Some standard content:
Engineering Construction Standard Full Text Information System
ICS29.080.20
People's Republic of China Construction Industry Standard JG/T3053—1998
Flexible Metal Wire Protection Conduits
Flexiblemetalconduits
Published on January 4, 1999
Engineering Construction Standard Full Text Information System
Published by the Ministry of Construction of the People's Republic of China
Implemented on July 1, 1999
Engineering Construction Standard Full Text Information System
JG/T3053—1998
This standard is equivalent to Japan's JISC8309-1977 "Metal Flexible Wire Conduit" and refers to the international standard CEI/IEC614-2-6 "Wire Conduit for Electrical Equipment".
Appendix A of this standard is a prompt appendix.
This standard is proposed and managed by the Standard and Quota Research Institute of the Ministry of Construction. This standard is drafted by Yingkou Xinyuan Metal Conduit Co., Ltd. The main drafters of this standard are: Zhang Detang, Du Jingyun, Ling Quanxin. Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Construction Industry Standard of the People's Republic of China Flexible Metal Wire Protection Conduit
Flexiblemetalconduits
1 Scope
JG/T3053—1998
This standard specifies the classification, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of flexible metal wire protection conduits.
This standard applies to flexible metal wire protection conduits (hereinafter referred to as conduits). 2 Definitions
This standard adopts the following definitions.
2.1 Conduit
A pipe used to protect wires and cable wiring in electrical installations. Allows the insertion and replacement of wires and cables. 2.2 Flexible metal conduits are flexible metal conduits that can be bent freely. 2.3 Plastic-coated flexible metal conduits are flexible metal conduits that are coated with a layer of plastic (PVC). 3 Product classification and model
3.1 Product classification
Product classification should comply with the provisions of Table 1.
Flexible Metal Wire Protection Sleeve
Plastic Coated Flexible Metal Wire Protection Sleeve
3.2 Product Structure
3.2.1 The structure of the flexible metal wire protection sleeve is shown in Figure 1Y
Structural Type
The outer layer is galvanized steel strip, the middle layer is cold-rolled steel strip, and the inner layer is water-resistant electrical paper. A layer of plastic (PVC) is coated on the outer surface of the flexible metal wire protection sleeve. 1-Electrical paper; 2-Steel strip; 3-Galvanized steel strip Figure 1
2 The structure of the plastic coated flexible metal wire protection sleeve is shown in Figure 2. The Ministry of Construction of the People's Republic of China approved the engineering construction standard on January 4, 1999. Full Text Information System
1999-07-01 Implementation
Engineering Construction Standard Full Text Information System
3.3 Model
Category:
1-Electrical paper 2-Steel strip 3-Galvanized steel strip; 4-Polyvinyl chloride Figure 2
Product structure serial number (4, 5)
Category (Z, V)
Flexible metal wire protection sleeve
Z—The outer layer is galvanized steel strip
V—A layer of polyvinyl chloride (PVC) is coated on the outer layer of the galvanized steel strip Product structure serial number:
4—The outer layer is galvanized steel strip, the middle is cold-rolled steel strip, and the inner layer is water-resistant electrical paper; 5—A layer of polyvinyl chloride (PVC) is coated on the outer surface of type 4 flexible metal wire protection sleeve. Example 1: The model of the flexible metal wire protection sleeve with galvanized steel strip as the outer layer, cold-rolled steel strip as the interlayer and water-resistant electrical paper as the inner layer is: LZ-4
Example 2: The model of the flexible metal wire protection sleeve with a layer of polyvinyl chloride (PVC) coated on the outer surface of the LZ-4 type flexible metal wire protection sleeve is:
4 Technical requirements
4.1 Specifications and dimensions
4.1.1 The specifications of the flexible metal wire protection sleeve shall comply with the provisions of Table 2. Table 2
Specification code
Engineering Construction Standard Full-text Information System
Outer diameter tolerance
Length of each roll
Weight of each roll
Engineering Construction Standard Full-text Information System
Specification code
Weight of each roll, for reference only.
Table 2 (end)
Outer diameter tolerance
Length of each roll
10#, 12*, 15#, 17 casings are allowed to have two joints per roll, and the short head part shall not be less than 1500mm. 2
24#, 30#, 38, 50 casings are allowed to have one joint per roll, and the short head part shall not be less than 10000mm. 4.1.2
Plastic-coated flexible metal wire protection casings shall comply with the provisions of Table 3. Table 3
Specification code
The mass of each roll is for reference only.
