1、raising standards worldwide NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BSI British Standards WB9423_BSI_StandardColCov_noK_AW:BSI FRONT COVERS 5/9/08 12:55 Page 1 PD 6705-3:2009 PUBLISHED DOCUMENT Structural use of steel and aluminium Part 3: Recommendations for the execu
2、tion of aluminium structures to BS EN 1090-3 This publication is not to be regarded as a British Standard. PD 6705-3:2009 PUBLISHED DOCUMENT Publishing and copyright information The BSI copyright notice displayed in this document indicates when the document was last issued. BSI 2009 ISBN 978 0 580 6
3、5116 8 ICS 91.080.10 The following BSI reference relates to the work on this standard: Committee reference B/525/9 Publication history First published December 2009 Amendments issued since publication Date Text affected BSI 2009 i PD 6705-3:2009 PUBLISHED DOCUMENTContents Foreword ii 1 Scope 1 2 Nor
4、mative references 1 3 Terms and definitions 2 4 Recommendations for the use of BS EN 1090-3 2 4.1 General 2 4.2 Service category 3 4.3 Execution classes 3 4.4 Specification and documentation 3 4.5 Constituent products 4 4.6 Preparation 5 4.7 Welding 5 4.8 Mechanical fastening and adhesive bonding 7
5、4.9 Corrosion protection 9 4.10 Inspection, testing and corrections 10 Bibliography 21 List of tables Table 1 Maximum diameter of pores 4 Table 2 Bedding torque values for Step 1 of the part-turn method 8 Table 3 Rotation values for Step 2 and Step 3 of the part-turn method 9 Table 4 Minimum extent
6、of supplementary NDT of shop welds in all alloys, except 7*, for EXC2 and quantified service category F20 14 Table 5 Adjustments in proportions of NDT for conditions other than those covered by Table 4 and Table 6 14 Table 6 Minimum extent of supplementary NDT of shop welds in all alloys, except 7*,
7、 for EXC2 and quantified service categories F25 to F63 15 Table 7 Weld acceptance criteria for visual inspection 16 Table 8 Weld acceptance criteria for visual inspection for quantified service categories F25 to F63 where limits different from F20 in Table 7 18 Table 9 Weld acceptance criteria for p
8、enetrant testing 19 Table 10 Weld acceptance criteria for ultrasonic testing with limited optional radiographic testing 20 Summary of pages This document comprises a front cover, an inside front cover, pages i to ii, pages 1 to 22, an inside back cover and a back cover.ii BSI 2009 PD 6705-3:2009 PUB
9、LISHED DOCUMENTForeword Publishing information This part of PD 6705 is published by BSI and came into effect on 31 December 2009. It was prepared by Subcommittee B/525/9, Structural use of aluminium. A list of organizations represented on this committee can be obtained on request to its secretary. R
10、elationship with other publications This Published Document gives guidance on the use of BS EN 1090-3 for the execution of aluminium structures in the UK. Information about this document BS EN 1090-3 will replace BS 8118-2 after a period of coexistence. The replacement of BS 8118-2 will represent a
11、substantial change in design practice in the UK. The purpose of this Published Document is to ensure that aluminium structures will be executed with the same level of assurance of reliability as that implicit in BS 8118-2. The guidance given in this Published Document consists of non-contradictory c
12、omplementary information (NCCI) to enable the user to apply BS EN 1090-3 in a safe and cost-effective manner, with particular reference to the following: a) selection of options where they are defined in BS EN 1090-3; b) alternative information where permitted in BS EN 1090-3. Presentational convent
13、ions The provisions in this Published Document are presented in roman (i.e. upright) type. Its recommendations are expressed in sentences in which the principal auxiliary verb is “should”. Commentary, explanation and general informative material is presented in smaller italic type, and does not cons
14、titute a normative element. Contractual and legal considerations This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a Published Document cannot confer immunity from legal obligations. BSI 2009 1
15、PD 6705-3:2009 PUBLISHED DOCUMENT1 Scope This part of PD 6705 gives guidance on the use of BS EN 1090-3 for the execution of aluminium structures designed to BS EN 1999. It is applicable to the same scope of application as in BS EN 1090-3, unless otherwise stated. The specification information inclu
16、ded in this document is applicable only when the design guidance in PD 6702-1 has been followed.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 e
17、dition of the referenced document (including any amendments) applies. BS EN 1011-4:2000, Welding Recommendations for welding of metallic materials Part 4: Arc welding of aluminium and aluminium alloys BS EN 1011-6, Welding Recommendation for welding of metallic materials Part 6: Laser beam welding B
18、S EN 1011-7, Welding Recommendation for welding of metallic materials Part 7: Electron beam welding BS EN 1090-3:2008, Execution of steel structures and aluminium structures Part 3: Technical requirements for aluminium structures BS EN 1289:1998, Non-destructive testing of welds Penetrant testing of
