1、BS EN1708-1:2010ICS 25.160.40NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDWelding Basicwelded joint details insteelPart 1: Pressurized componentsThis British Standardwas published under theauthority of the StandardsPolicy and StrategyCommittee on 31 January20
2、10 BSI 2010ISBN 978 0 580 55503 9Amendments/corrigenda issued since publicationDate CommentsBS EN 1708-1:2010National forewordThis British Standard is the UK implementation of EN 1708-1:2010. Itsupersedes BS EN 1708-1:1999 which is withdrawn.The UK participation in its preparation was entrusted to T
3、echnicalCommittee WEE/-/1, Briefing committee for welding.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisionsof a contract. Users are responsible for its correct application.Complia
4、nce with a British Standard cannot confer immunityfrom legal obligations.BS EN 1708-1:2010EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1708-1 January 2010 ICS 25.160.40 Supersedes EN 1708-1:1999English Version Welding - Basic welded joint details in steel - Part 1: Pressurized components Sou
5、dage - Descriptif de base des assemblages souds en acier - Partie 1: Composants soumis la pression Schweien - Verbindungselemente beim Schweien von Stahl - Teil 1: Druckbeanspruchte Bauteile This European Standard was approved by CEN on 28 November 2009. CEN members are bound to comply with the CEN/
6、CENELEC 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 CEN Management Centre or to
7、 any CEN 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 CEN Management Centre has the same status as the official versio
8、ns. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slov
9、enia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN n
10、ational Members. Ref. No. EN 1708-1:2010: EBS EN 1708-1:2010EN 1708-1:2010 (E) 2 Contents Page Foreword 31 Scope 42 Normative references 43 Requirements .43.1 Selection of detail 43.2 Joint preparation (geometry and size).53.2.1 General 53.2.2 Joint preparation geometry 53.2.3 Weld sizes .53.3 Prese
11、ntation .53.4 Removal of internal sharp edges in branch bores .53.5 Preparation of holes in shell for set-through branches.63.6 Welds for smooth transition .63.7 Oblique and tangential branches .6Tables Table 1 Butt joints of different thickness . 7Table 2 Branches without compensation rings . 11Tab
12、le 3 Branches with compensation rings . 23Table 4 Sockets and couplings 25Table 5 Flanges . 27Table 6 Jacketed vessels . 31Table 7 Tube to tube plate connection 42Table 8 Flate end or tube plate to shell connections 46Table 9 Internal diaphragms and separators . 53Table 10 Supports and non-pressure
13、parts 54Table 11 Special shell to head end connections . 61Table 12 Weld ring seal 62Table 13 Pipe details . 64Table 14 Block flanges . 70BS EN 1708-1:2010EN 1708-1:2010 (E) 3 Foreword This document (EN 1708-1:2010) has been prepared by Technical Committee CEN/TC 121 “Welding”, the secretariat of wh
14、ich is held by DIN. 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 July 2010, and conflicting national standards shall be withdrawn at the latest by July 2010. Attention is drawn to the possibili
15、ty that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 1708-1:1999. EN 1708, Welding Basic weld joint details in steel, consists of the following pa
16、rts: Part 1: Pressurized components Part 2: Non internal pressurized components According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republi
17、c, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 1708-1:2010EN 1708-1:2010 (E) 4 1 Scope The purp
18、ose of this European 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 development in any way. Stress analysis rules should be considered if necessary. This standard
19、contains examples of connections welded by: Manual metal-arc welding with covered electrode (111); Submerged arc welding (12); Gas shielded metal arc welding (13); Tungsten inert gas arc welding; TIG-welding (14); Plasma arc welding (15) processes (process numbers according to EN ISO 4063) in steel
20、pressure systems. Other processes by agreement. This standard covers welded joint details in steel, but can be applied to other metallic materials. In such cases the shape and dimensions of the weld should be checked. The estimation of the suitability of welded connections for special service condit
21、ions, for example corrosion and fatigue are not specially considered. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced d
22、ocument (including any amendments) applies. EN ISO 4063, Welding and allied processes Nomenclature of processes and reference numbers (ISO 4063:2009) EN ISO 5817, Welding Fusion-welded joints in steel, nickel, titanium and their alloys (beam welding excluded) Quality levels for imperfections (ISO 58
23、17:2003, corrected version:2005, including Technical Corrigendum 1:2006) EN ISO 9692-1:2003, Welding and allied processes Recommendations for joint preparation Part 1: Manual metal-arc welding, gas-shielded metal-arc welding, gas welding, TIG welding and beam welding of steels (ISO 9692-1:2003) EN I
24、SO 9692-2:1998, Welding and allied processes Joint preparation Part 2: Submerged arc welding of steels (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 the
25、ir relative characteristics. In selecting the appropriate detail to use from the several BS EN 1708-1:2010EN 1708-1:2010 (E) 5 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
26、 size) 3.2.1 General The limitations quoted in weld profiles and sizes are based on commonly accepted practice, but they may 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 spe
