Some standard content:
JG/T3027-1995 Construction Industry Standard of the People's Republic of China
Accelerated curing tank for concrete
Accelerated curing tank for concrete1995-10-06 Issued
The Ministry of Construction of the People's Republic of China Issued
1996-05-01 Implementation
JG/T3027-1995
This standard is not equivalent to ASTMC68489 Standard Test Method for Preparation, Accelerated Curing and Testing of Concrete Compression Test Blocks" Appendix X1 "Curing Equipment".
This standard was proposed by the Standard and Quota Research Institute of the Ministry of Construction. This standard is under the jurisdiction of the China Academy of Building Research, the unit responsible for the standard technology of construction engineering. This standard was drafted by Jiangsu Academy of Building Research, Ningbo Building Materials Equipment and Instrument Factory, Beijing Power Machinery Parts Factory, and Suzhou Wuxian Dongwu Testing Instrument Co., Ltd.
This standard is entrusted to Jiangsu Academy of Building Research for interpretation. The main drafters of this standard are Wang Chaochang, Fei Hongliang, Wang Jingzhou, Wang Leichang and Hu Xiupei. 1 Scope
Construction Industry Standard of the People's Republic of China Accelerated Curing Tank for Concrete
Accelerated curing tank for concrete JG/T3027--1995
This standard specifies the specifications, models, technical requirements, test methods, inspection rules and markings, packaging, transportation, storage and other contents of the accelerated curing tank for concrete used in the laboratory (referred to as the accelerated curing tank). This standard applies to the design, production and quality inspection of accelerated curing tanks for concrete. 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards are subject to revision, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB998--82 Basic test methods for low-voltage electrical appliances GB5574--85 Industrial vulcanized rubber sheets
JGJ15-83 Early estimated concrete strength test methods 3 Product classification and model
3.1 Accelerated curing boxes are divided into the following according to their structural characteristics: a) Integral accelerated curing boxes in which the electrical control part and the box body form an integral whole. b) Separate accelerated curing boxes in which the electrical control part and the box body are separated. 3.2 Model
The accelerated curing box model consists of the accelerated curing box code, structural feature code and working box length (divided into three types: 920mm, 850mm and 700mm). The models and meanings are as follows:
3.3 Model examples
Working box length (mm)
Structural feature code: Z——integral type; F——separate type Accelerated curing box for concrete testing code: JY3.3.1JYZ920JG/T30271995
Indicates an integral accelerated curing box, whose working box length is 920mm. 3.3.2JYF850JG/T3027—1995
Indicates a separate accelerated curing box, whose working box length is 850mm. Approved by the Ministry of Construction of the People's Republic of China on October 6, 1995 and implemented on May 1, 1996
4 Technical requirements
JG/T3027-1995
4.1 Accelerated curing boxes shall comply with the requirements of this standard and be manufactured according to the drawings and technical documents approved by the prescribed procedures. 4.2 The accelerated curing box consists of a box body, a box cover, a heater, and automatic control instruments (including temperature measurement and control instruments, time controllers, and leakage protection devices). Its structural scheme is shown in Figure 1. 1-Box cover; 2-Temperature monitoring device; 3-Safety venting device; 4-Power supply; 5-Automatic control instrument; 6-Full power protection device; 7-Test piece rack; 8-Heater; 9-Box body; 10-Castors Figure 1 Schematic diagram of the structure of the concrete accelerated curing box 4.3 Conditions of use 4.3.1 Operating environment Ambient temperature: 0~40℃, Ambient humidity: Relative humidity is not more than 85%. 4.3.2 Power supply voltage: 380±38V or 220±22V; Power supply rate: 50±0.5H2, 4.4 Working performance of accelerated curing box 4.4.1 The curing temperature range of the accelerated curing box is 20℃~100℃, and the longest temperature control time is 24h. 4.4.2 The accelerated curing box should be equipped with a cover to display the water temperature and constant temperature time. The water temperature at any point above the pen board in the box is required to be within ±2℃ of the specified temperature; the constant temperature time control requirement is that the error does not exceed ±2min within 24h. 4.4.3 The heater of the accelerated curing box should use an immersed electric heating tube. The immersed heater should be located in the center of the plane and the interval with the bottom of the box should not exceed 30mm. The power of the electric heating tube should be adapted to the size of the working box. One group of electric heating tubes is used for constant temperature, and the other group of electric heating tubes with higher power is used for heating, so that the water temperature in the box returns to the specified temperature within 15 minutes after the specimen is immersed. 4.4.4 The accelerated curing box should use an automatic temperature regulator to control the temperature, and its control accuracy is the specified temperature ± 2°C; the accelerated curing box should be equipped with a temperature monitoring device that can continuously record or regularly measure the water temperature during the curing process. 4.4.5 The accelerated curing box should have a timing alarm device to issue an alarm signal when the set constant temperature time is reached. 4.5 Structure and material properties
4.5.1 The accelerated curing box should be made of materials with sufficient strength and corrosion resistance, and the lining and heater should be made of stainless steel or copper. The working box should be reliably sealed without air leakage or water seepage. 2
JG/T3027-1995
4.5.2 The dimension deviation of the working box should not be greater than ±5mm, and the angles between the adjacent sides and the sides and the bottom plate should be right angles, and the right angle error should not be greater than ±1°.
