A Blind Flange is an essential pipe component used to seal or close the end of a piping system, valve, or pressure vessel.
It ensures a secure and leak-proof closure, preventing fluid or gas flow beyond a specific point.
In Saudi Arabia, the Blind Flange is widely used in oil and gas, petrochemical, marine, power generation, and water treatment industries — particularly in Riyadh, Dammam, Jeddah, and Jubail — where system safety and integrity are paramount.
A Blind Flange, sometimes called a blank flange or pipe blind, a solid plate used to block the end of a pipe.
Unlike other flange types, it has no bore (opening) and bolted between two flanges or against a pressure vessel nozzle.
This makes it perfect for isolating sections of a pipeline, performing maintenance, or pressure-testing system integrity.
When needed, it can easily be unbolted and removed to restore flow.
Industrial environments in Saudi Arabia demand components that provide strength, precision, and reliability.
A Blind Flange offers all these benefits, ensuring long service life even in extreme pressure or temperature conditions.
Complete Sealing: Provides a 100% closure for piping systems.
Pressure Tested: Designed to withstand high pressure and temperature ratings.
Versatile Use: Ideal for pipeline isolation, testing, or inspection.
Durable Construction: Manufactured from high-strength materials for extended service life.
Ease of Maintenance: Can easily installed and removed when required.
Multiple Material Options: Available in carbon steel, stainless steel, duplex, and alloy steel.
Compatibility: Suited for ASME, ANSI, DIN, and API standard systems.
Face Options: Available in Raised Face (RF), Flat Face (FF), and Ring Type Joint (RTJ) designs.
The Blind Flange serves a critical function in both temporary and permanent pipeline isolation.
It ensures operational safety and efficiency across numerous industrial sectors.
Oil and Gas Pipelines – For sealing unused pipe ends during pressure testing or maintenance.
Petrochemical Plants – To isolate chemical processing lines.
Power Generation Systems – Used for boiler and steam line closure.
Marine and Offshore Applications – Reliable in high-salinity and corrosive environments.
Water and Wastewater Treatment Plants – Ensures leak-proof shutdown and cleaning operations.
Process Piping Systems – Facilitates safe shutdowns and repairs.
ASME B16.5 – Pipe Flanges and Flanged Fittings
ASME B16.47 – Large Diameter Flanges
API 6A – Specification for Wellhead Equipment
ISO 7005 – Metallic Flanges
NACE MR0175 / ISO 15156 – Sour Service Materials
These standards ensure every Blind Flange in Saudi meets the highest international safety and performance requirements.
1. What is the purpose of a blind flange?
It’s used to close or isolate the end of a pipeline, ensuring no flow or leakage occurs.
2. What materials are available?
Common materials include carbon steel, stainless steel, duplex, and alloy steel.
3. Can it handle high pressure?
Yes, depending on the class, it can handle up to Class 2500 pressure ratings.
4. How does it differ from a slip blind?
A blind flange, bolted, while a slip blind inserted between flanges for quick isolation.
5. Are gaskets required?
Yes, a gasket used between the blind flange and its mating surface to prevent leakage.
6. Can it be reused?
Yes, blind flanges can removed and reused during system modifications or testing.
7. Where can I buy blind flanges in Saudi Arabia?
From Nassguard, a trusted supplier serving Riyadh, Dammam, Jubail, and Jeddah.
The Blind Flange is an indispensable component for achieving leak-proof closures in industrial piping systems.
It provides unmatched safety, pressure resistance, and ease of maintenance, making it one of the most versatile flanges available in Saudi Arabia.
For ASME-certified, corrosion-resistant Blind Flanges in Saudi, rely on Nassguard, the trusted name in industrial supply.
| Specification | Details |
|---|---|
| Product Name | Blind Flange |
| Design Type | Solid, No Bore (Pipe Closure) |
| Material Grades | Carbon Steel (A105), Stainless Steel (304 / 316), Alloy Steel (F11 / F22), Duplex (F51 / F53) |
| Pressure Ratings | Class 150, 300, 600, 900, 1500, 2500 |
| Sizes | ½″ to 48″ (Custom sizes on request) |
| Face Type | RF, FF, RTJ |
| Standards | ASME B16.5 / ASME B16.47 / MSS SP-44 / API 6A |
| Testing | Hydrostatic, Ultrasonic (UT), Radiography, PMI |
| Finish | Polished, Galvanized, or Anti-Rust Coated |
| Supplier | Nassguard – Saudi Arabia |