Neck welding flange, also known as neck welding steel pipe flange, is an important pipeline connection component. The following is a detailed explanation of the neck flat welding flange:

1、 Definition and Structure

Neck welding flange is a flange that extends steel pipes, fittings, etc. into the flange and connects them to equipment or pipelines through fillet welds. Its structural features include a flange with an inner hole at the center for inserting pipes or fittings. There are also multiple screw holes on the flange to match with bolts and achieve a tight connection between the flanges. In addition, one side of the flange is equipped with a neck shaped protrusion, whose inner diameter is equal to the inner diameter of the inner hole and connected to each other. This design enhances the strength and load-bearing capacity of the flange.

2、 Manufacturing process and materials

The manufacturing process for neck flat welding flanges is usually forging. Its material is ordinary steel plate with the required thickness, which is machined. The selection of this material ensures that the neck welding flange has sufficient strength and rigidity to withstand certain pressure and temperature fluctuations.

3、 Performance characteristics

Stable connection: The neck flat welding flange is connected to the pipeline or pipe fittings through fillet welds, with high weld strength and stable and reliable connection.

Good sealing performance: The sealing surface between the flange and the pipeline or pipe fittings is usually in the form of a flat or protruding surface, and with appropriate gaskets, a good sealing effect can be achieved.

Wide applicability: The neck flat welding flange is suitable for pipelines with significant temperature or pressure fluctuations, as well as high temperature, high pressure, and low temperature pipelines. At the same time, it is also suitable for pipelines transporting expensive media, flammable and explosive media, and toxic gases.

4、 Nominal pressure and specifications

The nominal pressure of a flange with neck flat welding is usually 0.6~4.0MPa, depending on the material, size, and manufacturing process of the flange. Different specifications of neck flat welding flanges have different connection sizes and screw hole quantities to meet the connection requirements of different pipeline systems.

5、 Precautions

When selecting a neck flat welding flange, a reasonable selection should be made based on the pressure, temperature, medium, and other conditions of the pipeline system to ensure that the strength and sealing performance of the flange meet the requirements.

During the installation process, it is important to ensure accurate alignment between the flange and the pipeline or fittings to avoid issues such as welding deformation or poor sealing.

Regularly inspect and maintain the neck welding flange, promptly identify and address potential safety hazards.

In summary, the neck flat welding flange is an important pipeline connection component, which has the characteristics of stable connection, good sealing, and wide applicability. Reasonable selection and use of neck welding flanges in pipeline systems are of great significance for ensuring the safe and stable operation of the system.

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