4.5.3 Insulation performance
The accelerated curing box should have good insulation performance. The box body is composed of an outer shell and an inner lining, with a certain thickness of insulation layer in between. The layer can be made of materials such as rock wool, expanded perlite or glass fiber, and the materials used should not have obvious shrinkage and deformation. 4.5.4 Air tightness
The box body should have a lid that fits tightly, opens freely, and has an insulation layer. The connection surface is required to be heat-sealed. A water seal groove can be used. The effective depth of the water seal groove is not less than 25mm. It can also be sealed with a sealing rubber strip gasket. When the box cover is closed, there should be no gap to prevent the hot air in the box from escaping. Considering the safety of use, a safety air release valve should be set on the box body. 4.5.5 Durability of box cover hinges and handles
The box cover hinges and handles should have sufficient strength and a certain degree of corrosion resistance, and should be made of materials such as stainless steel. According to 5.9, the durability test should be carried out. After the box cover has been opened and closed for 600 times, there should be no damage and the airtightness should not be damaged. 4.5.6 Test piece rack, casters and drain valve
The test piece rack in the box and the casters at the bottom of the box should have sufficient mechanical strength. The test piece rack includes the grate plate and the grate bracket, which should have sufficient rigidity. The grate plate should be easy to move when in use. When the drain valve is opened, the water in the box can be drained. The inner diameter of the drain pipe should be greater than 10tmm. 4.5.7 Firmness of the accelerated curing box
The various fasteners on the accelerated curing box should be firm and reliable, and resistant to vibration. After transportation and normal use, looseness and other undesirable phenomena should not occur. 4.5.8 Appearance requirements
The appearance should not have obvious defects, the coating surface should be flat and bright, the color should be consistent, the color should be uniform, and the coating should be firm. Electroplated parts should be smooth and fine, with uniform color, and should not have defects such as bubbles and coating peeling. The surface of plastic parts should be flat and smooth, with uniform color, and should not have defects such as deformation. 4.6 Electrical safety
The accelerated curing box body should have obvious grounding marks, and the insulation resistance between the live parts and the box body should not be less than 2MQ. The electrical control system should be equipped with a leakage protection panel, which should be safe and reliable. 5 Test method
5.1 Working box size measurement
The working box size is measured with a steel tape measure. The angles between adjacent sides and each side and the bottom plate are measured with a right-angle gauge and a plug gauge. 5.2 Temperature uniformity test
5.2.1 Water temperature measuring points
In the concrete accelerated curing box, three measuring points are set at the horizontal plane 50mm above the pen board and 50mm below the water surface to form an equilateral triangle, and the two equilateral triangles are arranged in an inverted shape. The side length of the equilateral triangle should be greater than 300mm. 5.2.2 Measurement method
Temperature measurement can be carried out by thermocouples or other temperature measuring devices of equal accuracy. Measure once every half an hour in the 55℃ warm water and 80℃ hot water indicated by the temperature controller, for a total of 8 times, including one measurement at two water temperatures, when the thermostat is powered off and started. The results obtained at each point should comply with the provisions of Articles 4.4.2 and 4.4.4.
5.3 Accelerated curing box heat source power test
Prepare concrete cube specimens with formwork, the number of which is equal to the number of loading specimens designed for the accelerated curing box. When the water in the box is heated to the indicated water temperature (80C or boiling water can be selected), immerse all the test pieces in the water in the box, close the box cover, and measure the time to return to the specified temperature. The results obtained should comply with the provisions of Article 4.4.3. 5.4 Constant temperature time accuracy test
Set the time control to 24h, and use a qualified timer to check the accuracy of the time controller. The test results should comply with the provisions of Article 4.4.2. 3
5.5 Load test
JG/T3027-1995
5.5.1 The load of the accelerated curing box is determined according to the size of the working box. The test uses concrete cube specimens with formwork, the number of which is equal to the number of loading specimens designed.
5.5.2 Heat the water temperature in the accelerated curing box to 55℃, discharge all the test pieces and immerse them in water, wait for the water temperature in the box to return to 55℃±2℃, and then keep the temperature constant for 24h. Within 24h, measure the uniformity of the water temperature and check the accuracy of the time controller and the working state of the heat source of the accelerated curing box every 8h.
5.6 Air tightness test of the box cover
5.6.1 Air tightness test of the gasket-type sealed box cover Before the test, place the accelerated curing box at room temperature without power. Take a piece of paper with a thickness of 0.08mm, a width of 50mm, and a length of 200mm and place it at any point on the sealing strip. Close the box cover and press it vertically on the paper. Pull the paper, and the paper should not slide freely. 5.6.2 Air tightness test of the water-sealed sealed box cover The accelerated curing box is placed at room temperature, and the water temperature in the box is heated to 95℃. There should be no hot air escaping from the seal. 5.7 Test of thermal insulation performance of the box
The accelerated curing box is placed in an environment with a room temperature of 20℃±3℃, clean water is injected into the box to 30mm from the box opening, the box cover is closed, the power is turned on, and when the water temperature is heated to 80C, the power is turned off. Measure the temperature of the water in the box, and the results obtained should comply with the provisions of Table 1. Table 1
Standing time, h
Water humidity in the box, C
5.8 Insulation resistance measurement
Use a DC 500V megohmmeter in the hot state to measure between any pole of the power supply line and the machine body, and the results should comply with the provisions of Article 4.6 of this standard.
