Common sense analysis of stainless steel flange
The advantages of stainless steel slip on flange
The first is to replace part of the machined products, and than the mechanical workpiece, casting, forging structural parts light weight, save materials; Second, it saves working procedures and working hours and reduces the cost of the workpiece.
Types of flanges
There are many types of flanges, which can be summarized into the following main types: Slip on flange, welding neck flange, socket weld flange, lap joint flange, threaded flange and blind flange.
Flange with variable wall thickness refers to the change of wall thickness along the length of stainless steel. With edge and bottom sealing flange of a class, increase the pipe’s overall strength to pipe the inner or outer edge or the flange end seal flange.
Variable diameter flange, refers to the end of the pipe or a part of the pipe diameter decreases.
Expanding flange, according to the requirements of the flange end or a part of the expansion to form a variety of shapes of the flange.
stainless steel Flange processing method
There are many processing methods for flanges, most of which belong to the category of mechanical processing. The most used are stamping method, forging method, roll processing method, rolling method, expansion method, drawing method, bending method and combined processing method.
In short, flange processing is an organic combination of mechanical processing and metal pressure processing.
classification
According to the material, there are 304,321,310 and so on.
According to production standards, there are international standards, American standards, German standards and so on. .
Knowledge of processing
- Arc starting with neck flange multi-pass multi-layer welding using back welding method, arc should be filled with arc pit. Do not arc or arc on the base material surface of pipe and flange. In the arc or arc found holes, cracks and other defects should be dealt with clean.
- The inside of the weld should be filled with argon during positioning welding.
- Stainless steel cutting with neck flange cannot be cut with ordinary grinding wheel. Special grinding wheel or plasma should be used for cutting.
- After welding, the flange should be pickled and passivated.
