317L Round Bar

Spectacle Blind Flanges 316/316L


Stainless Steel Spacer Blind Flanges, Stainless Steel 304 Spectacle Blind Flanges, Stainless Steel 316 Spectacle Blind Flanges, Stainless Steel Ring Type Joint Spectacle Blind Flange, ANSI B16.5 Spectacle Blind Flanges, ASTM A182 Stainless Steel Spectacle Blind Flanges Manufacturer In India.

Largest Stockholder Of Stainless Steel Spectacle Blind Flanges In India, Uns S30400 Spectacle Blind Flanges, Ready Stock Of Stainless Steel Spectacle Blind Flanges, Smo 254 Plate Spectacle Blind Flanges, Competitive Price Of Stainless Steel Spectacle Blind Flanges, Uns S30403 Spectacle Blind Flanges, 316 Stainless Class 150 Spectacle Blind Flange Trader, Ss 316L Spacer Blind Flanges, 1.4301, 1.4306 Spectacle Blind Flange, ANSI B16.5 Ss 304 Spectacle Blind Flanges Manufacturers In Mumbai, India.

Detailed Information:

As a professional manufacturer and exporter of 316/316L Stainless Steel spectacle blind flanges, RatnaExports.com offers precision machining services. We manufacture 316/316L Stainless steel spectacle blind flanges as per ANSI B16.5, DIN Standard, and EN1092-1 in sizes between 1/2″ and 60″ NPS. In the manufacturing process of 316 and 316L stainless steel products, a nonmagnetic solid solution of ferric carbide or carbon in iron is applied to provide corrosion resistance to these stainless steel products. Among the metals we manufacture are carbon steel, stainless steel, high nickel alloys, duplex/super duplex, copper-nickel, and titanium alloys.

One of the leading manufacturers of Stainless Steel spectacle blind flanges 316 in Mumbai, India, is RatnaExports.com. We achieve good corrosion-resistant properties; Stainless Steel spectacle blind flanges make of a super austenitic material with low carbon content. The application includes utility scrubber assemblies that make from stainless steel. A research center in our company allows us to gather the necessary knowledge about the latest technologies and keep improving the quality of our products with each new research project we conduct.

There are many Stainless Steel Spacer Blind Flanges Suppliers in Mumbai, India, and RatnaExports.com India is one of them. There are several characteristics included in the specification of Stainless Steel 316 Spectacle Blind Flanges, including materials, dimensions, pressure, temperature rating, tolerances, marking, and testing, as well as methods for determining the openings for flanged fittings and pipe flanges. 

In addition to providing Stainless Steel flanges of different standards, we are one of the leading suppliers of Stainless Steel tongue and groove flanges.

We are one of the largest stockists and distributors of Spectacle Blind Flanges 316 on the RatnaExports.com website, one of the largest online suppliers of this product. We are committed to providing the highest quality of industry-standard goods by sourcing the finest raw materials. Because they have one solid end and one open end, Stainless Steel Spectacle Blind Flanges are pressure-preserving plates. 

In the meantime, these Carbon Steel Spectacle Blind Flanges are used in particular states at length, with their real advantage being that they can be attached to the pipe without welding. Several industries use spectacle blind flanges, including shipbuilding, electricity production, petrochemical plants, oil rigs, wastewater treatment plants, processing plants, pharmaceutical plants, and many more.

Because we can customize super duplex Steel Spectacle Blind Flanges to fit the exact specifications provided by our esteemed customers in terms of both size and width, we can customize them to suit the exact requirements. We can meet their precise specifications concerning both length and width. We offer a wide range of high nickel alloy spectacle blind flanges of the highest quality, and they are available at an industry-leading price. Depending on your needs, you can order our blind spec flanges with raised, flat, or RTJ faces, depending on the type of flange you need.

There are three different types of forms flanges made from plates:

As a result, We apply all three flanges in piping systems or pressure vessels where it may be necessary to disrupt the flow occasionally. They are mounted between two pipe flanges and can be modified or ‘swung’ in and out of position after installation. With the help of a screw inserted into the hole in the bridge or paddle, they can be moved between two pipe flanges to disrupt or allow the flow, depending on the user’s preference.

