【正文】 wide for CEN national Members. Ref. No. EN 7363:1999 + A1:2020 E Reproduced by IHS under license with BSI Uncontrolled Copy 05:35:15 MST Questions or ments about this message: please call the Document Policy Group at 3033972295. 2 169。 BSI 24 O `,``,`,`,`,`,`,``,``,`,`,`,` EN 7363:1999 Foreword This European Standard has been prepared by Technical Committee CEN/TC 69, Industrial valves, the Secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by November 1999, and conflicting national standards shall be withdrawn at the latest by November 1999. This European Standard has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association. This European Standard is considered to be a supporting standard to those applications and product standards which in themselves support an essential safety requirement of a New Approach Directive and which make reference to this European Standard. According to the CEN/CENELEC Internal Regulations, the national standards anizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Foreword to amendment A1 This amendment EN 7363:1999/A1:2020 to the EN 7363:1999 has been prepared by Technical Committee CEN/TC 69, Industrial valves, the Secretariat of which is held by AFNOR. This amendment to the European Standard EN 7363:1999 shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by March 2020, and conflicting national standards shall be withdrawn at the latest by March 2020. This European Standard has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association. This European Standard is considered to be a supporting standard to those application and product standards which in themselves support an essential safety requirement of a New Approach Directive and which make reference to this European Standard. According to the CEN/CENELEC Internal Regulations, the national standards anizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Contents Foreword 2 Introduction 3 1 Scope 3 2 Normative references 3 3 Definitions 3 Terms relating to pressure and temperature 3 Terms relating to dimensions 4 Terms relating to design 5 Terms relating to flow characteristics 6 Terms relating to operation 6 Terms relating to tests 7 Annex A (informative) Glossary 8 Copyright British Standards Institution Document provided by IHS Licensee=Bureau Veritas/5959906001, 11/08/2020ctober 2020 Reproduced by IHS under license with BSI Uncontrolled Copy 05:35:15 MST Questions or ments about this message: please call the Document Policy Group at 3033972295. 169。 BS `,``,`,`,`,`,`,``,``,`,`,`,` 3 EN 7363:1999 Introduction Part 3 is the first step in harmonizing the definitions of terms for valves. Part 1 deals with the definitions of types of valves and part 2 with definitions of ponents. It is possible that other terms and their definitions will be found in other European Standards. Experts writing European Standards are asked to use the terms an d definitions given in this standard. If other terms and definitions are necessary or are published in other European Standards, please inform the Secretariat of CEN/TC 69 so that the terms an d definitions in these European Standards can be included or harmonized. 1 Scope This standard defines the terms and their definitions (or the source if defined in other standards) necessary for describing pressure and temperature, dimensions, design, flow characteristics, operation and tests for valves. It aims to provide a uniform terminology for all types of valves. The terms and definitions in this standard may also apply to products other than valves, in which case it may be necessary to apply these definitions analogously. This standard covers terms mon to more than one type of valve. The terms and definitions specific to one type of valve are found in the relevant product standard. 2 Normative references This European Standard incorporates, by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN 5581, Industrial valves — Facetoface and centretofac e dimensions of m