《BS-EN-629-1-1996.pdf》由会员分享，可在线阅读，更多相关《BS-EN-629-1-1996.pdf（12页珍藏版）》请在三一文库上搜索。
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 Licensed Copy: sheffieldun sheffieldu
3、n, na, Thu Nov 09 08:13:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI This British Standard, having been prepared 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 referen
4、ces relate to the work on this standard: Committee reverence PVE/3/1 Draft for comment 92/72648 DC ISBN 0 580 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 entrust
5、ed by Technical Committee PVE/3, Gas containers, to Subcommittee PVE/3/1, Gas containers fittings, upon which the following bodies were represented: Aluminium Federation British Compressed Gases Association Health and Ssafety Executive Ministry of Defence Coopted members Licensed Copy: sheffieldun s
6、heffieldun, na, Thu Nov 09 08:13:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 629-1 : 1996 BSI 1996i Contents Page Committees responsibleInside front cover National forewordii Foreword2 Text of EN 629-13 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 08:13:48 GMT+00:00 2006, Uncontrol
7、led Copy, (c) BSI ii 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 t
8、he European Committee 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 conne
9、ction to gas cylinders Part 2 : 1996 Gauge inspection Compliance with a British Standard does not of itself confer immunity from legal obligations. Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 08:13:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI CEN European Committee for Standardization Co
10、mite Europe en de Normalisation Europa isches Komitee fu r Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1996 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 cylinde
11、rs, gas valves, junctions, tapered screw threads, definitions, specifications, dimensions, dimensional tolerances English version Transportable gas cylinders 25E taper thread for connection of valves to gas cylinders Part1: Specification Bouteilles a gaz transportables Filetages coniques 25E pour le
12、 raccordement des robinets sur les bouteilles a gaz Partie 1: Spe cifications Ortsbewegliche Gasflaschen 25E kegeliges Gewinde zum 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
13、 Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without 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
14、member. This European Standard exists in three official versions (English, French, German). A version in any other language made 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 mem
15、bers are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 08:13:48 GMT+00:00 2006, Un
16、controlled Copy, (c) BSI 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 shall be given the status of a national standard, either by public
17、ation 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 standards organizations of the following countries are bound to implemen
18、t 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 1Scope3 2Normative reference3 3Definitions3 4Requirements6 5Threa
19、d end finish6 6Identification6 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 08:13:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 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 ga
20、uge requirements: Part 1: Specification; Part 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
21、 to such accessories. The connection, between 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 definitio
22、ns, dimensions and tolerances of a taper screw 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 ti
23、ghtness; capability of repeated assembly and 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
24、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 629-2Transportable gas cylin
25、ders 25E taper thread for connection of valves 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).
26、3.2 cylinder neck thread Tapered axial hole 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 roo
27、ts of the thread of the valve stem, or the crests of the cylinder neck thread. 3.5 pitch cone Cone passing, coaxially and midway, between the major and minor cones. 3.6 reference plane A Reference plane coincident with the small end face of the threaded valve stem and corresponding to diameters d1i,
28、 d1p, and d1e(see figure 1). 3.7 reference plane B Reference plane, at a distance l1from reference plane A and corresponding to diameter d2p (see figure 1). 3.8 reference plane F Reference plane coincident with the entry section face of the cylinder neck thread and corresponding to diameter D2p(see
29、figure 1). 3.9 reference plane G Reference plane, at a distance L1from reference plane F and corresponding to diameters D1e, D1p, and D1i(see figure 1). 3.10 major diameter d1e Diameter of the major cone, at the valve stem thread reference plane A (before any chamfer is cut) (see figure 1). 3.11 pit
30、ch diameter d1p Diameter of the pitch cone at the valve stem thread reference plane A (before any chamfer is cut) (see figure 1). 3.12 minor diameter d1i Diameter of the minor cone at the valve stem thread reference plane A (before any chamfer is cut) (see figure 1). 3.13 pitch diameter d2p Diameter
