers top-notch products that meet international standards. Whether for industrial or commercial applications, Naysha Steel is a trusted choice for Hastelloy threaded flanges in India.

alloy steel threaded flanges

Types of Hastelloy Threaded Flanges

Hastelloy Threaded flanges are typically made from a specific grade of Hastelloy alloy, which is a group of nickel-based superalloys known for their outstanding resistance to a wide range of corrosive environments. Hastelloy alloys are composed of various elements such as nickel, molybdenum, chromium, and tungsten, among others, which provide excellent resistance to pitting, crevice corrosion, stress corrosion cracking, and oxidation. The threaded feature of these flanges allows for easy installation and disassembly, making them suitable for applications where frequent maintenance or adjustments are required.

  • Slip-On Flanges: These flanges have a slip-on design, where the flange slides over the pipe and is then welded in place.
  • Weld Neck Flanges: Weld neck flanges have a long tapered hub, which provides reinforcement and allows for easy welding.s feature a ring-type joint groove on the flange face, accommodating a metal ring gasket.
  • Socket Weld Flanges: Socket weld flanges have a socket-like end that fits over the pipe, and they are then welded in place.
  • Threaded Flanges: Threaded flanges have internal threads that match the external threads of the pipe.
  • Lap Joint Flanges: Lap joint flanges consist of two components: a stub end and a loose backing flange.

Features of Hastelloy Threaded Flanges

  • Hastelloy Threaded flanges exhibit excellent resistance to corrosion, including pitting, crevice corrosion, and stress corrosion cracking.
  • Hastelloy alloys are known for their exceptional strength, allowing the flanges to withstand high pressure and temperature conditions without deformation or failure.
  • Hastelloy Threaded flanges are available in various sizes, pressure ratings, and dimensions, making them versatile for different piping systems and applications.
  • The threaded feature of these flanges enables easy installation and disassembly, providing convenience for maintenance and repairs.
  • Hastelloy alloys have excellent thermal stability and can withstand high-temperature environments, making Hastelloy Threaded flanges suitable for applications involving elevated temperatures.

Size of Hastelloy Threaded 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 Threaded Flanges

Hastelloy Threaded flanges are widely utilized in industries that handle corrosive substances and operate in demanding environments. Their exceptional resistance to corrosion makes them suitable for applications in chemical processing plants, where they are used to connect pipes, valves, and other equipment carrying aggressive chemicals such as acids, alkalis, and solvents.

Quality of Hastelloy Threaded Flanges

High-quality Hastelloy Threaded flanges exhibit several essential characteristics. Firstly, they are manufactured using top-grade Hastelloy alloys, ensuring superior corrosion resistance and mechanical strength. These alloys are carefully selected and undergo stringent quality control measures to meet industry standards and specifications. The flanges are precision-engineered with precise dimensions, ensuring a proper fit and leak-free connection.

Hastelloy Threaded 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 Threaded Flanges Specifications

Specification Of : Hastelloy Threaded Flange
Dimensions ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings
Size 1/2" (15 NB) to 48" (1200NB)
Pressure 150# To 2500#
Class 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS, DIN Standard ND-6,10, 16, 25, 40 etc.
JIS 5K, 10K, 16K, 20K, 30K, 40K, 63K
DIN DIN2527, DIN2566, DIN2573, DIN2576, DIN2641, DIN2642, DIN2655, DIN2656, DIN2627, DIN2628, DIN2629, DIN 2631, DIN2632, DIN2633, DIN2634, DIN2635, DIN2636,DIN2637, DIN2638, DIN2673
BS BS4504 , BS4504, BS1560, BS10
Flange Face Type RTJ/ FF/ RF/ lap joint/ Male & Female / Tongue & Groove.
Standard Materials Duplex Steel & Super Duplex Steel, Copper Nickel, Wrought Iron, Inconel, Mild Steel, Stainless Steel, Hastelloy, Cast Iron, Alloy Steel, Carbon Steel.
Thickness Length NPS 1/2" To NPS 48”
Manufacturing Process Forged/Casting/Cutting/Rolling
Other Type Of Flange Forged/Plate/Threaded/Screwed
Coating/Surface Treatment Antirust Paint, Oil Black Paint, Yellow Transparent, Zinc Plated, Cold and Hot Dip Galvanized
Application Bitumen upgraders
Heavy oil refineries
Nuclear power (mostly seamless)
Petrochemicals and acids

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

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

Frequently Asked Questions

What is a Hastelloy threaded flange?

A Hastelloy threaded flange is a type of pipe flange with internal threads designed to screw onto the external threads of a pipe or fitting. It provides a strong and secure connection without the need for welding.

How are Hastelloy threaded flanges installed?

Installation involves screwing the threaded flange onto the external threads of the pipe or fitting using a compatible thread sealant or tape. Proper tightening procedures are essential to ensure a reliable seal.

How can I ensure the proper selection and installation of Hastelloy threaded flanges?

To ensure correct selection and installation, consult with Nayasha Steel for assessing your specific application requirements, including fluid properties, temperature, and pressure conditions. We provide proper guidance on material selection, sizing, and proper installation procedures.

Are there any specific standards or specifications that govern the manufacturing of Hastelloy threaded flanges?

The manufacturing of Hastelloy threaded flanges should adhere to industry standards such as ASME B16.5, ASME B16.11, and ASME B16.25. Complying with these standards ensures proper design and performance.

Industries served by Hastelloy Threaded 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