1、STD-BSI BS EN 2257-ENGL 1777 P lb2qbb7 Ob20133 b BRITISH STANDARD AEROSPACE SERIES Circular tubes for structures in aluminium and aluminium alloys - Diameter 6 mm 5 D 5 100 mm - Thickness 1 mm 5 a 5 6 mm - Dimensions The European Standard EN 2257 : 1997 has the staius of a British Standard ICs 49.04
2、0.20 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHI LAW 7- BS EN 2267 : 1997 STD*BSI BS EN 2257-ENGL 2777 m 2b2Libb7 Ob2013Li 585 m BS EN 2267 : 1997 This British Standard, having been prepared under the direction of the Engineering Sector Board, was published under the authority
3、 of the Standards Board and comes into effect on 15 June 1997 O BSI 1997 The following BSI references relate to the work on this standard Committee reference ACW61 Draft for comment 96702854 DC Committees responsible for this British Standard The preparation of this British Standard was entrusted to
4、 Technical Committee ACW61, Inspection and bting requirements for aerospace metallic materials, upon which the foilowing bodies were represented: Aluminium Federation British Investment Casting ?kade Association Copper Development Association Light Metal Founders Association Ministry of Defence Nati
5、onal Phpical Laboratmy Society of British Aerospace Companies Limited UK Steel Association Amendments issued since publication Amd. No. Date I Te* IsTectd ISBN O 880 26686 9 - STD-BSI BS EN 2257-ENGL 1997 m 1b24bb Ob20135 411 m BS EN 2257 : 1997 Contents page Committees responsible Inside front cove
6、r Nalionai foreword ii Foreword 2 Specification O Introduction 1 Scope 3 3 2 Nonnative references 3 3 Form 3 4 Recommended dimensions and mass 4 6 Tolerances 4 O BSI 1997 i STD*BSI BS EN 2257-ENGL 1777 Lb2LibbS Ob20L3b 358 BS EN 2257 : 1997 National foreword This British Standard has been prepared b
7、y Technical Committee ACW61 and is the English language version of EN 2257 : 1997 Aerospace series - Circular tubes for structures in duminium and duminium alloys - DEameter 6 mm 5 D 5 100 mm - Thi only applicable to tubes supplied in fixed lengths Diameter 6SDS 100 Table 4 Straightness deviation Y,
8、 on any length X, 1) 17 5.2 Geometric tolerances - Straightness 5.2.1 See EN 3848. Method of measurement and symbols 5.2.2 Tolerances See table 5. d .,. I 1) x* = 1 O00 I STDmBSI BS EN 2257-ENGL 1777 lb24bb7 Ob20L42 b51 R BS EN 2257 : 1997 BSI 389 Chiswick High Road London w4 4AL BSI - British Stand
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