壓力容器 (pressure vessel) 

通常是指一個專門設計能承受一定壓力載荷，以盛裝氣體或液體的密閉容器，材質包括金屬及非金屬材料。壓力容器內部和外部的壓力差具有潛在的危險。在壓力容器的發展歷史上，許多安全事故都因為製造、操作和使用不當而發生。因此壓力容器受到嚴格的標準控制。由於這些原因，壓力容器的定義因為每個國家的標準及所涉及的參數不同而有差異，例如最大安全工作壓力和溫度。 

A pressure vessel is a closed container designed to hold gases or liquids at a pressure substantially different from the ambient pressure. The pressure difference between the inside and outside of a pressure vessel poses a potential hazard. In the history of pressure vessel development, many accidents have occurred due to improper manufacturing, operation, and use. Therefore, pressure vessels are subject to strict standard control. Due to these reasons, the definition of pressure vessels varies from country to country depending on the standards and parameters involved, such as the maximum safe working pressure and temperature.

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