Steel wire ropes for lifts
1 Scope
This document specifies the classification and designation, ordering information, technical requirements, verification requirements and test methods, sampling and acceptance rules, as well as operating instructions and markings of steel wire ropes, with different structures with nominal diameters from 6 mm to 38 mm, for carbon steel smooth or coated lifts.
This document is applicable to the suspended steel wire ropes for traction drive, hydraulic drive and forced drive lifts, and also applicable to the compensation steel wire ropes and governor steel wire ropes for passenger lifts, cargo lifts and utility lifts running between guide rails.
2 Normative references
The following documents contain requirements which, through reference in this text, constitute provisions 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.
GB/T 228.1 Metallic materials - Tensile testing - Part 1: Method of test at room temperature
GB/T 238 Metallic materials - Wire - Reverse bend test
GB/T 1839 Test method for gravimetric determination of the mass per unit area of galvanized coatings on steel products
GB/T 2104 Steel wire ropes - Packing, marking and certificate - General requirements
GB/T 8358 Steel wire ropes - Determination of breaking force
GB/T 8706 Steel wire ropes - Vocabulary, designation and classification
GB/T 15030 Sisal main cores in steel wire ropes
GB/T 21965 Steel wire ropes - Vocabulary for acceptance and defect
NB/SH/T 0387 Wire rope greases
YB/T 081 Rule for rounding off of numberical values and judgement of testing values for technical standards of metallurgy
YB/T 4182 Steel wire ropes - Determination of lubricant content
YB/T 4452-2015 Fibre cores for steel wire ropes
YB/T 5198 Steel wire for lift ropes
YB/T 5343 Steel wire for ropes
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 8706 and the following apply.
3.1
single tensile rope
steel wire rope with outer wire and inner wire of the outer strand have the same tensile strength class (except for center wire and filled wire)
3.2
dual tensile rope
steel wire rope with outer wire and inner wire of the outer strand have different tensile strength class (except for center wire and filled wire)
Example: Class 1370/1770, whose outer strand has an outer steel wire tensile strength class of 1370 and the inner steel wire tensile strength class of 1770.
3.3
steel-based composite core (SCC)
a rope core made of steel wire combined with fiber or polymer
3.4
composite steel core (CSC)
a type of steel composite core, a rope core composed of a wire strand and a fiber or polymer core
4 Classification and designation
The classification and designation of steel wire ropes shall meet the requirements of GB/T 8706.
Contents
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Classification and designation
5 Ordering information
6 Technical requirements
7 Verification requirements and test methods
8 Sampling and acceptance rules
9 Operating instructions and markings
Annex A (Normative) Table of minimum breaking force values of steel wire ropes for ordinary classes, diameters and tensile strength classes
Annex B (Normative) Calculation of minimum breaking force of steel wire ropes
Annex C (Informative) Reference weight per unit length, nominal metal cross-sectional area of steel wire ropes and approximate diameter of outer wire
Annex D (Normative) Method for determination of elongation of steel wire ropes
Annex E (Informative) Information on selection, storage, transportation, installation and maintenance of steel wire ropes for lifts
Annex F (Informative) Replacement and scrap conditions of steel wire ropes for lifts
