1、BRITISH STANDARD BS EN 60721-3-6:1993 IEC 721-3-6: 1987 Incorporating Amendment No. 1 to BS7527-36:1991 (which renumbers the BS as BSEN 60721-3-6:1993) and implementing Amendment No.1 to BSEN60721-3-6: 1993, not published separately Classification of environmental conditions Part 3: Classification o
2、f groups of environmental parameters and their severities Section 3.6 Ship environment The European Standard EN60721-3-6:1993 has the status of a British Standard ICS 19.040BSEN60721-3-6:1993 This British Standard, having been prepared under the directionof the General Electrotechnical Standards Pol
3、icyCommittee, was publishedunder the authority ofthe Standards Board and comesinto effect on 29November1991 BSI 07-1999 The following BSI references relate to the work on this standard: Committee reference GEL/15 Special announcement in BSINews July1991 ISBN 0 580 20181 3 Committees responsible for
4、this British Standard The preparation of this British Standard was entrusted by the General Electrotechnical Standards Policy Committee (GEL/-) to Technical Committee GEL/15, upon which the following bodies were represented: Directorate of Telecommunications EEA (the Association of Electronics, Tele
5、communications and Business Equipment Industries) Electronic Components Industry Federation Ministry of Defence National Supervising Inspectorate Society of Environmental Engineers Society of Motor Manufacturers and Traders Limited Amendments issued since publication Amd. No. Date Comments 7948 Augu
6、st 1993 9516 June 1997 Indicated by a sideline in the marginBSEN60721-3-6:1993 BSI 07-1999 i Contents Page Committees responsible Inside front cover National foreword ii Foreword 2 1 Scope 3 2 Object 3 3 General 3 4 Classification of groups of environmental parameters and their severities 3 Appendix
7、 A Summary of conditions covered by the classes 8 Appendix B (informative) Explanation of the environmental conditions in tropical areas as specified in classes 6K6 and 6K7 9 Annex ZA (normative) Other international publications quoted in this standard with the references of the relevant European pu
8、blications 12 Figure 1 Model shock response spectra (first order maximax shock response spectra) 7 Figure B.1 Climatograms for tropical damp type of climate and tropical dry type of climate 11 Table I Classification of climatic conditions 4 Table II Classification of biological conditions 5 Table II
9、I Classification of chemically active substances 5 Table IV Classification of mechanically active substances 5 Table V Classification of mechanical conditions 6 Publication(s) referred to Inside back coverBSEN60721-3-6:1993 ii BSI 07-1999 National foreword This British Standard has been prepared by
10、Technical Committee GEL/50/(formerly GEL/15) and is the English language version of EN60721-3-6:1993Classification of environmental conditions Part3:Classification of groups of environmental parameters and their severities Section6 Ship environment, and its amendment A2, published by the European Co
11、mmittee for Electrotechnical Standardization (CENELEC). It is identical with IEC727-3-6:1987 including its corrigendum:1987 and its amendments1 and2, published by the International Electrotechnical Commission (IEC). Other Parts of this British Standard are as follows. Part 1: Environmental parameter
12、s and their severities; Part 2: Environmental conditions appearing in nature; Section 2.1: Temperature and humidity; Section 2.2: Precipitation and wind; Section 2.3: Air pressure; Section 2.4: Solar radiation and temperature; Section 2.5: Dust, sand, salt mist; Section 2.6: Earthquake vibration and
13、 shock; Section 2.7: Fauna and flora; Part 3: Classification of groups of environmental parameters and their severities; Section 3.0: Introduction; Section 3.1: Storage; Section 3.2: Transportation; Section 3.3: Stationary use at weatherprotected locations; Section 3.4: Stationary use at non-weather
14、protected locations; Section 3.5: Ground vehicle installations; Section 3.7: Portable and non-stationary use. The Technical Committee has reviewed the provisions of IEC92-101:1980and IEC92-502:1980, to which reference is made in the text, and has decided that they are acceptable for use in conjuncti
15、on with this British Standard. In Table V, footnote2) includes the sentence “For explanation see Sub-clause5.3 of IEC Publication721-1.” This should be read as “For explanation seenote6relating to Table1of IEC721-1(1990).” Cross-references International standard Corresponding British Standard IEC 72
