Some standard content:
Light Industry Industry Standard of the People's Republic of China
Fiber tape measure
Subject content and scope of application
QB/T 1519—1992
This standard specifies the product classification, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of fiber tape measures, which are commonly used length measuring tools.
This standard applies to all types of fiber tape measures (hereinafter referred to as "tape measures") for general length measurement. Reference standards
GB/T 2828
GB/T 2829
GB/T 5305
3 Product classification
3.1 Types
Batch inspection counting sampling procedures and sampling tables (applicable to inspection of continuous batches) Periodic inspection counting sampling procedures and sampling tables (applicable to inspection of production process stability) Hand tool packaging, marking, transportation and storage Tape measures are divided into cloth tape measures and plastic tape measures according to the raw materials used for the tape. 3.2 Types
Tape measures are divided into three types according to different structures: folding type, box type and frame type, as shown in Figures 1, 2 and 3. 1- tape measure; 2- chuck
Figure 1 Folding type tape measure
Approved by the Ministry of Light Industry of the People's Republic of China on June 8, 1992494
All kinds of standards and notes Industry information free download
1993-02-01 implementation
1- handle; 2- protective diagram; 3- ruler box 1
4 box door; 5- tape measure; 6- pull ring
Figure 2 Box type tape measure
3.3 Specifications
Specifications (length × width) are shown in Table 1. Type
Folding and rolling type
Folding and rolling type
4 Technical requirements
4.1 Material requirements
QB/T1519--1992
Nominal length series of tape, m
Length tolerance
Integer multiples of 0.5 (less than 5m)
Integer multiples of 5
1--frame; 2--handle; 3-guard ring, 4-tape, 5-pull ring
Figure 3 Frame type tape measure
Width series of tape, mm
7.5,13,14.15,16,18,20
Width tolerance
4.1.1 Core: Use stable and high-strength natural fiber, chemical fiber or mixed fiber and other materials. 4.1.2 Ruler tape: The core fiber of the ruler should be woven or laid flat and then coated with a protective coating or plastic. The surface should be smooth, uniform in color, stable and durable. 4.1.3 Ruler box (frame): Made of metal, leather, artificial leather, reinforced plastic or engineering plastic, it should be smooth, firm, strong and durable. 4.1.4 Handle: Choose general metal or engineering plastic, and it should have sufficient strength and rigidity. 4.2 Length tolerance
4.2.1 The error of graduation value is shown in Table 2.
Minimum scale value
4.2.2 Length tolerance between any line and zero point a.
Maximum allowable error
When the length is within the minimum scale value, the maximum allowable error is shown in Table 2; 495
Quasi-hot solid network
Ink standard line
QB/T 1519—1992
When the length is greater than the minimum scale value, the maximum allowable error is calculated according to formula (1), b.
4=±(1.2+0.81).
Where: 4--maximum allowable error of length, mm; - represents the length value. When the measured length is less than an integer multiple of meters, the nearest integer meter is taken upwards. 4.2.3 For end faces or combined measuring tools, the length tolerance should be increased by ±0.5mm. 4.3 Width tolerance
The width tolerance of the tape is shown in Table 1.
4.4 Tension extension tolerance
Under the extension tension specified in Table 3, the extension length of the tape shall be less than 2mm per meter. Table 3
Width of tape, mm
Extension tension, N
4.5 Shrinkage rate in water immersion
>10～14
The tape shall be immersed in (20±5)℃ water for 30min, and after being taken out and dried, the shrinkage rate must be less than 0.1%. 4.6 Breaking strength of tape
When the tape is subjected to the tension specified in Table 4 at any length of 200nm in the longitudinal direction, the tape shall not break. Table 4
Width of tape.mm
10～~14
4.7 Printing fastness
The tape can still be clearly read after being rubbed 100 times. 4.8 Anti-breakage of tape
After folding the tape three times repeatedly, there should be no cracks. 4.9 Lines of tape
4.9.1 All lines of tape must be clear, complete, and uniform in thickness, without duplicate lines, missing lines, or obvious broken lines. Force, N
4.9.2 The lengths of decimeter (dm), centimeter (cm), and millimeter (mm) lines should be clearly distinguished and perpendicular to the edge (the maximum amount of edge not reaching should be less than 1mm).
4.9.3 See Table 5 for line width.
>1～10
>10～~100
Line width
0.2-~0. 5
0. 4~1. 0
0. 5～1. 0
4.9.4 The same tape (including the front and back) may be printed with multiple scales, but the scale zero point and the corresponding length value lines must be aligned, with an error of no more than 1mm.
