SANS 813-2008 Clamps for wire ropes《钢丝绳用夹钳》.pdf

1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA

2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any

3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 978-0-626-21839-3 SANS 813:2008Edition 3.2SOUTH AFRICAN NATIONAL STANDARD Clamps for wire ropes Published by SABS Standards Division Bag X191 Pretor

4、ia 00011 Dr Lategan Road Groenkloof Private 11 fax: +27 12 344 1568 Tel: +27 12 428 79s.co.zawww.sab SABS 2008 SANS 813:dition 3.2 ETable of changes Change No. Date Scope Amdt 1 2005 Amended to change the designation of SABS standards to SANS standards, to update referenced standards, to change the

5、definition for “acceptable“, and to change the marking requirements for clamps. Amdt 2 2008 Amended to update the introductory paragraph to the normative references clause, and to delete a referenced standard. Foreword This South African standard was approved by National Committee SABS TC 1020, Lift

6、ing equipment, in accordance with procedures of the SABS Standards Division, in compliance with nnex 3 of the WTO/TBT agreement. aThis document was published in August 2008. This document supersedes SANS 813:2005 edition 3.1). (A vertical line in the margin shows where the text has been technically

7、modified by amendment o. 2. Nnnexes A and B form an integral part of this document. Annexes C and D are for information only. ASANS 813:2008 Edition 3.2 1 Contents Page Foreword 1 Scope . 3 2 Normative references. 3 3 Definitions 4 4 Requirements. 5 5 Packing and marking . 9 6 Sampling and complianc

8、e with the standard . 10 7 Inspection and methods of test 10 7.1 Inspection 10 7.2 Test for thickness of galvanized coatings . 10 7.3 Testing joints for effectiveness of clamps . 10 Annex A (normative) Method of fitting clamps in conjunction with thimbles 12 Annex B (normative) Notes to purchasers.

9、12 Annex C (informative) Hardness conversions for steel and approximate equivalent tensile strength 13 Annex D (informative) Quality verification of clamps. 16 Bibliography. 16 SANS 813:2008 Edition 3.2 2 This page is intentionally left blank SANS 813:2008 Edition 3.2 3 Clamps for wire ropes 1 Scope

10、 This standard specifies the requirements for clamps for wire ropes for producing temporary rope terminations, where these terminations are subject to safety requirements, i.e. where failure of the rope termination could endanger persons. WARNING Clamps for wire ropes manufactured in accordance with

11、 this standard shall not be used with hoist ropes in mines, in rope drives for cranes in steel works and rolling mills or for permanent fastenings of ropes in other rope drives, elevator, personnel hoisting and scaffolding applications. Nor shall they be used for rope terminations for load suspensio

12、n devices in the operation of lifting appliances, except in the case of lifting tackle where these devices are produced for a special application and the rope is not reused. This standard includes permanent terminations for counterweights for conveyor systems or stays. 2 Normative references The fol

13、lowing referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. Information on currently valid national and internationa

14、l standards can be obtained from the SABS Standards Division. Amdt 2 ASTM A 143, Standard practice for safeguarding against embrittlement of hot-dip galvanized structural steel products and procedure for detecting embrittlement. BS 6001 (all parts), Sampling procedures for inspection by attributes.

15、BS 6002 (all parts), Sampling procedures for inspection by variables. EN 1562, Founding Malleable cast irons. EN 10243-1, Steel die forgings Tolerances on dimensions Part 1: Drop and vertical press forgings. EN 10243-2, Steel die forgings Tolerances on dimensions Part 2: Upset forgings made on horiz

16、ontal forging machines. Amdt 1 ISO 68-2, ISO general-purpose screw threads Basic profile Part 2: Inch screw threads. ISO 7500-1, Metallic materials Verification of static uniaxial testing machines Part 1: Tension/ compression testing machines Verification and calibration of the force-measuring syste