Outer diameter tolerance
Thickness of ethylene layer
Length of each roll
25 000
25 000
10#, 12#, 15#, 17 casings are allowed to have two joints per roll, and the short head part shall not be less than 8000mm. 2
24#30#, 38#, 50# casings are allowed to have one joint per roll, and the short head part shall not be less than 5000mm. 4.2 Appearance requirements
4.2.1 The coating of the casing shall not fall off, peel, rust or have spots. Engineering Construction Standard Full Text Information System
1.8±0.25
Unit mass
Mass per roll
Mass per roll
Engineering Construction Standard Full Text Information System
4.2.2 The PVC layer of the plastic-coated flexible metal wire protection sleeve shall not be damaged or have bubbles. 4.2.3 There shall be no protrusions or damage inside and on the surface of the sleeve. 4.2.4 There shall be no burrs on the cut surface of the sleeve.
4.3 Performance requirements
4.3.1 Tensile properties
For 10#, 12#, and 15* sleeves, under a tensile load of 500N, and for the rest of the sleeves under a tensile load of 1000N for 15 minutes, the overlapping parts of the core materials shall not open, and the PVC layer shall not be damaged. 4.3.2 Compression performance
Apply force to the upper part of the casing, reaching 1250N within 30s, and continue for 1min. Its flatness should be less than 30%. 4.3.3 Bending performance
The casing is bent 90° four times in the left and right directions according to a certain radius of curvature. Each operation is carried out for 15s, and the state is maintained for 5min. There should be no cracks on its outer surface. Check the inner diameter of the casing with a gauge, and it can pass smoothly. 4.3.4 Electrical performance
The resistance of 10#, 12#, 15#, 17#, and 24 casings should be less than 0.052, and the resistance of other specifications of casings should be less than 0.032. 4.3.5 Corrosion resistance
The flexible metal wire protection casing is soaked in copper sulfate solution for 1min. After rinsing with clean water, there should be no copper coating on its surface. 4.3.6 Penetration resistance
Bend the plastic-coated flexible metal wire protection sleeve into a U shape and immerse it in water for 72 hours. There should be no water seepage in the sleeve. 4.3.7 Flame retardant performance
The end of the plastic-coated flexible metal wire protection sleeve contacts the fire source and burns for 30 seconds, the middle for 60 seconds, and it should be automatically extinguished within 30 seconds after evacuating the fire source. 4.4 Environmental requirements for use
a) Normal operating temperature: -20~40℃; b) Relative humidity: should not be greater than 98%;
c) It should be in an environment without corrosive gas. 5 Test method
5.1 Appearance
Use visual inspection method, and the results should meet the requirements of 4.2 of this standard. 5.2 Performance test
5.2.1 Tensile
5.2.1.1 Test equipment
Electronic universal testing machine.
5.2.1.2 Test method
Take three 300mm sleeves and place them on the workbench of the electronic universal testing machine. The test range is 2500N. Slowly apply the load to 1000N along the axial direction of the sample at a speed of 30mm/min and keep it for 15 minutes. The result should meet the requirements of 4.3.1 of this standard. 5.2.2 Compression test
5.2.2.1 Test equipment
a) Electronic universal testing machine;
b) Vernier caliper.
5.2.2.2 Test method
Take a 200mm sleeve, first use a caliper to measure the outer diameter D1, then place the sample radially on the worktable of the electronic universal testing machine, and then place a steel cube with a side length of 50mm in the middle of the sample, apply a load to the pressure block, increase it to 1250N at a speed of 30mm/min, hold it for 1min, and then use a caliper to measure the size D2 of the flat part of the sample, and calculate the flatness according to the following formula. The result should meet the requirements of 4.3.2. Engineering Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
5.2.3 Bending test
5.2.3.1 Test equipment
Flatness =
Bending testing machine and inner diameter gauge are shown in Appendix A (suggested Appendix). 5.2.3.2 Test method
Fix the sample vertically on the bending test machine according to Appendix A, and then select a roller with the same radius as the sample according to Table A1, install it on the bending test machine, and then bend the sample to the left by 90°. Restore verticality, bend to the right, and restore verticality again. Each operation is about 15 seconds. Do this four times in a row. Keep the bending state for 5 minutes for the last time. Tilt the bending test machine 45°, and then put the gauge from the top of the sample. The gauge should be able to pass smoothly.