Spectacle Blind Flange 316/316L Specification


ASME B16.5 Spectacle Blind Flange Size Chart 1/2″ (15 NB) to 48″ (1200NB) DN10~DN5000
Spectacle Blind Flange Standards 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
Spectacle Blind Flange Pressure Rating ANSI Class 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS
Spectacle Blind Flange Pressure Calculation in DIN 6Bar 10Bar 16Bar 25Bar 40Bar / PN6 PN10 PN16 PN25 PN40, PN64
JIS 5K, 10 K, 16 K 20 K, 30 K, 40 K, 63 K
UNI 6Bar 10Bar 16Bar 25Bar 40Bar
EN 6Bar 10Bar 16Bar 25Bar 40Bar
Coating Oil Black Paint, Anti-rust Paint, Zinc Plated, Yellow Transparent, Cold and Hot Dip Galvanized
Most common types of Spectacle Blind Flange Forged / Threaded / Screwed / Plate
Test Certificates

EN 10204/3.1B

Raw Materials Certificate

100% Radiography Test Report

Third-Party Inspection Report, etc

Production technique
  • Forged, Heat treated, and machined
Connect Type/ Flange Face Type Flange Finish Types: 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
Special design

As per your drawing


15 NB (1/2″) to 200 NB (8″)

Equal and Reducing Configurations

Test Direct-reading Spectrograph, Hydrostatic testing machine, X-ray detector, UI transonic flaw detector, Magnetic particle detector
Equipment Press machine, Bending machine, Pushing Machine, electric bevelling machine, Sand-blasting machine, etc.
Origin Indian / West Europe / Japan / USA / Korean
Manufacturer of


Spectacle Blind Flange: -BS Flange, EN Flange, API 6A Flange, ANSI Flange, ASME Flange, DIN Flange, EN1092-1 Flange, UNI Flange, JIS/ KS Flange, BS4504 Flange, GB Flange, AWWA C207 Flange, GOST Flange, PSI Flange

  • B.S: BS4504, BS3293, BS1560, BS10
  • AS 2129: Table D; Table E; Table H
  • ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings
  • ANSI: ANSI B16.5, ANSI B16.47(API605), MSS SP44, ANSI B16.36, ANSI B16.48
  • ANSI B16.5, ANSI B16.47, MSS SP44, ANSI B16.36, ANSI B16.48
  • American Standard (ANSI)
  • German (DIN)
  • British standard (BS)
  • DIN: DIN 2527, DIN 2566, DIN 2573, DIN 2576, DIN 2641, DIN 2642, DIN 2655, DIN 2656, DIN 2627, DIN 2628, DIN 2629, DIN 2631, DIN 2632, DIN 2633, DIN 2634, DIN 2635, DIN 2636, DIN 2637, DIN 2638 Spectacle Blind Flange
  • The other standard: AWWA C207; EN1092-1, GOST12820, JIS B2220; KS B1503, SABS1123; NFE29203; UNI2276
Spectacle Blind Flange Uses & application
  • Bitumen upgraders.
  • Heavy oil refineries.
  • Nuclear power (mostly seamless).
  • Petrochemicals and acids.


Spectacle Blind Flanges 316/316L Chemical Composition












0.08 max

2 max

1.0 max

0.045 max

0.030 max

16.00 – 18.00

2.00 – 3.00

11.00 – 14.00

67.845 min

Spectacle Blind Flanges 316/316L Mechanical Properties

Grade Density Melting Point Tensile Strength Yield Strength (0.2%Offset) Elongation
316 8.0 g/cm3 1400 °C (2550 °F) Psi – 75000, MPa – 515 Psi – 30000, MPa – 205 35%

Spectacle Blind Flanges 316/316L Equivalent Grades










SS 316

1.4401 / 1.4436


SUS 316

316S31 / 316S33


X5CrNiMo17-12-2 / X3CrNiMo17-13-3


Types of Spectacle Blind Flanges

Spectacle Blind Flat Face Flanges

SS Spectacle Blind Flat Face Flanges

Stainless Steel 304 Spectacle Blind  Flange FF

SS 316 Flat Face Spectacle Blind Flanges manufacturers

Stainless Steel ASME b16.47 Series A Spectacle Blind FF Flanges Supplier

SS Spectacle Blind Flat Face Flanges dimensions

ASTM A182 Stainless Steel Spectacle Blind Flat Face Flange

Spectacle Blind Raised Face  Flanges

Hastelloy Spectacle Blind RF Flanges Stockist C22 Hastelloy Spectacle Blind Raised Face Flanges

