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1、BRITISH STANDARD BS EN 1708-1:1999 Incorporating Amendment No. 1 Welding Basic weld joint details in steel Part 1: Pressurized components The European Standard EN 1708-1:1999, with the incorporation of amendment A1:2003, has the status of a British Standard ICS 25.160.40 ? Licensed Copy: sheffieldun
2、 sheffieldun, na, Sun Oct 29 10:11:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 1708-1:1999 This British Standard, having been prepared under the direction of the Engineering Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 September 1
3、999 BSI 8 June 2004 ISBN 0 580 30899 5 National foreword This British Standard is the official English language version of EN 1708-1:1999, including amendment A1:2003. The UK participation in its preparation was entrusted to Technical Committee WEE/-/1, Briefing committee for welding, which has the
4、responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitle
5、d “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance w
6、ith a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related intern
7、ational and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 60, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was
8、 last issued. Amendments issued since publication Amd. No. DateComments 149528 June 2004Modification to EN foreword and deletion of Annex ZA Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 10:11:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN
9、 1708-1 March 1999 + A1 November 2003 ICS 25.160.40 English version Welding Basic weld joint details in steel Part 1: Pressurized components (includes amendment A1:2003) Soudage Descriptif de base des assemblages souds en acier Partie 1: Composants soumis la pression (inclut lamendement A1:2003) Sch
10、weien Verbindungselemente beim Schweien von Stahl Teil 1: Druckbeanspruchte Bauteile (enthlt nderung A1:2003) This European Standard was approved by CEN on 30 October 1998. Amendment A1 was approved by CEN on 20 November:2003. CEN members are bound to comply with the CEN/CENELEC Internal Regulations
11、 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 member. This European
12、 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 members are the national
13、 standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de N
14、ormalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1999 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national members. Ref. No. EN 1708-1:1999 + A1:2003 E Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29
15、 10:11:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 1708-1:1999 BSI 8 June 2004 2 Foreword This European Standard has been prepared by Technical Committee CEN/TC 121, Welding, the Secretariat of which is held by DS. This European Standard shall be given the status of a national standard, either
16、by publication of an identical text or by endorsement, at the latest by September 1999, and conflicting national standards shall be withdrawn at the latest by September 1999. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Associati
17、on. According to the CEN/CENELEC Internal Regulations, the national standards organizations 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,
18、 Portugal, Spain, Sweden, Switzerland and the United Kingdom. This European Standard is composed of the two following parts: Part 1: Pressurized components; Part 2: Non-internal pressurized components. Foreword to amendment A1:2003 This document EN 1708-1:1999/A1:2003 has been prepared by Technical
19、Committee CEN/TC 121, Welding, the Secretariat of which is held by DS. This Amendment to the European Standard EN 1708-1:1999 shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by June 2004, and conflicting national standards
20、 shall be withdrawn at the latest by June 2004. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are boun
21、d to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and the United Kingdom. Contents Page Foreword 1Scope3 2Normati
22、ve references3 3Requirements3 3.1Selection of detail3 3.2Joint preparation (geometry and size)3 3.3Presentation4 3.4Removal of internal sharp edges in branch bores4 3.5Preparation of holes in shell for set-in and set-through branches5 3.6Welds for smooth transition5 3.7Oblique and tangential branche
23、s5 Annex ZA (informative) (Text deleted)60 Table 1 Butt joints in plates of different thickness6 Table 2 Branches without compensation rings8 Table 3 Branches with compensation rings18 Table 4 Sockets and couplings20 Table 5 Flanges21 Table 6 Jacketed vessels26 Table 7 Tube to tube plate connection3
24、6 Table 8 Flat end or tube plate to shell connections40 Table 9 Internal diaphragms and separators45 Table 10 Supports and non-pressure parts46 Table 11 Special shell to head end connections52 Table 12 Weld ring seal53 Table 13 Pipe details55 Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 10
25、:11:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 1708-1:1999 BSI 8 June 2004 3 1 Scope The purpose of this standard is to exemplify commonly accepted welded connections in pressure systems. It does not promote the standardization of connections that may be regarded as mandatory or restrict devel
26、opment in any way. Stress analysis rules are to be considered if necessary. This standard contains examples of connections welded by: metal-arc welding with covered electrode (111); submerged arc welding with wire electrode (121); metal-arc inert gas welding: MIG-welding (131); metal-arc active gas
27、welding: MAG-welding (135); flux-cored wire metal-arc welding with active gas shield (136); flux-cored wire metal-arc welding with inert gas shield (137); tungsten inert gas arc welding: TIG-welding (141) processes (process numbers according to EN 24063) in steel pressure systems. Other processes by
28、 agreement. The estimation of the suitability of welded connections for special service conditions, for example corrosion, creep, low temperature and fatigue are not specially considered. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other
29、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 revision of any of these publications apply to this European Standard only when incorporated in it by amendment or rev
