描述了当管道规范未提供具体说明时，制造商将在管道组件上提供的最小端部保护类型，并描述了合同文件规定的一些其他端部保护类型

Describes the min. type of end protection the fabricator will provide on piping assemblies when the piping specification does not provide specific instructions & also to describe some of other types of end protection specified by the contractual documents