27、cifications (WPS). 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 ISO 9692-1 when applicable and to EN ISO 9692-2 relative to submerged arc welding process. Missing dimens
28、ions of preparations are in accordance with EN ISO 9692-1. In case 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 penetration. For
29、 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 shall be taken into account, as well as the shape of the joint) of parts to be butt welded, the thickest element shall be shap
30、ed with a slope of 1:5 up to 1:2. Smoother transition of wall thickness is 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
31、 than the connected parts. 3.3 Presentation Figure 1 Transversal section Figure 2 Longitudinal section The drawings of the nozzle and branch connections (see Tables 2 and 3) show a transversal section of the connection (see Figure 1) and a longitudinal section of the connection (see Figure 2). 3.4 R
32、emoval of internal sharp edges in branch bores It will be noted that 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. The rounding of the edges is recommended when the branch connection
33、is subjected to severe service conditions like fatigue, creep and stress corrosion. BS EN 1708-1:2010EN 1708-1:2010 (E) 6 3.5 Preparation of holes in shell for set-through branches In case 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 an
34、d profiled in two ways as follows: The depth of the grooves h1and h2may be constant around the hole as shown in Figure 3. Key h1, h2depth of the grooves Figure 3 Preparation of holes in the shell The roots of the joint preparations may be in one plane, as for example when they are machine drilled, i
35、n which case the depths of the grooves will vary around the hole as shown in Figure 4. Figure 4 Preparation of holes in the shell 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 part to the s
36、urface of the other one, 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 Tables 1 to 13. Regarding br
37、anches, the oblique and tangential ones are not specially considered as their preparation is similar to that reported on Tables 2 and 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 following tables when t
38、he 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. BS EN 1708-1:2010EN 1708-1:2010 (E) 7 Table 1 But
39、t joints of different thickness no. Figure Application/ condition Note Reference to EN ISO 9692-1:2003 and EN ISO 9692-2:1998 1.1 Butt joints in plates of different thickness 1.1.1 30 t13 t1, but min. 20 mm for radiographic test h t11.5, 2.3 and 2.5.2 1.1.4 30 see 1.1.1 2.5.1 BS EN 1708-1:2010EN 170
40、8-1:2010 (E) 8 Table 1 (continued) no. Figure Application/ condition Note Reference to EN ISO 9692-1:2003 and EN ISO 9692-2:1998 1.1.5 30 2.5.11.1.6 30 for ultrasonic test h 3 t1, but min. 20 mm for radiographic test h t12.5.1 BS EN 1708-1:2010EN 1708-1:2010 (E) 9 Table 1 (continued) no. Figure Appl
41、ication/ condition Note Reference to EN ISO 9692-1:2003 and EN ISO 9692-2:1998 1.1.7 longitudinal weld: h1 0,15 t1; maximum 3 mm h2 0,3 t1; maximum 6 mm t2- t1 0,3 t1; maximum 6 mm circumferential weld: h1 0,2 t1; maximum 5 mm h2 0,4 t1; maximum 10 mm t2- t1 0,4 t1; maximum 10 mm BS EN 1708-1:2010EN
42、 1708-1:2010 (E) 10 Table 1 (continued) no. Figure Application/ condition Note Reference to EN ISO 9692-1:2003 and EN ISO 9692-2:1998 1.1.8 Fully penetrated or sealing run BS EN 1708-1:2010EN 1708-1:2010 (E) 11 Table 2 Branches without compensation rings no. Figure Application/ condition Note Refere
43、nce to EN ISO 9692-1:2003 and EN ISO 9692-2:1998 These connections include the provision of compensation by thickening of the branch and/or shell. 2.1 Set-on branches (for special branch connections see 13.2) If the shell is stressed in direction of the thickness, it should be examined for laminatio
44、ns before setting on the branch. 2.1.1 t10,7 t3t3 t2a = 0,7 t3 2 mm b1 4 mm b2 7 mm 20 z 0,3 t3BS EN 1708-1:2010EN 1708-1:2010 (E) 25 Table 4 Sockets and couplings no. Figure Application/ condition Note Reference to EN ISO 9692-1:2003 and EN ISO 9692-2:1998 4.1 Sockets and couplings 4.1.1 m = 1,5 mm
45、 Small couplings in 4.1.1 to 4.1.3 inclusive may be attached to shells by the connections and (with the exception of 4.1.3) by any other appropriate joint shown in Figures 2.3.1 to 2.5.1. Applications especially for attachments, e.g. temperature and pressure sensors. Not suitable when crevice corros
46、ion is expected. 3.1.1 and 4.1.3 4.1.2 see 4.1.1 4.1.3 4.1.3 m = 1,5 mm see 4.1.1 Not suitable when crevice corrosion is expected. 3.1.2 and 1.9.1 BS EN 1708-1:2010EN 1708-1:2010 (E) 26 Table 4 (continued) no. Figure Application/ condition Note Reference to EN ISO 9692-1:2003 and EN ISO 9692-2:1998
47、4.1.4 m = 1,5 mm Applications especially for attachments, e.g. temperature and pressure sensors. Not suitable when crevice corrosion is expected. BS EN 1708-1:2010EN 1708-1:2010 (E) 27 Table 5 Flanges no. Figure Application/ condition Note Reference to EN ISO 9692-1:2003 and EN ISO 9692-2:1998 Due t
48、o distortion it may be necessary to machine the flange-face after welding. The clearance between the bore of the flange and the inner diameter of the branch shall not exceed 2 mm. In the case of thick set-on flanges a radial vent hole through the flange may be useful. 5.1 Flanges (t is the tube thic
49、kness) 5.1.1 After machining flange to final thickness. h1 0,7 t h2 0,7 t Face and back welded flange. For partial penetration welded connection. 1.11 and 2.11 5.1.2 1 conventional butt weld Welding neck flange. Refer to Table 1 from 1.1.1 to 1.1.3 1.5 or 1.3 BS EN 1708-1:2010EN 1708-1:2010 (E) 28 Table 5 (continued) no. Figure Application/ condition Note Reference to EN ISO 9692-1:2003 and EN ISO 9692