5.2.4 Electrical test
5.2.4.1 Test equipment
Low resistance measuring instrument.
5.2.4.2 Test method
Take a 600mm bushing, mark two points on its surface with a distance of 500mm, and use a low resistance measuring instrument to measure the DC resistance between the two points. The result should meet the requirements of 4.3.4.
5.2.5 Corrosion resistance test
5.2.5.1 Test equipment
a) Beaker;
b) 1000W electric furnace,
c) 0～200℃ thermometer;
d) Glass test rod.
5.2.5.2 Test method
Take a 26% copper sulfate solution, take an appropriate amount of solution according to the different specifications of the sleeve, then take a 150mm long sleeve (the polyvinyl chloride layer of the plastic-coated sleeve should be peeled off) and insert it into the beaker for 1 minute, take it out and rinse it with clean water, repeat the test twice, and use a brush to remove the turbidity on the surface of the sleeve. The result should meet the requirements of 4.3.5.
5.2.6 Penetration resistance test
5.2.6.1 Test equipment
Water immersion tank.
5.2.6.2 Test method
Take a plastic-coated tube of appropriate length, bend it into a U shape, and immerse it in a tap water tank for 72 hours at room temperature. The result should meet the requirements of 4.3.6.
5.2.7 Flame retardancy test
5.2.7.1 Test equipment
a) Alcohol lamp;
b) Stopwatch.
5.2.7.2 Test method
Take a 300mm long plastic-coated tube, fix it horizontally on the test stand, and burn the plastic-coated tube at the outer flame of the alcohol lamp with an inner flame length of about 50mm for 30s at both ends and 60s in the middle, then evacuate the fire source, and the flame of the plastic-coated tube should automatically extinguish within 30s. 5.3 Environmental test methods
5.3.1 Low temperature test
5.3.1.1 Test equipment
Engineering construction standard full text information system
Engineering construction standard full text information system
Low temperature box.
5.3.1.2 Test method
Take a 300mm long sleeve and put it into the low temperature box, set the temperature of the low temperature box to -20℃±1℃, and keep it for 1h. Take out the sample and bend it freely by hand four times immediately. The bending radius shall not be less than six times the diameter of the sleeve. Check by visual inspection, the sleeve should have no cracks and no obvious deformation. 5.3.2 High temperature test
5.3.2.1 Test equipment
High temperature box.
5.3.2.2 Test method
Take a 300mm long sleeve and put it into the high temperature box, set the temperature of the high temperature box to 40℃±2℃, and keep it for 1h. Take out the sample and bend it by hand four times immediately. The bending radius shall not be less than six times the diameter of the casing. Visual inspection shall be used to check that the casing shall be free of cracks and obvious deformation. 5.3.3 Humidity test
5.3.3.1 Test equipment
Humidity box.
5.3.3.2 Test method
Take a 300mm long casing and put it into the humidity box. The temperature in the box is 30℃±5℃ and the humidity is 95%~98%. After 48 hours, take it out and observe the surface of the casing (the plastic-coated casing should be peeled off the film layer for observation). Slight rust is allowed. 6 Inspection rules
6.1 Factory inspection
6.1.1 Products must be inspected and qualified by the factory quality inspection department and the product certificate must be issued before they can leave the factory. 6.1.2 Factory inspection items include: logo, appearance, structure, and size. One work shift of the same model product is an inspection batch, and 5% of each batch of products is sampled.
6.2 Type inspection
6.2.1 Type inspection shall be conducted in any of the following cases: a) when new products are identified;
b) when there are major changes in design, process, or materials that may affect product performance; c) when production is resumed after being suspended for more than half a year; d) when normal continuous production is completed for one year;
e) when the quality supervision agency proposes type inspection. 6.2.2 Type inspection shall be conducted by sampling from products that have passed the factory inspection. Two groups may be selected, and three specifications are randomly selected from each group, with each specification taking 3.5m in length.
6.2.3 The inspection items are the full contents of this standard. 6.3 Judgment rules
6.3.1 All factory inspection
test items shall be qualified.
