BS EN 1337-9-1998 Structural bearings - Protection《结构轴承 防护》.pdf

1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 1337-9 : 1998 The E

2、uropean Standard EN 1337-9 : 1997 has the status of a British Standard ICS 91.010.30 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Structural bearings Part 9. ProtectionThis British Standard, having been prepared under the direction of the Sector Board for Building and Civil

3、 Engineering, was published under the authority of the Standards Board and comes into effect on 15 March 1998 BSI 1998 ISBN 0 580 29428 5 BS EN 1337-9 : 1998 Amendments issued since publication Amd. No. Date Text affected National foreword This British Standard is the English language version of EN

4、1337-9 : 1997, published by the European Committee for Standardization (CEN). The UK participation in its preparation was entrusted to Technical Committee B/522, Structural bearings, which has the responsibility to: aid enquirers to understand the text; present to the responsible European committee

5、any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. The UK voted against this standard at the CEN Formal Vote stage, but the analysis of voting, in accordance with CEN

6、/CENELEC Internal Regulations Part 2 : Common rules for standards work, resulted in a positive vote. In consequence, the document was accepted as a European Standard. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Stand

7、ards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled International Standards Correspondence Index, or by using the Find facility of the BSI Standards Electronic Catalogue. Additional informatio

8、n Contrary to the advice given in paragraph 4 of the European foreword, this Part will come into effect before Parts 1 and 2. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, t

9、he EN title page, pages 2 to 6, an inside back cover and a back cover.CEN European Committee for Standardization Comite Europe en de Normalisation Europa isches Komitee fu r Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1997 CEN All rights of exploitation in any form and by any me

10、ans reserved worldwide for CEN national Members. Ref. No. EN 1337-9 : 1997 E EUROPEAN STANDARD EN 1337-9 NORME EUROPE ENNE EUROPA ISCHE NORM November 1997 ICS 91.010.30 Descriptors: Civil engineering, bearing devices, protection, specifications, environments, dust, corrosion prevention, fire protect

11、ion English version Structural bearings Part 9: Protection Appareils dappui structuraux Partie 9: Protection Lager im Bauwesen Teil 9: Schutz This European Standard was approved by CEN on 24 October 1997. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the c

12、onditions 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 Standard exists in th

13、ree 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 standards bodies of A

14、ustria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.Page 2 EN 1337-9 : 1997 BSI 1998 Foreword This European Standard has been prepared by Working Group 5 of Techn

15、ical Committee CEN/TC 167, Structural bearings, the secretariat of which is held by UNI. The European Standard prEN 1337 Structural bearings consists of the following 11 Parts: Part 1: General design rules Part 2: Sliding elements Part 3: Elastomeric bearings Part 4: Roller bearings Part 5: Pot bear

16、ings Part 6: Rocker bearings Part 7: Spherical and cylindrical PTFE bearings Part 8: Guided bearings and restrained bearings Part 9: Protection Part 10: Inspection and maintenance Part 11: Transport, storage and installation This Part 9 Protection includes annex A (informative). Further to CEN/TC 16

17、7s decision, Part 1 and Part 2 form a package of standards and they come into force together, while the other Parts come into force separately after the publication of Part 1 and Part 2. This European Standard shall be given the status of a national standard, either by publication of an identical te

18、xt or by endorsement, at the latest by May 1998, and conflicting national standards shall be withdrawn at the latest by May 1998. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria,

19、 Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom Contents Page Foreword 2 1 Scope 3 2 Normative references 3 3 Definitions 3 4 General requirements 4 5 Conformity

20、 evaluation 4 Annex A (informative) Recommendations 6Page 3 EN 1337-9 : 1997 BSI 1998 1 Scope This Part of this European Standard deals with the measures to protect structural bearings from the effects of the environment and other external influences which would reduce their working life. 2 Normativ

21、e references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate place in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any

22、of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references, the latest edition of the publication referred to applies. ISO 2409 : 1992 Paints and varnishes Cross-cut test ISO 2808 : 1991 Paints and varnishes Determination of fi

23、lm thickness ISO 4628-1 : 1982 Paints and varnishes Evaluation of degradation of paint coatings Designation of intensity, quantity and size of common types of defect Part 1: General principles and rating schemes ISO 4628-2 : 1982 Paints and vanishes Evaluation of degradation of paint coatings Design

24、ation of intensity, quantity and size of common types of defect Part 2: Designation of degree of blistering ISo 4628-3 : 1982 Paints and varnishes Evaluation of degradation of paint coverings Designation of intensity, quantity and size of common types of defect Part 3: Designation of degree of rusti

25、ng ISO 4628-4 : 1982 Paints and varnishes Evaluation of degradation of paint coatings Designation of intensity, quantity and size of common types of defect Part 4: Designation of degree of cracking ISO 4628-5 : 1982 Paints and varnishes Evaluation of degradation of paint coatings Designation of inte

26、nsity, quantity and size of common types of defect Part 5: Designation of degree of flaking ISO 6272 : 1993 Paints and varnishes Falling weight test ISO 7253 : 1996 Paints and varnishes Determination of resistance to neutral salt spray (fog) ISO 8501-1 : 1994 Preparation of steel substrates before a

27、pplication of paints and related products Visual assessment of surface cleanliness Part 1: Rust grades and preparation grades of uncoated steel substrates and of steel substrates after overall removal of previous coatings 3 Definitions For the purpose of this standard the following definitions apply

28、: 3.1 accidental damage: Damage inflicted on the bearing from factors to which it is not intentionally exposed. 3.2 environmental damage: Damage caused by factors associated with the location in which the bearing is intended to function and which could be predicted at the time the bearing is install

