压力容器封头最小成形厚度标注探讨

Discussion Dimensioning of Minimum Required Fabrication Thickness of the Formed Head of Pressure Vessel

封头是压力容器中的主要承压零部件之一,其质量好坏对压力容器的安全运行起着重要作用。厚度是封头最主要的结构参数,是在规定的载荷条件下,保证结构强度、刚度以及使用寿命的基本条件之一。针对GB 150.1～GB 150.4—2011《压力容器》中关于封头最小成形厚度的规定进行了探讨,分析了几种不同情况下设计图样中封头最小厚度的标注方法,并通过举例对封头最小成形厚度标注方法进行了讨论。

The head is one of the main pressure parts of pressure vessel and its quality plays a vital role on the safe operation of pressure vessel. Thickness is the main structure parameters of the head, it guarantees the structure strength and the structure stiffness and the service life under prescribed loading conditions. The minimum required fabrication thickness of the head specified by GB 150. 1-GB 150.4--2011 ＂Pressure Vessels＂ discussed and several different cases to mark the minimum thickness of the head is analyzed. Marked method of the minimum required fabrication thickness of the head is discussed through the example.