5.9 Durability test of the box cover hinge and handle The accelerated curing box is placed stably at room temperature without power. The opening angle of the box cover should be greater than 90°. One opening and one closing is one cycle. The normal number of cycles is 10 times per minute. After the test is completed according to the number of times specified in Article 4.5.5, an inspection is carried out, and the results should comply with the provisions of Articles 4.5.4 and 4.5.5.
5.10 Mechanical strength test of specimen rack and caster The accelerated curing box is placed at room temperature, with pads at the four corners and no power is applied. The prepared concrete cube specimens are placed on the sub-board in sequence according to the designed loading number, and the box cover is closed. After the test for 1 hour, the specimens are taken out, and the sub-bracket and pen sub-board are observed and inspected. No deformation is required. The four corner blocks are taken out, the curing box is moved, and the working state of the caster is checked to be normal. 5.11 Appearance inspection
Visually inspect the coating surface. There should be no obvious flow scars, scratches, wrinkles, bubbles, missing coatings, and aggregated sand particles. The coating, electroplating parts, and plastic parts of the box body should comply with the provisions of Article 4.5.8.
5.12 Transport test
Place the package on the car and secure it, and drive it for 50 km on a third-class highway. After the test, check whether the appearance of the accelerated curing box package is damaged. After removing the packaging box, conduct a complete machine installation firmness inspection, and the results should comply with the provisions of Articles 4.5.7 and 7.2. 6 Inspection rules
6.1 Inspection classification
The inspection of the accelerated curing box is divided into type inspection and factory inspection. 6.1.1 Type inspection Type inspection should be carried out in any of the following situations: a) Trial design and appraisal of new products or old products for transfer to factory production; b) After formal production, if there are major changes in structure, materials, and processes that may affect product performance; at least once a year during normal production; when production is resumed after a shutdown of more than half a year (including half a year); when the results of the outgoing inspection are significantly different from the last type inspection; when the national quality supervision agency proposes a requirement for type inspection. 6.1.2
Factory inspection. For products that have passed the type inspection and are officially put into production, the manufacturer's quality inspection department should inspect them according to the factory inspection items before they leave the factory, and only those that pass the inspection are allowed to leave the factory. 6.2
See Table 2 for various inspection items for accelerated curing boxes. Table 2 Inspection items
Appearance inspection
Inspection items
Work box size measurement
Water temperature and uniformity test inside the box
Heat source power series test
Constant temperature time accuracy test
Box cover air tightness test
Box insulation performance test
Electrical safety test
Test piece rack mechanical strength test
Castor working status inspection
Load test
Box cover Durability test for hinges and handles
Transportation test
6.3 Judgment rules
Type inspection
Judgment basis
(Subject to this standard)
4.5.7,4.5.8
Type inspection
Factory inspection
Two units of each model of product are randomly selected and inspected according to the type inspection items in Table 2, and the main items of each test must all meet the corresponding technical requirements of this standard. Among the general items inspected, if more than one item fails to meet the requirements, the type inspection will not be passed. If one of the general items inspected fails to meet the requirements, double sampling should be done from the batch of products to repeat the inspection of the unqualified item. If all the re-inspected items meet the requirements of this standard, the item can be judged as qualified. If there is still one item that fails to meet the requirements of this standard, the type inspection will not be passed.
6.3.2 Factory inspection
Each accelerated curing box leaving the factory shall be inspected according to the inspection items specified in Table 2. Only those that pass all the inspections can leave the factory. 7 Marking, packaging, transportation, storage
7.1 Marking
7.1.1Each accelerated curing box shall have a durable nameplate in an appropriate and obvious position. The following contents shall be clearly marked on the nameplate: a)
Product name and model;
Curating temperature range;
Control time range;
Rated voltage, V;
Rated frequency, Hz;
Total input power, W;
Net weight, kg;
Manufacturer name;
Manufacture date and number.
Registered Trademark
Packaging Mark
JG/T3027-1995
The outer surface of the packaging box shall be painted with non-fading paint, and the following marks shall be clearly marked: a)
Full name of the manufacturer;
Product name and model;
Trademark;
Net weight, kg; Gross weight, kg;
Outer dimensions of the packaging box: length × width × height, mm; Transportation precautions: Handle with care, moisture-proof, upward, number of layers that can be delivered, etc., or symbols, patterns, etc. 7.2 Packaging
The accelerated curing box shall be packed in a firm packaging box. After the transportation test according to Article 5.12, the packaging box shall not be obviously damaged or deformed. Each accelerated curing box shall be accompanied by an instruction manual, a certificate of inspection, a product warranty sheet and a packing list when it leaves the factory. 7.3 Transportation and Storage
During transportation and storage, the product should not be dropped, bumped, or wetted by rain or snow. The product should be stored in a well-ventilated warehouse with an ambient air temperature of -30℃~40℃ and a relative humidity of no more than 85%. There should be no corrosive gas around.
