G4-15

(reaffirmed 2020)

Steel wire rope for general purpose and for mine hoisting and mine haulage

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  Standards Update Service

  G4-15

  October 2015

  
  

  Title: Steel wire rope for general purpose and for mine hoisting and mine haulage

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  G4-15

  Steel wire rope for general purpose and for mine hoisting and mine haulage

  
  

  
  

  
  

  ®A trademark of the Canadian Standards Association, operating as “CSA Group”

  
  

  Published in October 2015 by CSA Group A not-for-profit private sector organization

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  ISBN 978-1-4883-0001-1

  
  

  © 2015 Canadian Standards Association

  All rights reserved. No part of this publication may be reproduced in any form whatsoever without the prior permission of the publisher.

  Contents

  Technical Committee on Wire Rope 4

  
  

  Preface 6

  
  

  1. Scope 8

     
     

  2. Reference publications 9

     
     

  3. Definitions 9

     
     

  4. Materials 11

     1. Wire 11

        1. Steel making practice 11

        2. Type of zinc 11

        3. Grades and finishes 11

     2. Fibre cores 12

     3. Wire rope lay up lubricant 12

        
        

  5. Mechanical requirements of raw materials 12

     1. Wire 12

     2. Fibre cores 13

        
        

  6. Steel cores 13

     1. General 13

     2. Independent wire rope cores 13

     3. Strand cores 13

     4. Special cores 13

        
        

  7. Mechanical and dimensional requirements of finished rope 13

     1. General 13

        1. Breaking load 14

        2. Diameter tolerance 14

     2. Construction, mass (weight), and breaking loads of round strand ropes 14

        1. 6 × 7 classification 14

        2. 6 × 19 classification 14

        3. 6 × 37 classification 14

        4. 6 × 61 classification 14

        5. 8 × 19 classification 14

        6. Nonrotating classification 15

     3. Flattened strand rope 15

        1. 6 × 8 flattened strand classification 15

        2. 6 × 25 flattened strand classification 15

        3. 6 × 16/6 × 8 and 6 × 16/6 × 10 nonrotating flattened strand classification 15

     4. Locked coil rope 15

        1. Full locked coil hoisting rope 15

        2. Half locked coil guide and rubbing rope 15

     5. Nonrotating compacted 18 and 34 strand classification 15

     6. Rope pitch 15

     7. Lubrication 16

        1. Fibre core 16

        2. Independent wire rope core 16

        3. Bright rope 16

        4. Galvanized rope 16

           
           

  8. Rope length measurement 16

     
     

  9. Marking 17

     
     

  10. Quality assurance for the manufacturer 17

      1. General 17

      2. Quality control program 17

      3. Quality audits 17

         
         

  11. Sampling procedures 17

      1. Sampling procedure for wire prior to fabrication into a rope 17

      2. Sampling procedure for fibre core 17

      3. Sampling procedure for completed ropes 17

         
         

  12. Test procedures 18

      1. Tension test on individual wires (bright, galvanized at finished size, and drawn galvanized wire) 18

      2. Torsion test on individual wires (bright and drawn galvanized wire) 18

      3. Diameter tolerance and roundness tests on individual wires 19

      4. Test for mass (weight) of zinc coating on individual wires (galvanized at finished size and drawn galvanized) 19

      5. Ductility and adherence tests (galvanized at finished size wires) 19

      6. Test for preservative in natural fibre cores 20

      7. Diameter measurement on the completed rope 20

      8. Out-of-roundness measurement on the completed rope 21

      9. Breaking load test on the completed rope 21

         1. Ropes excluded from in-service destructive testing 21

         2. Ropes subject to in-service destructive testing 21

            
            

  13. Certification for general purpose rope 21

      1. Manufacturer’s Certificate of Compliance 21

      2. Test certificate 22

         
         

  14. Information supplied by the purchaser 22

      
      

  15. Wire and wire rope subject to in-service destructive testing for mine hoisting and mine haulage applications 23

      1. General 23

      2. Manufacturer’s Certificate of Compliance 23

      3. Sampling procedures for completed ropes 24

         1. Sampling procedures for new ropes at the manufacturer’s plant 24

         2. Sampling procedures at the mine site 25

      4. Rope test procedures at the laboratory 26

         1. Receiving 26

         2. Initial sample preparation 26

         3. Rope sample preparation — 2083 mm (82 in) sample 27

         4. Breaking load test on the rope sample 27

         5. Torsion test on individual wires 28

         6. Visual examination 29

      5. Rope testing machine — Calibration 29

      6. Wire Rope Test Certificate 30

         1. General 30

         2. Test certificate headings 30

         3. Visual examination and measurements 30

         4. Test results 30

         5. Condition 31

         6. Statement of compliance and verification 31

         7. Notification 31

      7. Quality assurance at the testing laboratory 31

         1. General 31

         2. Quality control program 31

         3. Quality audits 32

      8. Rope evaluation 32

         1. Rope evaluation criteria 32

         2. Critical extension 32

      9. Laboratory approval — Proof of compliance 33

      10. Special considerations for high tensile wire ropes in shaft sinking applications 33

          1. Application 33

          2. Unused rope 33

          3. Testing requirements for unused rope sample 33

          4. Rope evaluation 33

          5. Invalid tests 34

  
  