17、m. SANS 32/EN 10240, Internal and/or external protective coatings for steel tubes Specification for hot dip galvanized coatings applied in automatic plants. SANS 813:2008 Edition 3.2 4 SANS 121/ISO 1461, Hot dip galvanized coatings on fabricated iron and steel articles Specifications and test method

18、s. SANS 936 (SABS 936), Spheroidal graphite iron castings. SANS 1700-2-10/ISO 263, Fasteners Part 2: Screw threads Section 10: ISO inch screw threads General plan and selection for screws, bolts and nuts Diameter range 0,06 to 6 in. SANS 1700-2-12/ISO 5864, Fasteners Part 2: Screw threads Section 12

19、: ISO inch screw threads Allowances and tolerances. SANS 1700-5-11/ISO 4042, Fasteners Part 5: General requirements and mechanical properties Section 11: Electroplated coatings. SANS 1700-14-1/ISO 4032, Fasteners Part 14: Hexagon nuts Section 1: Hexagon nuts, style 1 Product grades A and B. SANS 170

20、0-14-2/ISO 4033, Fasteners Part 14: Hexagon nuts Section 2: Hexagon nuts, style 2 Product grades A and B. SANS 1700-14-3/ISO 4034, Fasteners Part 14: Hexagon nuts Section 3: Hexagon nuts Product grade C. 3 Definitions For the purposes of this standard, the following definitions apply: 3.1 acceptable

21、 acceptable to the authority administering this standard or to the parties concluding the purchase contract, as relevant Amdt 1 3.2 clamp grip mechanical device consisting of a grooved saddle with U-bolts or two saddles with bolts and nuts. The clamp is designed to hold two ropes together 3.3 grade

22、clamps shall be graded according to the ultimate tensile strength: for example, 4 for commercial grade clamps and 6 for higher grade clamps 3.4 live end/dead end that part of the rope attached directly to the load is referred to as the “live end“. Conversely, the other end is referred to as the “dea

23、d end“ 3.5 nominal size nominal diameter of the wire rope for which the clamp is intended 3.6 rope joint rope joint consists of one live end and one dead end (see 3.4 and figure 2) SANS 813:2008 Edition 3.2 5 4 Requirements 4.1 General This standard is intended for metric sized wire rope clamps. Whe

24、re, however, non-metric sized nuts and U-bolts are used, the screw threads shall comply with the applicable requirements of SANS 1700-2-10, SANS 1700-2-12 and ISO 68-2. Amdt 2Calculations for the required tightening torque and joint test force shall be based on the appropriate SANS standard. 4.2 Bod

25、ies 4.2.1 General The dimensions of the saddle base and crest of the body shall be in accordance with columns 4 and 5 of tables 1 and 2 (see also figure 1). The flare of the saddle shall be not less than 15 to the vertical. 4.2.2 Materials 4.2.2.1 Commercial grade bodies Commercial grade bodies shal

26、l be made from one of the following materials, as required (see annex B): a) Drop forgings forged solid, without welds, in accordance with EN 10243-1 and EN 10243-2, from steel having the following physical requirements: Amdt 1Maximum Brinell number = 123 Maximum Vickers hardness = 128 Maximum Rockw

27、ell C hardness = 70 Minimum tensile strength = 430 MPa Minimum yield strength = 280 MPa Minimum elongation on a gauge length of 5,65 S0= 22 %, where S0is the cross-sectional area; NOTE See table C.1 for converting tensile strength to hardness. b) Whiteheart malleable iron castings complying with the

28、 requirements of EN 1562; c) Blackheart malleable iron castings complying with the requirements of EN 1562; and d) Iron castings with spheroidal or nodular graphite complying with the requirements for grade SG 38 or SG 42 of SANS 936. SANS 813:2008 Edition 3.2 6 4.2.2.2 Higher grade bodies Higher gr

