China Blind Flange Manufacturers Suppliers Factory - Blind Flange Made in China

Tianjin Baode Steel Co., Ltd.

We mainly produce seamless steel pipes, ERW steel pipes, LSAW steel pipes, SSAW steel pipes, as well as stainless steel, alloy steel elbows, tees, reducers, flanges, and other pipe fittings.

BLIND FLANGE 3" 300# RF SERRATED SPIRAL FINISH A105N ASME...
BLIND FLANGE 3" 300# RF SERRATED SPIRAL FINISH A105N ASME B16.5 Products: Blind Flange Size: 1/2"-24" Pressure: 150#,300#,600#,900#,1500#,2500# etc Standard: ANSI B16.5 Steel Grade: A105N Finished: Serrated Spiral Finish
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ASME B16.48 Steel Line Figure 8 Blanks Spectacle Blind
ASME B16.48 Steel Line figure 8 Blanks Spectacle Blind
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2 INCH 150# RF BLIND FLANGE
2 INCH 150# RF BLIND FLANGE Size: 2 inch our produce scope:1/2" (15 NB) to 48" (1200NB) Class: 150#(150LBS) our produce scope:150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS, DIN Standard ND-6,10, 16, 25, 40 Etc. Flange
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Flange Blind Plates
Blind Flanges mainly include: Blind Flanges, plate Blind Flanges, butt welded Blind Flanges, threaded Blind Flanges, and socket welded Blind Flanges. Blind Flanges: This is the most direct and universal keyword used to refer to all types
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RF Blind Flanges
The standard for RF Blind Flanges covers multiple aspects, including standards from the Ministry of Machinery, national standards, standards from the Ministry of Chemical Industry, and marine standards. Specifically, as follows:.
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Why Choose Us

Our Certifications:

Our products are certified with ISO 9001, ISO 14001, and ISO 45001 standards. We are also recognized as an AAA Credit Enterprise.

Production Market:

Our pipe fittings are exported to over 40 countries and regions, including North America, South America, Southeast Asia, the Middle East, and Africa. Our products have received unanimous praise from both domestic and international customers.

Our Services:

We provide detailed product explanations, answer inquiries, offer solutions, and give product quotations. We keep customers updated on production progress, offer multiple payment methods, and arrange logistics and delivery. Additionally, we provide shipping schedule updates, pre-arrival reminders, and follow-up customer tracking services.

Blind Flange

Blind flanges are unique components in the piping system. They look simple but play an essential role in closing the end of the pipe or vessels. It looks like a solid, flat disc bolted at the pipe’s end, typically with a defined facing for sealing.

Technical Specifications for Blind Flanges

Technical Parameter	Specifications
Size Range	1/2″ to 60″ (15mm to 1500mm)
Pressure Class	ANSI Class 150 to Class 2500
Temperature Range	-196°C to 650°C
Material Options	Carbon Steel, Stainless Steel, Alloy Steel, Duplex Steel
Standards	ASME/ASNI B16.5, ASME/ASNI B16.47, EN 1092-1, BS 4504
Surface Finish	125-200 AARH32-125 AARH
Bolt Hole Pattern	ASME B16.5 standardized
Testing Methods	Hydrostatic TestingRadiographic TestingUltrasonic TestingPMI Testing
Hardness	Max 200 HB

Blind flanges offer the following advantages:

Uniform Stress Distribution: They distribute stress evenly across the flange face.

Compatibility: They are compatible with different flange types, making them versatile in various systems.

Enhanced Safety: They reduce the risk of accidents and environmental damage by providing a reliable closure.

Leak Prevention: Blind flanges create a secure seal, preventing leaks in the pipeline.

Maintenance Convenience: They make it easy to isolate sections for maintenance without disrupting the entire system.

Versatility: Blind flanges are suitable for various pipe materials and sizes.

Pressure Relief: Blind flanges can be used for pressure relief when necessary, typically when ports are created in their body.

Easy Installation: It is simple to install and remove as needed.

