DIN Flanges

DIN Flanges Descriptions

DIN Flanges are pipeline connection components manufactured according to German DIN standards. Their dimensions, bolt patterns, pressure ratings, sealing surfaces, and connection structures are standardized to provide reliable compatibility between pipes, valves, pumps, pressure vessels, and industrial equipment.

Depending on operating pressure, temperature, medium, and installation requirements, DIN Flanges can be manufactured from carbon steel, stainless steel, alloy steel, and duplex stainless steel.

They are available in multiple designs, including Weld Neck, Slip On, Blind, Threaded, Plate, Loose, and Lap Joint Flanges.

Here is a detailed feature and performance table for DIN Flanges:

Plate flanges

Our plate flanges are in accordance with ANSI/ASME, DIN and other international standards. Designed for pressure from PN2.5 to 40

Plate flanges

Slip-on flanges

Our slip-on flanges are designed to easily slide over pipes, featuring an inside diameter slightly larger than the pipe's outside diameter. Connected via fillet welds at both the top and bottom. Ideal for applications requiring ease of installation and adjustment, as they lack a weld bevel, allowing for flexibility in pipe length. While commonly used in lower pressure systems, they can also be made with a lap joint style for enhanced connection strength when needed.

Slip-On Flanges

Weld Neck Flanges

It is distinguished by its long, inclined high neck that extends from the flange and pipe weld joint to the flange face. Used in pipelines subject to significant thermal expansion or other loads causing high stress at the flange, are suitable for pipelines with significant fluctuations in pressure and temperature.

Socket Weld Flanges

A socket weld flange is a type of flange where the end of the pipe is inserted into a step-shaped flange ring. It offers better rigidity, minimal welding deformation, and improved sealing performance are used in boiler pressure vessels, petroleum, chemical engineering, shipbuilding, pharmaceuticals, metallurgy, machinery, stamped elbows, and food processing industries.

Socket weld flange

Threaded Flanges

Threaded flange has its inner bore machined with pipe threads and connects to pipes with matching threads. they are suitable for high-pressure pipe connections, but not to use in conditions where temperatures exceed 260°C or are below -45°C to avoid potential leakage.

Threaded Flanges

Lap Joint Flanges

lap joint flanges are designed to slide over pipes, commonly used with stub end fittings. This allows for easy rotation and alignment of bolt holes, making them ideal for applications requiring frequent disassembly. Available in sizes from 1/2" to 24", our flanges are manufactured from high quality stainless steel, ensuring compatibility with your specific needs. The taller hubs can be customized based on your requirements.

Lap Joint Flanges

Blind Flanges

Blind flange is a flange without a central hole, used to block the end of a pipeline. its function is similar to that of end caps and pipe caps, but a blind flange provides a removable sealing solution, whereas end caps are intended to be permanent.

Blind flanges

Advantages of DIN Flanges

Standardized Dimensions and Interchangeability

DIN Flanges are manufactured according to established German dimensional standards, providing consistent outside diameters, bolt-hole arrangements, flange thicknesses, and sealing dimensions. This makes installation, replacement, and maintenance easier across compatible piping systems.

Reliable Sealing Performance

Different DIN flange facing designs are available to suit specific operating conditions. When correctly matched with suitable gaskets, DIN Flanges provide dependable sealing for water, steam, gas, oil, and industrial process pipelines.

Wide Pressure Range

DIN Flanges are available in multiple nominal pressure ratings, including PN6, PN10, PN16, PN25, PN40, PN64, PN100, and higher depending on the applicable standard and flange type. This allows engineers to select suitable products for both low-pressure and high-pressure piping systems.

Multiple Connection Types

Our DIN Flanges are available in various designs, including weld neck flanges, slip-on flanges, blind flanges, threaded flanges, lap joint flanges, plate flanges, and other configurations. Different connection methods can therefore be selected according to installation and maintenance requirements.

Broad Material Selection

DIN Flanges can be manufactured from carbon steel, stainless steel, alloy steel, duplex stainless steel, and other materials. This provides suitable solutions for applications involving corrosion, high temperature, pressure, or demanding process environments.

Applications

Oil and Gas Industry

DIN Flanges are widely used in oil and gas pipelines, processing equipment, storage systems, and auxiliary piping. Different materials and pressure classes can be selected according to temperature, pressure, and medium requirements.

Water Treatment Systems

Municipal water supply, wastewater treatment, pumping stations, and industrial water systems commonly use DIN Flanges because of their standardized dimensions and convenient installation.

