Shanxi HongKai Forging Co., Ltd. specializes in manufacturing premium Plate Flange products" target="_blank">products with integrated production capabilities spanning forging, heat treatment, machining, and comprehensive quality testing. Our enterprise-level solutions feature specifications ranging from DN15 to DN4000, pressure ratings up to Class 2500, and compliance with multiple international standards including ASME B16.5, EN1092-1, and DIN. With three department workplaces and free import-export rights, we provide prevalent channeling association arrangements for requesting mechanical applications worldwide.
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.

| Standard | Type | Class / Pressure Rating | Size Range | Material Options |
|---|---|---|---|---|
| EN 1092-1 | Type 01 Plate Flange for Welding | PN2.5-PN40 | DN10-DN4000 | P250GH, S235JR, Stainless Steel |
| DIN 2576 | Plate Flange | PN10 / PN16 | DN10-DN2000 | Carbon Steel, Stainless Steel |
| DIN 2501 | Plate Flange / Welding Flange | PN6-PN40 | DN10-DN2000 | Carbon Steel, Alloy Steel |
| BS 4504 | Plate Flange for Welding | PN6-PN40 | DN10-DN1500 | Carbon Steel, Stainless Steel |
| JIS B2220 | Steel Pipe Plate Flange | 5K, 10K, 16K, 20K | DN10-DN1500 | SS400, SUS304, SUS316 |
| ANSI / ASME Custom | Customized Plate Flange | Class 150 / Custom | Customized Sizes | ASTM A105, A182, A350 |
| GOST | Plate Flange | Custom Pressure | DN10-DN2000 | Carbon Steel, Alloy Steel |
| Sealing Surface | RF, FF, MFM, TG, RJ | - | - | - |
| Coating | Varnish, Black Paint, Anti-rust Oil, Galvanizing | - | - | - |
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 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.
| Material | Grade |
|---|---|
| Carbon Steel | ASTM A105, Q235, S235JR, C22.8, A350 LF2 |
| Alloy Steel | ASTM A182 F1, F5, F9, F11, F12, F22, F91 |
| Stainless Steel | ASTM A182 F304, 304L, F316, 316L, 321 |
| Duplex Steel | F51, F53, F55, S31803, S32205, S32750 |
| Nickel Alloy Steel | Inconel 600, Inconel 625, Incoloy 825, Hastelloy C276 |
| Copper Alloy | CuNi 90/10, CuNi 70/30 |
| Titanium | Grade 2, Grade 5, Grade 7 |

Plate Flange Dimension Drawing with OD ID BCD Bolt Hole and Thickness
| Standard | Pressure Rating | Common Size Range | Common Type |
|---|---|---|---|
| EN 1092-1 Type 01 | PN6, PN10, PN16, PN25, PN40 | DN10-DN4000 | Plate Flange for Welding |
| DIN 2576 | PN10, PN16 | DN10-DN2000 | Flat Plate Flange |
| BS 4504 | PN6-PN40 | DN10-DN1500 | Plate Flange |
| JIS B2220 | 5K, 10K, 16K, 20K | DN10-DN1500 | Steel Pipe Flange |
| Custom Drawing | Customized | Customized | Non-standard Plate Flange |
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.
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.

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.

Comprehensive Fabricating Capabilities
We coordinated manufacturing, warm treatment, machining, testing, and bundling beneath one roof. You get steady quality control all through the whole generation process.
International Standards Compliance
Our products meet ASME, EN, DIN, JIS, and GOST standards. You can specify the exact requirements for your regional applications with confidence.

Extensive Estimate Run
From DN15 to DN4000, we cover essentially all mechanical necessities. Your ventures advantage from single-source obtainment convenience.
Quality Affirmation
Progressed testing offices guarantee each product meets details. You get certified items with total traceability documentation.
Global Trade Involvement
Our items serve markets over Europe and the Americas. You work with demonstrated providers who get it worldwide quality expectations.
Competitive Preferences
Prevalent quality, competitive estimating, secure bundling, and quick conveyance combine to back your extend timelines and budgets.


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.
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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