规定了在用锅炉、压力容器、管道、安全设备和相关控制装置的检查、维修和改造的最低要求，并对此类活动的执行提供了指导。这些检查包括安装后和调试前的初始检查。还提供了相关信息，以便于相关方就压力设备的适当检查间隔和程序达成一致。

Specifies minimum requirements for the inspection, repair and alteration of in-service boilers, pressure vessels, piping, safety equipment and associated controls, and gives guidance on the execution of such activities. These inspections include the initial inspection after installation and prior to commissioning. Information is also given to facilitate grounds for agreement between the interested parties in establishing appropriate inspection intervals and procedures for pressure equipment.