29、ade bodies shall be drop forgings forged solid, without welds, in accordance with EN 10243-1 and EN 10243-2, from steel having the following physical requirements: Amdt 1 a) Maximum Brinell number = 179; b) Maximum Vickers hardness = 184; c) Maximum Rockwell C hardness = 90; d) Minimum tensile stren

30、gth = 600 MPa; e) Minimum yield strength = 400 MPa; and f) Minimum elongation on a gauge length of 5,65 S0= 17 %, where S0is the cross-sectional area. NOTE See table C.1 for converting tensile strength to hardness. 4.2.3 Rope grooves Unless otherwise specified by the purchaser (see annex B), bodies

31、shall be grooved for round strand wire rope of right-hand lay having six strands. 4.3 U-bolts, bolts and nuts 4.3.1 U-bolts and bolts The nominal diameter of commercial grade clamps shall be as given in column 2 of table 1, appropriate to the nominal size of the clamp, as given in column 1, and as r

32、equired by the purchaser (see annex B). The nominal diameter of higher grade clamps shall be as given in column 2 of table 2, appropriate to the nominal size of the clamp, as given in column 1, and as required by the purchaser (see annex B). U-bolts and bolts shall have a minimum tensile strength co

33、rresponding to grade 6.8 of SANS 1700-511. Shanks with a diameter less than the nominal outside diameter of the thread shall not be acceptable. SANS 813:2008 Edition 3.2 7 Table 1 Forces and number of clamps required per joint for commercial grade clamps 1 2 3 4 5 6 7 8 9 Nominal size of clamp Nomin

34、al diameter of clamp and rope Nominal diameter of bolt Height of the saddle base h1Height of the crest of the body h2Required tightening torquea bRope breaking force Joint test force Required number of clamps in jointcmm mm mm mm Nm kN kN 5,0 6,5 8,0 5,0 6,5 8,0 M5 M6 M8 5,0 6,0 8,5 13,0 14,0 18,0 2

35、,0 3,5 6,0 14,8 21,6 38,3 4,93 7,20 12,77 3 3 4 10,0 13,0 16,0 10,0 13,0 16,0 M8 M12 M14 9,0 13,0 16,0 21,0 29,0 35,0 9,0 33,0 49,0 61,2 102,6 154,3 20,40 34,20 51,43 4 4 4 19,0 22,0 26,0 19,0 22,0 26,0 M14 M16 M20 17,0 20,0 22,0 40,0 44,0 51,0 67,7 107,0 147,0 223,9 297,4 406,3 74,63 99,13 135,43 4

36、 5 5 30,0 34,0 40,0 30,0 34,0 40,0 M20 M22 M24 27,0 30,0 33,0 59,0 67,0 77,0 212,0 296,0 363,0 557,0 713,2 973,5 185,67 237,73 324,50 6 6 6 aThe tightening torques given apply to the threads and bearing surfaces of the nuts after having been greased. bThe tightening torque shall not exceed 80 % of t

37、he minimum yield strength of the material. cThe number of clamps applies to the dead end of the rope. Table 2 Forces and number of clamps required per joint for higher grade clamps 1 2 3 4 5 6 7 8 9 Nominal size of clamp Nominal diameter of clamp and rope Nominal diameter of bolt Height of the saddl

38、e base h1Height of the crest of the body h2Required tightening torquea bRope breaking force Joint test force Required number of clamps in jointcmm mm mm mm Nm kN kN 6 6 8 3 4 5 6 7 M6 M6 M8 5,0 6,0 8,5 13,0 14,0 18,0 6,1 10,2 20,3 5,2 14,8 21,6 1,73 4,93 7,20 2 2 2 10 11 13 8 9 10 11 12 M10 M11 M13

