《bs英國標(biāo)準(zhǔn)】bs en 81831999 升降用的短節(jié)鏈條.安全.吊鏈用中等公差鏈條.4級》由會員分享，可在線閱讀，更多相關(guān)《bs英國標(biāo)準(zhǔn)】bs en 81831999 升降用的短節(jié)鏈條.安全.吊鏈用中等公差鏈條.4級（17頁珍藏版）》請在裝配圖網(wǎng)上搜索。
1、
BRITISH STANDARD
Short link chain for lifting purposes D Safety D
Part 3: Medium tolerance chain for chain slings D Grade 4
The European Standard EN 818-3:1999 has the status of a
British Standa
2、rd
ICS
| BS EN
818-3:1999
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
3、
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW
BS EN 818-3:1999
National foreword
This British Standard is the English langua
4、ge version of EN 818-3:1999. It supersedes
BS 4942-3:1981 which is withdrawn.
The UK participation in its preparation was entrusted to Technical Committee
MHE/1, Chains and fittings, which has the responsibility to:
D aid enquirers to understand the text;
D present to the responsible Eur
5、opean committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed;
D monitor related international and European developments and promulgate them in the UK.
A list of organizations represented on this committee can be obtained on request to its
6、 secretary.
Cross-references
The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled aInternational Standards Correspondence Indexo, or by using the
aFindo facility of
7、the BSI Standards Electronic Catalogue.
A British 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 oblig
8、ations.
Summary of pages
This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 13 and a back cover.
The BSI copyright notice displayed in this document indicates when the document was last issued.
Amd. No.
Date
C
9、omments
This British Standard, having been prepared under the direction of the Engineering
Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 September 1999
BSI 09-1999
ISBN 0 580 32562 8
Amen
10、dments issued since publication
EUROPEAN STANDARD EN 818-3
NORME EUROPéENNE
EUROP?ISCHE NORM May 1999
ICS
English version
Short link chain for lifting purposes — Safety — Part 3: Medium tolerance chain for chain slings — Grade 4
Cha?nes de levage à maillons courts —
11、 Sécurité — Partie 3: Cha?nes de tolérance moyenne pour élingues en cha?nes — Classe 4
Kurzgliedrige Rundstahlketten für Hebezwecke — Sicherheit — Teil 3: Mitteltolerierte Rundstahlketten für Anschlagketten — Güteklasse 4
This European Standard was approved by CEN on 16 April
12、1999.
CEN 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 obta
13、ined on application to the Central Secretariat or to any CEN 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 CEN member into its own language and notified to the Central S
14、ecretariat has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
15、
CEN
European Committee for Standardization Comité Européen de Normalisation Europ?isches Komitee für Normung
Central Secretariat: rue de Stassart 36, B-1050 Brussels
? 1999 CEN All rights of exploitation in any form and by any means reserved worldwide for
16、CEN national
Members.
Ref. No. EN 818-3:1999 E
Contents
Page
Foreword
3
0 Introduction
4
1 Scope
4
2 Normative references
4
3 Terms and definitions
5
4 Hazards
5
5 Safety requirements
5
6 Verification of safety requirements
8
7 Marking
10
8 Manufacturer’s certifica
17、te
10
9 Instructions for use
10
Annex A (informative) Calculation of dimensions, working load limits and mechanical properties
10
Annex B (informative) Mass of chain
12
Annex C (informative) Designation system for chain (medium tolerance) — Grade 4
13
Annex ZA (informative) Relationshi
18、p of this European Standard with EU Directives
13
Foreword
This European Standard has been prepared by Technical Committee CEN/TC 168, Chains, ropes, webbing, slings and accessories — Safety, the Secretariat of which is held by BSI.
This European Standard shall be given the status
19、of a national standard, either by publication of an identical text or by endorsement, at the latest by November 1999, and conflicting national standards shall be withdrawn at the latest by November 1999.
This European Standard has been prepared under a mandate given to CEN by the European Commiss
20、ion and the
European Free Trade Association, and supports essential requirements of EU Directive(s).
For relationship with EU Directive(s), see informative annex ZA, which is an integral part of this standard. According to the CEN/CENELEC Internal Regulations, the national standards organizations
21、of the following
countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.