4.10 Tape numbers
4.10.1 Tape numbers must be obvious, correct and easy to read. 496
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QB/T 1519---1992
4.10.2 Numbers should be marked according to the meter (m), decimeter (dm) or centimeter (cm) values represented by the graduation lines. Except for meters (m), it is allowed not to mark the unit after the number. It is allowed not to mark \m" after 10m. 4.11 The "zero point" of the ruler can be on the inside of the pull ring or ruler hook, or at the end of the ruler or anywhere within 100mm from the end of the ruler. The line indicating the "zero point" should be marked with the number \0".
4.12 The end line of the folding tape measure should be at least 50mm away from the end of the ruler. 4.13 The length of the end line of the box (frame) type tape measure from the door of the ruler box (frame) is shown in Table 6. Table 6
>3～5
degrees, mm
4.14 The ruler tape should be placed flat on the calibration table and a pulling force of 9.8N±10% should be applied to every 5m of length (4.9N10% should be applied to the ruler tape below 3m) and it should be straight.
Ruler box, ruler frame The appearance should be flat, smooth, strong and without deformation, and the printed marks should be complete, clear and beautiful. 4.16#
The crank handle should be smooth and beautiful.
All accessories should be firmly and reliably assembled, easy and flexible to operate, and there should be no obstruction when the tape moves in and out. 5 Test method
5.1 Length error
The tape is placed flat on the calibration table (the error of the calibration measuring instrument is not greater than 1/4 of the gauge being tested), and the tension specified in Table 7 is loaded longitudinally, and after stabilizing for 30 seconds, its length error is measured.
The length of the tape, m
The measurement should be carried out under the environmental conditions of temperature (20±5)C and relative viscosity (65±5)%. 5.2 Width
Use a general measuring tool.
5.3 Tension extension
The difference between the length of the tape when the tension in 5.1 is applied and the length when the extension tension specified in Table 3 is reapplied must be less than 2mm/m.
5.4 Shrinkage rate after immersion in water
Put the test section of 1m or 5m long tape in water at (205)℃ for 30min, take it out, wipe off the surface moisture, make it dry, and then test it on the calibration table according to steps 5 and 1. Its shrinkage rate should be less than 0.1%. iL--l
Where: 8--—tape shrinkage rate;
Lo—tape length before immersion in water, m;
L—tape length after drying. m..
5.5 Tape breaking strength
Quasi-thermal solid network| |tt||（2）
QB/T1519--1992
The longitudinal fracture test of the tape shall be carried out in accordance with the provisions of Appendix A (Supplement). 5.6 Printing fastness
Use a rubber with a Shore hardness of 45~65 and an area of 18mm×7mm and apply a pressure of 9.8N. After rubbing the tape back and forth 100 times along the longitudinal length of 50mmrm, it can still be clearly read. 5.7 Tape anti-breakage
At (20±5)℃, fold the tape in half and lay it flat for 3 times at a certain point. No cracks should appear. 5.8 Appearance and structure
Inspect the appearance and structure of the tape visually and with a steel ruler with a minimum graduation value of 0.5mm. 6 Inspection rules
6.1 Inspection classification
Product inspection is divided into factory inspection and type inspection (see Table 8). Table 8
Inspection classification
Appearance, structure
Factory inspection
Length tolerance
Tape width
Appearance, structure
Length tolerance
Tape width
Type inspection
Inspection items
4.9~~4.17
Tape tensile extension
Tape printing fastness
Tape anti-bending
Tape shrinkage
Tape breakage
Inspection procedure
Test method
Sampling method
As per GB/T2828
As per GB/T2829
Note: The two tests in inspection procedure 7 should be carried out separately, and the number of samples for each item shall not be less than three pieces. 6.2 Factory inspection
6.2.1 The classification of unqualified products is shown in Table 9.
Classification of unqualified products
Classification code
B—-3
Determination of inspection results
According to the provisions of GB/T2828
According to the provisions of GB/T2829
Unqualified content
The error of the ruler length exceeds the standard provisions
Defects that cause measurement reading errors
Defects that seriously affect the performance
Defects that do not affect the measurement reading
Defects that do not affect the performance
6.2.2 The factory acceptance of products shall be carried out in accordance with the provisions of the single sampling plan of GB/T2828. Inspection level IL1
Qualified quality level Class B nonconforming products
Standard search network
Standard materials and labor costs
6.3 Type inspection
Class C nonconforming products
QB/T 1519
6.3.1 Type inspection shall be carried out in any of the following situations. a.
Once a year during normal production of the product; when there are major changes in materials, structure and process during production; b.
When the product is stopped for half a year and then resumed. c.
6.3.2 See Table 9 for the classification of nonconforming products.
6.3.3 Type inspection shall be carried out in accordance with the provisions of the one-time sampling plan in GB/T2829. Discrimination level DL=1
Unqualified quality level Class B unqualified products RQL=30 Class C unqualified products RQL=40
7 Marking, packaging, transportation, storage
7.1 Marking
7.1.1 The tape or box shall be marked with the manufacturer's name, registered trademark, specification or model, metrological certificate mark and manufacturing measuring instrument license number and production date.
