Steel Pipe Accessories-Flange Types

A flange is a component that connects process pipelines. This type of connection has a wide range of applications, such as the connection between pipelines and process equipment and the connection of flange valves and accessories on pipelines. The use of plumbing flange connections not only provides flexibility in installation and disassembly but also provides reliable sealing.
Process pipelines transport a wide variety of media with different temperatures and pressures, so different requirements are put forward for the strength and sealing of flanges. In order to meet the needs of process pipeline installation projects, many flanges with different structures and pressures have appeared.

Flat Flange

A flat flange is the most commonly used type of medium- and low-pressure process pipeline. This method of fixing the flange and the pipe is to put the flange on the pipe end and weld the inner and outer openings of the flange to fix the flange.Common materials include carbon steel, stainless steel, alloy steel, and non-ferrous alloys such as brass or bronze. The choice of material depends on factors such as temperature, pressure, corrosion resistance, and compatibility with the fluid being transported.
For example:
1. EN1092-1 flange. Type 01/01B plate flanges feature a flat and smooth surface, making them ideal for applications where the mating surfaces require alignment without any protrusions. This design ensures a uniform distribution of pressure and facilitates a secure connection between pipes or fittings, minimizing the risk of leaks or failures. Type 01 plate flanges are flat-faced flanges without a raised surface, providing a smooth and flush connection between mating components. On the other hand, Type 01B plate flanges feature a raised face around the bore, which acts as a sealing surface when compressed against a gasket. Both types offer distinct advantages, depending on the specific requirements of the application. They are manufactured using advanced machining techniques and quality control measures to ensure dimensional accuracy, surface finish, and mechanical strength. This attention to detail results in reliable and durable flange components that withstand harsh operating conditions.

2. DIN86044 PLATE FLANGE. The DIN 86044 Plate Flange is a crucial component in marine piping systems, engineered to provide a secure and leak-free connection between pipes, valves, or equipment on ships and offshore platforms. Manufactured in accordance with the German standard DIN 86044, this flange offers exceptional reliability, precision, and compatibility, specifically tailored to meet the demanding requirements of marine applications.

3. GOST 12820/33259 PLATE FLANGE. The GOST 12820/33259 Plate Flange is a crucial component in industrial piping systems, engineered to provide a secure and leak-free connection between pipes, valves, or equipment. Manufactured in accordance with the Russian standards GOST 12820 and GOST 33259, this flange offers exceptional reliability, precision, and compatibility across various industrial applications.

4.BS 4504 PLATE FLANGE 101. The BS 4504 Plate Flange 101 is an essential component in industrial piping systems, designed to facilitate secure and leak-free connections between pipes or equipment. Manufactured in accordance with the British Standard BS 4504, Flange 101 offers exceptional reliability, precision, and compatibility across a wide range of applications.

5.BS10 PLATE TABLE D/E/F/H. BS10 Plate flanges are another commonly used type of flange in piping systems. The designation "Table D/E/F/H" refers to the pressure ratings and dimensions of these flanges according to the BS10 standard.

Welding Neck Flange

Welding neck flange, also called high neck flange or big tail flange. It has high strength, is not easily deformed, has good sealing performance, has various forms of sealing surfaces, and is suitable for a wide range of pressures.Welding neck flange can be divided into four main categories based on their surface.
For example:
1. DIN2633 WELDING NECK. The DIN 2633 Welding Neck Flange is a critical component in industrial piping systems, engineered to provide a strong and leak-free connection between pipes or fittings. Manufactured in accordance with the German standard DIN 2633, this flange offers exceptional reliability, precision, and compatibility across various industrial applications.

2. EN1092-1 FLANGE: TYPE 11/11B WELDING NECK FLANGE. The TYPE11/11B Welding Neck Flange is an essential component in piping systems, designed to facilitate a strong and leak-free connection between pipes or fittings. Engineered for reliability and durability, this welding neck flange offers exceptional performance across a wide range of industrial applications.