7.4 Warranty Period
If the user complies with the storage, installation and use regulations, the accelerated curing box will be repaired or replaced free of charge by the manufacturer within one year from the date of purchase if there is any failure.2 The water temperature in the accelerated curing box is heated to 55℃, and all the test pieces are discharged and immersed in water. After the water temperature in the box returns to 55℃±2℃, the temperature is kept constant for 24 hours. Within 24 hours, the water temperature uniformity and the accuracy of the time controller and the working state of the heat source of the accelerated curing box are measured every 8 hours.
5.6 Air tightness test of box cover
5.6.1 For the air tightness test of the gasket-type sealed box cover, the accelerated curing box is placed at room temperature before the test without power. Take a piece of paper with a thickness of 0.08mm, a width of 50mm, and a length of 200mm and place it at any point on the sealing strip. Close the box cover and press it vertically on the paper. Pull the paper, and the paper should not slide freely. 5.6.2 For the air tightness test of the water-sealed sealed box cover, the accelerated curing box is placed at room temperature, and the water temperature in the box is heated to 95℃. There should be no hot air escaping from the seal. 5.7 Test of thermal insulation performance of the box
The accelerated curing box is placed in an environment with a room temperature of 20℃±3℃, clean water is injected into the box to 30mm from the box opening, the box cover is closed, the power is turned on, and when the water temperature is heated to 80C, the power is turned off. Measure the temperature of the water in the box, and the results obtained should comply with the provisions of Table 1. Table 1
Standing time, h
Water humidity in the box, C
5.8 Insulation resistance measurement
Use a DC 500V megohmmeter in the hot state to measure between any pole of the power supply line and the machine body, and the results should comply with the provisions of Article 4.6 of this standard.
5.9 Durability test of the box cover hinge and handle The accelerated curing box is placed stably at room temperature without power. The opening angle of the box cover should be greater than 90°. One opening and one closing is one cycle. The normal number of cycles is 10 times per minute. After the test is completed according to the number of times specified in Article 4.5.5, an inspection is carried out, and the results should comply with the provisions of Articles 4.5.4 and 4.5.5.
5.10 Mechanical strength test of specimen rack and caster The accelerated curing box is placed at room temperature, with pads at the four corners and no power is applied. The prepared concrete cube specimens are placed on the sub-board in sequence according to the designed loading number, and the box cover is closed. After the test for 1 hour, the specimens are taken out, and the sub-bracket and pen sub-board are observed and inspected. No deformation is required. The four corner blocks are taken out, the curing box is moved, and the working state of the caster is checked to be normal. 5.11 Appearance inspection
Visually inspect the coating surface. There should be no obvious flow scars, scratches, wrinkles, bubbles, missing coatings, and aggregated sand particles. The coating, electroplating parts, and plastic parts of the box body should comply with the provisions of Article 4.5.8.
5.12 Transport test
Place the package on the car and secure it, and drive it for 50 km on a third-class highway. After the test, check whether the appearance of the accelerated curing box package is damaged. After removing the packaging box, conduct a complete machine installation firmness inspection, and the results should comply with the provisions of Articles 4.5.7 and 7.2. 6 Inspection rules
6.1 Inspection classification
The inspection of the accelerated curing box is divided into type inspection and factory inspection. 6.1.1 Type inspection Type inspection should be carried out in any of the following situations: a) Trial design and appraisal of new products or old products for transfer to factory production; b) After formal production, if there are major changes in structure, materials, and processes that may affect product performance; at least once a year during normal production; when production is resumed after a shutdown of more than half a year (including half a year); when the results of the outgoing inspection are significantly different from the last type inspection; when the national quality supervision agency proposes a requirement for type inspection. 6.1.2
Factory inspection. For products that have passed the type inspection and are officially put into production, the manufacturer's quality inspection department should inspect them according to the factory inspection items before they leave the factory, and only those that pass the inspection are allowed to leave the factory. 6.2
See Table 2 for various inspection items for accelerated curing boxes. Table 2 Inspection items
Appearance inspection
Inspection items
Work box size measurement
Water temperature and uniformity test inside the box
Heat source power series test
Constant temperature time accuracy test
Box cover air tightness test
Box insulation performance test
Electrical safety test
Test piece rack mechanical strength test
Castor working status inspection
Load test
Box cover Durability test for hinges and handles
Transportation test
6.3 Judgment rules
Type inspection
Judgment basis
(Subject to this standard)bZxz.net
4.5.7,4.5.8
Type inspection
Factory inspection
Two units of each model of product are randomly selected and inspected according to the type inspection items in Table 2, and the main items of each test must all meet the corresponding technical requirements of this standard. Among the general items inspected, if more than one item fails to meet the requirements, the type inspection will not be passed. If one of the general items inspected fails to meet the requirements, double sampling should be done from the batch of products to repeat the inspection of the unqualified item. If all the re-inspected items meet the requirements of this standard, the item can be judged as qualified. If there is still one item that fails to meet the requirements of this standard, the type inspection will not be passed.