7.1.2 Packaging marking shall be in accordance with GB/T5305. 7.2 Packaging, transportation and storage shall be in accordance with GB/T5305. 8 Special requirements
8.1 Special requirements shall be agreed upon by the supply and demand parties.
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QB/T 1519—1992
Appendix A
Test method for breaking strength of tape
(Supplement)
This appendix gives the test method for longitudinal breaking strength of fiber tape. A1 Sampling
A1.1 The method and quantity of sampling of test samples shall be as specified in Table 8. A1.2 Six sections of tape with a length of about 0.6m shall be cut from each sample, and each group of three samples shall form a group with a total of two groups. A1.3 The cut samples shall not have damage or appearance defects. A2 Test conditions
The standard conditions of the test room are temperature (20±3)℃ and relative humidity (65±5)%. The samples shall be unfolded under these specified conditions and placed for 24 hours before testing.
One meter weight test
A3.1 Test equipment
Industrial balance: sensitivity is 0.01g;
Steel ruler: length is greater than 1m, and the graduation value is 1mm. Operation steps
Put the sample flat on the test workbench, cut a certain length on each sample along the longitudinal direction of the sample in a natural state; b.
Weigh on the balance, read the reading accurately to 0.01g, and then convert it to the weight of 1m. Calculate to 0.01g and round it to 0.1g. Test each sample once.
A4 Breaking strength test
Test instrument
Strength testing machine with elongation measurement device. A4.2
Selection and calibration of instruments
Slip phenomenon;
The use range of the strength tester dial should be within 20%~75% of the full scale; the distance between the upper and lower clamps of the strength tester is 20cm when measuring the longitudinal breaking strength of the belt, and the descending speed is 100~110mm/min when the lower clamp is not loaded; the strength pointer and the elongation pointer should be at zero; the inner and outer surfaces of the upper and lower clamps should be affixed with good linings, and powdered rosin can be applied between the sample and the lining to overcome the pre-tension hammer according to Table A1.
1 m belt standard weight
Pre-tension hammer
A4.3 Operation steps
Test each sample once;
Below 5.0
12.6~30.0
When testing, first put down the clamp and fix the upper clamp. Put the belt in the center of the clamp, tighten the upper clamp initially, put the other end of the sample into the lower clamp, hang the pre-tension weight, loosen the upper clamp slightly, let the sample drop slightly due to gravity and turn the surface vertical, tighten the upper clamp, loosen the clamp, and then tighten the lower clamp, remove the pre-tension weight for testing. If it is necessary to measure the elongation at break, after the lower clamp begins to descend, pay attention to observe the elongation at the moment of fracture, and record the obtained fracture strength and elongation at the same time. If it is necessary to measure the standard elongation, pay attention to observe the strong pointer. When it turns to the standard strength of the object being measured, stop the elongation scale from descending and record its elongation. However, the lower clamp continues to descend without stopping until the sample breaks. Read the strength number, the fracture strength and elongation readings, and read to the minimum scale of the dial and ruler;
The average is calculated to 0.01kg and 0.01%, and rounded to 0.1kg and 0.1%. A4.4 Precautions
If the specimen slips or breaks in the jaws (within 10mm of the clamp) during the test, another specimen should be replaced for retesting. If the fracture strength has reached the index requirements, retesting is not necessary; b.
If any abnormal phenomenon is found during the test (including test readings and machinery, etc.), the test should be stopped immediately to check and analyze the cause; during operation, prevent the specimen in the jaws from twisting and skewing; during the test, the "0" point of the strength pointer and the extension pointer should be observed frequently, and if there is any change, it should be adjusted in time; d.
The "stress" point of the suspended pre-tensioning hammer should be parallel to the jaws and should not be skewed. e
A5 Test Result Processing
A5.1If the test result does not meet the standard, two times the number of specimens should be cut at the original sampling location for retesting. The retest result is qualified if both specimens meet the standard.
A5.2 The calculation of test results is expressed as arithmetic mean, and the rounding method is adopted when calculating the average. Additional notes:
This standard is proposed by the Quality Standards Department of the Ministry of Light Industry. This standard is under the jurisdiction of the National Tool Hardware Standardization Center. This standard is drafted by the "Fiber Tape Standard" working group. The main drafters of this standard are Xu Denghuan, Xu An, Shi Xinquan, Peng Quanqing, and Liu Guangjia. This standard refers to the International Organization for Legal Metrology (OIML), International Recommendation No. 35 "Common Length Measuring Tools" and Japanese Standard JIS B7522 "Cloth Tape Measure" part of the content.
