ISO 4706:2008 ガスボンベ — 詰め替え可能な溶接鋼ボンベ — テスト圧力60バール以下 | 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.

International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, 2.

The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights.

ISO 4706 was prepared by Technical Committee ISO/TC 58, Gas cylinders, Subcommittee SC 3, Cylinder design.

This second edition cancels and replaces the first edition (ISO 4706:1989), which has been technically revised.

ISO 4706 has been prepared to address the general requirements in Chapter 6.2 of the UN model regulations for the transportation of dangerous goods ST/SG/AC.10/1Rev.15. It is intended to be used under a variety of regulatory regimes but has been written so that it is suitable for use with the conformity assessment system in 6.2.2.5 of ST/SG/AC.10/1/Rev.15.

This corrected version incorporates the following corrections:

• following the cancellation of a proposed ISO 4706-2, the reference number has been changed from ISO 4706-1 to ISO 4706, therefore
  • reference to individual parts of ISO 4706 has been removed from the foreword,
  • references to ISO 4706-1 have been replaced by ISO 4706, and
  • the page headers have been changed to read “ISO 4706:2008”;

• the term “proof stress” has been replaced by the term “proof strength”;

• Subclause 7.4, Design of openings, has been moved to Clause 6, Design, and renumbered 6.3;

• the title of Figure 5 now relates to longitudinal welds, not circumferential welds;

• the graphics in Figure 5 have been modified to depict a longitudinal weld.

Introduction

The purpose of this International Standard is to facilitate agreement on the design and manufacture of welded-steel gas cylinders in all countries. The requirements are based on knowledge of, and experience with, materials, design requirements, manufacturing processes and controls in common use for the manufacture of gas cylinders.

With respect to those aspects concerning construction materials, approval of design rules and inspection during manufacture, which are subject to national or international regulations, it is necessary for interested parties to ensure that in the practical application of this International Standard, the requirements of the relevant authority are also satisfied.

1 Scope

This International Standard specifies the minimum requirements concerning material selection, design, construction and workmanship, procedure and test at manufacture of refillable welded-steel gas cylinders of a test pressure not greater than 60 bar ¹⁾ , and of water capacities from 0,5 l up to and including 500 l exposed to extreme worldwide temperatures (−50 °C to +65 °C) used for compressed, liquefied or dissolved gases.

Transportable large cylinders of water capacity above 150 l and up to 500 l may be manufactured and certified to this International Standard provided handling facilities are provided (see 8.6.4).

This International Standard is primarily intended to be used for industrial gases other than Liquefied Petroleum Gas (LPG), but may also be applied for LPG. For specific LPG applications see ISO 22991.

2 Normative references

The following referenced documents are indispensable for the application 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.

Bibliography