s BUSINESS REPROT TEMPLATE SS BUSINESS REPROT TEMPLATE BUSINESS REPROT TEMPLATE 0 Present The Company 01 AboutUs THE NOilsum dolor sit amet consectetur adipisicingelit seddo eiusmodtempor incididuntutlaboreet doloremagnaaliqua. Loremipsumdolorsitamet consecteturadipisicingelit seddoeiusmod temporincididuntutlaboreetdolore magnaaliqua.Utenimadminimveniam quisnostrudexercitationullamcolaborisnisiutaliquipexmodo. 5
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商业计划书 BUSINESS REPORT Logo 公司名称 目 录 1 项目简介 CONCENTS 2 项目计划 3 市场分析 4 投资回报 PART 01 项目简介 BUSINESS REPORT 投资亮点 MORE THEN TEMPLATE MORE THEN TEMPLATEMORE THEN TEMPLATE MORETHEN TEMPLATE Click here to add you to the center Click here to add you to the center Click here to add you to the center Clickhere toaddyouto thecenter of the narrative thought of the narrative thought of the narrative thought of the narrative thought 投资亮点 MORE THAN TEMPLATE TITLEGOSEHERE Clickhere toaddyou tothe Centerof the narrative thought MORE THAN TEMPLATE TITLEGOSEHERE Clickhere toaddyou to the Centerofthe narrative thought MORE THANTEMPLATE TITLEGOSEHERE Clickheretoaddyou to the Center of the narrative thought
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standard99g BSEN10025-2:2019 BSIStandardsPublication Hotrolledproductsofstructuralsteels结构钢热线产品 Part 2:Technical delivery conditions for non-alloy structural steels ss然w然*件 bsi. standard999 BS EN 10025-2:2019 BRITISH STANDARD Nationalforeword This British Standard is the UK implementation of EN 10025-2:2019. It supersedes BS EN 10025-2:2004 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee ISE/103 Structural Steels Other Than Reinforcements. A list of organizations represented on this mittee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2019 Published by BSI Standards Limited 2019 ISBN 978 0 580 73966 8 ICS 77.140.10; 91.100.99; 77.140.50; 77.140.45 Compliance with a British Standard cannot conferimmunity from legal obligations. This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 August 2019. Amendments/corrigenda issued since publication Date Text affected st andard999 BS EN 10025-2:2019 EUROPEANSTANDARD EN10025-2 NORMEEUROPEENNE EUROPAISCHENORM August 2019 ICS 77.140.10; 77.140.45; 77.140.50 Supersedes EN 10025-2:2004 English Version Hotrolledproducts of structural steels-Part 2:Technical deliveryconditionsfornon-alloystructuralsteels Produits lamines a chaud en aciers de construction - Warmgewalzte Erzeugnisse aus Baustahlen - Teil 2: Partie 2 : Conditions techniques de livraison pour les Technische Lieferbedingungen fur unlegierte aciers de construction non allies Baustihle This European Standard was approved by CEN on 16 June 2019. CEN members are bound to ply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of anational standard without any alteration.Up-to-date lists and bibliographical references concerming such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions English French German) A version in any othelanguage made b translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CENmmbers arethational standards bodiesfAustriaelgium Bulgariaroatia Cprus ech Reublic Dnmar Estoni Finlandaayrylannlaal Poland Portugal Republic of North Macedonia Romania Serbia Slovakia Slovenia Spain Sweden Switzerland Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMITE EUROPEEN DE NORMALISATION EUROPAISCHES KOMITEE FOR NORMUNG CEN-CENELEC Management Centre: Rue de la Science 23 B-1040 Brussels 2019 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref No. EN 10025-2:2019 E st andar d999 BS EN 10025-2:2019 EN10025-2:2019 (E) Contents Page European foreword. .4 1 Scope .6 2 Normativereferences.. 3 Terms and definitions. 8 4 Classification and designation.. 9 4.1 Classification. 9 4.1.1 Main quality classes.... 9 4.1.2 Grades and qualities... .9 4.2 Designation. 6“ 5 Information to be supplied by the purchaser. .9 5.1 Mandatory information.... 5.2 Options. 10 6 Manufacturingprocess.. .10 6.1 Steel making proces... 10 6.2 Deoxidation. 10 6.3 Delivery conditions.. .10 7 Requirements. 11 7.1 General 11 7.2 Chemical position.. .11 7.3 Mechanical properties. .12 7.3.1 General 12 7.3.2 Impact properties. 12 7.3.3 Improved deformation properties perpendicular to thesurface 12 7.4 Technological properties. 13 7.4.1 Weldability. 13 7.4.2 Formability and flame straightening. 13 7.4.3 Hot-dip zinc-coating 14 7.4.4 Machinability.. 14 7.5 Surface properties.. 14 7.5.1 Strip. .14 7.5.2 Plates and wide flat... .14 7.5.3 Sections. .14 7.5.4 Bars and rods 15 7.6 Internal soundness. 15 7.7 Dimensions tolerances on dimensions and shape mass. 15 8 Inspection. .15 8.1 Type of inspection and inspection document.. 15 8.2 Content ofinspection document. .16 8.3 Tests to be carried out for specific inspection. .16 9 16 9.1 Frequency of testing.. .16 9.1.1 Chemical analysis.. 16 9.1.2 Mechanical tests. 16 9.2 Preparation of samples and test pieces. 17 9.2.1 Selection and preparation of samplesfor chemical analysis. 17 9.2.2 Location of samples and orientation of test pieces for mechanical tests. .17 9.2.3 Preparation of test piecesformechanical tests.. 17 2 st andard999 BSEN 10025-2:2019 EN 10025-2:2019 (E) 9.3 Identification of samples and test pieces. 18 10 Test methods... 18 10.1 Chemical analysis. 18 10.2 Mechanical tests. 18 10.2.1 Tensile test.. 18 10.2.2 Impact test 19 10.3 Ultrasonic testing 19 10.4 Retests.. 19 11 Marking labelling packaging. .19 12 Complaints. 20 13 Options. .20 Annex A (normative) Location of samples and test pieces. ..36 AnnexB(informative)List of Options of EN 10025-2 to -6 39 Bibliography. .41 3
(2)保护接地适用于各种不接地配电网:保护接地电阻RE≤4Q.当配电变压器或发电机的容量不超过100 kVA时,可以放宽到RE≤10Q. L2 L N UR IT系统 TT系统 2)TT系统 漏电设备对地电压一般不能降低到安全范围以内 在TT系统中应装设能自动切断漏电故障的漏电保护装置 TT系统主要用于低压用户,即用于未装备配电变压器,从外面直接引进低压电源的小型用户.
3)TN系统 L TN-S系统可用于有爆炸危险,或火灾危险性较 3 L 大,或安全要求较高的场所,宜用于有独立附设 N 变电站的车间.
PE TN-C-S系统宜用于厂内设有总变电站,厂内低 压配电的场所及非生产性楼房.
TN-C系统可用于无爆炸危险、火灾危险性不大、 用电设备较少、用电线路简单且安全条件较好的 R 场所.