Comprehensive analysis of the basic advantages of flange types

As the core connectors of industrial piping systems, flanges are of various types with different functions. From petrochemical to food and medicine, different industries have strict technical requirements for flange selection. This article will systematically introduce the mainstream Flange Types and their application scenarios, providing professional reference for engineering design and procurement.

1. Flat Welding Flange (SO flange)  
- Structural features: flange ring and pipe are welded with fillet weld on one side  
- Advantage: low cost, convenient installation 

2. butt-welding flange (WN flange) 
- Structural features: with a tapered neck transition section, butt welding with the pipeline  
- Advantage: strong fatigue resistance, bearing pressure up to 25MPa

3. Socket Welding Flange (SW Flange) 
- Structural features: pipe inserted into the flange bore for internal and external double-sided welding  
- Advantage: good sealing, suitable for small diameter pipes

4. Blind flange (BL flange)  
- Function: pipe end blocking 

5. Reducing flange  
- Function: connecting pipes of different diameters

With the development of new materials and intelligent monitoring technology, flange design is evolving in the direction of “lightweight + Internet of Things”. Understanding flange types is not only a necessary course for technicians, but also an important part of industrial safety.