The other parts of EN 818
22、are:
Part 1: General conditions of acceptance
Part 2: Medium tolerance chain for chain slings — Grade 8
Part 4: Chain slings — Grade 8
Part 5: Chain slings — Grade 4
Part 6: Chain slings — Specification for information for use and maintenance to be provided by the manufacturer
Part 7: Fi
23、ne tolerance chains for hoists, Grade T (types T, DAT, DT)
This is the first edition of this part of EN 818.
0 Introduction
This European Standard has been prepared to be a harmonized standard to provide one means of complying with the essential safety requirements of the Machinery Dire
24、ctive and associated EFTA regulations.
The Directive stipulates that, where chain with welded links is used for lifting accessories, it is to be of short link type and for the purposes of this standard this is chain having a ratio of nominal pitch to nominal size of 3:1.
The extent to which ha
25、zards are covered is indicated in the Scope. In addition, lifting equipment shall conform as appropriate to EN 292 for hazards which are not covered by this standard.
1 Scope
This part of EN 818 specifies the requirements related to safety for short link lifting chains, grade 4, of medium to
26、lerance for use in chain slings and for general lifting purposes. The standard is applicable to electrically
welded round steel short link chains, conforming to EN 818-1, which are intended for lifting objects, materials or goods.
The range of nominal sizes of chain covered by this part of EN 81
27、8 is from 7 mm to 45 mm. The hazards covered by this part of EN 818 are identified in clause 4.
Annex A contains the bases for calculation of tabulated values for dimensions, working load limits and mechanical properties.
Annex B gives information on the mass/metre of chain.
Annex C gives an
28、example of a designation system for chains of grade 4. Annex ZA gives the relationship with EU Directives.
2 Normative references
This European Standard incorporates, by dated or undated reference, provisions from other publications. These normative references are cited at appropriate places
29、 in the text and the publications are listed hereafter. For dated references, subsequent amendments to, or revisions of, any 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 refer
30、red to applies.
EN 292-1, Safety of machinery — Basic concepts, general principles for design —
Part 1: Basic terminology, methodology.
EN 292-2:1991/A1:1995, Safety of machinery — Basic concepts, general principles for design —
Part 2: Technical principles and specifications.
EN
31、818-1:1996, Short link chain for lifting purposes — Safety — Part 1: General conditions of acceptance.
prEN 818-6, Short link chain for lifting purposes — Safety — Part 6: Chain slings — Specification for information for use and maintenance to be provided by the manufacturer.
EN 1050:1996
32、, Safety of machinery — Principles for risk assessment.
EN 10025:1990/A1:1993, Hot rolled products of non-alloy structural steels — Technical delivery conditions
(includes amendment A1:1993).
ISO 643, Steels — Micrographic determination of the ferritic or austenitic grain size.
3 Term
33、s and definitions
For the purposes of this part of EN 818, the terms, definitions and symbols given in EN 818-1:1996 apply.
4 Hazards
The release of a load due to failure of lifting accessories such as chain slings or their component parts puts at risk either directly or indirectly the sa
34、fety or health of those persons within the danger zone of lifting equipment.
In order to provide the necessary strength and durability of lifting accessories this part of EN 818 lays down requirements for the design, manufacture and testing to ensure that specified levels of performance are met.
35、
Fatigue failure has not been identified as being a hazard when chain, having the specified levels of performance given in this part of EN 818, is used in general lifting service.
Since failure can be caused by the incorrect choice of grade and specification of lifting accessories this part of
36、
EN 818 also gives the requirements for marking and the manufacturer’s certificate. Those aspects of safe use associated with good practice are given in prEN 818-6.
Table 1 contains those hazards which require action to reduce risk identified by risk assessment as being specific and significant for
37、 short link chain (medium tolerance) grade 4.
Table 1 — Hazards and associated requirements
Hazards identified in EN 1050:1996, annex A
Relevant clause of EN 292-2:1991/A1:1995, annex A
Relevant clause/subclause of this part of EN 818
1e)
Mechanical hazard due to
inadequacy of strength
38、
5
5
5
6
7
8
9
5 Safety requirements
5.1 General
The chain shall also conform to the appropriate requirements of EN 818-1:1996.
5.2 Dimensions
5.2.1 Nominal size of chain, dn
The nominal size of the chain shall be one of the sizes listed in Table 2, column 1.
39、
5.2.2 Tolerance on material diameter (except at the weld)
The tolerance on the material diameter for each nominal size of chain shall be in accordance with Table 2, column 2.
