High-Integrity Blind Flanges for Secure System Closure & Pressure Testing
Vardhman Steel Overseas offers a wide range of precision-crafted Blind Flanges (BL Flanges), engineered for isolating sections of piping systems, terminating pipe runs, and enabling safe access for maintenance, testing, or future expansion. These solid disk flanges are designed without a bore and are bolted to a matching flange, creating a robust seal under high pressure and temperature conditions.
Blind Flanges are commonly used in Oil & Gas Processing Units, Petrochemical Plants, Water Treatment Systems, Power Generation Stations, Food & Beverage Facilities, and Pharmaceutical Pipelines. They are particularly effective for pressure vessel closures, nozzle sealing, and hydrostatic testing of pipe systems.
Manufactured to conform with global standards such as ASME B16.5, ASME B16.47 Series A/B, EN 1092-1, DIN, ANSI, and BS, our Blind Flanges are available in pressure ratings ranging from Class 150 to Class 2500, and sizes from ½” NB to 48” NB. Face types include Raised Face (RF), Flat Face (FF), and Ring Type Joint (RTJ).
All Blind Flanges undergo stringent inspection procedures for dimensional accuracy, surface flatness, and pressure containment. We supply flanges with Mill Test Certificates (MTCs) and offer optional Third-Party Inspection from globally recognized bodies such as TUV, Lloyds, BV, and DNV.
Trust Vardhman Steel Overseas for superior-quality Blind Flanges that ensure leak-proof system shutdown, safe operation, and long-term performance under the most demanding service conditions.
Available Materials & Grades
Our Blind Flanges are available in a broad spectrum of materials and grades to meet the demands of high-pressure systems and corrosive environments across multiple industries.
| Material Type | Common Grades |
|---|---|
| Stainless Steel | 304, 304L, 316, 316L, 310S, 321, 347, 904L |
| Carbon Steel | A105, A350 LF2, A516 Gr.60/70 |
| Alloy Steel | A182 F1, F5, F9, F11, F22, F91 |
| Duplex Steel | UNS S31803, UNS S32205 |
| Super Duplex Steel | UNS S32750, UNS S32760 |
| Inconel | 600, 601, 625, 718 |
| Incoloy | 800, 800H, 800HT, 825 |
| Monel | 400, K500 |
| Hastelloy | C22, C276, B2 |
| Titanium | Grade 2, Grade 5 (Ti-6Al-4V) |
| Nickel Alloy | Nickel 200, Nickel 201 |
| Copper Alloys | Copper, Brass, Bronze, Cupro Nickel 90/10 & 70/30 |
Blind Flange – Technical Specifications
Explore the comprehensive specifications of our high-integrity Blind Flanges supplied by Vardhman Steel Overseas, suitable for safe system isolation and pressure testing.
| Specification Parameter | Details |
|---|---|
| Product Name | Blind Flange (BL Flange) |
| Size Range | ½” NB to 48” NB |
| Pressure Ratings | Class 150, 300, 600, 900, 1500, 2500 |
| Facing Types | Raised Face (RF), Ring Type Joint (RTJ), Flat Face (FF) |
| End Connection | Bolted |
| Manufacturing Method | Forged / Machined |
| Applicable Standards | ASME B16.5, ASME B16.47 Series A & B, EN 1092-1, DIN, ANSI, BS |
| Testing & Certification | Hydro Testing, PMI, UT, RT, MTC as per EN 10204 3.1 / 3.2, Third-Party Inspection (TPI) |
Features & Benefits
Blind Flanges by Vardhman Steel Overseas are engineered for system termination, safe shutdown, and hydrostatic testing. They are a vital part of pressure vessel operations and maintenance.
- Leak-Proof Closure – Ideal for securely sealing the end of pipes, valves, or pressure vessel openings.
- High Pressure Tolerance – Designed to withstand extreme pressure and temperature conditions in critical systems.
- Perfect for Isolation – Enables system isolation for testing, maintenance, or future line extensions.
- Robust & Solid Design – Manufactured from solid forgings to provide structural integrity and safety.
- Hydrostatic Testing Friendly – Frequently used in hydro tests to evaluate the integrity of pressure lines.
- Versatile Facing Options – Available with RF, FF, and RTJ faces for compatibility with standard piping setups.
- Conforms to Global Standards – Produced in accordance with ASME, EN, DIN, BS, and ANSI specifications.
- Material Flexibility – Offered in stainless steel, carbon steel, alloy steel, and corrosion-resistant metals.
- Accurate Machining – Ensures precise alignment and tight bolt fitting for reliable system closure.
- Wide Industry Usage – Commonly used in oil & gas, water treatment, power generation, and chemical industries.