From the date of implementation of this standard, the original Light Industry Ministry Standard SG167-1979 "Cloth Tape Measure" will be invalid. 501
Free download of various standard industry information1 The classification of unqualified products is shown in Table 9.
Classification of unqualified products
Classification code
B—-3
Determination of inspection results
According to the provisions of GB/T2828
According to the provisions of GB/T2829
Unqualified content
The error of the ruler length exceeds the standard provisions
Defects that cause measurement reading errors
Defects that seriously affect the performance
Defects that do not affect the measurement reading
Defects that do not affect the performance
6.2.2 The factory acceptance of products shall be carried out in accordance with the provisions of the single sampling plan of GB/T2828. Inspection level IL1
Qualified quality level Class B nonconforming products
Standard search network
Standard materials and labor costs
6.3 Type inspection
Class C nonconforming products
QB/T 1519
6.3.1 Type inspection shall be carried out in any of the following situations. a.
Once a year during normal production of the product; when there are major changes in materials, structure and process during production; b.
When the product is stopped for half a year and then resumed. c.
6.3.2 See Table 9 for the classification of nonconforming products.
6.3.3 Type inspection shall be carried out in accordance with the provisions of the one-time sampling plan in GB/T2829. Discrimination level DL=1
Unqualified quality level Class B unqualified products RQL=30 Class C unqualified products RQL=40
7 Marking, packaging, transportation, storage
7.1 Marking
7.1.1 The tape or box shall be marked with the manufacturer's name, registered trademark, specification or model, metrological certificate mark and manufacturing measuring instrument license number and production date.
7.1.2 Packaging marking shall be in accordance with GB/T5305. 7.2 Packaging, transportation and storage shall be in accordance with GB/T5305. 8 Special requirements
8.1 Special requirements shall be agreed upon by the supply and demand parties.
Quasi-search network
Standard road material
QB/T 1519—1992
Appendix A
Test method for breaking strength of tape
(Supplement)
This appendix gives the test method for longitudinal breaking strength of fiber tape. A1 Sampling
A1.1 The method and quantity of sampling of test samples shall be as specified in Table 8. A1.2 Six sections of tape with a length of about 0.6m shall be cut from each sample, and each group of three samples shall form a group with a total of two groups. A1.3 The cut samples shall not have damage or appearance defects. A2 Test conditions
The standard conditions of the test room are temperature (20±3)℃ and relative humidity (65±5)%. The samples shall be unfolded under these specified conditions and placed for 24 hours before testing.
One meter weight test
A3.1 Test equipment
Industrial balance: sensitivity is 0.01g;
Steel ruler: length is greater than 1m, and the graduation value is 1mm. Operation steps
Put the sample flat on the test workbench, cut a certain length on each sample along the longitudinal direction of the sample in a natural state; b.
Weigh on the balance, read the reading accurately to 0.01g, and then convert it to the weight of 1m. Calculate to 0.01g and round it to 0.1g. Test each sample once.
A4 Breaking strength test
Test instrument
Strength testing machine with elongation measurement device. A4.2
Selection and calibration of instruments
Slip phenomenon;
The use range of the strength tester dial should be within 20%~75% of the full scale; The distance between the upper and lower clamps of the strength tester is 20cm when measuring the longitudinal breaking strength of the belt, and the lower clamp is 100~110mm/min when it is not loaded; The strength pointer and the elongation pointer should be at zero; The inner and outer surfaces of the upper and lower clamps should be affixed with good linings, and powdered rosin can be applied between the sample and the lining to overcome the pre-tension hammer according to Table A1.
1 m belt standard weight
Pre-tension hammer
A4.3 Operation steps
Test each sample once;
Below 5.0
12.6~30.0
When testing, first put down the clamp and fix the upper clamp. Put the belt in the center of the clamp, tighten the upper clamp initially, put the other end of the sample into the lower clamp, hang the pre-tension weight, loosen the upper clamp slightly, let the sample drop slightly due to gravity and turn the surface vertical, tighten the upper clamp, loosen the clamp, and then tighten the lower clamp, remove the pre-tension weight for testing. If it is necessary to measure the elongation at break, after the lower clamp begins to descend, pay attention to observe the elongation at the moment of fracture, and record the obtained fracture strength and elongation at the same time. If it is necessary to measure the standard elongation, pay attention to observe the strong pointer. When it turns to the standard strength of the object being measured, stop the elongation scale from descending and record its elongation. However, the lower clamp continues to descend without stopping until the sample breaks. Read the strength number, the fracture strength and elongation readings, and read to the minimum scale of the dial and ruler;
The average is calculated to 0.01kg and 0.01%, and rounded to 0.1kg and 0.1%. A4.4 Precautions
If the specimen slips or breaks in the jaws (within 10mm of the clamp) during the test, another specimen should be replaced for retesting. If the fracture strength has reached the index requirements, retesting is not necessary; b.