30、ision. For undated references the latest edition of the publication referred to applies. EN 24063, Welding, brazing, soldering and braze welding of metals Nomenclature of processes and reference numbers for symbolic representation on drawings. (ISO 4063:1990) EN 25817, Arc-welded joints in steels Gu
31、idance on quality levels for imperfections. (ISO 5817:1992) EN 29692, Metal-arc welding with covered electrode, gas shielded metal-arc welding and gas welding Suggested joint preparations for steel. (ISO 9692:1992) EN ISO 9692-2, Welding and allied processes Joint preparation Part 2: Submerged arc w
32、elding of steel. (ISO 9692-2:1998) 3 Requirements 3.1 Selection of detail Connections are not considered to be equally suitable for all service conditions, nor is the order in which they are shown indicative of their relative characteristics. In selecting the appropriate detail to use from the sever
33、al alternatives shown for each type of connection, consideration shall be given to existing fabrication and service conditions that pertain. 3.2 Joint preparation (geometry and size) 3.2.1 General The limitations quoted in weld profiles and sizes are based on commonly accepted practice, but they may
34、 be subjected to modifications if required by special welding techniques or design conditions, which should be included in the design documents and in the welding procedure specifications (WPS). Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 10:11:39 GMT+00:00 2006, Uncontrolled Copy, (c) BS
35、I EN 1708-1:1999 4 BSI 8 June 2004 3.2.2 Joint preparation geometry Examples of recommended joint preparation geometry (e.g. bevel angles, root radius, presence of backing strips, root faces) are referred to EN 29692 when applicable and to EN ISO 9692-2 relative to submerged arc welding process. Mis
36、sing dimensions of preparations are in accordance with EN 29692. In cases where full penetration butt joints are indicated, it is intended that they shall be back chipped or gouged and back welded, or alternatively that the welding procedure shall be such as to ensure sound, effective root penetrati
37、on. For relevant difference of thickness generally a difference of about 3 mm (see Table 1, no. 1.1.1 to 1.1.6) could be considered relevant; in any case the thickness of material has to be taken into account, as well as the shape of the joint of parts to be butt welded, the thickest element shall b
38、e shaped with a slope of 1:5 up to 1:2. The smaller values are applicable in severe service conditions. 3.2.3 Weld sizes The thickness of welds (in particular of fillet welds), which are not determined by their profile, are based on the assumption that the connection need not be stronger than the co
39、nnected parts. 3.3 Presentation The drawings of the nozzle and branch connections (see Table 2 and Table 3) show a transversal section of the connection (see Figure 1) and a longitudinal section of the connection (see Figure 2). 3.4 Removal of internal sharp edges in branch bores It will be noted th
40、at the internal edges on the bores of branches are shown partially radiused (for example see Table 2, no. 2.1.6) because a stress concentration occurs at this point. This precaution (grinding away the sharp edge) is recommended when the branch connection is subjected to severe service conditions lik
41、e fatigue, creep, and stress corrosion. Figure 1 Transversal section Figure 2 Longitudinal section Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 10:11:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 1708-1:1999 BSI 8 June 2004 5 3.5 Preparation of holes in shell for set-in and set-through
42、branches In cases of set-in and set-through branches (according to Table 2, no. 2.2 and no. 2.3) holes in the shell may be cut and profiled in two ways as follows. The depth of the grooves h1 and h2 may be constant around the hole as shown in Figure 3. The roots of the joint preparations may be in o
43、ne plane, as for example when they are machine drilled, in which case the depths of the grooves will vary around the hole as shown in Figure 4. 3.6 Welds for smooth transition In some cases it is convenient to foresee a fillet weld providing smooth geometric transition from the surface of one welded
44、 part to the surface of the other, e.g. from branch to shell. Its purpose is to soften the notch effect in the branch-shell edge and therefore the throat thickness is not presented on the figure concerned. 3.7 Oblique and tangential branches The welded connections are contained in Table 1 to Table 1
45、3. Regarding branches, the oblique and tangential ones are not specially considered as their preparation is similar to that reported in Table 2 and Table 3 for radial branches. Only some significant cases are therefore considered (see Table 2, no. 2.2). NOTE 1 The welds are only blackened in the fol
46、lowing tables when the figures do not give information about the dimension of the values for the preparation. NOTE 2 It is not intended that the values of the dimension given in the tables should be measured precisely but rather the general philosophy should be applied. Figure 3 Preparation of holes
47、 in the shell Figure 4 Preparation of holes in the shell Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 10:11:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 1708-1:1999 6 BSI 8 June 2004 Table 1 Butt joints in plates of different thickness No. Figure Application/conditionNote Reference to
48、EN 29692 and EN ISO 9692-2 1.1 Butt joints in plates of different thickness 1.1.1 k 30 t1 2 mm For use on pressure vessels, when there is no risk of corrosion. 6.4.9 1) conventional butt weld 2.3.3 or 2.7.9 and 1.5 ? ? ? ? ? bn ? ? ? ? ? ? ? ? ? ? ? 1) 1) Licensed Copy: sheffieldun sheffieldun, na,
49、Sun Oct 29 10:11:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 1708-1:1999 34 BSI 8 June 2004 Table 6 Jacketed vessels (continued) No. Figure Application/condition Note Reference to EN 29692 and EN ISO 9692-2 6.5 Alternatives to full jackets Preformed elements welded to shell. Make weld preparation as necessary for access. 6.5.1 1) shell = 45 1.4 6.5.2 1 = 45 2 = 60 b =