Blank Flange vs Blind Flange

Table of Contents

Flanges are basic components in channeling frameworks, serving different purposes such as interfacing channels, valves, pumps, and other gear. Among the various sorts of Flanges accessible, Blank Flanges and blind flanges are regularly said and now and then befuddled.

What are Blank Flanges?

Blank flanges are commonly utilized in channeling frameworks to seal off the closes of channels, valves, or hardware. They are straightforward plates without any center bore, successfully halting the stream of liquids or gasses. Blank  flanges are ordinarily made from different materials, counting carbon steel, stainless steel, and combinations, to suit distinctive natural and operational requirements.

Applications of Blank Flanges

Blank flanges are essentially utilized when it is vital to near off a segment of a channeling framework briefly or for all time. They are regularly utilized in upkeep and repair operations where a pipe segment needs to be disconnected. Moreover, Blank  Flanges are valuable in framework alterations or expansions, permitting for the secure expansion of unused components without hindering the whole system.

Temporary Closure: In situations where a component needs to be temporarily removed from a system, blank flanges can be used to seal off the open ends until the component is reinstalled. This prevents the escape of fluids or gases and maintains the integrity of the system.

Flange Protection: During transportation or storage, blank flanges can be used to protect the flange faces of piping components from damage or contamination. By covering the flange faces with blank flanges, the integrity of the sealing surfaces is preserved, ensuring proper connection when the components are installed.

Overall, blank flanges play crucial roles in a variety of industrial applications, providing sealing, isolation, and protection functions essential for the safe and efficient operation of piping systems, valves, and pressure vessels.

What are Blind Flanges?

Blind Flanges, like Blank Flanges, are planned to near off the closes of channeling frameworks. In any case, they are more vigorous and are particularly utilized to square the conclusion of a pipe for all time. they are disc-shaped and include jolt gaps around the border, making them congruous with different channeling frameworks and weight ratings.


Blind flanges are broadly utilized in high-pressure applications where the pipe conclusion must be safely fixed. They are moreover utilized in frameworks that may require future extensions or support. By introducing a dazzle spine, administrators can guarantee that the pipe conclusion is securely fixed whereas holding the alternative to revive it for future modifications.


The establishment handle for blind flanges includes shooting them to the pipe conclusion utilizing the flange’s jolt gaps. The spine confront ought to be appropriately adjusted and fixed to accomplish a leak-proof seal. they can too be welded in put for extra security, particularly in high-pressure applications. Legitimate establishment and upkeep are fundamental to avoid spills and guarantee the secure operation of the channeling framework.

Types of Blind Flanges

Blind flanges come in various designs to suit different applications, including:

– Flat Face (FF): Used in low-pressure systems.

– Raised Face (RF): Suitable for high-pressure applications, providing an enhanced seal.

– Ring Type Joint (RTJ):Ideal for high-pressure and high-temperature environments, offering excellent sealing properties.

Characteristics of Blind Flanges

Blind flanges possess unique characteristics that make them suitable for specific applications. Understanding these characteristics is crucial for selecting the right flange for your needs.

High Strength

Blind flanges are designed to withstand high-pressure environments, offering superior strength and durability. The robust construction ensures that they can handle the stresses and strains associated with high-pressure systems, providing a secure and reliable seal.


Blind flanges are versatile components that can be used in various industries, including oil and gas, petrochemical, water treatment, and power generation. Their ability to securely seal the end of a pipe makes them indispensable in systems that require periodic maintenance or future expansions.

Easy Installation and Removal

One of the key advantages is their ease of installation and removal. They can be quickly bolted or welded into place, providing a secure seal. When maintenance or system modifications are necessary, they can be easily removed and reinstalled, minimizing downtime and ensuring operational efficiency.

Corrosion Resistance

Blind flanges are available in various materials, including stainless steel, carbon steel, and alloys. This allows for the selection of flanges with excellent corrosion resistance, suitable for different environmental conditions and fluid types. Choosing the right material ensures the longevity and reliability of the flange in corrosive environments.

Key Differences Between Blank and Blind Flanges

While blank flanges and blind flanges may seem similar, they have distinct differences that make them suitable for different applications. Understanding these differences is essential for selecting the appropriate flange for your piping system.

Design and Construction

The primary difference between blank flanges and blind flanges lies in their design and construction. Blank flanges are simple plates without a center bore, while blind flanges are disc-shaped with bolt holes around the perimeter. This difference in design affects their installation and applications.


Blank flanges are typically used for temporary or permanent closure of a piping system section during maintenance or modifications. In contrast, blind flanges are used to permanently block the end of a pipe, especially in high-pressure applications. The choice between the two depends on the specific requirements of the piping system and the intended use.

Pressure Ratings

Blind flanges are designed to handle higher pressure ratings compared to blank flanges. Their robust construction makes them suitable for high-pressure applications, providing a secure and reliable seal. Blank flanges, while still durable, are more commonly used in low-pressure systems.

Flange Manufacturer

Hebei Pengrun Pipe Fittings Co., Ltd is a reputable manufacturer with over 20 years of experience in producing high-quality pipe fittings and flanges. Their expertise in the industry and commitment to quality make them a reliable partner for your piping system needs.

If you are in the process of selecting your pipe fittings and flanges supplier, please do not hesitate to reach out to Hebei Pengrun Pipe Fittings Co., Ltd at


1. ASM International. (n.d.). Forging of Stainless Steels.

2. American Society of Mechanical Engineers (ASME). (n.d.). ASME B16.5 Standard.

3. Engineering Toolbox. (n.d.). Stainless Steel Grades.

4. Metal Forming Handbook. (n.d.). Forging Processes.

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Lucy yang

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