If any abnormal phenomenon is found during the test (including test readings and machinery, etc.), the test should be stopped immediately to check and analyze the cause; during operation, prevent the specimen in the jaws from twisting and skewing; during the test, the "0" point of the strength pointer and the extension pointer should be observed frequently, and if there is any change, it should be adjusted in time; d.
The "stress" point of the suspended pre-tensioning hammer should be parallel to the jaws and should not be skewed. e
A5 Test Result Processing
A5.1If the test result does not meet the standard, two times the number of specimens should be cut at the original sampling location for retesting. The retest result is qualified if both specimens meet the standard.
A5.2 The calculation of test results is expressed as arithmetic mean, and the rounding method is adopted when calculating the average. Additional notes:
This standard is proposed by the Quality Standards Department of the Ministry of Light Industry. This standard is under the jurisdiction of the National Tool Hardware Standardization Center. This standard is drafted by the "Fiber Tape Standard" working group. The main drafters of this standard are Xu Denghuan, Xu An, Shi Xinquan, Peng Quanqing, and Liu Guangjia. This standard refers to the International Organization for Legal Metrology (OIML), International Recommendation No. 35 "Common Length Measuring Tools" and Japanese Standard JIS B7522 "Cloth Tape Measure" part of the content.
From the date of implementation of this standard, the original Light Industry Ministry Standard SG167-1979 "Cloth Tape Measure" will be invalid. 501
Free download of various standard industry information1 The classification of unqualified products is shown in Table 9.
Classification of unqualified products
Classification code
B—-3
Determination of inspection results
According to the provisions of GB/T2828
According to the provisions of GB/T2829
Unqualified content
The error of the ruler length exceeds the standard provisions
Defects that cause measurement reading errors
Defects that seriously affect the performance
Defects that do not affect the measurement reading
Defects that do not affect the performance
6.2.2 The factory acceptance of products shall be carried out in accordance with the provisions of the single sampling plan of GB/T2828. Inspection level IL1
Qualified quality level Class B nonconforming products
Standard search network
Standard materials and labor costs
6.3 Type inspection
Class C nonconforming products
QB/T 1519
6.3.1 Type inspection shall be carried out in any of the following situations. a.
Once a year during normal production of the product; when there are major changes in materials, structure and process during production; b.
When the product is stopped for half a year and then resumed. c.
6.3.2 See Table 9 for the classification of nonconforming products.
6.3.3 Type inspection shall be carried out in accordance with the provisions of the one-time sampling plan in GB/T2829. Discrimination level DL=1
Unqualified quality level Class B unqualified products RQL=30 Class C unqualified products RQL=40
7 Marking, packaging, transportation, storage
7.1 Marking
7.1.1 The tape or box shall be marked with the manufacturer's name, registered trademark, specification or model, metrological certificate mark and manufacturing measuring instrument license number and production date.
7.1.2 Packaging marking shall be in accordance with GB/T5305. 7.2 Packaging, transportation and storage shall be in accordance with GB/T5305. 8 Special requirements
8.1 Special requirements shall be agreed upon by the supply and demand parties.
Quasi-search network
Standard road material
QB/T 1519—1992
Appendix A
Test method for breaking strength of tape
(Supplement)
This appendix gives the test method for longitudinal breaking strength of fiber tape. A1 Sampling
A1.1 The method and quantity of sampling of test samples shall be as specified in Table 8. A1.2 Six sections of tape with a length of about 0.6m shall be cut from each sample, and each group of three samples shall form a group with a total of two groups. A1.3 The cut samples shall not have damage or appearance defects. A2 Test conditions
The standard conditions of the test room are temperature (20±3)℃ and relative humidity (65±5)%. The samples shall be unfolded under these specified conditions and placed for 24 hours before testing.
One meter weight test
A3.1 Test equipment
Industrial balance: sensitivity is 0.01g;
Steel ruler: length is greater than 1m, and the graduation value is 1mm. Operation steps
Put the sample flat on the test workbench, cut a certain length on each sample along the longitudinal direction of the sample in a natural state; b.
Weigh on the balance, read the reading accurately to 0.01g, and then convert it to the weight of 1m. Calculate to 0.01g and round it to 0.1g. Test each sample once.
A4 Breaking strength test
Test instrument
Strength testing machine with elongation measurement device. A4.2
Selection and calibration of instruments
Slip phenomenon;
The use range of the strength tester dial should be within 20%~75% of the full scale; The distance between the upper and lower clamps of the strength tester is 20cm when measuring the longitudinal breaking strength of the belt, and the lower clamp is 100~110mm/min when it is not loaded; The strength pointer and the elongation pointer should be at zero; The inner and outer surfaces of the upper and lower clamps should be affixed with good linings, and powdered rosin can be applied between the sample and the lining to overcome the pre-tension hammer according to Table A1.