16、1-1:1990 BS 7527 Classification of environmental conditions Part 1:1991 Environmental parameters and their severities (Identical) IEC 721-2-1:1982 Section 2.1:1991 Temperature and humidity (Identical) IEC 721-3-0:1984 Section 3.0:1991 Introduction (Identical)BSEN60721-3-6:1993 BSI 07-1999 iii A Brit
17、ish Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a fron
18、t cover, an inside front cover, pages i to iv, theENtitle page, pages 2 to 12, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.iv blankEUROPEAN
19、 STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60721-3-6 May 1993 + A2 January 1997 UDC 621.3:620.193.001.33:629.12 Supersedes HD 478.3.6 S1:1989 Descriptors: Environmental conditions, ship environment English version Classification of environmental conditions Part3:Classification of groups of environ
20、mental parameters and their severities Ship environment (includes amendment A2:1997) (IEC 721-3-6:1987 + A1:1991 + A2:1996) Classification des conditions denvironnement Troisime partie: Classification des groupements des agents denvironnement et de leurs svritis Environnement des navires (inclut lam
21、endement A2:1997) (CEI 721-3-6:1987 + A1:1991 + A2:1996) Klassifizierung von Umweltbedingungen Teil3: Klassen von Umwelteinflugren und deren Grenzwerte Einsatz auf Schiffen (enthlt nderung A2:1997) (IEC 721-3-6:1987 + A1:1991 +A2:1996) This European Standard was approved by CENELEC on1993-03-09. CEN
22、ELEC members are bound to comply with the CEN/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
23、application to the Central Secretariat or to any CENELEC 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 CENELEC member into its own language and notified to the Central Secr
24、etariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and UnitedKingdom. CENELEC
25、 European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1993 Copyright reserved to CENELEC members Ref. No. EN 60721-3-6:1993 + A2:1997EN60721-3-
26、6:1993 BSI 07-1999 2 Foreword At the request of the72 Technical Board, the text of the International Standard IEC721-3-6:1987and its amendment1:1991was submitted to the CENELEC members for formal vote. The text of the reference document was approved by CENELEC as EN60721-3-6on9March1993. This Europe
27、an Standard replaces HD478.3.6S1:1989. The following dates were fixed: Annexes designated “normative” are part of the body of the standard. In this standard, Annex ZA is normative. Foreword to amendment A2 The text of document75/282/FDIS, future amendment2 to IEC721-3-6:1987, prepared by IECTC75, Cl
28、assification of environmental conditions, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as amendment A2to EN60721-3-6:1993 on1996-12-09. The following dates were fixed: latest date of publication of an identical national standard (dop) 1994-03-01 latest date of withdrawa
29、l of conflicting national standards (dow) 1994-03-01 latest date by which the amendment has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 1997-09-01 latest date by which the national standards conflicting with the amendment have to be wi
30、thdrawn (dow) 1997-09-01EN60721-3-6:1993 BSI 07-1999 3 1 Scope This part of the standard classifies groups of environmental parameters and their severities to which a product is subjected when installed aboard a ship. Ships where products may be permanently or temporarily installed include: ships pr
31、opelled by mechanical means, including mobile offshore units; ships not propelled by mechanical means, including sailing boats and life rafts. The classes defined apply to all sizes of ships from pleasure craft to trawlers, ferry boats, icebreakers, cargo ships including tankers. The areas in which
32、ships normally navigate are: inland waterways (canals, rivers, lakes); coastal waters; oceans. Areas where ships have to navigate in ice are also included. The environmental condition classification given in this standard applies to products which are installed for the running, handling and safety o
33、f the ship. It may also be used for other products installed in a similar way and in the same locations. Accidental incidents are not included, but the possibility of their occurrence may need to be taken into account for products vital to the safety of the ship. The classification does not cover th
34、e effect of water pressure on submerged products. For the use of the classified environmental parameters and their severities in ships propelled by mechanical means, see the environmental conditions specification in IEC Publication92-101. Classifications of storage and transportation environmental c
