The difference between flat welding flange and butt welding flange

The butt welding flange is that the pipe diameter and wall thickness of the interface end are the same as the pipes to be welded, and are welded like two pipes.
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The butt welding flange is that the pipe diameter and wall thickness of the interface end are the same as the pipes to be welded, and are welded like two pipes.

The flat welding flange is a concave table with a slightly larger inner hole than the outer diameter of the pipe, and the pipe is inserted and welded in it.

Flat welding and butt welding refer to the welding methods when flanges and pipes are connected;

1. When welding flat welding flanges, only one side welding is required, and there is no need to weld the inner port of the pipe and flange connection. The welding installation of butt welding flanges requires double-sided welding of the flanges. Therefore, flat welding flanges are generally used for low and medium pressure pipelines.

2. Butt welding flanges are used for the connection of medium and high pressure pipelines. The butt welding flanges are generally at least PN2.5MPa. The butt welding is used to reduce application concentration. Generally, butt welding flanges are mostly neck flanges, also called neck flanges. Nipple flange. Therefore, the installation cost, labor cost and auxiliary material cost of the butt welding flange are high, because there is one more process.

3. Not all butt welding flanges need to be welded on both sides. There are no special requirements. Generally, only one outer welding is required. Flat welding flanges are a better type of welding, because the pipes and flanges are perpendicular to each other. Don’t lean. 4. Butt-welding flange and flat-welding flange are the two most commonly used flanges: butt-welding flange is with neck, while flat-welding flange is not. If for safety reasons it is best to use butt welding. If the usual medium, the pressure is not high, leakage will not cause danger can be considered with flat welding flange.

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