39、9,0 13,0 16,0 21,0 29,0 35,0 40,7 61,0 88,0 38,3 61,2 86,2 12,77 20,40 28,73 2 2 2 13 14 14 13 14 15 16 M13 M14 M14 17,0 20,0 22,0 40,0 44,0 51,0 88,0 129,0 129,0 102,6 137,6 154,3 34,20 45,87 51,43 3 3 3 16 19 19 18 20 22 24 26 M16 M20 M20 27,0 30,0 33,0 59,0 67,0 77,0 176,0 305,0 305,0 248,3 297,4

40、 406,3 82,77 99,13 135,43 4 4 5 19 22 22 28 30 32 34 36 M20 M22 M22 305,0 488,0 488,0 557,0 713,2 779,2 185,67 237,73 259,73 6 7 7 22 25 29 38 40 41 42 44 46 M22 M25 M29 488,0 583,0 800,0 973,5 1 086,9 1 419,4 324,50 362,30 473,13 8 8 8 32 32 32 48 52 56 58 62 65 M32 M32 M32 1 017,0 1 017,0 1 017,0

41、1 628,6 2 148,0 2 673,2 542,87 716,00 891,07 8 8 9 32 38 38 68 73 75 78 85 90 M32 M38 M38 1 017,0 1 627,0 1 627,0 3 571,0 3 496,5 5 149,4 1 190,33 1 165,50 1 716,47 10 10 12 aThe tightening torques given apply to the threads and bearing surfaces of the nuts after having been greased. bThe tightening

42、 torque shall not exceed 80 % of the minimum yield strength of the material. cThe number of clamps applies to the dead end of the rope. SANS 813:2008 Edition 3.2 8 4.3.2 Nuts Nuts shall be hexagon nuts complying with the relevant requirements of SANS 1700-14-1, SANS 1700-14-2 and SANS 1700-14-3. 4.4

43、 Screw threads Screw threads shall comply with the requirements for coarse metric thread, having a class 7 H (free fit) tolerance in the case of nuts, and a class 8 g (free fit) tolerance in the case of U-bolts and bolts. Screw threads may be cut or rolled. The distance of the thread run-out from th

44、e centre line of the U-bolt shall be between 0,5 d and 0,6 d (see figure 1). NOTE In the cases of galvanized and sherardized screw threads, special attention is drawn to the relevant information given in SANS 32 and SANS 1700-5-11. 4.5 Design The design of the clamps shall not be restricted by the i

45、llustration given in figure 1, which is only intended to clarify the text. 4.6 Finish 4.6.1 General Bodies shall be neatly forged, and U-bolts, bolts and nuts shall be neatly formed. All parts shall be free from roughness and sharp edges. 4.6.2 Coatings Unless one of the following coatings is specif

46、ied by the purchaser (see annex B), clamps and bolts shall be supplied uncoated: a) Hot-dip galvanized coatings which comply with the relevant requirements of SANS 32. When checked in accordance with ASTM A 143, hot-dip galvanized clamps and bolts shall show no hydrogen embrittlement. b) Hot-dip gal

47、vanized coatings which comply with the relevant requirements of SANS 121. c) Sherardized coatings which comply with the requirements of SANS 121. 4.7 Effectiveness of clamps When tested in accordance with 7.3, the rope shall not slip in the clamps and the clamps shall not be damaged in any way. SANS

48、 813:2008 Edition 3.2 9 Figure 1 Typical clamp 5 Packing and marking 5.1 Packing Clamps shall be packed in an acceptable manner that will prevent damage during transport, storage and handling. Only clamps of the same design, size, material, and finish shall be packed together in the same container.

49、Clamps of grade 6 shall be packed individually. 5.2 Marking 5.2.1 On clamps The following details shall be marked legibly (e.g. by means of embossing) on the clamps. Amdt 1 a) the name, trade name or trademark of the manufacturer; b) the nominal size; SANS 813:2008 Edition 3.2 10 c) the grade (e.g. 4 or 6) (see 3.3); and d) a traceability identification code or batch number. 5.2.2 On packages Each package containing clamps shall bear t