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Blind Flanges

For essential pipe-end sealing and pressure containment across a wide range of industries, Blind Flanges from Fortis Forge are trusted for their exceptional strength, corrosion resistance, and zero-leakage performance. These flanges are precision-engineered to meet stringent mechanical, dimensional, and sealing standards as per ASTM A105, ASME B16.5, and applicable DIN specifications. Manufactured using carbon steel or mild steel, our blind flanges are ideal for terminating pipe sections or isolating piping systems in high- and low-pressure applications.

With advanced forging techniques, CNC machining, and stringent inspection protocols, Fortis Forge Blind Flanges ensure optimal pressure integrity and structural stability even in the most demanding operating environments. Unlike other flanges, blind flanges do not have a bore, making them ideal for closures at the end of piping systems or equipment nozzles. Their design facilitates hydrostatic testing, maintenance shutdowns, and easy future expansion of the pipeline.

Available in a variety of pressure ratings (Class 150, 300, 600, etc.), facing types (such as Raised Face (RF), Flat Face (FF), and Ring Type Joint (RTJ)), and corrosion-resistant coatings, our Blind Flanges provide safe, durable, and cost-effective solutions across critical sectors such as oil & gas, refineries, chemical processing, power generation, and water treatment.

Whether used for temporary or permanent closures, Fortis Forge offers high-performance blind flanges engineered to match your exact specifications and operational demands.

Blind Flange, Carbon Steel Blind Flanges, Mild Steel Blind Flanges Price List, ASTM A105 Blind Flange, Forged Steel Blind Pipe Flanges, CS/MS Blind Flange Manufacturer, ASME B16.5 Blind Flange Supplier, Blind Flange Manufacturers in India

Size
½” to 48” (DN15–DN1200)
Standard
ASME B16.5 / BS 4504 / EN 1092-1
Material
Carbon Steel (ASTM A105) / Mild Steel (IS 2062)
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What is a Blind Flange?

A Blind Flange is a solid disc used to block off the end of a piping system or pressure vessel opening. Unlike other flanges, it has no bore and is commonly bolted in place to isolate a section of pipe or terminate flow in a safe, leak-proof manner.

Blind flanges are essential for:

Pressure testing of flow systems
Maintenance or system isolation
Future pipeline expansion provisions

Their ability to withstand high pressure and provide complete sealing makes them indispensable in various industrial systems.

Material Grades We Use

At Fortis Forge, our Blind Flanges are manufactured from:

Carbon Steel (ASTM A105 / ASTM A516 Gr. 70)
→ Excellent strength, toughness, and pressure resistance. Ideal for high-temperature, high-pressure environments like refineries and thermal plants.

Mild Steel (IS 2062)
→ Offers ductility, ease of fabrication, and cost-effectiveness. Suitable for low-pressure applications and general-purpose piping.

Each flange is engineered with:

Smooth and flat sealing surfaces
Precise bolt hole alignment
Corrosion and deformation resistance
Consistent thickness and diameter tolerances

Manufacturing Standards at Fortis Forge

Our Blind Flanges are produced under strict quality controls using:

Forging or plate cutting (depending on size/class)
CNC machining for dimensional precision
Heat treatment for improved mechanical properties
Non-destructive testing (NDT)
Hydro testing (if required)
Full traceability and material test certification (MTC)

All products comply with industry standards like ASME B16.5, BS 4504, IS 6392, and DIN EN 1092-1.

Applications Across Industries

Fortis Forge Blind Flanges are widely used in:

Oil & Gas Refineries
Petrochemical & Chemical Plants
Power Generation (Thermal, Nuclear, Renewable)
Marine & Offshore Structures
Pipeline Testing & Shutdowns
HVAC and Utility Piping Networks

Their sealing capability and load-bearing strength make them vital for safety-critical piping systems.

Why Choose Fortis Forge?