Hastelloy Alloy C276 Spectacle Blind Raised Face Flanges Supplier in India

Hastelloy Spectacle Blind Raised Face Flanges Suppliers

Spectacle Blind Flanges

Spectacle Blind Raised Face Blind Flanges

600 Alloy Spectacle Blind Flanges Suppliers

Spectacle Blind Flange Manufacturer in India

Inconel 600 Spectacle Blind Flanges

Inconel Alloy 601 Blind Flange

Spectacle Blind Flanges Dealer

Spectacle Blind Flange

Incoloy® Spectacle Spectacle Blind Flange

Spectacle Blind Flange

Alloy WERKSTOFF ASME b16.47 Spectacle Blind Flange

ASTM B462 Spectacle Spectacle Blind Flange

Spectacle Spade Flange

Incoloy® Spectacle Spade Flange

Alloy WERKSTOFF ASME b16.47 Spade Flange

ASTM B462 Spectacle Spade Flange


Why Choose RatnaExports.com as Your Source for 316 Spectacle Blind Flanges

  • More than 30 years of experience in purchasing and selling stainless steel 316/316L spectacle blind flanges in India and worldwide.
  • We can give you materials from either stock or mill deliveries with the shortest manufacturing time.
  • We believe in making new customers every day and always help you with the best prices, quality, and complete traceability of materials.
  • We have an annual sales volume of over 5000 tons of various steel products and have tie-ups with many mills across the globe.
  • We can offer Ex-works, FOB, CFR, CIF, and Door-to-Door Delivery prices. Let us do the shipping because it will be cost-effective and efficient.

Documents – Provided for all Our Supplied 316/316L Spectacle Blind Flange & Other Products

  • Certificate of Origin legalized/attested by Chamber of Commerce or Embassy
  • Commercial Invoice, including HS Code
  • Packing List including the number of boxes, net weight, and gross weight, Marks, and Numbers
  • Fumigation Certificates
  • Letter of Guarantee
  • Material Test Certificates as per EN 10204 3.1, EN 10204 3.2
  • Raw Material Test Reports
  • Heat Treatment Charts
  • Quality Assurance Plan (QAP)
  • NABL-approved Laboratory Test Reports

Testings (Destructive, Non Destructive) for Various Products

  • Positive Material Identification – PMI Testing
  • Chemical Analysis – Spectro Analysis
  • Mechanical Testing Such as Tensile, Elongation, Reduction of Area
  • Micro Test
  • Macro Test
  • Hardness Test
  • Pitting Resistance Test
  • Intergranular Corrosion (IGC) Test
  • Flaring Test
  • Flattening Test
  • Hydrostatic Test
  • Hydrogen-Induced Cracking (HIC) Test, NACE TM0284
  • Sulfide Stress Corrosion Cracking (SSC), NACE TM 0177
  • Radiography Test
  • Dye Penetrant Test (DP Test)
  • Ultra Sonic Test (UT)
  • Eddy Current Testing
  • Impact Test
  • Bend Test

Packing of Materials – Domestic & International Shipments of Steel Products

  • To ensure safe delivery to the final destination, we take good care of the packaging of the consignment, especially in the case of international shipments where the consignment has to pass through several transit channels before reaching the final destination.
  • We pack our goods in various ways depending on the products. The different ways our products pack are:
    • Wooden Boxes
    • Wooden Pallets

Steel Products are Marking

  • Our supply test certificates will have complete information regarding the marking of all our products.
  • To cut pieces of Pipes, Sheets, or Round Bars, the marking is transferred from the product from which it is cut. In such cases, we provide a Letter confirming the marking transfer and a picture of the product from which it is cut.

Delivery Time:

  • It takes two working days from receipt of advance payment for the shipment to be cleared and sent to the port if the items are in stock.
  • When the items are unavailable in stock, the time it takes to manufacture them will depend on the item’s size, quantity, and grade.
  • Nevertheless, we can claim that we can compete with anyone in India on delivery time, and our production time is usually the shortest.
  • The company is connected with strong logistic partners in India that can handle any type of shipping activity and ensure that there is no delay in the shipment of goods.