6.3.2 Factory inspection
Each accelerated curing box leaving the factory shall be inspected according to the inspection items specified in Table 2. Only those that pass all the inspections can leave the factory. 7 Marking, packaging, transportation, storage
7.1 Marking
7.1.1Each accelerated curing box shall have a durable nameplate in an appropriate and obvious position. The following contents shall be clearly marked on the nameplate: a)
Product name and model;
Curating temperature range;
Control time range;
Rated voltage, V;
Rated frequency, Hz;
Total input power, W;
Net weight, kg;
Manufacturer name;
Manufacture date and number.
Registered Trademark
Packaging Mark
JG/T3027-1995
The outer surface of the packaging box shall be painted with non-fading paint, and the following marks shall be clearly marked: a)
Full name of the manufacturer;
Product name and model;
Trademark;
Net weight, kg; Gross weight, kg;
Outer dimensions of the packaging box: length × width × height, mm; Transportation precautions: Handle with care, moisture-proof, upward, number of layers that can be delivered, etc., or symbols, patterns, etc. 7.2 Packaging
The accelerated curing box shall be packed in a firm packaging box. After the transportation test according to Article 5.12, the packaging box shall not be obviously damaged or deformed. Each accelerated curing box shall be accompanied by an instruction manual, a certificate of inspection, a product warranty sheet and a packing list when it leaves the factory. 7.3 Transportation and Storage
During transportation and storage, the product should not be dropped, bumped, or wetted by rain or snow. The product should be stored in a well-ventilated warehouse with an ambient air temperature of -30℃~40℃ and a relative humidity of no more than 85%. There should be no corrosive gas around.
7.4 Warranty Period
If the user complies with the storage, installation and use regulations, the accelerated curing box will be repaired or replaced free of charge by the manufacturer within one year from the date of purchase if there is any failure.2 The water temperature in the accelerated curing box is heated to 55℃, and all the test pieces are discharged and immersed in water. After the water temperature in the box returns to 55℃±2℃, the temperature is kept constant for 24 hours. Within 24 hours, the water temperature uniformity and the accuracy of the time controller and the working state of the heat source of the accelerated curing box are measured every 8 hours.
5.6 Air tightness test of box cover
5.6.1 For the air tightness test of the gasket-type sealed box cover, the accelerated curing box is placed at room temperature before the test without power. Take a piece of paper with a thickness of 0.08mm, a width of 50mm, and a length of 200mm and place it at any point on the sealing strip. Close the box cover and press it vertically on the paper. Pull the paper, and the paper should not slide freely. 5.6.2 For the air tightness test of the water-sealed sealed box cover, the accelerated curing box is placed at room temperature, and the water temperature in the box is heated to 95℃. There should be no hot air escaping from the seal. 5.7 Test of thermal insulation performance of the box
The accelerated curing box is placed in an environment with a room temperature of 20℃±3℃, clean water is injected into the box to 30mm from the box opening, the box cover is closed, the power is turned on, and when the water temperature is heated to 80C, the power is turned off. Measure the temperature of the water in the box, and the results obtained should comply with the provisions of Table 1. Table 1
Standing time, h
Water humidity in the box, C
5.8 Insulation resistance measurement
Use a DC 500V megohmmeter in the hot state to measure between any pole of the power supply line and the machine body, and the results should comply with the provisions of Article 4.6 of this standard.
5.9 Durability test of the box cover hinge and handle The accelerated curing box is placed stably at room temperature without power. The opening angle of the box cover should be greater than 90°. One opening and one closing is one cycle. The normal number of cycles is 10 times per minute. After the test is completed according to the number of times specified in Article 4.5.5, an inspection is carried out, and the results should comply with the provisions of Articles 4.5.4 and 4.5.5.
5.10 Mechanical strength test of specimen rack and caster The accelerated curing box is placed at room temperature, with pads at the four corners and no power is applied. The prepared concrete cube specimens are placed on the sub-board in sequence according to the designed loading number, and the box cover is closed. After the test for 1 hour, the specimens are taken out, and the sub-bracket and pen sub-board are observed and inspected. No deformation is required. The four corner blocks are taken out, the curing box is moved, and the working state of the caster is checked to be normal. 5.11 Appearance inspection
Visually inspect the coating surface. There should be no obvious flow scars, scratches, wrinkles, bubbles, missing coatings, and aggregated sand particles. The coating, electroplating parts, and plastic parts of the box body should comply with the provisions of Article 4.5.8.