Certified raw materials with MTCs
Dimensional accuracy and smooth surface finish
Advanced in-house testing & quality assurance
Custom sizes and face types available
Reliable logistics with global delivery support

Blind Flanges – Class 150/300/600, Carbon Steel Blind Flange Fittings, Mild Steel Blind Flanges, ASTM A105 Blind Flanges, ASME B16.5 Flanges, High Pressure CS/MS Blind Flanges, Raised Face & Flat Face Blind Flanges Manufacturer in India

As a leading manufacturer of Blind Flanges, Fortis Forge is dedicated to producing high-quality pipe flanges that conform to stringent international standards. Our manufacturing process involves controlled forging, precision machining, and rigorous inspection to ensure each flange offers exceptional sealing performance, dimensional accuracy, and long-term durability. In India’s highly competitive market for industrial flanges, our commitment to quality, consistency, and customer satisfaction clearly sets us apart.

When selecting Blind Flanges for your piping systems, it is essential to consider the size, pressure class (150#, 300#, etc.), material grade, and specific application requirements. Unlike other flanges, blind flanges are designed to seal the end of a pipe or pressure vessel opening. They are ideal for blocking off piping sections, allowing for easy future expansion, system testing, or isolation.

Available in carbon steel and mild steel (ASTM A105, IS 2062), and compliant with ASME B16.5, BS 4504, and DIN standards, our blind flanges offer superior mechanical strength, corrosion resistance, and weldability. Whether used in oil & gas, petrochemicals, power plants, refineries, chemical processing, or water treatment, Fortis Forge delivers dependable blind flange solutions that meet your toughest service conditions.

Blind Flanges, Carbon Steel Blind Flange Fittings, Mild Steel Blind Flanges, ASME B16.5 Blind Flanges, Class 150 & Class 300 Blind Flanges, Blind Flange Manufacturers in India

Specifications ASME B16.5 / BS 4504 / EN 1092-1
Size Range ½” to 48” (DN15 to DN1200)
Types Blind Flange, Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ)
Pressure Class Class 150, 300, 600, 900, 1500
Material Grades Carbon Steel (ASTM A105), Mild Steel (IS 2062)
Standard ASTM, ASME, ANSI, DIN, EN, JIS, BS
Applications Oil & Gas, Refinery, Power Generation, Petrochemical, Shipbuilding, Water Treatment

NPS (inch)	Outside Diameter (OD) – mm
NPS (inch)	Class 150	Class 300	Class 600	Class 900	Class 1500	Class 2500
1/2	90	95	95	120	120	120
3/4	100	115	115	130	130	130
1	110	125	125	140	140	140
1½	125	145	150	165	165	165
2	150	165	170	190	190	190
2½	175	190	200	215	215	215
3	190	210	210	240	240	240
4	230	255	270	295	295	295

The Blind Flange price can vary depending on size, pressure class (150#, 300#, etc.), face type (RF, FF, RTJ), material grade, and order quantity. Typically, the price for carbon steel or mild steel blind flanges ranges from ₹60 to ₹1,200 per piece, depending on dimensions and applicable standards. As a trusted Blind Flange supplier in India, Fortis Forge offers competitive pricing while maintaining a strong focus on precision engineering and product integrity.

Quality Assurance

To preserve the high standards of our selection of Forged Fittings, Buttweld Fittings, Flanges and we have always adhered to a systematic quality management process.

Team of Experts

Our staff of experts is vibrant and talented, and they have always been our largest supporters and contributors to our success.

STANDARD	WERKSTOFF NR.	UNS	JIS	BS	GOST	AFNOR	EN
ASTM A105 (Blind)	1.0432	K03504	SF 440A	1501-151-430A	12820	NF E 29-200	P250GH / S235JR

If you would like to inquire or place an order.
+91 83330 05894

Forged Fittings, Buttweld Fittings and Flanges Manufacturer in India

Manufactured from high-strength carbon steel grades
Available in forged, buttweld, and flange configurations
Precision-machined for leak-proof, high-pressure applications
Heat-treated and normalized to ensure durability and strength
Tested for dimensional accuracy and pressure resistance
Corrosion-resistant coatings available on request