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How to weld flat welding flange with neck

2021-08-09 15:42:42   COMMENT:0 HITS:
Butt welding flange is that the pipe diameter and wall thickness of the interface end are the same as those of the pipe to be welded, so it is welded together with two pipes. The flat welding flange is a concave platform whose inner hole is slightly larger than the outer diameter of the pipe, and the pipe is inserted for welding.
Flat welding and butt welding refer to the welding method of flange and pipeline connection. When flat welding flange is welded, only one side welding is required, and the inner opening of pipeline and flange connection does not need to be welded. The welding and installation of butt welding flange requires double-sided welding of flange. Therefore, flat welding flanges are generally used for low and medium pressure pipelines, and butt welding flanges are used for the connection of medium and high pressure pipelines. Butt welding flanges are generally at least PN2.5MPa. Butt welding is used to reduce stress concentration. Generally, butt welding flanges are mostly necked flanges, also known as high neck flanges. Therefore, the installation cost, labor cost and auxiliary material cost of butt welding flange are higher because there is one more process.

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