ISO 2284:2017 平行およびテーパーパイプスレッド用のハンドタップ—一般的な寸法とマーキング | ページ 2

Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, 2 (see www.iso.org/directives ).

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This document was prepared by Technical Committee ISO/TC 29, Small tools, Subcommittee SC 9, Tools with defined cutting edges, cutting items.

This fourth edition cancels and replaces the third edition (ISO 2284:1987), of which it constitutes a minor revision with the following changes:

• added Annex B giving the relationship between the symbols of this document and the symbols according to the ISO 13399 series.

1 Scope

This document specifies the general dimensions and marking of hand taps for pipe threads.

It is applicable to the two following types of tap:

• taps for parallel threads (see Figure 1 and Table 1),
• taps for taper threads (see Figure 2 and Table 2),

having threads in accordance with ISO 7-1 and ISO 228-1.

Furthermore, it gives in Annex A the bases used for calculation of the dimensions, and in Annex B the relationship between designations in this document and the ISO 13399 series.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

3 Terms and definitions

No terms and definitions are listed in this document.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

Bibliography