5.2.3 Weld diameter
The maximum diameter at the weld for each nominal size of chain shall be in accordance wit
40、h Table 2, column 3.
The thickness of the steel at the weld shall nowhere be less than the actual diameter of the steel adjacent to the weld.
5.2.4 Length dimensionally affected by welding
The length dimensionally affected by welding e (see EN 818-1:1996, Figure 1) shall not extend by more
41、than
0,6dn to either side of the centre of the link.
5.2.5 Pitch and widths
The dimensions of the pitch and widths of the individual links and chain shall be as specified in Table 2, columns 4 to 8, and illustrated in EN 818-1:1996, Figure 1.
Table 2 — Dimensions
Dimensions
mm
(1)
42、
(2)
(3)
(4)
(5)
(6)
(7)
(8)
Nominal size
dn
Material diameter tolerance
Weld diameter
ds
max.
Pitch
Internal width away from the weld
w1
min.
External width over the weld
w2
max.
pn
pmax
pmin
7
±0,28
7,7
21
21,6
20,4
9,1
25,9
8
±0,32
8,8
24
24,7
23,3
10,
43、4
29,6
10
±0,4
11
30
30,9
29,1
13
37
13
±0,52
14,3
39
40,2
37,8
16,9
48,1
16
±0,64
17,6
48
49,4
46,6
20,8
59,2
18
±0,9
19,8
54
55,6
52,4
23,4
66,6
19
±1
20,9
57
58,7
55,3
24,7
70,3
20
±1
22
60
61,8
58,2
26
74
22
±1,1
44、
24,2
66
68
64
28,6
81,4
23
±1,2
25,3
69
71,1
66,9
29,9
85,1
25
±1,3
27,5
75
77,3
72,8
32,5
92,5
26
±1,3
28,6
78
80,3
75,7
33,8
96,2
28
±1,4
30,8
84
86,5
81,5
36,4
104
32
±1,6
35,2
96
98,9
93,1
41,6
118
36
±1,8
39,6
108
45、
111
105
46,8
133
40
±2
44
120
124
116
52
148
45
±2,3
49,5
135
139
131
58,5
167
5.3 Materials and heat treatment
5.3.1 Quality of material
5.3.1.1 General
Within the limitations given in 5.3.1.2 to 5.3.1.4 the chain manufacturer shall select the ty
46、pe of steel to be used so that the finished chain, when suitably heat-treated, meets the mechanical properties specified in this part of EN 818.
5.3.1.2 Type of steel
The steel used shall be produced by an electric process or by an oxygen blown process.
5.3.1.3 Deoxidation
The steel shal
47、l be fully killed as defined in EN 10025:1990/A1:1993, be stabilized against strain age embrittlement and have an austenitic grain size of 5 or finer when tested in accordance with ISO 643.
5.3.1.4 Chemical composition
To ensure that chain is stabilized against strain age embrittlement during
48、service the steel shall contain at least
0,025 % aluminium.
The steel shall contain no more sulfur and phosphorus content than the limits given in Table 3.
Table 3 — Sulfur and phosphorus content
Element
Maximum mass content % as determined by
Cast analysis
Check analysis
Sulfur
0,
49、025
0,030
Phosphorus
0,025
0,030
The silicon content shall be as specified in Table 4.
NOTE The purpose of this requirement is to limit the detrimental effect when the chain is used in a galvanizing bath.
Table 4 — Silicon content
Element
Mass content % as determined by
Cast an
50、alysis
Check analysis
Silicon
0,12 to 0,30
0,15 to 0,35
5.3.2 Heat treatment
All the chain shall be heat-treated in accordance with a) or b) before being subjected to the manufacturing proof force.
a) Chain shall be hardened from a temperature above the AC3 point and tempered. The tempe
51、ring temperature shall be at least 475 °C.
The tempering conditions shall be at least as effective as a temperature of 475 °C maintained for a period of
1 h.
NOTE A method of verification is to test sample chains after they have been reheated to and maintained for 1 h at 475 °C and then cool
52、ed to room temperature; following which they should conform in the finished condition to the requirements of 5.4.2 and .
b) Alternatively the chain shall be normalized from a temperature above the AC3 point.
5.4 Mechanical properties
5.4.1 Manufacturing proof force (MPF)
All the chai
53、n shall be subjected to the manufacturing proof force specified in Table 5, column 3 for the appropriate nominal size of chain.
