The pipe cap is divided into butt welded pipe cap and threaded pipe cap. It is a pipe fitting welded on the pipe end or installed on the external thread of the pipe end to cover the pipe and seal the pipe. The diameter of the official cap is generally within DN300, which is mainly used on the pipe, and plays a reinforcing role as a butt joint with the pipe or as a blanking plate, not as a main pressure element. Pipe cap diameter: dn15-dn800 wall thickness: sch10-sch160 standard: asmeb16.9, GB / t12459-2017, etc;
The use of pipe cap and head is the same. However, the head generally refers to the standard GB / 25198-2010. In the national welding pipe fittings standard GB / t12459-2017, there is no mention of the head. Only the word "pipe cap" appears. Not only in GB / t12459-2017, but also in GB / t13401-2017, it is also marked with pipe cap.
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