Blind Flange

The Blind Flange Manufacturer!

Dingxiang Yixinyuan Flange Processing Co.,Ltd. is the manufacturing that a profession is engaged in free forging, mold forging, vorious molding tool steel, various machine accesories and large forging piece etc. management business enterprise.

Why choose us

One-Stop Service

My company has buy, examine, saw to slice, forge from the material, hot processing, the machine process packing hair luck the integral whole turn of production system.

Product Application

Petrochemical industry, energy industry, water treatment industry, environmental protection engineering, construction engineering, shipbuilding industry, valves, water pumps, power plants, steel mills: valves, water pumps, power plants, steel mills.

Quality Control

Company strictly according to ISO9000 standard organize produce and manage, build up valid circulate stable dependable quality management and guarantee system, strict material production equipments and quality of the control, consummate processing technology experience and forerunner examination experiment.

Size	1/2″ to 48″ (As Per Requirement)
Material Standard	Stainless steel / Cast iron / Aluminium / Brass / Bronze / Plastic / M.S
Pressure Rating & Class	150 / 300 / 400 / 600 / 900 / 1500 / 2500
Color	Silver / Black / Red / Pink / Blue / Purple / Gold / Orange / Grey
Finishing	Raised face / Flat face
Usage/Application	Piping / Valves / Pumps / Process Plant
Thikness	5mm to 50mm
Connection	Welded / Screwed

Advantages 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.

Types of Blind Flange

Double Spectacle Blinds: These are utilized in pipelines and vessel systems of high-pressure ratings. One piece is affixed to both sides of the flange. However, their design can be adapted to accommodate different sizes and materials.

Weld Overlay Spectacle Blinds: These offer a superior seal at higher temperatures and pressures. Thanks to the weld-cladding technique that fuses the two components instead of relying on nuts and bolts.

Bull Plugs: These gadgets are found to be ideal for easy and secure flow shut-off in gas lines and other piping systems. Unlike the need for wrenches or clamps, the one-handed operation of the Bull Plug offers prompt disconnection and reconnection.

Cone & Threaded Flange Drains: In certain cases, it might be necessary to remove certain elements for which cone and threaded flange drains can be used. When these components are detached,it is simple to reattach them, as if no work had ever been done in the region, making it easier to reconnect if service is needed soon after completion.

Orifice Plate Spectacle Blinds offer superior longevity and strength for transmitting chemicals under high temperatures and pressures. This type of blind is secured between two spectacle frames held by hub bolts for a secure joint connection during operation, as opposed to conventional sight methods.

Lugged Spectacle Blinds: ASME 150LB class flanges with semi-lugged/grooved surface structures require more in-depth engineering and design.

Blankers/Spades: Blankers with a figure eight design, composed of two flanges facing one another, provide outstanding performance due to their reliable, positive pull-out design.

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.

Choose of Blind Flange

Material:

Select a material that is compatible with the fluids being transported, such as stainless steel, carbon steel, or PVC.

Size:

Ensure the blind flange matches the diameter of the pipe it will seal.

Pressure Rating:

Choose a flange that can withstand the pressure requirements of your system.

Marking & Packing

Products are packaged to ensure that there is no damage during transit. In case of exports, standard export packaging is done in wooden cases. All flanges are marked with Grade, Lot No, Size, Degree and our trade mark. On special requests we can also, make custom marking on our products.

FAQ

Q: Why is blind flange used?

A: Blind flanges may be used when testing pipe pressure, to create an access point in a piping system, to temporarily seal a piping system while modifying or repairing the line, or to create a long-term seal to terminate a piping system. A blind flange is bolted, rather than welded in place.

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.

Q: What are the different types of blind flanges?

A: Blind flanges are available in various types, including slip-on flanges, threaded flanges, weld neck flanges, and socket weld flanges. These types allow for flexibility in choosing the best blind flange depending on the specific requirements of the pipeline system, such as pipe size, pressure, or installation method.

Q: How to measure blind flange size?

A: Place your measuring tool across the widest part of the blind flange, making sure to measure from edge to edge. Take multiple measurements at different points around the flange to ensure consistency. This step is crucial because even small variations in the outside diameter can affect how well the blind flange fits.

Q: How do you install blind flanges?

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: Does a blind flange need a gasket?

A: Yes, gaskets are typically placed between the flange and pipe surface to ensure a secure, leak-free seal. The bolts are then tightened evenly around the flange to maintain consistent pressure and prevent leaks.

We're professional blind flange manufacturers and suppliers in China, specialized in providing high quality customized products. We warmly welcome you to wholesale bulk blind flange for sale here from our factory.

Stainless Steel Forged Blind Flange, Ansi Blind Flange, Carbon Steel Tapped Blind Flange

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