Safety: They ensure safety during pressure testing and maintenance by blocking off hazardous substances.

Longevity: Blind flanges are durable and corrosion-resistant, extending their lifespan.

Cost-Efficiency: They are cost-effective solutions for sealing pipe ends and reducing downtime.

Adaptability: Blind flanges are suitable for high-temperature and high-pressure environments.

Customization: They come in various materials, including stainless steel, carbon steel, and more, to suit specific applications.

Reduced Maintenance Costs: They minimize the need for frequent maintenance and repairs.

No Flow Restriction: Since they have no bore, blind flanges do not obstruct flow when not in use.

Key Features of Blind Flanges:

Purpose:

Blind flanges are used to close off the ends of pipes, valves, or other equipment, providing a secure seal.

Design:

They are typically flat and have no central opening, which distinguishes them from other types of flanges that allow for flow.

Material:

Blind flanges can be made from various materials, including carbon steel, stainless steel, and alloy materials, depending on the application and environmental conditions.

Applications:

Commonly used in oil and gas, chemical processing, water treatment, and other industrial applications where a secure closure is needed.

Installation:

Blind flanges are bolted to the piping system, and gaskets are often used to ensure a tight seal and prevent leaks.

Applications of Blind Flanges

Blind flanges have several applications in a variety of sectors. Some common applications include:

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.

Material Types and Standards

Blind Flange material usually required in carbon steel, stainless steel, alloy steel, copper, aluminum and etc.

Carbon steel blind flange: ASTM A105
Alloy steel: ASTM A182 F5, F9, F11, F22, F91
Stainless steel blind flange: ASTM A182 F304/L, F316/L

Dimensions

General use OD range: 1/2'', 2'', 3'', 4'', 6'', 8'', 10'', 12'', to 24”.
Special made OD: Up to 60”.
Class range: Class 150, Class 300, 400, 600, 900, 1500, 2500
Flange face type: RF (Raised Face), RTJ (Ring Type Joint)

Applications of a Blind Flange:

Blind flanges find widespread use across numerous industries, including:

Oil and Gas: Blind flanges are used in oil refineries, petrochemical plants, and offshore platforms for system isolation, pressure testing, and equipment maintenance.

Chemical Processing: In chemical processing facilities, blind flanges seal off pipelines during batch processing, cleaning, or equipment inspections.

Water Treatment: In municipal water treatment plants and industrial facilities, blind flanges are employed in piping systems to control flow and isolate sections for repairs or upgrades.

Power Generation: In power plants, blind flanges are utilized in steam, water, and gas pipelines to temporarily or permanently close them during maintenance shutdowns or equipment replacement.

HVAC Systems: In heating, ventilation, and air conditioning (HVAC) systems, blind flanges seal off ductwork or piping branches to control airflow and pressure distribution.

Examples of Blind Flange Application:

Offshore Drilling Rig:

During routine maintenance on an offshore drilling rig, blind flanges seal off sections of the piping system, allowing technicians to work safely without the risk of fluid leakage.

Chemical Plant Shutdown:

When a plant is shut down for equipment inspection and maintenance, blind flanges isolate specific process units, ensuring personnel safety and preventing product contamination.

Water Pipeline Repair:

In a municipal water treatment facility, blind flanges block off pipeline sections undergoing repair or replacement, minimizing service disruptions for consumers.

Packaging &Transportation

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Certifications

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FAQ

Q: How is your price?

A: Although we have brand-name products, our prices are very favorable and competitive.Because of our best price, customers from all over the world come to purchase our products.

Q: How long is your warranty?

A: Our Warranty is 12 month.

Q: Can I get free samples?

A: Yes, we can provide you the free samples, but you need to bear their own delivery costs.

Q: Can I request to change the form of packaging and transportation?

A: Yes, We can change the form of the packaging and transportation according to your request, but you have to bear their own costs incurred during this period and the spreads.

Q: Can I request to advance the shipment?

A: It should be depends on whether there is sufficient inventory in our warehouse.

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 and get pricelist from our factory. For price consultation, contact us.

blind flange