Stainless Steel Welded Flange

Stainless steel butt welding flange is a flange with a neck, a smooth transition section, and is connected to the pipe by butt welding. The strength and rigidity of this flange have been enhanced, and the sealing is better than that of the flat welding flange, but the disadvantage is that it needs to be manufactured using forgings, which consumes more materials and has a relatively high manufacturing cost. Stainless steel butt welding flanges are usually used in occasions that require higher sealing and strength requirements, such as chemical, petroleum and other industries.

There are many types of stainless steel butt welding flanges, and common types include but are not limited to:

Slip welding flange: A flange that requires the pipe to be inserted into the inner ring of the flange for welding.

Butt welding flange: A flange with a neck and a smooth transition section, which is connected to the pipe by butt welding.

Socket welding flange: A flange with a socket, which is connected to the pipe by socket welding.

Threaded flange: A flange with threads, which is connected to the pipe by threads.

When choosing to use stainless steel butt welding flanges, its advantages and disadvantages, as well as the specific use environment and technical requirements should be considered. In addition, when purchasing, you should try to choose national standard flanges to avoid using non-standard materials or manufacturing processes to ensure the quality and safety of the product.

Stainless steel butt welding flange is a common pipe fitting, and its material is diverse, including but not limited to 304 stainless steel. 304 stainless steel flange is the same as flanges of other materials, common types include flat welding flange, butt welding flange, socket welding flange, threaded flange, etc. Butt welding flange, also known as welding neck flange, is a flange with a neck and a round tube transition, which is connected to the pipe by butt welding. In addition, there is 2205 duplex stainless steel flange, which is composed of 22% chromium, 2.5% molybdenum and 4.5% nickel-nitrogen alloy, with high strength and good resistance to stress corrosion.

The material selection of stainless steel butt welding flange depends on the specific application requirements, including but not limited to 304, 316, 316L and other stainless steel materials, these materials have good corrosion resistance and mechanical properties, suitable for a variety of industrial application scenarios.

Stainless steel butt welding flanges come in a variety of specifications and models, including but not limited to the following:

1. Material: The materials of stainless steel butt welding flanges include 304, 304L, 321, 316, etc.

2. Standards: Commonly used standards include national standards (GB/T9112-2010, etc.), chemical standards (HG20592-2009), American standards (ANSI B16.5 Class150, 300, 600, 900, 1500, etc.), Japanese standards (JIS 5K, 10K, 16K, 20K, etc.) and German standards (DIN2573, 2572, 2631, etc.).

3. Pressure level: The pressure level ranges from PN0.25 to PN42.0. ‌

4. Application fields: Widely used in refineries, chemical plants, power plants, environmental protection equipment, high-rise buildings, shipyards, paper mills, pharmaceutical factories, chemical machinery manufacturing, steel mills, heating pipelines, sewage treatment, pesticide factories and other industries. ‌

5. Customized services: Customized services are provided, including sample processing, other processing services and delivery to the factory. ‌

6. Specifications: Complete specifications, including Ф1022.5-18, Ф1203-18, etc. ‌

Stainless steel butt welding flanges have various specifications and models to meet the needs of different industries and applications. To choose a suitable stainless steel butt welding flange, you need to consider factors such as material, standard, pressure level and application field.

The use scenarios of stainless steel butt welding flanges mainly include high-temperature, high-pressure, and low-temperature pipeline connections.

Stainless steel butt welding flanges are a type of pipe fittings whose design features include neck and round tube transitions, which are used for butt welding with pipes. This type of flange is mainly used in scenarios with large environmental changes, such as the connection of high-temperature, high-pressure, and low-temperature pipelines. 304 stainless steel butt welding flanges are particularly suitable for pipeline connections under these extreme conditions due to their excellent corrosion resistance and mechanical properties. Its working principle is to ensure the sealing and stability of the connection by fixing two pipes or pipe fittings on a flange, adding flange gaskets between the two flanges, and then tightening them with screws.

The advantages of stainless steel butt welding flanges include their ability to connect and maintain the sealing performance of pipelines, facilitate replacement or inspection of a certain section of pipelines, and facilitate the closure of certain pipeline sections. According to the different shapes of the mating surfaces, stainless steel butt welding flanges can be divided into various types, such as smooth type, concave-convex type, tongue-and-groove type, trapezoidal groove type, lens type, and O-ring type to meet different working pressure and medium requirements. ‌

In pipeline engineering, stainless steel butt welding flanges have become a common connection method due to their standardized design and wide applicability. Although their varieties and specifications may be fewer and their production scale is smaller, stainless steel butt welding flanges are still an important pipeline connection solution in the case of poor circulation.

The technical parameters of stainless steel butt welding flanges include bolt hole center circle diameter, bolt hole diameter, flange thickness, pipe outer diameter, flange inner diameter and flange theoretical weight. ‌

The bolt hole center circle diameter ranges from 50mm to 2130mm. This parameter determines the layout and spacing of the bolt holes on the flange, and has an important impact on the connection strength and stability of the flange. ‌

The bolt hole diameter is between 11mm and 30mm. This parameter directly affects the selection and use of bolts. Too small or too large bolts may affect the sealing and structural strength of the flange. ‌

The flange thickness is between 12mm and 58mm. The thickness is related to the bearing capacity and durability of the flange. Thicker flanges can better resist external pressure and impact. ‌

The pipe outer diameter ranges from 17.2mm to 2032mm. This parameter determines the tightness of the flange and the pipe, which is crucial to ensure the tightness and safety of the connection. ‌

The inner diameter of the flange ranges from 18mm to 2036mm. The size of the inner diameter directly affects the flange's usage scenario and flow control. A larger inner diameter is suitable for large flow systems. ‌

The theoretical weight of the flange ranges from 0.36kg to 234.6kg. The weight reflects the material usage and structural complexity of the flange. Heavier flanges usually have better structural stability and load-bearing capacity. ‌

The selection and determination of these technical parameters require careful calculation and selection based on the specific use environment and requirements to ensure the performance and safety of the flange. ‌In addition, the production processes of large butt-welded flanges include forging, rolling and splicing. The selection of these processes will also affect the technical parameters and performance of the final product.