Application of Stainless Steel Spectacle Blind Flanges 316/316L

  • Stainless Steel Spectacle Blind Flanges 316 used in Chemical Industry
  • Stainless Steel Spectacle Blind Flanges 316 used in Plumbing
  • Stainless Steel Spectacle Blind Flange 316 used in Mechanical Industry
  • Stainless Steel Spectacle Blind Flanges 316 used in Oil and Gas Pipeline
  • Stainless Steel Spectacle Blind Flanges 316 used in General Purpose Applications
  • Stainless Steel Spectacle Blind Flanges 316 used in Petrochemical Industry

Countries We Export:

Afghanistan, Albania, Algeria, Andorra, Angola, Antigua-Barbuda Argentina, Armenia, Australia, Austria, Azerbaijan, Bahamas, Bahrain, Bangladesh, Barbados, Belarus, Belgium, Belize, Benin, Bhutan, Bolivia, Bosnia-Herzegovina, Botswana, Brazil, Brunei, Bulgaria, Burkina-Faso, Burundi, Côte d’Ivoire, Cabo Verde, Cambodia, Cameroon, Canada, Central African Republic, Chad, Chile, China, Colombia, Comoros, Congo (Congo-Brazzaville), Costa-Rica, Croatia, Cuba, Cyprus, Czechia (Czech Republic), Democratic Republic of the Congo, Denmark, Djibouti, Dominica, Dominican Republic, Ecuador, Egypt, El Salvador, Equatorial Guinea, Eritrea, Estonia, Eswatini (fmr. “Swaziland”), Ethiopia, Fiji, Finland, France, Gabon, Gambia, Georgia, Germany, Ghana, Greece, Grenada, Guatemala, Guinea, Guinea-Bissau, Guyana, Haiti, Holy See, Honduras, Hungary, Iceland, India, Indonesia, Iran, Iraq, Ireland, Israel, Italy, Jamaica, Japan, Jordan, Kazakhstan, Kenya, Kiribati, Kuwait, Kyrgyzstan, Laos, Latvia, Lebanon, Lesotho, Liberia, Libya, Liechtenstein, Lithuania, Luxembourg, Madagascar, Malawi, Malaysia, Maldives, Mali, Malta, Marshall Islands, Mauritania, Mauritius, Mexico, Micronesia, Moldova, Monaco, Mongolia, Montenegro, Morocco, Mozambique, Myanmar (formerly Burma), Namibia, Nauru, Nepal, Netherlands, New Zealand, Nicaragua, North Korea, North Macedonia, Norway, Oman, Pakistan, Palau, Palestine-State, Panama, Papua, New Guinea, Paraguay, Peru, Philippines, Poland, Portugal, Qatar, Romania, Russia, Rwanda, Saint Kitts and Nevis, Saint Lucia, Saint Vincent and the Grenadines, Samoa, San Marino, Sao Tome and Principe, Saudi Arabia, Senegal, Serbia, Seychelles, Sierra Leone, Singapore, Slovakia, Slovenia, Solomon Islands, Somalia, South Africa, South Korea, South Sudan, Spain, Sri Lanka, Sudan, Suriname, Sweden, Switzerland, Syria, Tajikistan, Tanzania, Thailand, Timor-Leste, Togo, Tonga, Trinidad and Tobago, Tunisia, Turkey, Turkmenistan, Tuvalu, Uganda, Ukraine, United Arab Emirates, United Kingdom, United States of America, Uruguay, Uzbekistan, Vanuatu, Venezuela, Vietnam, Yemen, Zambia, Zimbabwe.

Cities We Supply:

London, New-York, Paris, Moscow, Tokyo, Dubai, Singapore, Barcelona, Los-Angeles, Madrid Rome, Chicago, Toronto, San-Francisco, Abu-Dhabi, St-Petersburg, Amsterdam, Berlin Prague, Washington,Istanbul, Las-Vegas, Doha, Seoul, Sydney, Beijing,  Miami, Munich, Milan, San-Diego, Bangkok, Vienna, Dublin, Vancouver, Boston,  Zurich,  Melbourne, Budapest, Houston, Seattle, Montreal, Hong-Kong, Frankfurt, Sao-Paulo, Tel-Aviv, Copenhagen, Calgary, Orlando, Atlanta, Dallas, Hamburg, Osaka, Lisbon, Austin, Phoenix Naples, Oslo, Denver, Stockholm, Riyadh, Delhi, Buenos Aires, San-Jose, Brussels, Portland Philadelphia, Ottawa, Helsinki, Valencia, Brisbane, Warsaw, Minneapolis, Shanghai, Lyon, Adelaide, Edmonton, Marseille, Muscat, Athens, Stuttgart, Rio-De-Janeii, Baltimore, Auckland, Cologne, New-Orlean, Kuwait-City,  Kiev, Hanover, Perth, Minsk, Bucharest, Nashville, Dusseldorf, Manchester, Sacramento, Glasgow, Mexico-City, Salt-Lake-Ci, Raleigh, Cracow