5.12 Transport test
Place the package on the car and secure it, and drive it for 50 km on a third-class highway. After the test, check whether the appearance of the accelerated curing box package is damaged. After removing the packaging box, conduct a complete machine installation firmness inspection, and the results should comply with the provisions of Articles 4.5.7 and 7.2. 6 Inspection rules
6.1 Inspection classification
The inspection of the accelerated curing box is divided into type inspection and factory inspection. 6.1.1 Type inspection Type inspection should be carried out in any of the following situations: a) Trial design and appraisal of new products or old products for transfer to factory production; b) After formal production, if there are major changes in structure, materials, and processes that may affect product performance; at least once a year during normal production; when production is resumed after a shutdown of more than half a year (including half a year); when the results of the outgoing inspection are significantly different from the last type inspection; when the national quality supervision agency proposes a requirement for type inspection. 6.1.2
Factory inspection. For products that have passed the type inspection and are officially put into production, the manufacturer's quality inspection department should inspect them according to the factory inspection items before they leave the factory, and only those that pass the inspection are allowed to leave the factory. 6.2
See Table 2 for various inspection items for accelerated curing boxes. Table 2 Inspection items
Appearance inspection
Inspection items
Work box size measurement
Water temperature and uniformity test inside the box
Heat source power series test
Constant temperature time accuracy test
Box cover air tightness test
Box insulation performance test
Electrical safety test
Test piece rack mechanical strength test
Castor working status inspection
Load test
Box cover Durability test for hinges and handles
Transportation test
6.3 Judgment rules
Type inspection
Judgment basis
(Subject to this standard)
4.5.7,4.5.8
Type inspection
Factory inspection
Two units of each model of product are randomly selected and inspected according to the type inspection items in Table 2, and the main items of each test must all meet the corresponding technical requirements of this standard. Among the general items inspected, if more than one item fails to meet the requirements, the type inspection will not be passed. If one of the general items inspected fails to meet the requirements, double sampling should be done from the batch of products to repeat the inspection of the unqualified item. If all the re-inspected items meet the requirements of this standard, the item can be judged as qualified. If there is still one item that fails to meet the requirements of this standard, the type inspection will not be passed.
6.3.2 Factory inspection
Each accelerated curing box leaving the factory shall be inspected according to the inspection items specified in Table 2. Only those that pass all the inspections can leave the factory. 7 Marking, packaging, transportation, storage
7.1 Marking
7.1.1Each accelerated curing box shall have a durable nameplate in an appropriate and obvious position. The following contents shall be clearly marked on the nameplate: a)
Product name and model;
Curating temperature range;
Control time range;
Rated voltage, V;
Rated frequency, Hz;
Total input power, W;
Net weight, kg;
Manufacturer name;
Manufacture date and number.
Registered Trademark
Packaging Mark
JG/T3027-1995
The outer surface of the packaging box shall be painted with non-fading paint, and the following marks shall be clearly marked: a)
Full name of the manufacturer;
Product name and model;
Trademark;
Net weight, kg; Gross weight, kg;
Outer dimensions of the packaging box: length × width × height, mm; Transportation precautions: Handle with care, moisture-proof, upward, number of layers that can be delivered, etc., or symbols, patterns, etc. 7.2 Packaging
The accelerated curing box shall be packed in a firm packaging box. After the transportation test according to Article 5.12, the packaging box shall not be obviously damaged or deformed. Each accelerated curing box shall be accompanied by an instruction manual, a certificate of inspection, a product warranty sheet and a packing list when it leaves the factory. 7.3 Transportation and Storage
During transportation and storage, the product should not be dropped, bumped, or wetted by rain or snow. The product should be stored in a well-ventilated warehouse with an ambient air temperature of -30℃~40℃ and a relative humidity of no more than 85%. There should be no corrosive gas around.
7.4 Warranty Period
If the user complies with the storage, installation and use regulations, the accelerated curing box will be repaired or replaced free of charge by the manufacturer within one year from the date of purchase if there is any failure.10 Mechanical strength test of specimen rack and caster The accelerated curing box is placed at room temperature, with pads at the four corners and no power. The prepared concrete cube specimens are placed on the sub-board in sequence according to the designed loading number, and the box cover is closed. After the test for 1 hour, the specimens are taken out, and the sub-bracket and pen sub-board are observed and inspected. It is required that no deformation occurs. The four corner blocks are taken out, and the curing box is moved to check whether the working state of the caster is normal. 5.11 Appearance inspection
Visually inspect the coating surface. There should be no obvious flow scars, scratches, wrinkles, bubbles, missing coating and aggregated sand particles. The coating, electroplating parts and plastic parts of the box body shall comply with the provisions of Article 4.5.8.
5.12 Transportation test
Put the package on the car and fix it, and drive 50km on the third-level highway. After the test, check whether the appearance of the accelerated curing box package is damaged. After removing the packaging box, the installation firmness of the whole machine is checked, and the results shall comply with the provisions of Articles 4.5.7 and 7.2. 6 Inspection rules
6.1 Inspection classification
The inspection of accelerated curing box is divided into type inspection and factory inspection. 6.1.1 Type inspection. Type inspection should be carried out in any of the following situations: a) Trial design and identification of new products or old products for transfer to factory production; b)
JG/T3027--1995
After formal production, if there are major changes in structure, materials, and processes that may affect product performance; at least once a year during normal production; when production is resumed after a suspension of more than half a year (including half a year); when the results of the outgoing inspection are significantly different from the last type inspection; when the national quality supervision agency proposes a requirement for type inspection. 6.1.2
Factory inspection. For products that have passed the type inspection and are officially put into production, the quality inspection department of the manufacturer shall conduct inspections according to the factory inspection items before leaving the factory, and only those that pass the inspection shall be allowed to leave the factory. 6.2
The various inspection items of accelerated curing box are shown in Table 2. Table 2 Inspection items
Appearance inspection
Inspection items
Work box size measurement
Water temperature and uniformity test inside the box
Heat source power series test
Constant temperature time accuracy test
Box cover air tightness test
Box insulation performance test
Electrical safety test
Test piece rack mechanical strength test
Castor working status inspection
Load test
Box cover Durability test for hinges and handles
Transportation test
6.3 Judgment rules
Type inspection
Judgment basis
(Subject to this standard)
4.5.7,4.5.8
Type inspection
Factory inspection
Two units of each model of product are randomly selected and inspected according to the type inspection items in Table 2, and the main items of each test must all meet the corresponding technical requirements of this standard. Among the general items inspected, if more than one item fails to meet the requirements, the type inspection will not be passed. If one of the general items inspected fails to meet the requirements, double sampling should be done from the batch of products to repeat the inspection of the unqualified item. If all the re-inspected items meet the requirements of this standard, the item can be judged as qualified. If there is still one item that fails to meet the requirements of this standard, the type inspection will not be passed.