19、 welds Acceptance levels BS EN 1435:1997+A2:2004, Non-destructive testing of welds Radiographic testing of welded joints BS EN 1714:1998+A2:2004, Non-destructive testing of welds Ultrasonic testing of welded joints BS EN 1999, Eurocode 9: Design of aluminium structures BS EN 1999-1-1:2007, Eurocode
20、9: Design of aluminium structures Part 1-1: General structural rules BS EN 1999-1-3:2007, Eurocode 9: Design of aluminium structures Part 1-3: Structures susceptible to fatigue BS EN 14399-3:2005, High-strength structural bolting assemblies for preloading Part 3: System HR Hexagon bolt and nut assem
21、blies BS EN ISO 6520-1:2007, Welding and allied processes Classification of geometric imperfections in metallic materials Part 1: Fusion welding BS EN ISO 7093-1:2000, Plain washers Large series Part 1: Product grade A BS EN ISO 10042:2005, Welding Arc-welded joints in aluminium and its alloys Quali
22、ty levels for imperfections BS EN ISO 13919-2:2001+A1:2004, Welding Electron and laser beam welded joints Guidance on quality levels for imperfections Part 2: Aluminium and its weldable alloys BS EN ISO 15612, Specification and qualification of welding procedures for metallic materials Qualification
23、 by adoption of a standard welding procedure 2 BSI 2009 PD 6705-3:2009 PUBLISHED DOCUMENT BS EN ISO 15614-11, Specification and qualification of welding procedures for metallic materials Welding procedure test Part 11: Electron and laser beam welding BS EN ISO 25239-3, Friction stir welding Aluminiu
24、m Part 3: Qualification of welding operators 1) BS EN ISO 25239-4, Friction stir welding Aluminium Part 4: Specification and qualification of welding procedures 1)BS EN ISO 25239-5, Friction stir welding Aluminium Part 5: Quality and inspection requirements 1) PD 6702-1, Structural use of aluminium
25、Part 1: Recommendations for the design of aluminium structures to BS EN 19993 Terms and definitions For the purposes of this part of PD 6705, the terms and definitions given in BS EN 1090-3 and PD 6702-1 apply.4 Recommendations for the use of BS EN 1090-34.1 General The recommendations in this part
26、of PD 6705 are based on the National Annexes to BS EN 1999 and the design recommendations in PD 6702-1, which provides non-contradictory complementary information on the design rules in BS EN 1999. Guidance is given in PD 6702-1 on the selection of execution class, which is one of the means of provi
27、ding different levels of reliability of structural performance. This is achieved in BS EN 1090-3 by varying the level of assurance that the quality standards assumed in deriving the BS EN 1999 resistance data have been met in construction. A major factor in the determination of the quality requireme
28、nts is the degree of cyclic loading which the structural components need to resist. BS EN 1999-1-3 does not provide normative fatigue design data and the informative fatigue data in BS EN 1999-1-3:2007, Annex J, have not been accepted by the UK. Alternative fatigue rules are instead given in PD 6702
29、-1. These latter rules are consistent with a set of quality levels, based on fitness for purpose, which are different from those given in BS EN 1999-1-3:2007, Annex J, and BS EN 1090-3. Furthermore, the quality levels assumed in PD 6702-1 are based on specific methods and extents of inspection unlik
30、e those given in the European Standards. The quality levels and extents of inspection in BS EN 1090-3 are differentiated on the basis of two service categories depending on whether the structure/component is classified as “predominantly static” or “significant fatigue”. There is no further definitio
31、n in BS EN 1090-3 as to how these two conditions are to be differentiated in a quantitative way. 1)In preparation. BSI 2009 3 PD 6705-3:2009 PUBLISHED DOCUMENT In order to overcome these impediments to safe use, PD 6702-1 has adapted the principle of the service category to provide a set of fully qu
32、antified service categories which are used to define in this document the extents of inspection and acceptance levels that are compatible with the recommended design rules in PD 6702-1 (see 4.2). For these reasons it is essential that the recommendations of this document are followed for execution w
33、hen the recommendations in PD 6702-1 have been used for the design. Additional information has been given in accordance with BS EN 1090-3:2008, Table A.1 and Table A.2, except where it relates to matters which might be dependent on a specific project.4.2 Service category (see BS EN 1090-3:2008, 3.13
34、) These recommendations make use of the following quantified service category designations in increasing order of performance requirement: F12, F20, F25, F31, F40, F50, F63 (see 4.1). If no quantified service category is specified for a structure, component or part of a component, it should be assum
35、ed that F20 applies. NOTE 1 The background to the quantified service category designations can be found in PD 6702-1. NOTE 2 The following subclauses of this document contain recommendations which are differentiated on the basis of quantified service category: 4.5.1, 4.5.2, 4.6.1, 4.6.3, 4.7.4, 4.8.