6.3.2 Type inspection
When one item of a specification does not meet the requirements, another set of samples of the corresponding specifications should be taken to re-test all technical performances. If one item still does not meet the requirements, the batch of products is deemed unqualified. 7 Marking, packaging, transportation and storage
7.1 Marking
7.1.1 Products should be marked when leaving the factory, see Table 4 for details. Engineering 6 Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Marking Content
Marking Method
Product Name
Product Model, Specification
Manufacturer Name
Factory Date
LZ Type Each roll of casing is pasted with self-adhesive tape at both ends. LV Type Each roll is printed with an offset printer at intervals of about 500mm. 7.1.2
A label with the following content is pasted on the outer packaging paper of each roll of product a) Product name;
b) Product model, specification;
c) Length of each roll;
d) Manufacturer's name;
e) Manufacturing batch number.
2 Packaging
Each roll of casing is wound into a disc, tied tightly with nylon packaging rope, then wrapped tightly with wrinkled packaging paper tape, and then glued with adhesive tape, and affixed with a certificate of conformity.
3 Transportation
Packaged products should be protected from exposure to sunlight, rain, snow and mechanical damage during transportation. 4 Storage
Packaged products should be stored in a warehouse that is not exposed to rain and snow and has no corrosive gas. The storage height should not exceed the height of 10 rolls. Engineering Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
Bending Tester
Appendix A
(Suggested Appendix)
Bending Tester and Internal Diameter Gauge
Internal Diameter Gauge
Table A1 specifies the length of the specimen, the radius of the roller and the outer diameter of the internal diameter gauge for various specifications. Table A1
Length of the specimen
The material of the internal diameter gauge is 45# carbon steel, with a surface roughness of 32
The material of the roller is red pine wood.
Engineering Construction Standard Full-text Information System
Radius R of the roller
Outer diameter D of the inner diameter gauge1 Test equipment
Low resistance measuring instrument.
5.2.4.2 Test method
Take a 600mm bushing, mark two points on its surface at a distance of 500mm, and use a low resistance measuring instrument to measure the DC resistance between the two points. The result should meet the requirements of 4.3.4.
5.2.5 Corrosion resistance test
5.2.5.1 Test equipment
a) Beaker;
b) 1000W electric furnace,
c) 0～200℃ thermometer;
d) Glass test rod.
5.2.5.2 Test method
Take a 26% copper sulfate solution, take an appropriate amount of solution according to the different specifications of the casing, then take a 150mm long casing (the polyvinyl chloride layer of the plastic-coated casing should be peeled off) and insert it into the beaker for 1 minute, take it out and rinse it with clean water, repeat the test twice, and use a brush to remove the turbidity on the surface of the casing. The result should meet the requirements of 4.3.5.
5.2.6 Penetration resistance test
5.2.6.1 Test equipment
Immersion tank.
5.2.6.2 Test method
Take an appropriate length of plastic-coated casing, bend it into a U shape, and immerse it in a tap water tank for 72 hours at room temperature. The result should meet the requirements of 4.3.6.
5.2.7 Flame retardancy test
5.2.7.1 Test equipment
a) Alcohol lamp;
b) Stopwatch.
5.2.7.2 Test method
Take a 300mm long plastic-coated tube and fix it horizontally on the test stand. Burn the plastic-coated tube at the outer flame of the alcohol lamp with an inner flame length of about 50mm for 30s at both ends and 60s in the middle. Then remove the fire source. The flame of the plastic-coated tube should automatically extinguish within 30s. 5.3 Environmental test method
5.3.1 Low temperature test
5.3.1.1 Test equipment
Engineering Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
Low temperature box.
5.3.1.2 Test method
Take a 300mm long sleeve and put it into a low temperature box, set the temperature of the low temperature box to -20℃±1℃, and keep it for 1h. Take out the sample and bend it freely by hand four times immediately. The bending radius shall not be less than six times the diameter of the sleeve. Visual inspection shows that the sleeve should have no cracks and no obvious deformation. 5.3.2 High temperature test
5.3.2.1 Test equipment
High temperature box.