1 m belt standard weight
Pre-tension hammer
A4.3 Operation steps
Test each sample once;
Below 5.0
12.6~30.0
When testing, first put down the clamp and fix the upper clamp. Put the belt in the center of the clamp, tighten the upper clamp initially, put the other end of the sample into the lower clamp, hang the pre-tension weight, loosen the upper clamp slightly, let the sample drop slightly due to gravity and turn the surface vertical, tighten the upper clamp, loosen the clamp, and then tighten the lower clamp, remove the pre-tension weight for testing. If it is necessary to measure the elongation at break, after the lower clamp begins to descend, pay attention to observe the elongation at the moment of fracture, and record the obtained fracture strength and elongation at the same time. If it is necessary to measure the standard elongation, pay attention to observe the strong pointer. When it turns to the standard strength of the object being measured, stop the elongation scale from descending and record its elongation. However, the lower clamp continues to descend without stopping until the sample breaks. Read the strength number, the fracture strength and elongation readings, and read to the minimum scale of the dial and ruler;
The average is calculated to 0.01kg and 0.01%, and rounded to 0.1kg and 0.1%. A4.4 Precautions
If the specimen slips or breaks in the jaws (within 10mm of the clamp) during the test, another specimen should be replaced for retesting. If the fracture strength has reached the index requirements, retesting is not necessary; b.
If any abnormal phenomenon is found during the test (including test readings and machinery, etc.), the test should be stopped immediately to check and analyze the cause; during operation, prevent the specimen in the jaws from twisting and skewing; during the test, the "0" point of the strength pointer and the extension pointer should be observed frequently, and if there is any change, it should be adjusted in time; d.
The "stress" point of the suspended pre-tensioning hammer should be parallel to the jaws and should not be skewed. e
A5 Test Result Processing
A5.1If the test result does not meet the standard, two times the number of specimens should be cut at the original sampling location for retesting. The retest result is qualified if both specimens meet the standard.
A5.2 The calculation of test results is expressed as arithmetic mean, and the rounding method is adopted when calculating the average. Additional notes:
This standard is proposed by the Quality Standards Department of the Ministry of Light Industry. This standard is under the jurisdiction of the National Tool Hardware Standardization Center. This standard is drafted by the "Fiber Tape Standard" working group. The main drafters of this standard are Xu Denghuan, Xu An, Shi Xinquan, Peng Quanqing, and Liu Guangjia. This standard refers to the International Organization for Legal Metrology (OIML), International Recommendation No. 35 "Common Length Measuring Tools" and Japanese Standard JIS B7522 "Cloth Tape Measure" part of the content.
From the date of implementation of this standard, the original Light Industry Ministry Standard SG167-1979 "Cloth Tape Measure" will be invalid. 501
Free download of various standard industry information1 Special requirements shall be agreed upon by both parties.
Quasi-search network
Standard road material
QB/T 1519—1992
Appendix A
Test method for breaking strength of tape
(Supplement)
This appendix gives the test method for longitudinal breaking strength of fiber tape. A1 Sampling
A1.1 The method and quantity of sampling of test samples shall be as specified in Table 8. A1.2 Six sections of tape with a length of about 0.6m shall be cut from each sample, and each group of three samples shall form a group with a total of two groups. A1.3 The cut samples shall not have damage or appearance defects. A2 Test conditions
The standard conditions of the test room are temperature (20±3)℃ and relative humidity (65±5)%. The samples shall be unfolded under these specified conditions and placed for 24 hours before testing.
One meter weight test
A3.1 Test equipment
Industrial balance: sensitivity is 0.01g;
Steel ruler: length is greater than 1m, and the graduation value is 1mm. Operation steps
Put the sample flat on the test workbench, cut a certain length on each sample along the longitudinal direction of the sample in a natural state; b.
Weigh on the balance, read the reading accurately to 0.01g, and then convert it to the weight of 1m. Calculate to 0.01g and round it to 0.1g. Test each sample once.
A4 Breaking strength test
Test instrument
Strength testing machine with elongation measurement device. A4.2
Selection and calibration of instruments
Slip phenomenon;
The use range of the strength tester dial should be within 20%~75% of the full scale; the distance between the upper and lower clamps of the strength tester is 20cm when measuring the longitudinal breaking strength of the belt, and the descending speed is 100~110mm/min when the lower clamp is not loaded; the strength pointer and the elongation pointer should be at zero; the inner and outer surfaces of the upper and lower clamps should be affixed with good linings, and powdered rosin can be applied between the sample and the lining to overcome the pre-tension hammer according to Table A1.
