GB/T 9944-2015 PDF in English
GB/T 9944-2015 (GB/T9944-2015, GBT 9944-2015, GBT9944-2015)
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Name of Chinese Standard | Status |
| GB/T 9944-2015 | English | 125 |
Add to Cart
|
0-9 seconds. Auto-delivery.
|
Stainless steel wire ropes
| Valid |
| GB/T 9944-2002 | English | 439 |
Add to Cart
|
4 days
|
Stainless steel wire ropes
| Obsolete |
| GB/T 9944-1988 | English | 399 |
Add to Cart
|
3 days
|
Stainless steel wire ropes
| Obsolete |
Standards related to (historical): GB/T 9944-2015
PDF Preview
GB/T 9944-2015: PDF in English (GBT 9944-2015) GB/T 9944-2015
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.65
H 49
Replacing GB/T 9944-2002
Stainless Steel Wire Ropes
ISSUED ON. SEPTEMBER 11, 2015
IMPLEMENTED ON. JUNE 1, 2016
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative References ... 4
3 Terms and Definitions ... 4
4 Classification and Mark ... 4
5 Dimension and Weight ... 6
6 Technical Requirements ... 11
7 Test Methods ... 13
8 Inspection Rules ... 15
9 Package, Mark and Quality Certificate ... 15
Appendix A (Normative) Stainless Steel Wire Rope Structure Schematic
Diagram ... 17
Foreword
This Standard was drafted as per the rules specified in GB/T 1.1-2009.
This Standard replaced GB/T 9944-2002 Stainless Steel Wire Rope; compared with
GB/T 9944-2002, this Standard has the major technical changes as follows.
--- Add terms and definitions;
--- Add marking method of steel wire rope;
--- Expand the diameter range of steel wire rope;
--- Increase stainless steel wire rope with Grade of 06Cr17Ni12Mo2;
--- Improve the technical requirements for the elongation rate of steel wire rope for
the airplane operation;
--- Add the chemical composition analysis and test methods of major alloy elements;
--- Specify the precision requirements for the measurement of steel wire rope
diameter;
--- Adjust the inspection range on the straightness of steel wire rope.
This Standard was proposed by China Iron and Steel Industry Association.
This Standard shall be under the jurisdiction of National Technical Committee for
Standardization of Steel (SAC/TC 183).
Drafting organizations of this Standard. Sinosteel Zhengzhou Research Institute of
Steel Wire Products Co., Ltd., Jiangsu XiHu Special Steel Co., Ltd., Guizhou Steel
Wire Co., Ltd., Jiangsu Fasten Group Co., Ltd. Stainless Steel Product Branch,
Jiangsu Yasten Metal Products Co., Ltd., Jiangsu Xinglong Metal Products Co., Ltd.,
Guangdong Kinlong Hardware Products Co., Ltd., National Metal Products Quality
Supervision & Inspection Center, and China Metallurgical Information and
Standardization Institute.
Chief drafting staffs of this Standard. Cheng Peng, Chen Yan, Zhai Haiping, Li Huaibao,
Tian Weiqiang, Zhang Bao, Jiang Donghua, Zhang Pingping, Yang Aichun, Mu Donglu,
Liu Xiang, Liu Tingjun, Zhang Jie, Zhai Suping, Liu Jianchun, Jiang Hongjun, Zhou
Jiang, Li Min, Xu Qinhua, Ren Cuiying, and Wang Lingjun.
The historical editions replaced by this Standard are as follows.
--- GB/T 9944-1988, GB/T 9944-2002.
Stainless Steel Wire Ropes
1 Scope
This Standard specifies the requirements for classification, dimension and weight,
technical requirements, test methods, inspection rules, package, mark, and quality
certificate of stainless steel wire rope.
This Standard is applicable to corrosion-resisting stainless steel wire rope (hereinafter
referred to as steel wire rope) used for the instrument, mechanical transmission, inhaul
cable, suspension cable, and vibration damping of the vibration damper.
2 Normative References
The following documents are essential to the application of this document. For the
dated documents, only the versions with the dates indicated are applicable to this
document; for the undated documents, only the latest version (including all the
amendments) are applicable to this document.
GB/T 2104 Steel Wire Ropes – Packing, Marking and Certificate – General
Requirements
GB/T 4240 Stainless Steel Wires
GB/T 8358 Steel Wire Ropes – Determination of Measured Breaking Force
GB/T 8706 Steel Wire Ropes – Vocabulary, Designation and Classification
GB/T 12347-2008 Steel Wire Ropes – Bending Fatigue Testing
YB/T 4470 Standard Specification for Stainless Steel Wire Rope
3 Terms and Definitions
The terms and definition stipulated in GB/T 8706 are applicable to this document.