5.3.2.2 Test method
Take a 300mm long sleeve and put it into a high temperature box, set the temperature of the high temperature box to 40℃±2℃, and keep it for 1h. Take out the sample and bend it freely by hand four times immediately. The bending radius shall not be less than six times the diameter of the sleeve. Visual inspection shows that the sleeve should have no cracks and no obvious deformation. 5.3.3 Humidity test
5.3.3.1 Test equipment
Humidity box.
5.3.3.2 Test method
Take a 300mm long sleeve and put it into a humid box. The temperature inside the box is 30℃±5℃ and the humidity is 95%~98%. After 48 hours, take it out and observe the surface of the sleeve (the plastic-coated sleeve should be peeled off and observed). Slight rust is allowed. 6 Inspection rules
6.1 Factory inspection
6.1.1 Products must be inspected and qualified by the factory quality inspection department and the product certificate must be issued before they can leave the factory. 6.1.2 Factory inspection items include: logo, appearance, structure, and size. One work shift of the same model product is an inspection batch, and 5% of each batch of products is randomly inspected.
6.2 Type inspection
6.2.1 Type inspection shall be conducted in any of the following cases: a) when new products are identified;
b) when there are major changes in design, process, or materials that may affect product performance; c) when production is resumed after being suspended for more than half a year; d) when normal continuous production is completed for one year;
e) when the quality supervision agency proposes type inspection. 6.2.2 Type inspection shall be conducted by sampling from products that have passed the factory inspection. Two groups may be selected, and three specifications are randomly selected from each group, with each specification taking 3.5m in length.
6.2.3 The inspection items are the full contents of this standard. 6.3 Judgment rules
6.3.1 All factory inspection
test items shall be qualified.
6.3.2 Type inspection
When one item of a specification does not meet the requirements, another set of samples of the corresponding specifications should be taken to re-test all technical performances. If one item still does not meet the requirements, the batch of products is deemed unqualified. 7 Marking, packaging, transportation and storage
7.1 Marking
7.1.1 Products should be marked when leaving the factory, see Table 4 for details. Engineering 6 Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Marking Content
Marking Method
Product Name
Product Model, Specification
Manufacturer Name
Factory Date
LZ Type Each roll of casing is pasted with self-adhesive tape at both ends. LV Type Each roll is printed with an offset printer at intervals of about 500mm. 7.1.2
A label with the following content is pasted on the outer packaging paper of each roll of product a) Product name;
b) Product model, specification;
c) Length of each roll;
d) Manufacturer's name;
e) Manufacturing batch number.
2 Packaging
Each roll of casing is wound into a disc, tied tightly with nylon packaging rope, then wrapped tightly with wrinkled packaging paper tape, and then glued with adhesive tape, and affixed with a certificate of conformity.
3 Transportation
Packaged products should be protected from exposure to sunlight, rain, snow and mechanical damage during transportation. 4 Storage
Packaged products should be stored in a warehouse that is not exposed to rain and snow and has no corrosive gas. The storage height should not exceed the height of 10 rolls. Engineering Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
Bending Tester
Appendix A
(Suggested Appendix)
Bending Tester and Internal Diameter Gauge
Internal Diameter Gauge
Table A1 specifies the length of the specimen, the radius of the roller and the outer diameter of the internal diameter gauge for various specifications. Table A1
Length of the specimen
The material of the internal diameter gauge is 45# carbon steel, with a surface roughness of 32
The material of the roller is red pine wood.
Engineering Construction Standard Full-text Information System
Radius R of the roller
Outer diameter D of the inner diameter gauge1 Test equipment
Low resistance measuring instrument.
5.2.4.2 Test method
Take a 600mm bushing, mark two points on its surface at a distance of 500mm, and use a low resistance measuring instrument to measure the DC resistance between the two points. The result should meet the requirements of 4.3.4.
5.2.5 Corrosion resistance test
5.2.5.1 Test equipment
a) Beaker;
b) 1000W electric furnace,
c) 0～200℃ thermometer;
d) Glass test rod.
5.2.5.2 Test method
Take a 26% copper sulfate solution, take an appropriate amount of solution according to the different specifications of the casing, then take a 150mm long casing (the polyvinyl chloride layer of the plastic-coated casing should be peeled off) and insert it into the beaker for 1 minute, take it out and rinse it with clean water, repeat the test twice, and use a brush to remove the turbidity on the surface of the casing. The result should meet the requirements of 4.3.5.
