標準號：ISO 7-2-2000
中文標準名稱：用螺紋密封的管螺紋 第2部分:用*限量規檢驗
英文標準名稱：Pipe threads where pressure-tight joints are made on the threads - Part 2: Verification by means of limit gauges
標準類型：J05
發布日期：1999/12/31 12:00:00
實施日期：1999/12/31 12:00:00
中國標準分類號：J05
國際標準分類號：21.040.30
適用范圍：This part of ISO 7 specifies a process using limit gauges, for the validation of taper internal and external threads and parallel internal threads on piping systems components and other products, the dimensions and tolerances of which are detailed in ISO 7-1.The gauging system described may not be suitable, without special precautions, for gauging of threads on injection moulded plastic workpieces.This part of ISO 7 does not cover completely all the requirements necessary for full control of thread quality and dimensions. Additional control of tools and equipment and visual inspection during production are required to ensure complete compliance with ISO 7-1, for example the length of useful thread on internally threaded workpieces should be checked by direct measurement.Annex A gives a summary of the gauges included in this part of ISO 7, together with details of the thread elements controlled by each gauge and gauge identification numbers.In the event of a dispute over compliance with the requirements of ISO 7-1, the gauges in this part of ISO 7 are to be considered as decisive for the thread elements which they control on the workpiece.