Socket Weld Neck Flanges


M-Pipe & Fitting Solution Inc is a reputable company that manufactures and supplies high-quality socket weld neck flanges. Socket weld neck flanges are vital components used in various industrial applications to connect pipes and facilitate smooth flow. 

What are Socket Weld Neck Flanges?

Socket weld neck flanges are pipe flanges that have a neck with a socket-like opening for pipe insertion. These flanges are welded to the pipe for a solid and leak-free joint. They consist of a round plate with bolt holes and a tapered hub, allowing easy alignment and connection of pipes. It provide excellent structural integrity and are commonly used in high-pressure and high-temperature applications.

Stainless Steel Socket Weld Neck Flanges: Stainless Steel socket weld neck flanges are highly popular due to their exceptional corrosion resistance, making them suitable for various industries, including oil and gas, chemical, and petrochemical. These flanges offer excellent strength and durability, even in harsh environments. Stainless Steel socket weld neck flanges are available in different grades, such as 304, 316, and 316L, offering varying levels of corrosion resistance and mechanical properties. Their smooth surface finish facilitates easy cleaning and maintenance. They are commonly used in applications where hygiene and sanitation are crucial, such as food processing and pharmaceutical industries.

Carbon Steel Socket Weld Neck Flanges: Carbon Steel socket weld neck flanges are widely used in industrial applications due to their strength, affordability, and versatility. These flanges exhibit excellent tensile strength and can withstand high temperatures and pressures. Carbon steel socket weld neck flanges are available in different grades, including ASTM A105 and A350 LF2, offering various levels of toughness and resistance to corrosion. They are commonly used in power generation, oil refineries, and chemical plants.

Duplex Steel Socket Weld Neck Flanges: Duplex steel socket weld neck flanges are known for superior strength, excellent corrosion resistance, and high flexibility. These flanges are made from a combination of austenitic and ferritic stainless steels, offering enhanced mechanical and corrosion-resistant properties. Duplex steel socket weld neck flanges are ideal for demanding applications such as offshore oil and gas exploration, chemical processing, and desalination plants. They provide exceptional resistance to pitting, crevice corrosion, and stress corrosion cracking.

Applications of Socket Weld Neck Flanges:

Socket weld neck flanges find application in various industries, including oil and gas, chemical, petrochemical, power generation, food processing, and pharmaceuticals. They are commonly used in pipelines, equipment connections, and systems requiring high pressure, high temperature, and reliable leak-free joints. These flanges are particularly suitable for systems that require frequent disassembly and maintenance.

Advantages of Socket Weld Neck Flanges: 

Socket weld neck flanges offer several advantages that make them a preferred choice in many industrial applications. Some of the key advantages include:
Strong and Leak-Free Joints: It provide a robust and secure joint, minimizing the risk of leakage even under high-pressure conditions. The welding process ensures a tight and reliable connection between the flange and the pipe.

Enhanced Structural Integrity: The design of socket weld neck flanges, with a tapered hub and a welded neck, enhances the overall structural integrity of the joint. It makes them suitable for applications where strength and durability are paramount.

Easy Alignment: The socket-like opening of the weld neck flanges allows for easy pipe alignment during installation. It simplifies the assembly process and ensures proper alignment for efficient flow.

Space Saving: Socket weld neck flanges have a compact design compared to other flanges. They require less space, making them ideal for applications where space is limited or when the proximity of pipes is required.

Suitable for High-Pressure and High-Temperature Applications: Socket weld neck flanges are commonly used in systems that operate under high-pressure and high-temperature conditions. Their sturdy construction and welding provide excellent resistance to internal and external forces.

Factors to Consider in Flange Selection: When selecting socket weld neck flanges, there are several factors to consider to ensure optimal performance and compatibility with the application.

Material Compatibility: Choose a flange material compatible with the fluid or gas being conveyed. Stainless, carbon and duplex steel are popular options due to their corrosion resistance and mechanical properties.
Pressure and Temperature Ratings: Consider the operating pressure and temperature of the system to select flanges that can withstand specific conditions. Refer to industry standards and specifications to ensure the flanges meet the required ratings.

Flange Dimensions: Consider the flange dimensions, including size, diameter, and thickness, to ensure proper fit and alignment with the piping system.

Standards and Certifications: Verify that the flanges meet relevant industry standards and certifications, such as ASTM, ASME, or API. Compliance with these standards ensures quality and performance.

Application-Specific Requirements: Consider any specific requirements of the application, such as corrosion resistance, material strength, or compatibility with specialized processes. Consult with experts or refer to industry guidelines to make an informed decision.

Installation and Maintenance Tips: Proper installation and regular maintenance are crucial for optimal performance and longevity of socket weld neck flanges. Here are some essential tips:
Welding: Ensure that the welding process is performed by qualified personnel using appropriate techniques and equipment. Proper weld penetration and inspection are essential for a solid and leak-free joint

Bolt Tightening: Follow recommended torque values and tightening procedures when securing bolts to prevent leakage and maintain joint integrity

Inspection: Regularly inspect socket weld neck flanges for signs of wear, corrosion, or damage. Pay attention to welds, bolt holes, and gasket surfaces. Address any issues promptly to avoid potential leaks or failures.
Gasket Selection: Choose gaskets compatible with the fluid or gas being conveyed and the operating conditions. Proper gasket selection is crucial for ensuring a reliable and leak-free seal.

Maintenance Schedule: Establish a maintenance schedule that includes routine inspections, cleaning, and replacement of gaskets if necessary. Adhere to manufacturer recommendations and industry best practices.
Socket weld neck flanges connect pipes and ensure a secure and leak-free joint in various industrial applications. Stainless steel, carbon steel, and duplex steel socket weld neck flanges offer unique features and benefits, making them suitable for different requirements. By understanding their characteristics and applications, you can make informed decisions about selecting the correct type of socket weld neck flanges for your specific needs. M-Pipe & Fitting Solution Inc provides certified flanges that meet international standards such as API, ASTM, and ISO 9001:2015.

ASME B16.5 Socket Weld Flange Size Chart1/2″ (15 NB) to 48″ (1200NB) DN10~DN5000
Socket Weld Flange StandardsANSI/ASME B16.5, B16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, GOST Flange, ASME/ANSI B16.5/16.36/16.47A/16.47B, MSS S44, ISO70051, JISB2220, BS1560-3.1, API7S-15, API7S-43, API605, EN1092


Stainless SteelASTM / ASME 201, 202, 301, 304, 304L, 310, 310S, 316L, 316TI, 317, 317L, 321, 347, 409, 409M, 409L, 410, 410S, 420, 430, 431, 441, 444, 446, 17.4PH, 904L

All information in our datasheet is grounded on approximate testing and is stated formal of our knowledge & belief.  It’s presented piecemeal from contractual scores and doesn’t constitute any guarantee of properties or of processing or operation possibilities in individual cases. Our guarantees and arrears are stated simply in our terms of trade.

  • Gas Processing Industry
  • Pharmaceuticals Industry
  • Chemical Industry
  • Pulp and Paper Industry
  • Sea Water Equipment
  • Heat Exchangers
  • Condensers