ISO 9854-1:1994 流体輸送用の熱可塑性プラスチックパイプ—シャルピー法による振り子衝撃強度の決定—パート1：一般的な試験方法 | 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.

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.

International Standard ISO 9854-1 was prepared by Technical Committee ISO/TC 138, Plastics pipes, fittings and valves for the transport of fluids, Subcommittee SC 5, General properties of pipes, fittings and valves of plastic materials and their accessories — Test methods and basic specifications.

ISO 9854 consists of the following parts, under the general title Thermoplastics pipes for the transport of fluids — Determination of pendulum impact strength by the Charpy method:

• Part 1: General test method
• Part 2: Test conditions for pipes of various materials

Annex A of this part of ISO 9854 is for information only.

1 Scope

This part of ISO 9854 specifies the general test method to be used for the determination of the impact strength of unnotched test pieces cut from thermosplastics pipes for the transport of fluids.

It is not intended to be a reference test method for the determination of the impact strength of pipes.

ISO 3127, relating to the determination of the impact strength of pipes by means of a falling mass, is the reference method.

However, this part of ISO 9854 may be used for scientific research, materials testing or the examination of pipes when it is not possible to take measurements in accordance with the reference method.

This part of ISO 9854 may be applied to either isolated batches or continuous production of pipe, and the test may be carried out at − 20 °C, 0 °C or 23 °C, depending on the pipe material and/or size.

For the test parameters, i.e. impact energy, test piece dimensions, shape and spacing of the test piece supports and type of test piece, to be used to determine the pendulum impact strength of pipes, the specifications for specific materials are given in ISO 9854-2, as appropriate.

2 Normative references

The following standards contain provisions which, through reference in this text, constitute provisions of this part of ISO 9854. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this part of ISO 9854 are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards.

Annex A

Bibliography