5.2.6 Penetration resistance test
5.2.6.1 Test equipment
Immersion tank.
5.2.6.2 Test method
Take an appropriate length of plastic-coated casing, bend it into a U shape, and immerse it in a tap water tank for 72 hours at room temperature. The result should meet the requirements of 4.3.6.
5.2.7 Flame retardancy test
5.2.7.1 Test equipment
a) Alcohol lamp;
b) Stopwatch.
5.2.7.2 Test method
Take a 300mm long plastic-coated tube and fix it horizontally on the test stand. Burn the plastic-coated tube at the outer flame of the alcohol lamp with an inner flame length of about 50mm for 30s at both ends and 60s in the middle. Then remove the fire source. The flame of the plastic-coated tube should automatically extinguish within 30s. 5.3 Environmental test method
5.3.1 Low temperature test
5.3.1.1 Test equipment
Engineering Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
Low temperature box.
5.3.1.2 Test method
Take a 300mm long sleeve and put it into a low temperature box, set the temperature of the low temperature box to -20℃±1℃, and keep it for 1h. Take out the sample and bend it freely by hand four times immediately. The bending radius shall not be less than six times the diameter of the sleeve. Visual inspection shows that the sleeve should have no cracks and no obvious deformation. 5.3.2 High temperature test
5.3.2.1 Test equipment
High temperature box.
5.3.2.2 Test method
Take a 300mm long sleeve and put it into a high temperature box, set the temperature of the high temperature box to 40℃±2℃, and keep it for 1h. Take out the sample and bend it freely by hand four times immediately. The bending radius shall not be less than six times the diameter of the sleeve. Visual inspection shows that the sleeve should have no cracks and no obvious deformation. 5.3.3 Humidity test
5.3.3.1 Test equipment
Humidity box.
5.3.3.2 Test method
Take a 300mm long sleeve and put it into a humid box. The temperature inside the box is 30℃±5℃ and the humidity is 95%~98%. After 48 hours, take it out and observe the surface of the sleeve (the plastic-coated sleeve should be peeled off and observed). Slight rust is allowed. 6 Inspection rules
6.1 Factory inspection
6.1.1 Products must be inspected and qualified by the factory quality inspection department and the product certificate must be issued before they can leave the factory. 6.1.2 Factory inspection items include: logo, appearance, structure, and size. One work shift of the same model product is an inspection batch, and 5% of each batch of products is randomly inspected.
6.2 Type inspection
6.2.1 Type inspection shall be conducted in any of the following cases: a) when new products are identified;
b) when there are major changes in design, process, or materials that may affect product performance; c) when production is resumed after being suspended for more than half a year; d) when normal continuous production is completed for one year;
e) when the quality supervision agency proposes type inspection. 6.2.2 Type inspection shall be conducted by sampling from products that have passed the factory inspection. Two groups may be selected, and three specifications are randomly selected from each group, with each specification taking 3.5m in length.
6.2.3 The inspection items are the full contents of this standard. 6.3 Judgment rules
6.3.1 All factory inspection
test items shall be qualified.
6.3.2 Type inspection
When one item of a specification does not meet the requirements, another set of samples of the corresponding specifications should be taken to re-test all technical performances. If one item still does not meet the requirements, the batch of products is deemed unqualified. 7 Marking, packaging, transportation and storage
7.1 Marking
7.1.1 Products should be marked when leaving the factory, see Table 4 for details. Engineering 6 Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Marking Content
Marking Method
Product Name
Product Model, Specification
Manufacturer Name
Factory Date
LZ Type Each roll of casing is pasted with self-adhesive tape at both ends. LV Type Each roll is printed with an offset printer at intervals of about 500mm. 7.1.2
A label with the following content is pasted on the outer packaging paper of each roll of product a) Product name;
b) Product model, specification;
c) Length of each roll;
d) Manufacturer's name;
e) Manufacturing batch number.
2 Packaging
Each roll of casing is wound into a disc, tied tightly with nylon packaging rope, then wrapped tightly with wrinkled packaging paper tape, and then glued with adhesive tape, and affixed with a certificate of conformity.