29、ed. 3.3 marine environment: Location affected by sea salt spray and with an average zinc corrosion rate between 30 g/m 2 per annum and 60 g/m 2 per annum (as 99,9 % Zn). 3.4 protection against corrosion: Measures taken to prevent damage to the bearing due to the corrosion of all, or parts thereof, f

30、or a time period specified. 3.5 protective coating: Any coating applied to the bearing, or parts thereof, to protect them from environmental damage. 3.6 protective measures: Any measures taken to protect the bearing, or parts thereof, from the effects of the environment and other external causes, th

31、at would otherwise reduce its working life. 3.7 working life: The specified period for which a corrosion protection system will provide the minimum performance required by the standard or otherwise agreed.Page 4 EN 1337-9 : 1997 BSI 1998 Table 1. Test Standard Acceptance criteria After: 720 hours; N

32、o blister in excess of Grade 1 of ISO 4628-2; Neutral salt spray ISO 7253 No rust in excess of Ri 1 of ISO 4628-3; No breakdown in excess of Class 1 of ISO 4628-4; No flaking Class 1 in exess of ISO 4628-5. Minimum dry film thickness ISO 2808 As specified by the paint manufacturer Cross-cut ISO 2409

33、 0 or 1 Falling-weight ISO 6272 No visible damage with 1 kg ball and fall of 10 cm 4 General requirements 4.1 Protection against environmental influences 4.1.1 Corrosion protection This clause specifies the corrosion protection requirements for the metallic components of structural bearings that wou

34、ld otherwise suffer environmental damage due to corrosion. It excludes surfaces subject to sliding, rolling, friction grip or local pressure. 4.1.1.1 Performance The system for protection against corrosion qualified in accordance with this standard shall ensure that for a period of ten years after d

35、elivery the items meet the requirements detailed below, provided the bearings have been handled, stored and installed in accordance with this standard: No blistering density in excess of Grade 1 of ISO 4628-2. No rusting in excess of rust Grade Ri: 1 of ISO 4628-3. No breakdown of coating in excess

36、of Class 1 of ISO 4628-4. No degree of flaking in excess of Class 1 of ISO 4628-5. Where the bearing is to be installed in an environment more aggressive than a marine environment, alternative corrosion protection requirements may need to be agreed. 4.1.1.2 Documentation To define the corrosion prot

37、ection system, the following shall be documented: Manufacturers procedure for the corrosion protection of bearings; Material suppliers specifications; Tests. The above shall include as a minimum the following: Standard of surface preparation (e.g. Sa 2 in accordance with ISO 8501 Sa); Type of protec

38、tive coating (e.g. sprayed zinc, two pack epoxy acrylated rubber); Number of coats; For paint systems: Item number and colour; Brand name and manufacturers reference number; Datasheet number; Where applied; How applied; Minimum dry film thickness; Maximum local dry film thickness; Procedures for tre

39、atment of local damage to protective coatings; Results of the tests according with table 1. These tests shall be repeated every five years or whenever a change to the corrosion protection system is made. 4.2 Electrolytic corrosion Where dissimilar metals are used, care shall be taken to avoid electr

40、olytic corrosion. 5 Conformity evaluation 5.1 General The tests and inspections specified in this clause shall be carried out to demonstrate the products conformity with this European Standard. The tests and inspection are required under a production control scheme. If and when in addition to produc

41、tion control, third party control is required, the type tests shall be performed prior to commencing the third party control. Results of previous type tests are only valid if no changes in production have occurred which influence conformity to this European Standard. When during third party audit te

42、sting, a non-conformance is detected, the audit test specified in this clause shall be repeated on a further sample. If a further non-conformance is detected, the causes of the non-conformity shall be traced and rectified. Documentary evidence that the non-compliance has been rectified shall be incl

43、uded in the manufacturers records.Page 5 EN 1337-9 : 1997 BSI 1998 5.2 Control of raw and constituent materials and components The bearing manufacturer shall verify that the incoming raw and constituent materials and components have been subjected to a production control scheme (sampling tests, freq

44、uencies, etc.) and, if when required, to a third party control. The result of the verification shall be noted in the manufacturers records. The bearing manufacturer shall ensure that incoming raw and constituent materials and components are not used and processed (except in circumstances described b

45、elow) until they have been verified as conforming. Where incoming raw and constituent materials and components are released for urgent production purposes, they shall be positively identified and recorded in order to permit immediate recall and replacement in the event of non-conformance to specifie

46、d requirements. 5.3 Control of finished product The system for corrosion protection shall be subjected to test in accordance with table 1. These tests shall be repeated every five years or whenever a change to the corrosion protection system is made.Page 6 EN 1337-9 : 1997 BSI 1998 Annex A (informat

47、ive) Recommendations Structural bearings, properly designed and fabricated in accordance with the other Parts of this European Standard, can be expected to last for at least several decades and, in many cases, as long as the structure which they support. Their life can however be shortened considera

48、bly if they are not protected from the aggressive elements of the environment in which the structure they are supporting is situated. When the environment is more aggressive than a marine environment, it is essential that the purchaser gives full details of the environment in which the bearing will

49、be installed, describing any localized factors which may modify the general area affected. Corrosion protection measures take either the form of choosing a material for exposed parts of the bearing to which the environment is not aggressive, or of providing exposed parts of the bearings with a protective coating, or some other device, such as an oil bath, to isolate them from the environment. Manufacturers can normally be expected to have one or more protective sys