Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
This standard is not equivalent to "Steel Wire Ropes - Vocabulary" (ISO 2532:1974).
This standard replaces the "Acceptance" (Chapter 4) and "Defects" (Chapter 5) of "Steel Wire Ropes - Terminology" (GB/T 8706-1988).
Compared with the "Acceptance" (Chapter 4) and "Defects" (Chapter 5) of GB/T 8706-1988, the main changes of this standard are as follows:
- The terms "random sample taking", "chemistry analysis", "microstructural defect" and "roundness" are respectively changed to "random sampling", "chemical analysis", "micro defect" and "out-of-roundness";
- The terms "periodic sampling", "online sampling", "groove or bulge" and "surficial spalling" are deleted;
- The term "low torsional stresses" is added; the "method of casting" and "method of pressing pipe" are added in the tensile test of steel wire ropes;
- The definition of "batch" is modified;
- The terms "extruding of steel wire rope corn", "extruding of steel wire", "kinking", "flattening of parts", "local decrease in diameter", "local increase in diameter", "flexing", "corrosion", "local aggregation of broken wire" and "decrease of elasticity" are added;
- The "vocabulary index" is added.
This standard was proposed by the China Iron and Steel Association.
This standard is under the jurisdiction of National Technical Committee on Iron and Steel of Standardization Administration of China.
Drafting organizations of this standard: National Quality Supervision and Inspection Center for Metal Products, Guizhou Wire Rope Incorporated Company, Jiangsu Langshan Wirerope Co., Ltd. and China Metallurgical Information and Standardization Institute.
Chief drafting staff of this standard: Hong Tao, Heng Junhua, Yang Hongying, Deng Haiyan, Wang Lingjun and Dai Shifeng.
The previous edition of the standard replaced by this standard:
- GB/T 8706-1988.
Steel Wire Ropes - Vocabulary for Acceptance and Defect
钢丝绳 验收及缺陷术语
1 Scope
This standard specifies the common terms for acceptance and defects of steel wire ropes during their production and services.
This standard is applicable to the general requirements for acceptance and defects of steel wire ropes. Where other provisions are stated in the product standard, the provisions shall prevail.
2 Acceptance Terms
2.1
Sampling
2.1.1
Acceptance
The sampling and inspection judgment procedure for inspecting individual or batch of products according to the requirements of relevant standards and specifications.
2.1.2
Rejection
The demander rejects to accept the products not conforming to relevant standards and specifications.
2.1.3
Batch
The total amount of unit products which are delivered for acceptance simultaneously with the same construction, specification, nominal tensile strength grade and surface state.
2.1.4
Sample
2.1.4.1
Size of sample
2.1.4.2
Sample of wire
2.1.4.3
Sample of rope
2.1.4.4
Sample of core
2.1.5
Sampling inspection
According to statistical sampling technique, the process to deduce the total quality of a batch of products by inspecting part of unit products taken from the batch.
2.1.6
100% inspection
The inspection for all delivered and accepted unit products.
2.1.7
Random sampling
The sampling method for which the unit products are casually sampled from inspection batch.
2.1.8
Primary test
2.1.9
Repeat test
Where a product is judged as unqualified in primary test, its defective item shall be retested according to the method and quantity specified in standard.
2.2
Inspection of Steel Wires
2.2.1
Sample
2.2.1.1
Origin
The samples originate from steel wire rope.
2.2.1.2
Straightening
In order to facilitate the test and guarantee its accuracy, the sample is straightened by hands or tools without damaging sample surface or affecting its mechanical performance.
2.2.2
Chemical analysis
2.2.2.1
Product analysis
The chemical analysis carried out for the samples extracted from steel wire ropes.
2.2.2.2
Permissible percentage limits for elements
2.2.2.3
Permissible tolerances for product analysis
2.2.3
Micrographic inspection
2.2.3.1
Microstructure
2.2.3.2
Heterogeneity
2.2.3.3
Inclusions
2.2.3.4
Band structure
2.2.3.5
Surface decarburization
2.2.3.6
Martensite
2.2.3.7
Cracks or fissures
2.2.3.8
Shells
2.2.3.9
Segregation
2.2.4
Dimensional inspection
The determination for cross sectional dimension of circular or profiled wire.
2.2.5
Tensile test
The test to determine the tensile strength and percentage elongation of steel wire under unidirectional static tension.
2.2.5.1
Gauge length
2.2.5.2
Minimum duration of test
2.2.5.3
Speed of test
2.2.5.4
Tensile strength
The ratio between the maximum resistance to fracture and the original cross-sectional area of sample where the steel wire is under unidirectional static tension.
2.2.5.5
Knotting force
The maximum force of knotted sample which is under unidirectional static tension.
2.2.5.6
Ratio of knotting tension
The percentage of the breaking forces for knotting and unknotting of steel wire.
2.2.5.7
Percentage elongation
The percentage of the increased length of gauge length and its original value after the tensile failure of sample.
2.2.6
Reverse bend test
The test to inspect steel wire's ability to bear plastic deformation (fasten one end of steel wire, bend it for 90° around the cylindrical support with specific radius and then bend it in opposite direction).
Foreword I
1 Scope
2 Acceptance Terms
3 Defect Terms
Chinese Index
English Index
Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
This standard is not equivalent to "Steel Wire Ropes - Vocabulary" (ISO 2532:1974).
