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National Standard of the People's Republic of China
White sisal rope
This standard adopts ISO1181:1990 "Abaca rope and sisal rope - 1 Subject content and scope of application
This standard specifies the technical requirements, test methods and inspection rules for white hemp rope.
This standard applies to three-strand or four-strand white hemp rope made of sisal fiber. 2 Reference standards
GB8834 Determination of physical and mechanical properties of ropes 3 Product classification
3.1 White hemp rope is divided into two categories: Category A is three-strand; Category B is single-core four-strand. 3.2 Product marking is indicated by product name, type, nominal diameter, linear density and standard number. 3.3 The meaning of product marking is as follows:
Number of this standard
-Line density, ktex
Nominal diameter, mm
3.4 Marking example:
Three-strand white brown rope with a nominal diameter of 10mm is marked as: White brown rope A10-68GB8836
4 Technical requirements
4.1 Structure
-A, three-strand
-B, single rope core four-strand
Product name, white brown rope
4.1.1 The rope should be made of new raw materials, and the rope and rope strands should be continuous and untwisted. 4.1.2 Unless otherwise specified, the rope structure is the twist direction of the rope yarn, the S direction of the rope strand, and the Z direction of the rope. Approved by the State Administration of Technical Supervision on April 12, 1994.|tt||GB/T 15029--94
Implemented on October 1, 1994
GB/T 15029--94
4.1.3 The shapes of three-strand ropes and four-strand ropes are shown in Figures 1 and 2. Figure 1 The shape of three-strand rope (type A)
Figure 2 The shape of single-core four-strand rope (type B)
4.1.4 The maximum rope span: three-strand rope is 3.5 times the nominal diameter; four-strand rope is 4.5 times the nominal diameter. 4.2 Main technical requirements
4.2.1 The linear density and tolerance of the rope, the minimum breaking strength shall comply with Table 1. 4.2.2 The oil content of the rope shall generally not exceed 15%. Table 1
Line density and tolerance, minimum breaking strength
Line density
Nominal value, ktex
Tolerance, %
Superior products
Minimum breaking strength, daN
First-class products
Qualified products
5 Test method
Line density
Nominal value, ktex
5.1 Linear density and breaking strength test
GB/T15029—94
Continued Table 1
Tolerance, %
Superior products
Minimum breaking strength, daN
First-class products
The tests for rope linear density and breaking strength shall be carried out in accordance with the provisions of 3.1, 3.2 and 5.1 to 5.4 of GB8834. 5.2 Oil content
The oil content of the rope shall be determined in accordance with the provisions of Appendix B.
5.3 Lay pitch
The lay pitch of the rope shall be determined in accordance with Article 5.3.2 of GB8834. 6 Inspection rules
6.1 Factory inspection
6.1.1 Before leaving the factory, the rope shall be inspected for rope lay pitch, linear density, minimum breaking strength and other items in accordance with this standard. 6.1.2 Sampling, selection and adjustment of specimens shall be carried out in accordance with the provisions of Chapter 4 of GB8834. 6.2 Re-inspection
Qualified products
If the relevant parties have objections to the quality of the product, they may conduct sampling inspection together and judge it based on the re-inspection results. The re-inspection shall be conducted once. All expenses in the re-inspection shall be borne by the responsible party.
6.3 Weight acceptance
6.3.1 The public moisture regain of white brown rope is 13%. 6.3.2 The weight of the whole batch of ropes shall be inspected and accepted according to the weight indicated on each bundle of ropes. 6.3.3 The weight of each bundle of ropes includes the weight of the ropes used to tie the ropes, but does not include the weight of the outer packaging materials. The weight of the ropes used to tie the ropes of the rope bundle shall not exceed 0.5% of the weight of the rope bundle.
