DIN 2635 PN40 A105 Carbon Steel / 316 Stainless Steel Flanges Weld Neck Raised Face Flanges From DN 10 To DN 500

DIN 2635 Carbon Steel and Stainless Steel Weld Neck Flanges WNRF PN40 for Industrial Purposes

Introduction:

We are Shaanxi Peter International Trade Co., Ltd., an experienced and reputable company with over 20 years of expertise in providing high-quality DIN weld neck flanges. Our commitment as a reliable supplier has earned us a strong reputation in the industry.

DIN weld neck flanges are designed to be butt-welded to the end of a pipe. They feature a long tapered hub that gradually merges with the pipe, providing reinforcement and minimizing stress concentrations. These flanges are commonly used in Europe, particularly in Germany, as they adhere to the specific dimensional and technical requirements set by DIN standards.

Our DIN weld neck flanges are available in a variety of materials, including carbon steel, stainless steel, and alloy steel. This versatility allows them to be utilized in diverse applications across industries such as oil and gas, petrochemical, power generation, and more.

Description of DIN Weld Neck Flanges:

Weld neck flanges are easily identifiable by their long tapered hub, which serves a critical role in providing reinforcement when welded to a pipe. The welding of the flange's neck to a pipe enables the transfer of stress from the flange to the pipe, resulting in improved support and stability. These flanges are widely used in applications that involve high pressure and extreme temperatures, where the joint's reliability and strength are paramount.

At Shaanxi Peter International Trade Co., Ltd., we specialize in offering raised face weld neck flanges that conform to DIN standards. These standards ensure dimensional compatibility and adherence to specific technical specifications, facilitating seamless integration into diverse piping systems. Our flanges are available in both carbon steel and stainless steel options, catering to different operating conditions and corrosion resistance requirements.

DIN 2635 Weld Neck Flange Dimensions:

1.Dimensions are in millimeters(mm).

2.Dimensions can be specified by different purchasers.

Process of DIN Weld Neck Flanges to a pipe:

Preparation: Start by ensuring that both the weld neck flange and the pipe are clean and free from any contaminants, such as dirt, oil, or rust. Use appropriate cleaning methods, such as wire brushing or grinding, to achieve a clean surface.

Alignment: Proper alignment between the weld neck flange and the pipe is crucial for a successful weld. Align the flange and the pipe, ensuring that the bolt holes on the flange match those on the mating flange or equipment.

Tack Welding: To temporarily secure the flange in position, perform tack welding. Tack welds are small, intermittent welds that hold the flange and the pipe together. These welds should be strong enough to maintain alignment but easily removable during the final welding process.

Welding: Once the flange is tack welded, proceed with the final welding. The specific welding process may vary depending on the materials being joined, but typically, shielded metal arc welding (SMAW) or gas tungsten arc welding (GTAW) is used for welding weld neck flanges to pipes.

SMAW: In shielded metal arc welding, an electrode coated with flux is used. The electrode is consumed during the welding process, creating a protective shield of gas and slag to prevent contamination. The welder moves the electrode along the joint, melting both the flange and the pipe material, and creates a weld bead.

GTAW: Gas tungsten arc welding, also known as TIG (tungsten inert gas) welding, uses a non-consumable tungsten electrode and an inert gas shield for protection. The welder manually feeds filler metal into the weld pool as needed. GTAW provides precise control over the welding process and is commonly used for welding stainless steel and other non-ferrous materials.

Post-Welding: After completing the welding process, it is important to inspect the weld for any defects, such as cracks or incomplete fusion. Visual inspection, dye penetrant testing, or other non-destructive testing methods may be employed to ensure the quality of the weld.

Materials of DIN Weld Neck Flanges:

DIN weld neck flanges are available in various materials to suit different applications and operating conditions. The material selection for DIN weld neck flanges depends on factors such as temperature, pressure, corrosion resistance, and compatibility with the conveyed fluid or gas.

Grades of Carbon Steel:

1.Q235: Q235 is a commonly used carbon structural steel grade specified in the Chinese national standard GB/T 700. It is often used in general engineering structures and manufacturing industries. In carbon steel flanges, Q235 material is commonly used for pipeline systems operating at low pressure, low temperature, and non-critical stress environments.

