BS EN 629-1-1996 Transportable gas cylinders 25E taper thread for connection of valves to gas cylinders Part 1. Specification.pdf
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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 629-1 : 1996 The Eu
2、ropean Standard EN 629-1 : 1996 has the status of a British Standard ICS 23.020.30 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Transportable gas cylinders 25E taper thread for connection of valves to gas cylinders Part 1. Specification This British Standard, having been pr
3、epared under the direction of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 15 December 1996 BSI 1996 The following BSI references relate to the work on this standard: Committee reverence PVE/3/1 Draft for comment 92/72648 DC ISBN 0 5
4、80 26451 3 BS EN 629-1 : 1996 Amendments issued since publication Amd. No.DateText affected Committees responsible for this British Standard The preparation of this British Standard was entrusted by Technical Committee PVE/3, Gas containers, to Subcommittee PVE/3/1, Gas containers fittings, upon whi
5、ch the following bodies were represented: Aluminium Federation British Compressed Gases Association Health and Ssafety Executive Ministry of Defence Coopted members BS EN 629-1 : 1996 BSI 1996i Contents Page Committees responsibleInside front cover National forewordii Foreword2 Text of EN 629-13 ii
6、BSI 1996 BS EN 629-1 : 1996 National foreword This British Standard has been prepared by Subcommittee PVE/3/1 and is the English language version of EN 629-1 : 1996 Transportable gas cylinders 25E taper thread for connection to gas cylinders Part 1: Specification, published by the European Committee
7、 for Standardization (CEN). EN 629-1 was produced as a result of international discussion in which the United Kingdom took part. Cross-references Publication referred toCorresponding British Standard EN 629-2 : 1996BS EN 629 Transportable gas cylinders 25E taper thread for connection to gas cylinder
8、s Part 2 : 1996 Gauge inspection Compliance with a British Standard does not of itself confer immunity from legal obligations. CEN European Committee for Standardization Comite Europe en de Normalisation Europa isches Komitee fu r Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1996
9、 Copyright reserved to CEN members Ref. No. EN 629-1 : 1996 E EUROPEAN STANDARDEN 629-1 NORME EUROPE ENNE EUROPA ISCHE NORM June 1996 ICS 23.020.30 Descriptors: Gas cylinders, gas valves, junctions, tapered screw threads, definitions, specifications, dimensions, dimensional tolerances English versio
10、n Transportable gas cylinders 25E taper thread for connection of valves to gas cylinders Part1: Specification Bouteilles a gaz transportables Filetages coniques 25E pour le raccordement des robinets sur les bouteilles a gaz Partie 1: Spe cifications Ortsbewegliche Gasflaschen 25E kegeliges Gewinde z
11、um Anschlub von Ventilen an Gasflaschen Teil 1: Spezifikation This European Standard was approved by CEN on 1995-12-06. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without
12、 any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made
13、 by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy,
14、Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Page 2 EN 629-1 : 1996 BSI 1996 Foreword This European Standard has been prepared by Technical Committee CEN/TC 23, Transportable gas cylinders, the secretariat of which is held by BSI. This European Standard s
15、hall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by December 1996, and conflicting national standards shall be withdrawn at the latest by December 1996. According to the CEN/CENELEC Internal Regulations, the national standar
16、ds organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, United Kingdom. Contents Page Foreword Introduction
17、1Scope3 2Normative reference3 3Definitions3 4Requirements6 5Thread end finish6 6Identification6 Page 3 EN 629-1 : 1996 BSI 1996 Introduction This European Standard is a two part standard, belonging to a series of standards specifying thread dimensions and gauge requirements: Part 1: Specification; P
18、art 2: Gauge inspection. Cylinders intended to contain compressed, liquefied or dissolved gas under pressure are fitted with accessories (valves, straight or angle fittings) to allow release of, and refilling with, gas. Hereinafter, the term valve will apply to such accessories. The connection, betw
19、een cylinder and valve, is obtained by assembly of two taper threads, an external one on the valve stem and an internal one in the cylinder neck, both having the same nominal taper, pitch and thread profile. 1 Scope This European Standard specifies definitions, dimensions and tolerances of a taper s
20、crew thread of nominal diameter 25,8 mm (designated 25E), for the connection of valves to medical and industrial gas cylinders. Gauge inspection is covered by EN 629-2. This standard does not cover the connection requirements for: mechanical strength; gas tightness; capability of repeated assembly a
21、nd dismounting operations. 2 Normative reference This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate place in the text and the publications are listed hereafter. For dated references, subsequen
22、t 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 629-2Transportable gas cylinders 25E taper thread for connection of va
23、lves to gas cylinders Part 2: Gauge inspection 3 Definitions For the purposes of this standard, the following definitions apply. 3.1 valve stem Tapered end of the valve body, with a thread formed on the external surface of the truncated cone (see figure 1). 3.2 cylinder neck thread Tapered axial hol
24、e in the cylinder neck, with a thread formed on the internal surface of the truncated cone (see figure 1). 3.3 major cone Cone bounding the crests of the thread of the valve stem, or the roots of the cylinder neck thread. 3.4 minor cone Cone bounding the roots of the thread of the valve stem, or the
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