31、 of the pitch cone at reference plane B (see figure 1). 3.14 major diameter D1e Diameter of the major cone at reference plane G (see figure 1). 3.15 pitch diameter D1p Diameter of the pitch cone at reference plane G (see figure 1). 3.16 minor diameter D1i Diameter of the minor cone at reference plan
32、e G (see figure 1). Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 08:13:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 4 EN 629-1 : 1996 BSI 1996 Valve stem thread Plane B Plane A Plane F Plane A l1 l2 2 max. L1 L2 Plane F Plane G d d d 1i 1p D2p 1e Cylinder neck thread C D Detail C Det
33、ail D 2 max. Figure 1. Thread reference planes and diameters 3.17 pitch diameter D2p Diameter of the pitch cone at reference plane F (before any chamfer is cut) (see figure 1). 3.18 reference length l1 Reference dimension being the distance between the parallel reference planes A and B (see figure 1
34、). 3.19 reference length L1 Reference dimension being the distance between the parallel reference planes F and G (see figure 1). 3.20 length of external thread l2 Length of full form thread, on the valve stem, measured along the cone axis from the reference plane A (see figure 1 and table 1). 3.21 l
35、ength of internal thread L2 Length of full form thread, in the cylinder neck, measured along the cone axis from the reference plane F (see figure 1 and table 2). 3.22 taper Ratio of the difference of two diameters corresponding to planes, normal to the axis of the reference cone, and the axial dista
36、nce between the same planes. It can be expressed as a ratio, as an angle or as a percentage. 3.23 thread profile Thread shape obtained by the intersection of a plane through the thread axis and the threaded surface. 3.24 basic profile Theoretical profile, when the profile of the external thread coin
37、cides with the profile of the internal thread. 3.25 design profile Design profile differs from the basic profile due to the radius of the root, necessary for manufacturing and strength requirements. Manufacturing tolerances are taken into account, for such a profile. 3.26 pitch P Distance, measured
38、parallel to the cone surface, between two homologous points of two parallel consecutive flanks of the same thread (see figure 2). Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 08:13:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 5 EN 629-1 : 1996 BSI 1996 Pitch p 0,290,291,162 R 0,249 B
39、asic profile Design profile Cylinder neck thread profile 1,742 = 0,025 max.0,025 max. R 0,249 0,025 max. 90 55 90 2 Valve stem thread profile Cone axis = = 0,025 max. Figure 2. Thread profiles Table 1. Valve stem dimensions Dimensions in millimetres Valve stemMajor diameter d1e Pitch diameter d1p Mi
40、nor diameter d1i Pitch diameter d2p Reference length l1 Full threads length l2 Dimension25,6824,51823,35627,63826$ 26 Tolerance 0 +0,12 0 +0,12 0 +0,12 0 +0,12 Table 2. Cylinder neck thread dimensions Dimensions in millimetres Cylinder neck threadMajor diameter D1e Pitch diameter D1p Minor diameter
41、D1i Pitch diameter D2p Reference length L1 Full threads length L2 Dimension25,1623,99822,83626,63822$ 22 Tolerance 20,12 0 20,12 0 20,12 0 20,12 0 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 08:13:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 6 EN 629-1 : 1996 BSI 1996 4 Requirements
42、 4.1 Thread rotation The thread shall be a right hand thread, such that it moves away from an observer when rotated clockwise. 4.2 Taper Taper ratio:3 / 25; Taper angle:6 52; Taper slope:12%. 4.3 Thread profile The thread profile is a standard Whitworth form, with a 55 angle. The form and thread hei
43、ght measurements are perpendicular to the cone surface (see figure 2). 4.4 Pitch P The pitch is 1,814 mm (derived frommm) 25,4 14 (see figure 2). 5 Thread end finish The thread of the valve stem may have a chamfer of 2 mm maximum from plane A at the bottom part and a groove at the top (see figure 1)
44、. The thread of the cylinder neck may have a chamfered opening of 2 mm maximum from plane F (see figure 1). 6 Identification Valves and cylinders, threaded in accordance with this standard, shall be identified by the symbol 25E. Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 08:13:48 GMT+00:
45、00 2006, Uncontrolled Copy, (c) BSI blank Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 08:13:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
46、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in
47、Europe and at the international level. It is incorporated by Royal Charter. Revisions British Standards are updated by amendment or revision. Users of British Standards should make sure that they possess the latest amendments or editions. It is the constant aim of BSI to improve the quality of our p
48、roducts and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical committee responsible, the identity of which can be found on the inside front cover. Tel: 020 8996 9000. Fax: 020 8996 7400. BSI offer
49、s members an individual updating service called PLUS which ensures that subscribers automatically receive the latest editions of standards. Buying standards Orders for all BSI, international and foreign standards publications should be addressed to Customer Services. Tel: 020 8996 9001. Fax: 020 8996 7001. In response to orders for international standards, it is BSI policy to supply the BSI implementation of those that have been published as British Standards, unless otherwise requested. Information on st