6.3.4 If the relevant parties have any objection to the weight of the ropes, they may jointly select sample bundles according to the provisions of Article 6.1 of this standard, test the moisture regain of the ropes according to the provisions of Appendix A of this standard, and calculate the rope gauge according to the provisions of Appendix C. Acceptance shall be based on the rope gauge. 7 Packaging, marking, transportation and storage
7.1 Packaging
7.1.1 Unless otherwise specified, the length of each bundle of ropes is 220m, which is the length measured when the tension is zero; the allowable deviation of the rope bundle length is: ±5% for a nominal diameter less than or equal to 14mm, and ±3% for a nominal diameter greater than 14mm. 7.1.2 The rope bundles shall be tightly coiled and neat. Tie them firmly. 7.1.3 The outer packaging materials of rope bundles shall effectively protect the product quality. 7.2 Marking
7.2.1 Use marking
The marking used for white brown rope shall be in accordance with Appendix D.
7.2.2 Label
Note
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GB/T15029-94
Each rope bundle shall be attached with a label indicating the product name, trademark, nominal diameter, grade, length, bundle weight, implementation standard number, manufacturer name, production unit address, production date and product qualified mark. 7.2.3 Outer packaging marking
The packaging cloth shall be printed with product mark, grade, bundle weight, production date, manufacturer name and moisture-proof mark. 7.3 Transportation
7.3.1 The carriage and cabin for transporting ropes must be clean and dry, and shall not be mixed with flammable, explosive and corrosive items; ropes shall be stacked according to grade and nominal diameter.
7.3.2 During transportation and loading and unloading, the ropes must be protected from moisture, contamination, loosening of rope bundles, and strict fire prevention. 7.4 Storage
7.4.1 Ropes must not be piled in the open air, and must not be piled together with flammable, explosive and corrosive items. 7.4.2 Ropes should be piled on the warehouse dunnage according to grade and nominal diameter. The warehouse should be kept clean, dry and well ventilated. Ropes must be protected from moisture, and strict fire prevention must be taken.
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A1 Principle
GB/T 15029--94
Appendix A
Test method for moisture regain of ropes
(Supplement)
The moisture of the sample is distilled with an appropriate solvent, and the moisture regain is calculated. A2 Test conditions
The test is carried out under ambient atmospheric conditions.
A3 Test instruments and reagents
A3.1 Round bottom flask: 1000mL.
A3.2 Condenser: Receiver with scale. A3.3 Closed electric furnace.
A3.4 Balance: Sensitivity 0.1g.
A3.5 Solvent: Xylene or appropriate benzene fraction. A4 Sampling
Take about 20-30g of rope from each sample bundle as a sample and seal it in a plastic bag. A5 Test procedurebZxz.net
A5.1 Weigh the sample to an accuracy of 0.1g. This weight is the wet weight of the sample. A5.2 Put the sample into the flask, inject the solvent, connect the condenser, and pass the condensed water. A5.3 Heat the flask to keep the solvent boiling. A5.4 Distill until the water mist in the flask disappears and the distillate in the condenser does not reflux. A5.5 After the xylene and water in the receiver are separated, record the weight of the water. Accurate to 0.1g. A5.6 During the entire test, the test room must be well ventilated and open flames are not allowed. A6 Calculation and Expression
A6.1 The moisture regain of the sample is calculated according to formula (A1): H.
Where: H. —Moisture regain,%;
S,—Water weight of the sample, g;
S-—Wet weight of the sample, g.
The calculated value is the test value of the moisture regain of the sample. S
A6.2 The moisture regain of the whole batch of ropes is expressed as the arithmetic mean of all test values. The value is accurate to one decimal place. Appendix B
Test method for oil content of rope
(Supplement)
B1 Principle
Standard search
(A1)
GB/T 15029—94
Use appropriate solvent to extract the lubricant contained in the sample, remove the solvent, dry it, weigh the residual lubricant, and calculate the oil content. B2 Test conditions
The test is generally carried out under ambient atmospheric conditions. B3 Test instruments and solvents
B3.1 Balance: sensitivity 0.1g.
B3.2 Soxhlet extractor: 500mL.
B3.3 Electric constant temperature water bath.
B3.4 Oven; with good air circulation device, the temperature can be controlled at 105±2℃. B3.5 Dryer.