1 m belt standard weight
Pre-tension hammer
A4.3 Operation steps
Test each sample once;
Below 5.0
12.6~30.0
When testing, first put down the clamp and fix the upper clamp. Put the belt in the center of the clamp, tighten the upper clamp initially, put the other end of the sample into the lower clamp, hang the pre-tension weight, loosen the upper clamp slightly, let the sample drop slightly due to gravity and turn the surface vertical, tighten the upper clamp, loosen the clamp, and then tighten the lower clamp, remove the pre-tension weight for testing. If it is necessary to measure the elongation at break, after the lower clamp begins to descend, pay attention to observe the elongation at the moment of fracture, and record the obtained fracture strength and elongation at the same time. If it is necessary to measure the standard elongation, pay attention to observe the strong pointer. When it turns to the standard strength of the object being measured, stop the elongation scale from descending and record its elongation. However, the lower clamp continues to descend without stopping until the sample breaks. Read the strength number, the fracture strength and elongation readings, and read to the minimum scale of the dial and ruler;
The average is calculated to 0.01kg and 0.01%, and rounded to 0.1kg and 0.1%. A4.4 Precautions
If the specimen slips or breaks in the jaws (within 10mm of the clamp) during the test, another specimen should be replaced for retesting. If the fracture strength has reached the index requirements, retesting is not necessary; b.
If any abnormal phenomenon is found during the test (including test readings and machinery, etc.), the test should be stopped immediately to check and analyze the cause; during operation, prevent the specimen in the jaws from twisting and skewing; during the test, the "0" point of the strength pointer and the extension pointer should be observed frequently, and if there is any change, it should be adjusted in time; d.
The "stress" point of the suspended pre-tensioning hammer should be parallel to the jaws and should not be skewed. e
A5 Test Result Processing
A5.1If the test result does not meet the standard, two times the number of specimens should be cut at the original sampling location for retesting. The retest result is qualified if both specimens meet the standard.
A5.2 The calculation of test results is expressed as arithmetic mean, and the rounding method is adopted when calculating the average. Additional notes:
This standard is proposed by the Quality Standards Department of the Ministry of Light Industry. This standard is under the jurisdiction of the National Tool Hardware Standardization Center. This standard is drafted by the "Fiber Tape Standard" working group. The main drafters of this standard are Xu Denghuan, Xu An, Shi Xinquan, Peng Quanqing, and Liu Guangjia. This standard refers to the International Organization for Legal Metrology (OIML), International Recommendation No. 35 "Common Length Measuring Tools" and Japanese Standard JIS B7522 "Cloth Tape Measure" part of the content.
From the date of implementation of this standard, the original Light Industry Ministry Standard SG167-1979 "Cloth Tape Measure" will be invalid. 501
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QB/T 1519—1992
Appendix A
Test method for breaking strength of tape
(Supplement)
This appendix gives the test method for longitudinal breaking strength of fiber tape. A1 Sampling
A1.1 The method and quantity of sampling of test samples shall be as specified in Table 8. A1.2 Six sections of tape with a length of about 0.6m shall be cut from each sample, and each group of three samples shall form a group with a total of two groups. A1.3 The cut samples shall not have damage or appearance defects. A2 Test conditions
The standard conditions of the test room are temperature (20±3)℃ and relative humidity (65±5)%. The samples shall be unfolded under these specified conditions and placed for 24 hours before testing.
One meter weight test
A3.1 Test equipment
Industrial balance: sensitivity is 0.01g;
Steel ruler: length is greater than 1m, and the graduation value is 1mm. Operation steps
Put the sample flat on the test workbench, cut a certain length on each sample along the longitudinal direction of the sample in a natural state; b.
Weigh on the balance, read the reading accurately to 0.01g, and then convert it to the weight of 1m. Calculate to 0.01g and round it to 0.1g. Test each sample once.
A4 Breaking strength test
Test instrument
Strength testing machine with elongation measurement device. A4.2
Selection and calibration of instruments
Slip phenomenon;
The use range of the strength tester dial should be within 20%~75% of the full scale; the distance between the upper and lower clamps of the strength tester is 20cm when measuring the longitudinal breaking strength of the belt, and the descending speed is 100~110mm/min when the lower clamp is not loaded; the strength pointer and the elongation pointer should be at zero; the inner and outer surfaces of the upper and lower clamps should be affixed with good linings, and powdered rosin can be applied between the sample and the lining to overcome the pre-tension hammer according to Table A1.