  Annex A (informative) — Steel wire rope certificates 67

  Preface

  This is the eighth edition of CSA G4, Steel wire rope for general purpose and for mine hoisting and mine haulage. This edition combines and supersedes the requirements of the previous editions of the following:

• CSA G4, Steel wire rope for general purpose and for mine hoisting and mine haulage, published in 2009, 2000, and 1992;

• CSA G4-M, Steel wire rope for mine hoisting and haulage purposes, published in 1977;

• CSA G4, Steel wire rope for general purpose and for mine hoisting and for mine haulage, published in 1976;

• CSA G4, Steel wire rope: General purpose, published in 1967, 1958, and 1921; and

• CSA G18, Steel wire rope for mine hoisting and haulage purposes, published in 1965.

Changes to this edition include the following:

1. Clause 15.3.2.3: Seizing and/or clamping has been updated;

2. Clause 15.4.4.5: Test validation has been updated;

3. Clause 15.6.5: Condition requirement on the Test Certificate has been updated;

4. Clause 15.8.2: Critical extension has been added;

5. Clause 15.10: Special considerations for high-tensile wire ropes in shaft-sinking applications have been added;

6. Table 1: Tensile strength requirements for bright and galvanized wire have been updated;

7. Figure 1: Seizing requirements for 6 and 8 strand ropes have been updated;

8. Figure 2: Seizing requirements for rotation-resistant ropes have been updated; and

9. Figure 3: Seizing requirements for half and full locked coil ropes have been updated.

   To comply with current administrative requirements various Clauses throughout the Standard have been updated.

   
   

   CSA gratefully acknowledges the financial assistance provided by the Ontario Ministry of Labour in the development of this Standard.

   
   

   This Standard was prepared by the Technical Committee on Wire Rope, under the jurisdiction of the Strategic Steering Committee on Occupational Health and Safety.

   Notes:

   1. Use of the singular does not exclude the plural (and vice versa) when the sense allows.

   2. Although the intended primary application of this Standard is stated in its Scope, it is important to note that it remains the responsibility of the users of the Standard to judge its suitability for their particular purpose.

   3. This Standard was developed by consensus, which is defined by CSA Policy governing standardization — Code of good practice for standardization as “substantial agreement. Consensus implies much more than a simple majority, but not necessarily unanimity”. It is consistent with this definition that a member may be included in the Technical Committee list and yet not be in full agreement with all clauses of this Standard.

   4. To submit a request for interpretation of this Standard, please send the following information to inquiries@csagroup.org and include “Request for interpretation” in the subject line:

      1. define the problem, making reference to the specific clause, and, where appropriate, include an illustrative sketch;

      2. provide an explanation of circumstances surrounding the actual field condition; and

      3. where possible, phrase the request in such a way that a specific “yes” or “no” answer will address the issue.

         Committee interpretations are processed in accordance with the CSA Directives and guidelines governing standardization and are available on the Current Standards Activities page at standardsactivities.csa.ca.

   5. This Standard is subject to review within five years from the date of publication. Suggestions for its improvement will be referred to the appropriate committee. To submit a proposal for change, please send the following information to inquiries@csagroup.org and include “Proposal for change” in the subject line:

      1. Standard designation (number);

      2. relevant clause, table, and/or figure number;

      3. wording of the proposed change;

      4. rationale for the change.

G4-15

Steel wire rope for general purpose and for mine hoisting and mine haulage

1 Scope

1.1

This Standard covers mine hoisting, mine haulage, and ski-lift ropes, and ropes for general applications.

It includes requirements for raw materials and construction features for

1. round strand and flattened strand rope;

2. locked coil rope;

3. plastic impregnated and jacketed rope; and

4. compacted strand rope in bright and galvanized finish.

Note: Although Tables specifying physical properties for a number of the more common classifications of wire rope are provided in this Standard, this Standard is not limited to those specified and may be used to evaluate non- typical wire rope constructions within the wire rope grades specified in Clause 4.1.3.1.

1.2

The Standard also includes requirements for in-service destructive testing of steel wire ropes for mine hoisting applications.

1.3

This Standard is not intended for use in the manufacture and purchase of

1. aircraft cable;

2. elevator rope;

3. tiller rope;

4. swaged rope;

5. marlin-covered rope;

6. marine or shipping ropes;

7. bridge rope, and strand;

8. galvanized sash cord;

9. zinc-coated strand; or

10. galvanized guard rail cable.

1.4

The values given in SI units are the units of record for the purposes of this Standard. The values given in parentheses are for information and comparison only.

1.5

In this Standard, “shall” is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the standard; “should” is used to express a recommendation or that which is advised but not required; and “may” is used to express an option or that which is permissible within the limits of the Standard.