GB/T 33955-2017Steel wire ropes for mine hoisting (English PDF)

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1: Structure and drafting rules for standardization documents" Drafting is required.

This document replaces GB/T 33955-2017 "Wire rope for mine hoisting". Compared with GB/T 33955-2017, in addition to structural adjustments and in addition to editorial changes, the main technical changes are as follows.

a) Added a chapter on "Terms and Definitions" (see Chapter 3);

b) Deleted 17×7 in round strand wire rope structure, 4×V39FC, 4×V48FC, 6×V30, 6×Q19.6×V21FC, 6×Q33.6×V21FC and 6×K19W, 6×K25F, 6× K29F, 18×K19W, 15×K7, 16×K7 (see Table 1 of the 2017 edition);

c) Added round strand wire rope structures 6×46WS, 7×19S, 7×26WS, 7×31WS, 7×36WS, 7×41WS, 8× 26WS, 8×31WS, 8×36WS, 8×41WS, 24(W)×17S, 24(W)×19S, 35(W)×17S, 35(W)× 19S, special-shaped strand wire rope structure 6×V28SB and compacted strand wire rope structure 6×K46WS, 7×K19S, 7×K26WS, 7×K31WS, 7×K36WS, 7×K41WS, 8×K26WS, 8×K31WS, 8×K36WS, 8×K41WS, 24(W)×K7, 24(W)×K17S, 24(W)×K19S, 35(W)×K17S, 35(W)×K19S (see Table 1);

d) The diameter ranges of 29 structural steel wire ropes such as 6×7 and 6×19S have been changed (see Table 1, Table 1 of the 2017 edition);

e) The marking of 6×V25 type special-shaped strand wire rope has been changed (see Table 1, Table 1 of the 2017 edition);

f) The lubrication requirements and elongation requirements in the order content have been deleted (see Chapter 4 of the 2017 edition);

g) Added the requirements for the nominal tensile strength of steel wire used for different grades of steel wire ropes (see Table 3);

h) Added composite rope core types (see 6.2.1);

i) Changed the requirements for ordinary grease and friction-increasing grease for wire ropes (see 6.3, 5.3 of the 2017 edition);

j) The requirements for the diameter of wire ropes for butt welding and splicing have been changed (see 7.3, 6.2.3 of the 2017 edition);

k) The allowable deviation of the diameter of the compacted strand wire rope is changed to "0~ 5%d" (see Table 4, Table 3 of the 2017 edition);

l) The allowable deviation of the length of the steel wire rope with a nominal length of more than 1 500 m is increased (see Table 5);

m) The elongation requirement has been deleted (see 6.7 of the 2017 edition);

n) Deleted the weight factor and minimum breaking force factor of 4×V35N, 23×K7, 6×Q19.6×V21FC wire rope category (see

Table 5 of the 2017 edition);

o) Added weight coefficients and minimum breaking force coefficients of 13 types of wire ropes, including 7×19, 7×36, 8×K19 (see Table 6);

p) The weight coefficients of 13 wire rope categories, including 6×7, 6×V8, 18×K7, and 4 wire rope categories, including 6×K7, 35 (W)×K7, etc., have been changed.

Minimum breaking force coefficient of wire rope category (see Table 6, Table 5 of the 2017 edition);

q) The calculation formula for the minimum breaking force of steel wire [see formula (3), 2017 version of formula (3)] and the actual breaking force of steel wire have been changed.

Method for calculating the sum of forces (see 8.2.5, 7.1.5 of the 2017 edition);

r) Added technical requirements such as the allowable strength deviation of steel wire with a diameter less than 0.50 mm (see Table 7, Table 8 and Table 14);

s) Added technical requirements for knotting and stretching of steel wire with a diameter less than 0.50 mm (see 7.11.5);

t) Added the minimum repeated bending and minimum unidirectional torsion times of 2160 grade split wire (see Table 10 to Table 12);

u) The criteria for judging the eligibility of wire ropes have been changed (see 9.2, 9.3, and 8.2 of the 2017 edition);

v) The requirements for wire rope safety, use and maintenance have been changed (see Appendix D, Chapter 10 of the 2017 edition).

1 Scope

This document specifies the classification and marking, ordering content, materials, technical requirements, Inspection and test methods, qualification criteria, acceptance and arbitration, packaging, marking and quality certificates.

This document is applicable to round, special-shaped and compacted wire ropes for coal, metal, non-metal and other mine hoisting and supporting equipment.

This document does not apply to steel wire ropes for coal, metal, non-metallic and other mine balance and sealed steel wire ropes for shaft tankways.

2 Normative references

The contents of the following documents constitute the essential clauses of this document through normative references in this document.

For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to this document.

GB/T 228.1 Tensile test of metallic materials Part 1: Room temperature test method GB/T 238 Metallic wire repeated bending test method GB/T 239.1 Metallic wire Part 1: One-way torsion test method GB/T 1839 Test methods for quality of zinc coating on steel products GB/T 2104 General provisions for packaging, marking and quality certification of steel wire ropes GB/T 8358 Method for determination of breaking force of steel wire rope GB/T 8706 Terminology, marking and classification of wire ropes GB/T 15030 Sisal steel wire rope core GB/T 21965 Steel Wire Rope Acceptance and Defect Terminology GB/T 43357 Test methods for general properties of steel wire ropes AQ 1043 Mining Product Safety Signs and Labels MT/T 716 Technical conditions for acceptance of steel wire ropes for important purposes in coal mines NB/SH/T 0387-2023 Lubricants for wire ropes NB/SH/T 6019-2020 Friction hoist wire rope grease and maintenance oil YB/T 081 Rounding off of numerical values in metallurgical technical standards and determination of test values YB/T 4452-2015 Steel wire rope fiber core YB/T 5343-2015 Round steel wire for rope making

3 Terms and definitions

The terms and definitions defined in GB/T 8706 and the following apply to this document.

Composite core composite core; CC A composite steel wire rope core made of two or more materials such as steel wire (strand) and fiber or steel wire (strand) and solid polymer.