5.4.2 Breaking force (BF) and total ultimate elongation (A)
Samples of chain in the finished condition shall have a breaking force at least equal to that specified in
54、 Table 5, column 4 for the appropriate nominal size of chain. On completion of the static tensile test the total ultimate elongation as defined in EN 818-1:1996 shall be not less than 25 %.
5.4.3 Bend deflection
Single link samples shall withstand the minimum deflection specified in Table 5, c
55、olumn 5 for the appropriate nominal size of chain and shall be free from visible defects.
Table 5 — Working load limits and test requirements
1
2
3
4
5
Nominal size,
dn
mm
Working load limit,
WLL
t
Manufacturing proof force, MPF
kN
Breaking force, BF
kN
min.
Bend def
56、lection, f
mm min.
7
0,75
15,4
30,8
5,6
8
1
20,1
40,2
6,4
10
1,6
31,4
62,8
8
13
2,65
53,1
106
10
16
4
80,4
161
13
18
5
102
204
14
19
5,6
113
227
15
20
6,3
126
251
16
22
7,5
152
304
18
23
8
166
332
18
25
10
196
39
57、3
20
26
10,6
212
425
21
28
12,5
246
493
22
32
16
322
643
26
36
20
407
814
29
40
25
503
1 010
32
45
31,5
636
1 270
36
6 Verification of safety requirements
6.1 Qualification of personnel
All testing and examination shall be carried out by
58、a competent person.
6.2 Size of lot and selection of samples
The size of the lot from which samples shall be selected shall be 400 m. An excess fraction of the length of lot shall be considered as a separate lot. Samples shall be selected as specified in EN 818-1.
6.3 Manufacturing proo
59、f force, breaking force and total ultimate elongation
6.3.1 Static tensile test
The testing machine and test procedure for the static tensile test shall be as specified in EN 818-1.
6.3.2 Manufacturing proof force acceptance criteria
All the chain shall sustain the manufacturing proof fo
60、rce specified in .
6.3.3 Breaking force and total ultimate elongation acceptance criteria
On completion of the static tensile test the requirements of 5.4.2 shall be met.
6.4 Bend deflection
6.4.1 Bend test
The test equipment and procedure shall be as specified in EN 818-1.
Each si
61、ngle link sample shall be bent to the minimum deflection, f, as shown in Figure 1 and given in Table 5, column 5.
Following the removal of the force, the link sample shall be examined.
NOTE Where necessary a surface coating may be removed after the bend test to enable this examination to be c
62、arried out.
Figure 1— Bend deflection f
6.4.2 Bend deflection acceptance criteria
On completion of the bend test the requirements of 5.4.3 shall be met.
7 Marking
Marking shall be as specified in EN 818-1. The grade mark
63、for the chain shall be “4”.
8 Manufacturer’s certificate
The manufacturer’s certificate shall be as specified in EN 818-1.
9 Instructions for use
Instructions for use shall accompany the chain and shall be in accordance with the relevant clauses of prEN 818-6.
Annex A (informative)
64、
Calculation of dimensions, working load limits and mechanical properties
A.1 Dimensions and tolerances
A.1.1 In Table 2, column 2, the tolerances on material diameters are based on:
a) ±4 % of the nominal size of chain for nominal sizes less than 18 mm;
b) ±5 % of the nominal size of
65、chain for nominal sizes of 18 mm and over, values being rounded to 0,1 mm.
A.1.2 The bases for calculation of dimensions in Table 2, columns 3 to 7, are as follows:
Maximum diameter at the weld
ds max.
= 1,1dn
Nominal pitch
pn
= 3dn
Minimum pitch of chain pmin = 2,91dn
Maximum pitch o
66、f chain pmax = 3,09dn
Minimum internal width away from the weld
w1
= 1,3dn
Maximum external width over the weld
w2
= 3,7dn
The dimensions given in Table 2 are full calculated values rounded to 0,1 mm for values up to 100 mm. Values equal to or greater than 100 mm are rounded to 1 mm.
A.2 Working load limits and mechanical properties
A.2.1 General
The stresses used in the calculation of working load limits and mechanical properties in the formulae given in A.2.2 to A.2.4 are me
bs英國標(biāo)準(zhǔn)】bs en 81831999 升降用的短節(jié)鏈條.安全.吊鏈用中等公差鏈條.4級