3 Transportation
Packaged products should be protected from exposure to sunlight, rain, snow and mechanical damage during transportation. 4 Storage
Packaged products should be stored in a warehouse that is not exposed to rain and snow and has no corrosive gas. The storage height should not exceed the height of 10 rolls. Engineering Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
Bending Tester
Appendix A
(Suggested Appendix)
Bending Tester and Internal Diameter Gauge
Internal Diameter Gauge
Table A1 specifies the length of the specimen, the radius of the roller and the outer diameter of the internal diameter gauge for various specifications. Table A1
Length of the specimen
The material of the internal diameter gauge is 45# carbon steel, with a surface roughness of 32
The material of the roller is red pine wood.
Engineering Construction Standard Full-text Information System
Radius R of the roller
Outer diameter D of the inner diameter gauge2 Test method
Take a 300mm long sleeve and put it into a low temperature box, set the temperature of the low temperature box to -20℃±1℃, and keep it for 1h. Take out the sample and bend it freely by hand four times immediately. The bending radius shall not be less than six times the diameter of the sleeve. Visual inspection shows that the sleeve should have no cracks and no obvious deformation. 5.3.2 High temperature test
5.3.2.1 Test equipmentbZxz.net
High temperature box.
5.3.2.2 Test method
Take a 300mm long sleeve and put it into a high temperature box, set the temperature of the high temperature box to 40℃±2℃, and keep it for 1h. Take out the sample and bend it freely by hand four times immediately. The bending radius shall not be less than six times the diameter of the sleeve. Visual inspection shows that the sleeve should have no cracks and no obvious deformation. 5.3.3 Humidity test
5.3.3.1 Test equipment
Humidity box.
5.3.3.2 Test method
Take a 300mm long sleeve and put it into a humid box. The temperature inside the box is 30℃±5℃ and the humidity is 95%~98%. After 48 hours, take it out and observe the surface of the sleeve (the plastic-coated sleeve should be peeled off and observed). Slight rust is allowed. 6 Inspection rules
6.1 Factory inspection
6.1.1 Products must be inspected and qualified by the factory quality inspection department and the product certificate must be issued before they can leave the factory. 6.1.2 Factory inspection items include: logo, appearance, structure, and size. One work shift of the same model product is an inspection batch, and 5% of each batch of products is randomly inspected.
6.2 Type inspection
6.2.1 Type inspection shall be conducted in any of the following cases: a) when new products are identified;
b) when there are major changes in design, process, or materials that may affect product performance; c) when production is resumed after being suspended for more than half a year; d) when normal continuous production is completed for one year;
e) when the quality supervision agency proposes type inspection. 6.2.2 Type inspection shall be conducted by sampling from products that have passed the factory inspection. Two groups may be selected, and three specifications are randomly selected from each group, with each specification taking 3.5m in length.
6.2.3 The inspection items are the full contents of this standard. 6.3 Judgment rules
6.3.1 All factory inspection
test items shall be qualified.
6.3.2 Type inspection
When one item of a specification does not meet the requirements, another set of samples of the corresponding specifications should be taken to re-test all technical performances. If one item still does not meet the requirements, the batch of products is deemed unqualified. 7 Marking, packaging, transportation and storage
7.1 Marking
7.1.1 Products should be marked when leaving the factory, see Table 4 for details. Engineering 6 Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Marking Content
Marking Method
Product Name
Product Model, Specification
Manufacturer Name
Factory Date
LZ Type Each roll of casing is pasted with self-adhesive tape at both ends. LV Type Each roll is printed with an offset printer at intervals of about 500mm. 7.1.2
A label with the following content is pasted on the outer packaging paper of each roll of product a) Product name;
b) Product model, specification;
c) Length of each roll;
d) Manufacturer's name;
e) Manufacturing batch number.
2 Packaging
Each roll of casing is wound into a disc, tied tightly with nylon packaging rope, then wrapped tightly with wrinkled packaging paper tape, and then glued with adhesive tape, and affixed with a certificate of conformity.
3 Transportation
Packaged products should be protected from exposure to sunlight, rain, snow and mechanical damage during transportation. 4 Storage
Packaged products should be stored in a warehouse that is not exposed to rain and snow and has no corrosive gas. The storage height should not exceed the height of 10 rolls. Engineering Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
Bending Tester
Appendix A
(Suggested Appendix)
Bending Tester and Internal Diameter Gauge
Internal Diameter Gauge
Table A1 specifies the length of the specimen, the radius of the roller and the outer diameter of the internal diameter gauge for various specifications. Table A1
Length of the specimen
The material of the internal diameter gauge is 45# carbon steel, with a surface roughness of 32
The material of the roller is red pine wood.