6.3.2 Factory inspection
Each accelerated curing box leaving the factory shall be inspected according to the inspection items specified in Table 2. Only those that pass all the inspections can leave the factory. 7 Marking, packaging, transportation, storage
7.1 Marking
7.1.1Each accelerated curing box shall have a durable nameplate in an appropriate and obvious position. The following contents shall be clearly marked on the nameplate: a)
Product name and model;
Curating temperature range;
Control time range;
Rated voltage, V;
Rated frequency, Hz;
Total input power, W;
Net weight, kg;
Manufacturer name;
Manufacture date and number.
Registered Trademark
Packaging Mark
JG/T3027-1995
The outer surface of the packaging box shall be painted with non-fading paint, and the following marks shall be clearly marked: a)
Full name of the manufacturer;
Product name and model;
Trademark;
Net weight, kg; Gross weight, kg;
Outer dimensions of the packaging box: length × width × height, mm; Transportation precautions: Handle with care, moisture-proof, upward, number of layers that can be delivered, etc., or symbols, patterns, etc. 7.2 Packaging
The accelerated curing box shall be packed in a firm packaging box. After the transportation test according to Article 5.12, the packaging box shall not be obviously damaged or deformed. Each accelerated curing box shall be accompanied by an instruction manual, a certificate of inspection, a product warranty sheet and a packing list when it leaves the factory. 7.3 Transportation and Storage
During transportation and storage, the product should not be dropped, bumped, or wetted by rain or snow. The product should be stored in a well-ventilated warehouse with an ambient air temperature of -30℃~40℃ and a relative humidity of no more than 85%. There should be no corrosive gas around.
7.4 Warranty Period
If the user complies with the storage, installation and use regulations, the accelerated curing box will be repaired or replaced free of charge by the manufacturer within one year from the date of purchase if there is any failure.10 Mechanical strength test of specimen rack and caster The accelerated curing box is placed at room temperature, with pads at the four corners and no power. The prepared concrete cube specimens are placed on the sub-board in sequence according to the designed loading number, and the box cover is closed. After the test for 1 hour, the specimens are taken out, and the sub-bracket and pen sub-board are observed and inspected. It is required that no deformation occurs. The four corner blocks are taken out, and the curing box is moved to check whether the working state of the caster is normal. 5.11 Appearance inspection
Visually inspect the coating surface. There should be no obvious flow scars, scratches, wrinkles, bubbles, missing coating and aggregated sand particles. The coating, electroplating parts and plastic parts of the box body shall comply with the provisions of Article 4.5.8.
5.12 Transportation test
Put the package on the car and fix it, and drive 50km on the third-level highway. After the test, check whether the appearance of the accelerated curing box package is damaged. After removing the packaging box, the installation firmness of the whole machine is checked, and the results shall comply with the provisions of Articles 4.5.7 and 7.2. 6 Inspection rules
6.1 Inspection classification
The inspection of accelerated curing box is divided into type inspection and factory inspection. 6.1.1 Type inspection. Type inspection should be carried out in any of the following situations: a) Trial design and identification of new products or old products for transfer to factory production; b)
JG/T3027--1995
After formal production, if there are major changes in structure, materials, and processes that may affect product performance; at least once a year during normal production; when production is resumed after a suspension of more than half a year (including half a year); when the results of the outgoing inspection are significantly different from the last type inspection; when the national quality supervision agency proposes a requirement for type inspection. 6.1.2
Factory inspection. For products that have passed the type inspection and are officially put into production, the quality inspection department of the manufacturer shall conduct inspections according to the factory inspection items before leaving the factory, and only those that pass the inspection shall be allowed to leave the factory. 6.2
The various inspection items of accelerated curing box are shown in Table 2. Table 2 Inspection items
Appearance inspection
Inspection items
Work box size measurement
Water temperature and uniformity test inside the box
Heat source power series test
Constant temperature time accuracy test
Box cover air tightness test
Box insulation performance test
Electrical safety test
Test piece rack mechanical strength test
Castor working status inspection
Load test
Box cover Durability test for hinges and handles
Transportation test
6.3 Judgment rules
Type inspection
Judgment basis
(Subject to this standard)
4.5.7,4.5.8
Type inspection
Factory inspection
Two units of each model of product are randomly selected and inspected according to the type inspection items in Table 2, and the main items of each test must all meet the corresponding technical requirements of this standard. Among the general items inspected, if more than one item fails to meet the requirements, the type inspection will not be passed. If one of the general items inspected fails to meet the requirements, double sampling should be done from the batch of products to repeat the inspection of the unqualified item. If all the re-inspected items meet the requirements of this standard, the item can be judged as qualified. If there is still one item that fails to meet the requirements of this standard, the type inspection will not be passed.