36、1, 4.10.1.2, 4.10.2, 4.10.3, 4.10.4 and 4.10.5.4.3 Execution classes (see BS EN 1090-3:2008, 3.8 and 4.1.2) It should be noted that the execution class (EXC) provides a measure of the degree of assurance that the work has or will be carried out to the required quality. This is primarily differentiat
37、ed by the extent of documented records as well as procedure and product testing. It does not define the quality requirement itself, which is dependent on the service category (see 4.2). NOTE The following subclauses of this document contain additional recommendations relating to those requirements i
38、n BS EN 1090-3 which are differentiated on the basis of execution class: 4.4.1, 4.4.2, 4.7.2, 4.7.3, 4.7.5, 4.7.6, 4.8.2 and 4.10.3.4.4 Specification and documentation4.4.1 Quality documentation (see BS EN 1090-3:2008, 4.2.1 and Annex B) It is recommended that BS EN 1090-3:2008, 4.2.1, items a) to f
39、) are documented for EXC2, regardless of whether this documentation has been specified.4.4.2 Quality plan (see BS EN 1090-3:2008, 4.2.2 and Annex B) It is recommended that a quality plan appropriate to the work and based on BS EN 1090-3:2008, Annex B, is prepared wherever EXC2, EXC3 or EXC4 is speci
40、fied.4 BSI 2009 PD 6705-3:2009 PUBLISHED DOCUMENT4.5 Constituent products4.5.1 Wrought products (see BS EN 1090-3:2008, 5.3 and Table 1) Where hollow extrusions formed by a porthole or bridge die are used to carry tension transverse to the direction of extrusion, special precautions should be taken
41、during the extrusion process to verify that the die seam welds are structurally sound. These precautions are as follows. a) The start, finish and intermediate billet-to-billet joint positions in each extruded length should be identified. b) Sample sections from the extrusion should be cut out from t
42、he locations identified in item a). Where more than one cell exists in the cross-section, two adjacent sections should be cut out. c) Alternate cells in the first cross-section should be subjected to expansion by forcing a tapered mandrel or “drift” into the cell until tearing occurs. This process s
43、hould be repeated on the adjacent cells in the second section. d) The tear fracture faces should be examined for evidence of poor bonding and low ductility of the extrusion weld. e) If evidence of poor bonding is found, further sections should be taken from the extrusion and retested as in items c)
44、and d) until sound lengths of extrusion are revealed. f) Where it is practicable to conduct transverse tensile tests from samples taken from seam weld locations, the mechanical properties should be shown to conform to the relevant product standard. g) In critical cases where a high transverse tensil
45、e utilization grade is required or where the quantified service category exceeds F20 in the transverse direction, it is recommended that the billet is subjected to non-destructive testing (NDT) to prove that it is free from internal flaws.4.5.2 Castings (see BS EN 1090-3:2008, 5.3 and Table 3) It is
46、 recommended that the guidance given in BS EN 1999-1-1:2007, C.3.4.2, is followed with the exception that the maximum diameter of pores given in BS EN 1999-1-1:2007, C.3.4.2(2), item b) should not be used. The maximum diameter of pores should instead conform to Table 1.Table 1 Maximum diameter of po
47、res Quantified service category Maximum pore size mm F12 4,0 F20 3,0 F25 2,2 F31 1,5 F40 0,9 F50 0,5 F63 0,3 BSI 2009 5 PD 6705-3:2009 PUBLISHED DOCUMENT If castings require subsequent machining, the machined surfaces should be subject to further surface inspection prior to incorporation into the st
48、ructure.4.5.3 Welding consumables (see BS EN 1090-3:2008, 5.5) The combination of parent material and consumable should conform to BS EN 1011-4:2000, Table B.2, unless otherwise specified. Where there is a choice of consumable type in this table, the criteria for selection should be agreed with the
49、project specifier. In all cases, the consumable should be of the same type used to qualify the weld procedures used for the project.4.6 Preparation4.6.1 Identification (see BS EN 1090-3:2008, 6.2) Hard stamps should not be used in the following circumstances: a) on 7000 alloy material; b) where quantified service categories above F20 are required; c) on thin material where denting might occur; d) where otherwise forbidden by the specifier. The same restrictions apply to soft o
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