B3.6 Petroleum ether.
B4 Sampling
Take a rope section of at least 100g from each sample rope bundle, and then cut two samples with complete cross-sections from the middle of the rope section. Sample 1 weighs about 20~30g and is used to determine the lubricating oil content; sample 2 weighs about 50g and is used to determine the moisture content. The samples are sealed in plastic bags. B5 Test procedure
B5.1 Determine the moisture content of sample 2 according to Appendix A of this standard. B5.2 Weigh sample 1 to an accuracy of 0.1g. This weight is the wet weight of the sample. Wrap the sample with filter paper. B5.3 Dry the cleaned flask to constant weight. This weight is the net weight of the flask. Accurate to 0.1g. B5.4 Inject petroleum ether into the flask, the injection amount is about half of the flask volume. Put the sample into the extraction tube, connect the condenser, and connect the cooling water.
B5.5 Place the whole set of extractors in a water bath and heat them at 50~52℃C. B5.6 After extracting for about 3 hours, take out the sample from the extraction tube and continue to evaporate the oil solution containing oil to recover petroleum ether. B5.7 Place the flask with clean outer wall in a 101~105℃ drying oven to dry to constant weight, then place the flask in a dryer and cool it, weigh and record it. The difference between this weight and the net weight of the flask is the lubricant content of the sample. B5.8 During the entire test, doors and windows should be opened, and fireworks are strictly prohibited. B6 Calculation and Expression
B6.1 Calculate the moisture content of sample 1 according to formula (B1): ms
Where: m;—moisture content of sample 1·g, mi——wet weight of sample 1·g;
m2—wet weight of sample 2, g;
m—moisture content of sample 2, g.
B6.2 The oil content of the sample is calculated according to formula (B2): M=
mi X ma
m,-(m, +m,)
Wherein: M--oil content, %;
m—-lubricant content of sample 1+g,
wet weight of sample 1, g;
m:--water content of sample 1·g;
The calculated value is the test value of the oil content of the sample. 170
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·.( B2 )
C1 Principle
GB/T 15029--94
Appendix C
Calculation Method of Rope Common Weight
(Supplement)
Weigh the rope bundle and determine its actual moisture regain, and then calculate the common weight according to the common moisture regain. C2 Determine the weight of the sample bundle
Under ambient atmospheric conditions, weigh the sample bundle and record it. The weight is the actual weight of the sample bundle. Weigh to an accuracy of 0.1kg. C3 Calculation and expression of common weight
C3.1 The common weight of the sample bundle is calculated according to formula (C1):
Where: Z,—common weight, kg,
Z.--actual weight, kg;
H.standard moisture regain, %;
H,-measured moisture regain,%. The calculated value is the common weight of the sample bundle. The calculation is accurate to one decimal place. C3.2 The common weight of the whole batch of ropes is calculated according to formula (C2): Z,= B, ×
Where: 2—
common weight of a whole batch of ropes, kg;
B,—indicated weight of the whole batch of ropes, kg;
Z. —common weight of all sample bundles, kg,
B. Indicated weight of all sample bundles, kg.
The calculated value is the gross weight of the rope batch. Calculate to one decimal place. Appendix D
Marking for white palm rope
(reference)
D1 White palm rope that complies with this standard shall be marked with a red rope yarn or flat wire. ·(C1)
(C2)
The mark shall be placed in one strand of rope to ensure that the rope can be identified even if it is stained, soaked and discolored during use. D2 For ropes with a nominal diameter greater than 12mm, a red flat wire shall be added to one strand of rope. The flat wire shall be at least 3mm wide and printed with the standard number of this standard and a mark used to identify the manufacturer. The maximum distance between two consecutive marks is 1m. 171
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Additional Notes:
This standard was proposed by the Ministry of Agriculture.
This standard was drafted by the Guangdong Province Yuexi Agricultural Reclamation Bureau. The main drafters of this standard are Zheng Wanchun, Zhu Tianli and Gao Jianguo.
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