Chemical Processing

Chemical plants use DIN Flanges for process piping, reactors, storage tanks, heat exchangers, and equipment connections. Stainless steel, alloy steel, and duplex materials can be selected for corrosive operating environments.

Power Generation

DIN Flanges are used in steam, cooling water, condensate, and auxiliary piping systems in thermal power plants and other energy facilities. Higher pressure and temperature grades are available for demanding operating conditions.

Marine and Shipbuilding

Shipbuilding and offshore applications use DIN Flanges for seawater, cooling, fuel, drainage, and utility piping systems. Corrosion-resistant materials are available for marine environments.

Industrial Manufacturing

DIN Flanges are also widely applied in machinery, HVAC systems, food processing equipment, pressure vessels, pumps, valves, and general industrial piping.

Why Choose Us

DIN Standards Manufacturing Capability

We manufacture DIN Flanges according to applicable DIN and EN dimensional requirements. Products can also be supplied according to ASME, ANSI, JIS, BS, GOST, and other international standards for different projects and markets.

Comprehensive Production Capabilities

Our integrated manufacturing facilities cover raw material inspection, forging, heat treatment, machining, drilling, surface finishing, testing, marking, and packaging. This enables consistent quality control throughout the complete production process.

Extensive Size and Pressure Range

We can supply DIN Flanges in a wide range of nominal diameters and pressure ratings to meet different pipeline and equipment requirements. Both standard dimensions and customized products can be manufactured according to drawings or technical specifications.

Multiple Material Options

Available materials include carbon steel, stainless steel, alloy steel, duplex stainless steel, and other special grades. Material certificates can be provided according to project requirements.

Quality Assurance

Our DIN Flanges undergo dimensional inspection, visual inspection, material verification, and physical and chemical testing when required. Additional testing such as ultrasonic testing, PMI, hardness testing, and other inspections can also be provided according to customer specifications.

International Supply Experience

With experience supplying international industrial markets, we understand different dimensional standards, documentation requirements, inspection procedures, packaging requirements, and project specifications.

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COMPANY PROFILE

Shanxi HongKai Forging Co., Ltd. Was located in Dingxiang County, known as the "Hometown of Forging Flanges" in Shanxi Province, which is part of Chinese energy and heavy chemical industrial base. The area boasts convenient transportation, abundant coal and power resources, fast communication, and an excellent environment. The company has three big workshops in total. We have 20 years experiences in flanges and forging industry, we can produce 20, 000MT per year. We have strength capacity to produce the flange in every process.

Along with capabilities in forging and heat treatment, integrated production capabilities including machining, physical and chemical testing, surface treatment, and packaging and shipment. Possessing solid technical expertise, advanced production processes, and a complete quality inspection, reliable after-sales service, for customers worldwide and domestically multiple clients have provided a solid foundation for collaboration.

The flanges manufactured by our company comply with the American standard ASME B16.5/B16.47, European Standard EN1092-1, German Standard DIN, Japanese Standard JIS, Russian

 

 

 

 

 

 

FAQ

Q: What are DIN Flanges?

A: DIN Flanges are pipeline connection components manufactured according to German DIN standards or related European dimensional standards. They are widely used for connecting pipes, valves, pumps, pressure vessels, and other industrial equipment.

Q: What pressure ratings are available for DIN Flanges?

A: Common pressure ratings include PN6, PN10, PN16, PN25, PN40, PN64, and PN100. Available ratings depend on flange type, size, material, and the applicable DIN or EN standard.

Q: What types of DIN Flanges can you manufacture?

A: We can manufacture weld neck flanges, slip-on flanges, blind flanges, threaded flanges, lap joint flanges, plate flanges, loose flanges, and other DIN flange configurations according to project requirements.

Q: What materials are available for DIN Flanges?

A: Common materials include carbon steel, stainless steel, alloy steel, and duplex stainless steel. Special materials can also be supplied according to drawings, specifications, and operating conditions.

Q: What is the difference between DIN Flanges and EN Flanges?

A: DIN refers to German industrial standards, while EN refers to European standards. Many older DIN flange specifications have been replaced or integrated into EN standards, such as EN 1092-1. However, DIN designations are still widely used in international purchasing and engineering projects.

Q: Can DIN Flanges be customized?

A: Yes. We can manufacture DIN Flanges according to customer drawings and technical requirements, including customized dimensions, facing types, materials, drilling patterns, coatings, markings, and inspection requirements.

Contact Us

Ready to discuss your DIN Flanges requirements? Contact our technical team at kevin.zhao@hkflange.com for technical support, product selection, customized manufacturing, and competitive quotations.