Stainless Steel Blind Flanges Manufacturer and Supplier In India

A stainless steel blind flange is a type of pipe flange used in piping systems and industrial applications. It serves as a solid, flat plate with no central opening or bore, hence the term "blind". Blind flanges are used for sealing the end of a pipe or vessel and are bolted to the end of the pipe to close it off. Stainless steel blind flanges are typically made from stainless steel materials known for their excellent corrosion resistance and toughness. These flanges are characterized by their flat, solid face without any openings. They have bolt holes around the perimeter that allow them to be safely connected to the end of a pipe or vessel using bolts and nuts. The applications are isolation and sealing, pressure vessels, oil and gas industry, water treatment plants and many more.

Naysha Steel, a stainless steel blind flanges manufacturer and supplier in Mumbai, India, offers first-rate quality products for distinct industrial applications. With a goal to aim towards excellence, we deliver flanges made from prime grades 310 stainless steel flange, ensuring strength and trust. Our skill, advanced manufacturing facilities, and firm quality control measures make us a trusted choice for clients seeking first-grade 316 stainless steel blind flange in Mumbai, India.

stainless steel blind flanges

Types of Stainless Steel Blind Flanges

Our Raised Face Blind Flanges made of stainless steel feature a raised section around the flange face. Our design of blind flanges helps to create a tight seal when the flange is bolted to the pair of flange or equipment, minimizing the risk of leaks. Our a240 flat flanges have a flat surface without any raised sections. These flanges are used when a smooth, even connection is required, such as in uses where the flange needs to fit against a flat surface or gasket.

  • Raised Face Blind Flanges: Our blind flanges have a raised face around the sealing surface, which provides a better sealing surface for gaskets and helps prevent leakage.
  • Flat Face Blind Flanges: Our flat face stainless steel blind flanges have a flat sealing surface without any raised features.
  • Ring Type Joint (RTJ) Blind Flanges: Our RTJ blind flanges are designed to work with ring-type joint gaskets
  • Paddle Blind Flanges: Our paddle blind flanges are used for temporary isolation or blind-off applications.
  • Spectacle Blind Flanges: Our spectacle blind flanges made from stainless steel are a combination of a blind flange and a spacer.

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Features of Stainless Steel Blind Flanges

  • Stainless Steel Blind flanges are designed to provide a solid seal, blocking off the end of a pipe or vessel.
  • Stainless steel blind flanges are suitable for a wide range of applications and uses across industries.
  • Stainless steel blind flanges are appropriate with various piping systems and parts, allowing for easy combination into existing infrastructure.
  • Stainless steel blind flanges are designed to cope with high-pressure and high-temperature conditions.
  • Stainless steel blind flanges come with different face structure, including raised face, flat face, or ring-type joint (RTJ).
  • Blind flanges are relatively simple to install, making them acceptable for temporary or permanent closing of pipes or vessels
  • Stainless steel blind flanges can be custom-made to meet special project requirements.
  • Stainless steel blind flanges can be manufactured and supplied in many types like blank flange dn 40 cf stainless steel 304l and various sizes like 6 stainless steel flange.

Size of Stainless Steel 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 Stainless Steel Blind Flanges

Blind flanges are commonly used in pipeline systems to seal off the end of a pipe. They are utilized during maintenance and repair activities, where temporary closure or isolation of a section of the pipeline is required. Stainless steel blind flanges are used in the construction of pressure vessels and tanks. They provide a secure seal, ensuring the integrity of the vessel or tank and preventing leakage or spillage.

Quality of Stainless Steels Blind Flange

We take pride in manufacturing high-quality stainless steel blind flanges from top-grade stainless steel, such as stainless steel 317 flanges. These materials offer are corrosion-proof, durable, and strong, making them suitable for tough conditions and ensuring long-term and efficient performance. We manufacture and supply Stainless steel Blind Flanges in compliance with recognized industry standards, such as ASME B16.5 or ASME B16.47.

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Call us on: +91 9920190192
Call us on: [email protected]
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Stainless Steel Blind Flanges Manufacturer : Grades & Classes

  • Grade 304/304L
  • Grade 316/316L
  • Grade 317/317L
  • Grade 321/321H
  • Grade 347 stainless steel flanges/347h stainless steel flanges
  • Class 150
  • Class 300
  • Class 600
  • Class 600
  • Class 900
  • Class 1500

Stainless Steel Blind Flanges Specifications

Specification Of : Stainless Steel 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)

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

Frequently Asked Questions

What grades are available for blind flanges?

Common stainless steel materials include 304, 316, 321, and other grades. The choice of stainless steel grade depends on the specific application and the required corrosion resistance.

What kind of services does Naysha Steel provide?

Haysha Steel is well known manufacturer and supplier of stainless steel, copper and other metal products in India.

What are the standard sizes available for stainless steel blind flanges?

Stainless steel blind flanges are available in various sizes, typically ranging from small diameters to larger ones, to accommodate various pipe sizes.

Industries served by Stainless Steel 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