6.3.2 Factory inspection
Each accelerated curing box leaving the factory shall be inspected according to the inspection items specified in Table 2. Only those that pass all the inspections can leave the factory. 7 Marking, packaging, transportation, storage
7.1 Marking
7.1.1Each accelerated curing box shall have a durable nameplate in an appropriate and obvious position. The following contents shall be clearly marked on the nameplate: a)
Product name and model;
Curating temperature range;
Control time range;
Rated voltage, V;
Rated frequency, Hz;
Total input power, W;
Net weight, kg;
Manufacturer name;
Manufacture date and number.
Registered Trademark
Packaging Mark
JG/T3027-1995
The outer surface of the packaging box shall be painted with non-fading paint, and the following marks shall be clearly marked: a)
Full name of the manufacturer;
Product name and model;
Trademark;
Net weight, kg; Gross weight, kg;
Outer dimensions of the packaging box: length × width × height, mm; Transportation precautions: Handle with care, moisture-proof, upward, number of layers that can be delivered, etc., or symbols, patterns, etc. 7.2 Packaging
The accelerated curing box shall be packed in a firm packaging box. After the transportation test according to Article 5.12, the packaging box shall not be obviously damaged or deformed. Each accelerated curing box shall be accompanied by an instruction manual, a certificate of inspection, a product warranty sheet and a packing list when it leaves the factory. 7.3 Transportation and Storage
During transportation and storage, the product should not be dropped, bumped, or wetted by rain or snow. The product should be stored in a well-ventilated warehouse with an ambient air temperature of -30℃~40℃ and a relative humidity of no more than 85%. There should be no corrosive gas around.
7.4 Warranty Period
If the user complies with the storage, installation and use regulations, the accelerated curing box will be repaired or replaced free of charge by the manufacturer within one year from the date of purchase if there is any failure.1 Each accelerated curing box shall have a durable nameplate in an appropriate and obvious position. The nameplate shall clearly indicate the following: a)
Product name and model;
Curating temperature range;
Control time range;
Rated voltage, V;
Rated frequency, Hz;
Total input power, W;
Net weight, kg;
Manufacturer name;
Manufacture date and number.
Registered Trademark
Packaging Mark
JG/T3027-1995
The outer surface of the packaging box shall be painted with non-fading paint, and the following marks shall be clearly marked: a)
Full name of the manufacturer;
Product name and model;
Trademark;
Net weight, kg; Gross weight, kg;
Outer dimensions of the packaging box: length × width × height, mm; Transportation precautions: Handle with care, moisture-proof, upward, number of layers that can be delivered, etc., or symbols, patterns, etc. 7.2 Packaging
The accelerated curing box shall be packed in a firm packaging box. After the transportation test according to Article 5.12, the packaging box shall not be obviously damaged or deformed. Each accelerated curing box shall be accompanied by an instruction manual, a certificate of inspection, a product warranty sheet and a packing list when it leaves the factory. 7.3 Transportation and Storage
During transportation and storage, the product should not be dropped, bumped, or wetted by rain or snow. The product should be stored in a well-ventilated warehouse with an ambient air temperature of -30℃~40℃ and a relative humidity of no more than 85%. There should be no corrosive gas around.
7.4 Warranty Period
If the user complies with the storage, installation and use regulations, the accelerated curing box will be repaired or replaced free of charge by the manufacturer within one year from the date of purchase if there is any failure.1 Each accelerated curing box shall have a durable nameplate in an appropriate and obvious position. The nameplate shall clearly indicate the following: a)
Product name and model;
Curating temperature range;
Control time range;
Rated voltage, V;
Rated frequency, Hz;
Total input power, W;
Net weight, kg;
Manufacturer name;
Manufacture date and number.
Registered Trademark
Packaging Mark
JG/T3027-1995
The outer surface of the packaging box shall be painted with non-fading paint, and the following marks shall be clearly marked: a)
Full name of the manufacturer;
Product name and model;
Trademark;
Net weight, kg; Gross weight, kg;
Outer dimensions of the packaging box: length × width × height, mm; Transportation precautions: Handle with care, moisture-proof, upward, number of layers that can be delivered, etc., or symbols, patterns, etc. 7.2 Packaging
The accelerated curing box shall be packed in a firm packaging box. After the transportation test according to Article 5.12, the packaging box shall not be obviously damaged or deformed. Each accelerated curing box shall be accompanied by an instruction manual, a certificate of inspection, a product warranty sheet and a packing list when it leaves the factory. 7.3 Transportation and Storage
During transportation and storage, the product should not be dropped, bumped, or wetted by rain or snow. The product should be stored in a well-ventilated warehouse with an ambient air temperature of -30℃~40℃ and a relative humidity of no more than 85%. There should be no corrosive gas around.
7.4 Warranty Period
If the user complies with the storage, installation and use regulations, the accelerated curing box will be repaired or replaced free of charge by the manufacturer within one year from the date of purchase if there is any failure.
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