一、概述由于锅炉是直接受火的承压设备,而压力容器是非直接受火的承压设备,故两者在制造、检验过程中适用的标准不同,因此锅炉与压力容器筒体、封头在尺寸形状公差的规定不尽相同,对于即有制造锅炉,又有制造压力容器的生产单位更容易用错标准,为了防止锅炉、压力容器在制造、 First, an overview Because the boiler is a direct pressure by the fire equipment, and pressure vessels are not directly affected by the pressure of fire equipment, so the two in the manufacturing and testing process for the application of different standards, so the boiler and pressure vessel barrel, head Tolerance in the size and shape of the provisions of different, that is, there is a manufacturing boiler, there are more manufacturing units pressure vessel more likely to use the wrong standard, in order to prevent the boiler, pressure vessel in the manufacture,