This standard replaces the "Acceptance" (Chapter 4) and "Defects" (Chapter 5) of "Steel Wire Ropes - Terminology" (GB/T 8706-1988).
Compared with the "Acceptance" (Chapter 4) and "Defects" (Chapter 5) of GB/T 8706-1988, the main changes of this standard are as follows:
- The terms "random sample taking", "chemistry analysis", "microstructural defect" and "roundness" are respectively changed to "random sampling", "chemical analysis", "micro defect" and "out-of-roundness";
- The terms "periodic sampling", "online sampling", "groove or bulge" and "surficial spalling" are deleted;
- The term "low torsional stresses" is added; the "method of casting" and "method of pressing pipe" are added in the tensile test of steel wire ropes;
- The definition of "batch" is modified;
- The terms "extruding of steel wire rope corn", "extruding of steel wire", "kinking", "flattening of parts", "local decrease in diameter", "local increase in diameter", "flexing", "corrosion", "local aggregation of broken wire" and "decrease of elasticity" are added;
- The "vocabulary index" is added.
This standard was proposed by the China Iron and Steel Association.
This standard is under the jurisdiction of National Technical Committee on Iron and Steel of Standardization Administration of China.
Drafting organizations of this standard: National Quality Supervision and Inspection Center for Metal Products, Guizhou Wire Rope Incorporated Company, Jiangsu Langshan Wirerope Co., Ltd. and China Metallurgical Information and Standardization Institute.
Chief drafting staff of this standard: Hong Tao, Heng Junhua, Yang Hongying, Deng Haiyan, Wang Lingjun and Dai Shifeng.
The previous edition of the standard replaced by this standard:
- GB/T 8706-1988.
Steel Wire Ropes - Vocabulary for Acceptance and Defect
钢丝绳 验收及缺陷术语
1 Scope
This standard specifies the common terms for acceptance and defects of steel wire ropes during their production and services.
This standard is applicable to the general requirements for acceptance and defects of steel wire ropes. Where other provisions are stated in the product standard, the provisions shall prevail.
2 Acceptance Terms
2.1
Sampling
2.1.1
Acceptance
The sampling and inspection judgment procedure for inspecting individual or batch of products according to the requirements of relevant standards and specifications.
2.1.2
Rejection
The demander rejects to accept the products not conforming to relevant standards and specifications.
2.1.3
Batch
The total amount of unit products which are delivered for acceptance simultaneously with the same construction, specification, nominal tensile strength grade and surface state.
2.1.4
Sample
2.1.4.1
Size of sample
2.1.4.2
Sample of wire
2.1.4.3
Sample of rope
2.1.4.4
Sample of core
2.1.5
Sampling inspection
According to statistical sampling technique, the process to deduce the total quality of a batch of products by inspecting part of unit products taken from the batch.
2.1.6
100% inspection
The inspection for all delivered and accepted unit products.
2.1.7
Random sampling
The sampling method for which the unit products are casually sampled from inspection batch.
2.1.8
Primary test
2.1.9
Repeat test
Where a product is judged as unqualified in primary test, its defective item shall be retested according to the method and quantity specified in standard.
2.2
Inspection of Steel Wires
2.2.1
Sample
2.2.1.1
Origin
The samples originate from steel wire rope.
2.2.1.2
Straightening
In order to facilitate the test and guarantee its accuracy, the sample is straightened by hands or tools without damaging sample surface or affecting its mechanical performance.
2.2.2
Chemical analysis
2.2.2.1
Product analysis
The chemical analysis carried out for the samples extracted from steel wire ropes.
2.2.2.2
Permissible percentage limits for elements
2.2.2.3
Permissible tolerances for product analysis
2.2.3
Micrographic inspection
2.2.3.1
Microstructure
2.2.3.2
Heterogeneity
2.2.3.3
Inclusions
2.2.3.4
Band structure
2.2.3.5
Surface decarburization
2.2.3.6
Martensite
2.2.3.7
Cracks or fissures
2.2.3.8
Shells
2.2.3.9
Segregation
2.2.4
Dimensional inspection
The determination for cross sectional dimension of circular or profiled wire.
2.2.5
Tensile test
The test to determine the tensile strength and percentage elongation of steel wire under unidirectional static tension.
2.2.5.1
Gauge length
2.2.5.2
Minimum duration of test
2.2.5.3
Speed of test
2.2.5.4
Tensile strength
The ratio between the maximum resistance to fracture and the original cross-sectional area of sample where the steel wire is under unidirectional static tension.
2.2.5.5
Knotting force
The maximum force of knotted sample which is under unidirectional static tension.
2.2.5.6
Ratio of knotting tension
The percentage of the breaking forces for knotting and unknotting of steel wire.
2.2.5.7
Percentage elongation
The percentage of the increased length of gauge length and its original value after the tensile failure of sample.
2.2.6
Reverse bend test
The test to inspect steel wire's ability to bear plastic deformation (fasten one end of steel wire, bend it for 90° around the cylindrical support with specific radius and then bend it in opposite direction).
Contents of GB/T 21965-2008
Foreword I
1 Scope
2 Acceptance Terms
3 Defect Terms
Chinese Index
English Index