Engineering Construction Standard Full-text Information System
Radius R of the roller
Outer diameter D of the inner diameter gauge2 Test method
Take a 300mm long sleeve and put it into a low temperature box, set the temperature of the low temperature box to -20℃±1℃, and keep it for 1h. Take out the sample and bend it freely by hand four times immediately. The bending radius shall not be less than six times the diameter of the sleeve. Visual inspection shows that the sleeve should have no cracks and no obvious deformation. 5.3.2 High temperature test
5.3.2.1 Test equipment
High temperature box.
5.3.2.2 Test method
Take a 300mm long sleeve and put it into a high temperature box, set the temperature of the high temperature box to 40℃±2℃, and keep it for 1h. Take out the sample and bend it freely by hand four times immediately. The bending radius shall not be less than six times the diameter of the sleeve. Visual inspection shows that the sleeve should have no cracks and no obvious deformation. 5.3.3 Humidity test
5.3.3.1 Test equipment
Humidity box.
5.3.3.2 Test method
Take a 300mm long sleeve and put it into a humid box. The temperature inside the box is 30℃±5℃ and the humidity is 95%~98%. After 48 hours, take it out and observe the surface of the sleeve (the plastic-coated sleeve should be peeled off and observed). Slight rust is allowed. 6 Inspection rules
6.1 Factory inspection
6.1.1 Products must be inspected and qualified by the factory quality inspection department and the product certificate must be issued before they can leave the factory. 6.1.2 Factory inspection items include: logo, appearance, structure, and size. One work shift of the same model product is an inspection batch, and 5% of each batch of products is randomly inspected.
6.2 Type inspection
6.2.1 Type inspection shall be conducted in any of the following cases: a) when new products are identified;
b) when there are major changes in design, process, or materials that may affect product performance; c) when production is resumed after being suspended for more than half a year; d) when normal continuous production is completed for one year;
e) when the quality supervision agency proposes type inspection. 6.2.2 Type inspection shall be conducted by sampling from products that have passed the factory inspection. Two groups may be selected, and three specifications are randomly selected from each group, with each specification taking 3.5m in length.
6.2.3 The inspection items are the full contents of this standard. 6.3 Judgment rules
6.3.1 All factory inspection
test items shall be qualified.
6.3.2 Type inspection
When one item of a specification does not meet the requirements, another set of samples of the corresponding specifications should be taken to re-test all technical performances. If one item still does not meet the requirements, the batch of products is deemed unqualified. 7 Marking, packaging, transportation and storage
7.1 Marking
7.1.1 Products should be marked when leaving the factory, see Table 4 for details. Engineering 6 Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Marking Content
Marking Method
Product Name
Product Model, Specification
Manufacturer Name
Factory Date
LZ Type Each roll of casing is pasted with self-adhesive tape at both ends. LV Type Each roll is printed with an offset printer at intervals of about 500mm. 7.1.2
A label with the following content is pasted on the outer packaging paper of each roll of product a) Product name;
b) Product model, specification;
c) Length of each roll;
d) Manufacturer's name;
e) Manufacturing batch number.
2 Packaging
Each roll of casing is wound into a disc, tied tightly with nylon packaging rope, then wrapped tightly with wrinkled packaging paper tape, and then glued with adhesive tape, and affixed with a certificate of conformity.
3 Transportation
Packaged products should be protected from exposure to sunlight, rain, snow and mechanical damage during transportation. 4 Storage
Packaged products should be stored in a warehouse that is not exposed to rain and snow and has no corrosive gas. The storage height should not exceed the height of 10 rolls. Engineering Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
Bending Tester
Appendix A
(Suggested Appendix)
Bending Tester and Internal Diameter Gauge
Internal Diameter Gauge
Table A1 specifies the length of the specimen, the radius of the roller and the outer diameter of the internal diameter gauge for various specifications. Table A1
Length of the specimen
The material of the internal diameter gauge is 45# carbon steel, with a surface roughness of 32
The material of the roller is red pine wood.
Engineering Construction Standard Full-text Information System
Radius R of the roller
Outer diameter D of the inner diameter gauge
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