Differences between stainless steel flanges and stainless steel butt-weld flanges
First, let's understand what stainless steel flanges and stainless steel butt-weld flanges are
Stainless steel flange: A flange that is connected to equipment or pipelines through corner welds. The structure of the flange is simple and the processing skills are relatively simple. It can be divided into plate flanges and neck flanges. Flanges are widely used in various low-pressure pipelines.
Stainless steel butt-weld flange: A flange with a neck and a round tube transition and butt-welded to the pipe. Butt-weld flanges are not easy to deform, have good sealing performance, and are relatively moderate in price. They are widely used in various high-pressure and high-temperature pipelines.
1. Different use environments
Stainless steel flanges are widely used for connecting carbon steel pipelines with a pressure of less than 2.5MPa. The sealing surface of stainless steel flanges can be smooth, concave and convex, and tongue-and-groove. Among them, smooth flanges are the most widely used, mostly in some cases where the medium conditions are relatively mild, such as low-pressure circulating water pipelines.
Stainless steel butt-weld flanges are suitable for pipelines with high pressure and high temperature or high-pressure and low-temperature pipelines. They are also used to transport some relatively expensive, flammable, and explosive media. Because the sealing of the butt-welded flange is particularly good, it is not easy to deform, and can withstand greater pressure, and the pressure range is within 16MPa.
2. Different welding methods
Stainless steel flanges only need to be welded on one side, and do not need to weld the inner port of the pipe and flange connection. Stainless steel welding flanges need to be welded on both sides, so the butt-welded flange reduces the phenomenon of stress concentration.
3. Different prices
The manufacturing technology of stainless steel flanges is relatively simple, and the quotation is cheaper than stainless steel butt-welded flanges.
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