4 Classification and Mark
4.1 Classification
tolerance of it.
5.2.3 The steel wire rope length shall be indicated in the contract as per the
purchaser demand; otherwise determined by the supplier; however, the length of single
piece of steel wire rope shall be no shorter than 25m.
5.2.4 The steel wire rope shall be delivered as per the actual weight; while the steel
wire rope weight per 100m can refer to Table 3 and Table 4.
6 Technical Requirements
6.1 Raw materials
6.1.1 Steel-wire for manufacturing rope
6.1.1.1 The steel-wire for manufacturing rope shall conform to the provisions of
12Cr18Ni9, 06Cr19Ni10, 06Cr17Ni12Mo2 austenitic stainless steel stipulated in GB/T
4240 and YB/T 4470.
6.1.1.2 The tensile strength of the steel-wire for manufacturing rope shall make the
manufactured steel wire rope meet the requirements of minimum breaking force
stipulated in this Standard.
6.1.1.3 When the steel-wire for manufacturing rope is performed wrapping test before
the stranded rope, the steel-wire shall not break.
6.1.1.4 The surface of the steel-wire for manufacturing rope shall be free from the
defects that may influence the use, such as cracks, ribbed bar, and burr.
6.1.2 Steel wire rope core
The steel wire rope core is the metal rope core, which can be Wire Stranded Core
(WSC) or Independent Wire Rope Core (IWRC).
6.2 Twisting quality
6.2.1 Single-twist steel wire rope indicates twisting on the left; the twisting method for
1×19 upper layer and lower layer is opposite; the double-twist steel wire rope indicates
mutual twisting on the right. The steel wire ropes with other twisting method can also
be manufactured as per the purchaser demand.
6.2.2 The steel wire rope shall be twisted evenly, tightly, straightly, and non-loose;
each strand and steel-wire within the strand shall be twisted tightly; there shall be free
from the bump, fracture or staggering-cross of steel-wire.
6.2.3 Minimize the steel-wire joints in the steel wire rope, the distance between two
7.4 Diameter measurement
7.4.1 When the diameter of steel wire rope is less than or equal to 2mm, use the
wide-mouthed measuring instrument with precision no less than 0.01mm to measure;
when the diameter of steel wire rope is greater than 2mm, use the wide-mouthed
measuring instrument with precision no less than 0.02mm to measure. Its jaw width
shall be sufficient to cross the two adjacent strands, the measurement shall be
performed in the straight part of the steel wire rope in the absence of tension; on the
two cross-sections with distance of at least 1m, individually measure the diameter in
the two perpendicular directions on the same cross-section; the average value of the
four measurement results shall be regarded as the actually-measured diameter of the
steel wire rope.
7.4.2 The measurement method of non-roundness is the same as the provision of
7.4.1. The difference between maximum and minimum values measured on the same
cross-section shall conform to the provisions of 5.2.2
7.4.3 In the event of a dispute, the diameter measurement shall be performed in case
of exerting the tension about 5% minimum breaking force to the steel wire rope.
7.5 Non-loose inspection
Untie one end of the steel wire rope, so that there are two opposite strands with the
distance of two twist pitch; when the two strands are re-twisted into the steel wire rope,
they shall restore to the original position; however, the diameter of the steel wire rope
is allowed to be increased slightly.
7.6 Straightness inspection
If the diameter of steel wire rope is less than 6mm, it shall be performed straightness
inspection. In the absence of tension, place the 6m-long steel wire rope (not cutting
from the disk) on a plane located between two parallel straight lines with distance of
75mm; in addition to the 500mm-long end, the steel wire rope shall not be in contact
with any of the two parallel lines.
7.7 Tensile test
7.7.1 The steel wire rope breaking force test shall be performed as per the provisions
of GB/T 8358.
7.7.2 Elongation test. gradually loading specimen of steel wire rope to 60% minimum
breaking force of it, keep for 1min; after that release to 2% minimum breaking force.
Under the initial load, mark the length position of 250mm or no less than 100mm; then
gradually loading to 60% minimum breaking force of steel wire rope, measure the mark
length under such load; the ratio between the increased length of marking part and the
length of initial mark shall be the elongation rate of the steel wire rope.
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
|