3. GOST 12821/33259 WELDING NECK FLANGE. The GOST 12821/33259 Welding Neck Flange is a critical component in industrial piping systems, designed to facilitate a strong and leak-free connection between pipes or fittings. Manufactured in accordance with the Russian standards GOST 12821 and GOST 33259, this flange offers exceptional reliability, precision, and compatibility across various industrial applications.

4.ANSI B16.5: WELDING NECK FLANGE. The ANSI B16.5 Welding Neck Flange is a crucial component in piping systems, designed to provide a strong and leak-free connection between pipes or fittings. Manufactured in accordance with the American National Standards Institute (ANSI) B16.5 standard, this flange offers exceptional reliability, precision, and compatibility across a wide range of industrial applications.

5.BS 4504 WELDING NECK FLANGE 111. The BS 4504 Welding Neck Flange 111 is a vital component in industrial piping systems, designed to facilitate a strong and leak-free connection between pipes or fittings. Manufactured in accordance with the British Standard BS 4504, Flange 111 offers exceptional reliability, precision, and compatibility across various applications.

LOSSE PLATE FLANGE

This kind of flange is not directly welded to the pipe but uses the pipe flange or welding ring as the sealing contact surface. The loose plate flange plays a fastening role. It is mostly used for non-ferrous metals such as copper, aluminum, and lead, as well as stainless steel and acid-resistant steel pipes. Its biggest advantage is that because the flange can move freely, it is very convenient to insert bolts into the flange.
For example:
1. DIN 2641 2642LOSSE PLATE FLANGE. The DIN 2641/2642 Loose Plate Flange is a versatile component in industrial piping systems, designed to provide a flexible and reliable connection between pipes, valves, or fittings. Manufactured in accordance with the German standard DIN 2641/2642, this flange offers exceptional reliability, precision, and compatibility across various industrial applications.

2. EN1092-1 FLANGE: TYPE 02/04 LOSSE PLATE FLANGE. The EN1092-1 Flange Type 02/04 Loose Plate Flange is a type of flange that is widely used in industrial piping systems.

Threaded Flange

threaded flange is a flange that uses a threaded flange to connect to the pipe end thread. There are two types: high pressure and low pressure. Low-pressure threaded flanges are made of steel and cast iron. This kind of flange was widely used in the early days of the founding of the People's Republic of China, when welding technology was poor. With the development of industry, low-pressure threaded flanges have been replaced by flat welding flanges, which are basically not used except in special circumstances. High-pressure threaded flanges are widely used in the connection of modern industrial pipelines. The seal is formed by the pipe end and the lens gasket, which requires high-precision processing of the contact surface between the thread and the pipe end gasket. The characteristic of this kind of flange is that the flange does not come into contact with the medium in the pipe, and the installation is relatively easy.
For example:
1.ANSI B16.5 THREADED FLANGE. The ANSI B16.5 Threaded Flange is a vital component in piping systems, designed to provide a secure and leak-free connection between pipes, valves, or fittings. Manufactured according to the American National Standards Institute (ANSI) B16.5 standard, this flange offers exceptional reliability, precision, and compatibility across a wide range of industrial applications.

2.BS 4504: THREADED FLANGE 1113. The BS 4504 Threaded Flange 1113 is a critical component in piping systems, engineered to provide a secure and leak-free connection between pipes, valves, or fittings. Manufactured in accordance with the British Standard BS 4504, Flange 1113 offers exceptional reliability, precision, and compatibility across various industrial applications.

3.BS10 THREADED TABLE D/E/F/H. BS10. Threaded Flanges are essential components in piping systems, designed to facilitate secure and leak-free connections between pipes, valves, or fittings. Available in various table ratings, including Table D, E, F, and H, these flanges offer exceptional reliability, precision, and compatibility across a wide range of industrial applications.

4. EN1092-1 FLANGE: TYPE 13 HUBBED THREADED FLANGE. The TYPE13 Hubbed Threaded Flange is a vital component in piping systems, engineered to provide a secure and leak-free connection between pipes, valves, or fittings. Designed for reliability and efficiency, this threaded flange offers exceptional performance across a wide range of industrial applications.

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