2.A105: A105 is a carbon steel material specified in the American ASTM standard, complying with ASTM A105/A105M requirements. A105 material has good weldability and mechanical properties, making it suitable for use in a wide temperature range from low to high temperatures. It is commonly used for pipeline systems and valve connections under high temperature and high-pressure conditions.

3.A350 LF2: A350 LF2 is also a carbon steel material specified in the ASTM standard, complying with ASTM A350/A350M requirements. LF2 indicates low-temperature service, and this material has good low-temperature toughness and crack resistance. It is commonly used for pipeline systems and valve connections under low-temperature conditions.

4.A694 F42/F52/F60/F65/F70: These material grades are specified in the ASTM A694 standard for carbon steel materials used in high-strength, low-temperature, or normal temperature high-pressure pipeline systems and valve connections. Different grades of materials have different strengths and corrosion resistance properties, suitable for various working conditions.

5.ASTM A181 Gr.1/Gr.2: These carbon steel flange material grades are suitable for pressure vessels, valves, and pipeline fittings under low pressure and low temperature conditions. They have good machinability and mechanical performance.

6.ASTM A516 Gr.70: Gr.70 is a commonly used medium carbon steel grade, known for its good weldability and machinability, suitable for manufacturing flanges and pipe fittings, among others.

7.A216 WCB: A216 WCB is a carbon steel casting material specified in the American ASTM standard, complying with ASTM A216/A216M requirements. WCB stands for cast carbon steel, and it is commonly used for carbon steel flanges that require casting in general engineering structures and manufacturing industries.

Grades of Stainless Steel:

1.ASTM A182 F304/304L: This is a common material grade for stainless steel flanges, suitable for general industrial applications. It primarily consists of 18% chromium and 8% nickel, providing good corrosion resistance and oxidation resistance. F304L is the low carbon version, suitable for use in welding conditions.

2.ASTM A182 F316/316L: This is a material grade with better corrosion resistance, commonly used in corrosive environments such as chemical, petroleum, and marine industries. It contains 16-18% chromium, 10-14% nickel, and 2-3% molybdenum, which enables resistance against strong corrosive media like sulfuric acid and hydrochloric acid. F316L is the low carbon version, helping to reduce intergranular corrosion during welding.

3.ASTM A182 F321: This is a titanium-stabilized material grade for stainless steel flanges, suitable for high-temperature environments. It contains 18-20% chromium, 9-12% nickel, and also includes 0.15-0.30% titanium, enhancing corrosion resistance and high-temperature performance.

Applications of DIN 2635 Weld Neck Flanges:

DIN 2635 weld neck flanges are utilized in various applications where their specific characteristics are advantageous. Some common applications of DIN 2635 weld neck flanges include:

Petrochemical Industry: DIN 2635 weld neck flanges are commonly employed in the petrochemical industry for connecting pipelines, equipment, and vessels. Their robust construction and high-pressure capabilities make them suitable for handling corrosive fluids, high temperatures, and extreme pressures.

Oil and Gas Sector: In the oil and gas sector, DIN 2635 weld neck flanges find application in offshore platforms, refineries, and pipelines. They provide a reliable and leak-proof connection, ensuring the safe and efficient transport of oil, gas, and other hydrocarbon products.

Chemical Processing: DIN 2635 weld neck flanges are used in chemical processing plants where resistance to corrosive chemicals and high temperatures is essential. Their ability to withstand aggressive substances and maintain integrity under demanding conditions makes them suitable for various chemical processes.

Power Generation: Weld neck flanges are widely employed in power generation facilities, including thermal power plants and nuclear power plants. DIN 2635 weld neck flanges are used in piping systems for transporting steam, hot water, and other fluids at high pressures and temperatures.

Shipbuilding: Shipbuilding and marine applications often require weld neck flanges for connecting pipes, valves, and other equipment on ships and offshore platforms. DIN 2635 weld neck flanges are chosen for their reliability, strength, and resistance to harsh marine environments.

Food and Beverage Industry: In the food and beverage industry, DIN 2635 weld neck flanges are utilized in sanitary piping systems. Stainless steel weld neck flanges are particularly preferred due to their hygienic properties and resistance to corrosion, making them suitable for handling food, beverages, and pharmaceutical products.