Blind Flange

Your Professional Blind Flange Supplier

Established in 2009 as a national high-tech enterprise with 15 years of expertise in R&D, production, and sales of stainless steel pipe fittings and pipeline accessories.

Our popular product offerings primarily include butt welding pipe fittings, forged pipe fittings, stainless steel flanges, stainless steel pipes, and related components.

Blind Flange Thickness Calculation ASME B16.5
ASME: ASME B16.5/16.47 | MSS SP44
EU: DIN 2527-2642 | EN 1092-1
JIS/GOST: JIS B2220 | GOST 12820
Custom Engineering: Non-standard designs per DRAWINGS
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Why Choose us

Advanced Production Equipment

We utilize specialized equipment for precision cutting, forming, welding, heat treatment, and surface finishing. Examples include heat treatment furnaces, large hydraulic press machines for manufacturing tees and reducers, laser cutting machines for pipes, high-power fiber laser cutting machines for plates, and elbow cold forming machines, among others.

Quality Control

Our quality and safety management systems are certified under ISO 9001:2015, API Q1, ISO 45001 (OHSMS), and ISO 14001 (Environmental Management System), ensuring compliance with international standards.

Specialized Workshops

We maintain a fully equipped physical and chemical laboratory, along with a dedicated inspection workshop, to support comprehensive quality assurance and control processes.

Parameter

ASME:	ASME B16.5/16.47 \| MSS SP44
EU:	DIN 2527-2642 \| EN 1092-1
JIS/GOST:	JIS B2220 \| GOST 12820
Custom Engineering:	Non-standard designs per DRAWINGS

Benefits of Blind Flange

Cost-efficiency — Their simple designs make them easy to manufacture, and their easy installation saves time.

Durability:

They are durable and long-lasting due to their robust materials and lack of moving parts.

Versatility:

Compatible with many different types of flanges, they can be deployed in a wide range of piping systems.

Safety:

These help keep workers safe by preventing leaks during maintenance or repair work.

Blind Flange Materials and Construction

A blind flange is typically manufactured from various materials, including carbon steel, stainless steel, alloy steel, and non-ferrous metals such as copper, brass, or bronze. The choice of material depends on factors such as the fluid or gas being transported, operating conditions, and environmental factors. For example, stainless steel blind flanges are preferred for corrosive environments, while a carbon steel blind flange can offer excellent strength and durability in high-pressure applications.

Applications of Blind Flanges

Pressure Testing:

Blind flanges seal off pipeline sections during pressure testing, ensuring safety and accuracy.

Isolation:

They are employed to isolate sections of a pipeline for maintenance or repairs, preventing the escape of hazardous substances.

Temporary Closure:

When a pipeline is temporarily not in use, blind flanges can seal it off securely.

End Cap:

Blind flanges are often used as end caps in vessels and tanks to maintain pressure or remove contaminants.

Instrumentation and Inspection Ports:

They can serve as access points for inspection or the installation of measurement instruments like pressure gauges and thermometers.

Precautions For Storing Blind Flanges

Environmental Considerations

The environment where you store your blind flanges can greatly influence their durability and readiness for use. Key environmental factors include:

Humidity and Moisture:

Excessive humidity can lead to corrosion and rust, significantly shortening the lifespan of your flanges. It’s crucial to store them in a dry area or use dehumidifiers in storage rooms.

Temperature:

Extreme temperatures, either high or low, can affect the material properties of blind flanges. Maintaining a moderate and stable temperature is ideal to prevent any material degradation.

Ventilation:

Proper ventilation in the storage area helps in minimizing moisture buildup and maintaining an even temperature.

Ensuring these environmental factors are in check can significantly reduce the risk of damage due to corrosion or mechanical failure.

Packaging Considerations

How you package your blind flanges for storage also plays a pivotal role in their preservation. Some points to note:

Corrosion-Inhibiting Packaging:

Using packaging materials that prevent corrosion, such as VCI (Volatile Corrosion Inhibitors) bags, can offer an additional layer of protection against moisture and air that could lead to rust.

Padding and Separation:

To prevent mechanical damage, it’s advisable to use padding materials between flanges and ensure they’re not stacked too tightly. This method reduces the risk of scratches or deformations.

Sealed Packaging:

In highly corrosive environments, sealing your blind flanges in airtight packaging can prevent exposure to harmful elements.

Additional Information

Shipping	We provide multiple trustworthy shipping options such as UPS, DHL, TNT, EMS, and FedEx Express.
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FAQ

Q: Are blind flanges reusable?

A: Blind Flanges can often be reused, but it depends on the specific application and condition of the flange. Inspection and maintenance are important to ensure their continued effectiveness.

Q: How does a blind flange work?

A: A blind flange (also called a 'closure plate flange') is installed at the end of a piping system to terminate a pipe. It has no centre hole (bore), so there is no flow through the flange. A blind flange may be used for isolating a pipe, valve, or pressure vessel.

Q: Does a blind flange need a gasket?

A: Installing a blind flange is relatively straightforward. It is bolted onto the pipe's open end using the holes around its circumference. A gasket is often placed between the flange and the pipe to ensure a tight and leak-free seal. Tightening the bolts evenly provides a secure connection.

Q: How to use a blind flange?

A: In most cases, the blind flange is attached between two pipe flanges or to the end of the pipe being sealed. The bolt holes around its outer edge are used to secure it to the end of the pipe. Many times, a spiral gasket is installed between the face of the blind flange and the pipe to prevent leaks.

As one of the leading blind flange manufacturers and suppliers in China, we warmly welcome you to buy high quality blind flange made in China here from our factory. Good service and punctual delivery are available.

ASME B16 9 Blind Flange, blind flange