Comprehensive Analysis of the Shape, Size and Weight of Pipe Caps: Key Factors for Selection and Application In industrial piping systems, pipe caps, as key components for sealing the ends of pipes, their precise calculation of external dimensions and weight not only affects the sealing performance of the system but also directly influences the feasibility of installation and maintenance as well as the economic efficiency of operation. Pipe caps are an indispensable component of pipeline systems, mainly used to seal the ends of pipes to prevent the leakage of media and the entry of external contaminants. As the "terminator" of pipeline systems, the selection of pipe caps directly affects the safety, reliability and economy of the entire system. This article will comprehensively analyze the shape, size and weight parameters of pipe caps to help engineering technicians make scientific and reasonable choices. I. Basic Concepts and Classification of Pipe Caps Pipe caps, also known as end caps, are pipe fittings welded to the end of pipes to achieve sealing.