35、onditions are given in other parts of IEC Publication721-3. 2 Object To classify groups of environmental parameters and their severities to which a product will be exposed under its conditions of use when installed aboard ships. A limited number of classes of environmental parameters and their sever
36、ities is laid down covering a broad field of applications. The user of this standard should select the lowest class necessary for covering the conditions of the intended use. 3 General For further general guidance, seeIECPublication721-3-0. The severities given are those which will have a low probab
37、ility of being exceeded. Only severe conditions which may affect the structural integrity or functional performance of a product are included. Depending on the local situation there may be different frequencies of occurrence related to a certain period of time. Such frequencies of occurrence should
38、be considered for any environmental parameter. They should additionally be specified if applicable. Information on duration and frequency of occurrence is given in Amendment No.1to IEC Publication721-3-0as Clause6. 4 Classification of groups of environmental parameters and their severities A limited
39、 number of classes for climatic conditions (K), biological conditions (B), chemically active substances (C), mechanically active substances (S), and mechanical conditions (M) are given in Table I, Table II, Table III, Table IV and Table V. For a given product, reference should be made to the total s
40、et of classes, for example:6K3/6B1/6C2/6S1/6M3. The combination of the lowest classes6K1/6B1/6C1/6S1/6M1 forms the condition to which a product will be subjected when installed only in totally weatherprotected locations aboard ships not propelled by mechanical means. The combination of the highest c
41、lasses6K5/6B2/6C3/6S3/6M4 covers a wide number of installations aboard most types of ships including locations with very severe conditions. Climatic conditions on tropical areas as specified in classes6K6 and6K7 are explained in Appendix B. A class of conditions normally includes classes with lower
42、severity digits. For certain parameters it has not yet been possible to give quantitative severities. A summary of conditions covered by the classes is given in Appendix A.EN 60721-3-6:1993 4 BSI 07-1999 Table I Classification of climatic conditions Environmental parameter Unit Class 6K1 6K2 6K3 6K4
43、 6K5 6K6 f 6K7 f a) Low temperature, air C + 5 25 25 a 25 40 b + 5 20 b) Low temperature, water C Freezing point of water c + 15 + 15 c) High temperature, air C + 40 + 40 + 55 + 70 + 70 + 55 + 70 d) High temperature, surfaces d C None None None + 70 + 70 + 70 + 70 e) High temperature, water C + 30 +
44、 35 + 35 + 35 + 35 + 35 + 35 f) Gradual change of temperature, air/air C C/min None 25/+ 20 1 20/+ 40 3 a 25/+ 40 3 25/+ 40 3 + 5/+ 40 3 20/+ 40 3 g) Change of temperature, air/water C None None None + 40/+ 5 + 40/+ 5 + 40/+ 15 + 40/+ 15 h) Humidity, not combined with rapid temperature changes % C 9
45、5 + 30 95 + 35 95 + 35 95 + 45 95 + 45 95 + 35 95 + 45 i) Humidity, combined with rapid temperature changes, air/air at high relative humidities % C None None 95 25/+ 35 95 25/+ 35 95 25/+ 35 95 + 5/30 95 20/+ 35 j) Humidity, combined with rapid temperature changes, air/air at high water content e g
46、/m 3 C None None None 60 + 70/+ 15 60 + 70/+ 15 60 + 55/+ 15 60 + 70/+ 15 k) Low relative humidity % C 10 + 30 10 + 30 10 + 30 10 + 30 10 + 30 10 + 30 10 + 30 l) Movement of surrounding medium, air m/s Negligible Negligible Negligible 30 50 50 50 m) Precipitation, rain mm/min None None None 6 15 15
47、15 n) Radiation, solar W/m 2 Negligible 700 700 1120 1 120 1120 1120 o) Radiation, heat W/m 2 Negligible 600 1200 1200 1200 1200 1200 p) Water from sources other than rain m/s None 0.3 0.3 3 10 10 10 q) Wetness None No Wet surfaces a A number of products located in machinery spaces are only required
48、 to operate after a period of warm-up of the machinery spaces. For these products the low temperature for operation is + 5C, and the gradual change of temperature condition only applies to the non-operational state. b Ships will normally not navigate when air temperatures are below 40C. Products may
49、, however, be left unprotected on ships which are temporarily laid up in harbour for the coldest period of the year. In such cases, products in the non-operational state, may have to withstand temperatures down to 55C. In exceptional cases in inland waters, ships may also navigate when temperatures are below 40C. c Freezing point may be lower than 0C due to presence of salt or pollution, etc. d Surface temperatures refer to hot parts to w
