标准摘要
[中文适用范围]： ISO 228 的本部分规定了紧固管螺纹（螺纹尺寸 1/16 至 6（含））的螺纹形状、尺寸、公差和名称的要求。 内螺纹和外螺纹都是平行螺纹，用于管件、旋塞和阀门、附件等部件的机械装配。 这些螺纹不适合作为在螺纹上进行压力密封连接的连接螺纹。 如果具有这种螺纹的组件必须是压力密封的，则应通过压缩螺纹外部的两个紧固表面并插入适当的密封件来实现。 注 1：对于螺纹上有压力密封接头的管螺纹，参见 ISO 7-1。 注 2：ISO 228-2 详细介绍了紧固螺纹尺寸和形状的验证方法以及推荐的计量系统。 [外文原描述]： This part of ISO 228 specifies the requirements for thread form, dimensions, tolerances and designation for fastening pipe threads, thread sizes 1/16 to 6 inclusive. Both internal and external threads are parallel threads, intended for the mechanical assembly of the component parts of fittings, cocks and valves, accessories, etc. These threads are not suitable as jointing threads where a pressure-tight joint is made on the thread. If assemblies with such threads must be made pressure-tight, this should be effected by compressing two tightening surfaces outside the threads, and by interposing an appropriate seal. NOTE 1 For pipe threads where pressure-tight joints are made on the threads, see ISO 7-1. NOTE 2 ISO 228-2 gives details of methods for verification of fastening thread dimensions and form, and recommended gauging systems.
英文名称Pipe threads where pressure-tight joints are not made on the threads — Part 1: Dimensions, tolerances and designation