Plate Flange

What is Plate Flange

A Plate Flange is a flat circular flange with a central hole and bolt holes around the body. It is designed to connect pipes, valves, pumps, and other pipeline equipment through welding and bolting.

Compared with weld neck flanges, plate flanges have a simpler structure and lower manufacturing cost. The pipe is usually inserted through the bore of the flange and welded in place, creating a stable and practical connection for general piping systems.

Plate flanges are especially suitable for low-pressure and medium-pressure systems where easy installation, economical cost, and reliable sealing performance are required.

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Plate Flange Specifications

Additional Specifications:

Face Types: Raised Face (RF), Flat Face (FF), MFM, TG, Ring Type Joint (RJ)

Connection Method: Welding and bolted connection

Surface Finish: 125-250 μin Ra for sealing surfaces

Dimensional Tolerance: According to standard or customer drawing

Custom Service: Non-standard size, special drilling, special thickness available

Plate Flange Materials & Grades

Plate flanges are available in a wide range of materials. The material should be selected according to pipeline medium, working pressure, temperature, corrosion environment, and project standard.

Carbon steel plate flanges are widely used in water supply, drainage, HVAC, construction, and general industrial systems. Stainless steel plate flanges are suitable for chemical, food, pharmaceutical, and corrosive environments. Alloy steel and duplex materials can be used for higher temperature, higher pressure, or special working conditions.

Plate Flange Dimensions

Plate Flange Dimension Drawing with OD ID BCD Bolt Hole and Thickness

Standardized plate flanges can be manufactured according to standard dimensions or customer drawings. Key dimensions include outside diameter, inside diameter, flange thickness, bolt circle diameter, bolt hole diameter, number of bolt holes, and sealing face type.

Advantages of Plate Flange

Cost-Effective Connection

Plate flanges have a simple structure and lower production cost, making them suitable for large-volume pipeline projects.

Easy Installation

The pipe can be inserted through the flange bore and welded in position. This installation method is simple and efficient.

Flexible Standard Options

Plate flanges can be supplied according to EN, DIN, BS, JIS, ANSI, GOST, and customer drawings.

Wide Material Selection

Carbon steel, stainless steel, alloy steel, duplex steel, nickel alloy, and other special materials are available.

Good Sealing Performance

With accurate machining and suitable sealing face treatment, plate flanges provide stable sealing for low-pressure and medium-pressure pipeline systems.

Reduced Maintenance Cost

The simple structure makes inspection, replacement, and maintenance easier during long-term pipeline operation.

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Applications

Water Supply and Drainage

Plate flanges are widely used in municipal water pipelines, drainage systems, pump stations, and water treatment projects.

HVAC Systems

They are commonly used in heating, ventilation, air conditioning, and cooling water pipeline systems.

Fire Protection Systems

Plate flanges provide economical and reliable connections for fire water pipelines and sprinkler systems.

Chemical Processing

Stainless steel and alloy plate flanges are suitable for chemical pipelines carrying corrosive or special media.

Construction Projects

Plate flanges are used in building pipeline systems, infrastructure projects, and general mechanical installations.

General Industrial Pipelines

They are suitable for equipment connection, pipe joining, and pipeline maintenance in factories and industrial plants.

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Why Choose Us

Comprehensive Fabricating Capabilities

We coordinate cutting, forging, machining, drilling, heat treatment, testing, and packaging under one production system. You get stable quality control throughout the whole manufacturing process.

International Standards Compliance

Our products meet EN, DIN, BS, JIS, ANSI, GOST, and customer drawing requirements. You can specify exact flange dimensions, material grades, pressure ratings, and surface treatments.

Extensive Size Range

From DN10 to DN4000, we cover most industrial pipeline requirements. Customized outside diameter, bore size, thickness, and drilling patterns are available.

Quality Affirmation

Advanced inspection equipment ensures each product meets dimensional and material requirements. Material certificates and traceability documents can be provided.

Global Trade Experience

Our flanges serve markets in Europe, the Americas, Southeast Asia, the Middle East, and other regions. Export packaging and shipping support are available.

Competitive Advantages

Stable quality, competitive pricing, secure packaging, and quick delivery help support your project schedule and purchasing budget.

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FAQ

Q: What is a Plate Flange?

A: A plate flange is a flat circular flange with a center bore and bolt holes. It is used to connect pipes, valves, pumps, and other pipeline equipment.

Q: What standards are available for plate flanges?

A: Plate flanges can be supplied according to EN 1092-1, DIN, BS, JIS, ANSI, GOST, and custom drawings.

Q: What materials can be used for plate flanges?

A: Common materials include carbon steel, stainless steel, alloy steel, duplex steel, nickel alloy, copper alloy, and titanium.

Q: Is Plate Flange suitable for high-pressure applications?

A: Plate flanges are mainly used for low-pressure and medium-pressure systems. For high-pressure or severe service conditions, weld neck flanges are usually recommended.

Q: Can you produce customized plate flanges?

A: Yes. Customized size, thickness, bore, drilling pattern, sealing face, material, and surface treatment can be produced according to customer drawings.

Contact Us

Ready to enhance your piping systems with premium Plate Flange solutions? Contact us for technical specifications, customized drawings, and competitive quotations today.

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