1 m belt standard weight
Pre-tension hammer
A4.3 Operation steps
Test each sample once;
Below 5.0
12.6~30.0
When testing, first put down the clamp and fix the upper clamp. Put the belt in the center of the clamp, tighten the upper clamp initially, put the other end of the sample into the lower clamp, hang the pre-tension weight, loosen the upper clamp slightly, let the sample drop slightly due to gravity and turn the surface vertical, tighten the upper clamp, loosen the clamp, and then tighten the lower clamp, remove the pre-tension weight for testing. If it is necessary to measure the elongation at break, after the lower clamp begins to descend, pay attention to observe the elongation at the moment of fracture, and record the obtained fracture strength and elongation at the same time. If it is necessary to measure the standard elongation, pay attention to observe the strong pointer. When it turns to the standard strength of the object being measured, stop the elongation scale from descending and record its elongation. However, the lower clamp continues to descend without stopping until the sample breaks. Read the strength number, the fracture strength and elongation readings, and read to the minimum scale of the dial and ruler;
The average is calculated to 0.01kg and 0.01%, and rounded to 0.1kg and 0.1%. A4.4 Precautions
If the specimen slips or breaks in the jaws (within 10mm of the clamp) during the test, another specimen should be replaced for retesting. If the fracture strength has reached the index requirements, retesting is not necessary; b.bzxZ.net
If any abnormal phenomenon is found during the test (including test readings and machinery, etc.), the test should be stopped immediately to check and analyze the cause; during operation, prevent the specimen in the jaws from twisting and skewing; during the test, the "0" point of the strength pointer and the extension pointer should be observed frequently, and if there is any change, it should be adjusted in time; d.
The "stress" point of the suspended pre-tensioning hammer should be parallel to the jaws and should not be skewed. e
A5 Test Result Processing
A5.1If the test result does not meet the standard, two times the number of specimens should be cut at the original sampling location for retesting. The retest result is qualified if both specimens meet the standard.
A5.2 The calculation of test results is expressed as arithmetic mean, and the rounding method is adopted when calculating the average. Additional notes:
This standard is proposed by the Quality Standards Department of the Ministry of Light Industry. This standard is under the jurisdiction of the National Tool Hardware Standardization Center. This standard is drafted by the "Fiber Tape Standard" working group. The main drafters of this standard are Xu Denghuan, Xu An, Shi Xinquan, Peng Quanqing, and Liu Guangjia. This standard refers to the International Organization for Legal Metrology (OIML), International Recommendation No. 35 "Common Length Measuring Tools" and Japanese Standard JIS B7522 "Cloth Tape Measure" part of the content.
From the date of implementation of this standard, the original Light Industry Ministry Standard SG167-1979 "Cloth Tape Measure" will be invalid. 501
Free download of various standard industry information
The "stress" point of the suspended pre-tensioning hammer should be parallel to the jaws and should not be skewed. e
A5 Test result processing
A5.1 If the test result does not meet the standard, twice the number of samples should be cut from the original sampling location for retesting. The retest results are qualified if both samples meet the standard.
A5.2 The calculation of the test results is expressed as the arithmetic mean, and the rounding method is used when calculating the average. Additional notes:
This standard is proposed by the Quality Standards Department of the Ministry of Light Industry. This standard is under the jurisdiction of the National Tool Hardware Standardization Center. This standard was drafted by the "Fiber Tape Measure Standard" working group. The main drafters of this standard are Xu Denghuan, Xu An, Shi Xinquan, Peng Quanqing, and Liu Guangjia. This standard adopts the International Organization for Legal Metrology (OIML), International Recommendation No. 35 "Common Length Measuring Tools" and part of the Japanese standard JIS B7522 "Cloth Tape Measure".
From the date of implementation of this standard, the former Light Industry Ministry Standard SG167-1979 "Cloth Tape Measure" will be invalid. 501
Free download of various standard industry information
The "stress" point of the suspended pre-tensioning hammer should be parallel to the jaws and should not be skewed. e
A5 Test result processing
A5.1 If the test result does not meet the standard, twice the number of samples should be cut from the original sampling location for retesting. The retest results are qualified if both samples meet the standard.
A5.2 The calculation of the test results is expressed as the arithmetic mean, and the rounding method is used when calculating the average. Additional notes:
This standard is proposed by the Quality Standards Department of the Ministry of Light Industry. This standard is under the jurisdiction of the National Tool Hardware Standardization Center. This standard was drafted by the "Fiber Tape Measure Standard" working group. The main drafters of this standard are Xu Denghuan, Xu An, Shi Xinquan, Peng Quanqing, and Liu Guangjia. This standard adopts the International Organization for Legal Metrology (OIML), International Recommendation No. 35 "Common Length Measuring Tools" and part of the Japanese standard JIS B7522 "Cloth Tape Measure".
From the date of implementation of this standard, the former Light Industry Ministry Standard SG167-1979 "Cloth Tape Measure" will be invalid. 501
Free download of various standard industry information
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