Some standard content:
Chemical Industry Standard of the People's Republic of China
HG 2485 - 93
Aircraft Tire Valve Core
Published on July 5, 1993
Ministry of Chemical Industry of the People's Republic of China
Implemented on December 1, 1994
Chemical Industry Standard of the People's Republic of China
Aircraft Tire Valve Core
This standard adopts ISO7295-1988 "Aircraft Tire Valves - Interchangeable Dimensions"
Subject Content and Scope of Application
HG 2485—93
This standard specifies the type, structural dimensions, technical requirements, test methods, inspection rules and product marking, packaging and storage general requirements of aircraft tire valve cores (hereinafter referred to as valve cores). This standard is applicable to valve cores used for valves of various types of aircraft tires. Reference Standards
G2828 Batch inspection counting sampling procedures and sampling tables (applicable to inspection of continuous batches) GB2829 Periodic inspection counting sampling procedures and sampling tables (applicable to inspection of continuous batches) (For inspection of stability during production) GB9765 Tire valve pattern
GB/T9767 Tire valve core test method
HG2484 Aviation inner tube valve
3 Product type, structural form Main dimensions
Model indication method
Letters indicate sealing form
Numbers indicate structural form
Aircraft tire valve core code
The valve core models and names are shown in Table 1.
HC--2 E
HC-2 C
3.3 Structural form and main dimensions
3. 3, HC-13 valve core as shown in Figure 1
1993-07-0S Approval name of the Ministry of Chemical Industry of the People's Republic of China
Non-metallic sealed short valve core
Non-metallic sealed long valve core
Metallic sealed short valve core
Metallic sealed long valve core
1994-12-01 Implementation
S
HG2485-93
Figure 1 HC-1B valve core
1—Core cap: 2—Core body; 3-core rod: 4-core seat; 5-core seat gasket; 6-core seal; 7-core spring 3.3.2HC-2B valve core is shown in Figure 2,
Figure 2HC-2B valve core
1--core width: 2-core body; 3-core rod; 4-core seat: 5-core spring; 6-core spring support: 7-core seat gasket; 8-core body seal 3.3.3HC-1C valve core is shown in Figure 3,
HG 2485 —- 93
Figure 3 HC-1C valve core
[1-core width; 2-core body; 3-core rod; 4-core seat; 5-core seat sealing gasket, 6-core spring 3.3.4HC-2C valve core is shown in Figure 4.
Figure 4HC-2C valve core
1-core cap; 2-core body; 3-core rod: 4-core seat; 5-core spring; 6-core spring support; 7-core seat sealing pad 3.4 Thread size and tolerance
The size and tolerance of the thread 5V1 of the valve core cap shall comply with GB9765 4.1 Basic requirements
Products shall comply with the requirements of this standard and be manufactured in accordance with the drawings and documents approved by the prescribed procedures. Products that meet the requirements of this standard are first-class products. 4.2 Materials
The materials used for the valve core shall comply with the provisions of Table 2. Name of valve core parts
Core stop seal drawing
Core seat gasket
Core yellow support seat
4.3 Design
HG 2485 +- 93
HPb 59-1 Brass wire
Polytetrachloroethylene
Silicone rubber
QSz 6. 5-0. 10 or elastic steel wire
The designed valve core should be compatible with the aircraft inner tube valve that complies with HG2484. 4.3.1 Installation torque
The installation torque of non-metallic sealing valve core and metal sealing valve core is 0.17～0.34N·m and 0.34～0.54N·m respectively. 4.3.2 Convexity and concaveness
After the valve core is screwed into the qualified aircraft tire valve, with the end face of the valve mouth as the reference, the exposed core rod head shall not exceed 0.25mm, and the recessed shall not exceed 0.90mm. (As shown in Figure 5) 06 *0
4.4 Performance
4. 4. 1 Air tightness
Valve body
The valve core shall be screwed into the aviation inner tube valve that complies with HG2484 according to the specified torque. It shall be able to withstand a pressure of 0.0340~3.80MPa without leakage.
4. 4. 2 Deflation
HG 2485-93
Simulate the deflation process under high pressure. After ten deflations are carried out according to the test specified in Article 5.4 of this standard, the valve core shall not leak. 4.4.3 Inflation
Simulate the inflation process under high pressure. After ten inflations are carried out according to the test specified in Article 5.3 of this standard, the valve core shall not leak. 4.4:4 Pulse
The valve core shall not leak after the pulse test according to the provisions of Table 3. Table 3
Working conditions
High pressure pulse
Medium pressure pulse
High pressure pulse
4. 4. 5High temperature
Force, MP
After the valve core is tested according to the test method specified in 5.7 of this standard, there shall be no leakage. 4.4.6Low temperature
After the valve core is tested according to the test method specified in 5.8 of this standard, there shall be no leakage. 4.4.7Tension
Each part of the valve core shall be connected reliably and be able to withstand a certain tension, as shown in Table 4. Table 4
Valve core type
Short valve core
Long valve core
The connection of the valve core is in the position
Core cap and core body
Core seat and core rodbzxZ.net
Core yoke and core body
Core seat and core rod
Core spring support and core rod
Pulse number
Tensile force that can be withstood
4.4.8 Opening pressure
When the valve core is installed in a qualified aircraft tire valve, its opening pressure shall not be less than 0.250MPs under the condition of no reverse pressure. 4.5 Surface
The product surface shall be smooth, free of cracks and burrs, and shall have an anti-corrosion coating, and the coating shall not be allowed to fall off. 4.6 Core sealing diagram
The surface of the non-metallic core sealing ring shall be smooth and flat, and shall not fall off during use. The roundness tolerance of the male surface of the metal core seal shall not exceed 0.02 mm.
4.7 Core seat gasket
The core seat gasket should be flat, without any scratches, crushing or impurities, and shall not fall off during use. 4.8 Core rod stroke
HG 2485 -
After the valve core assembly, "there shall be no jamming when pressing the core rod. When the core rod is pressed to the lowest position, its stroke is 1.5-2.5mm. 3 Test method
Test equipment and instruments
The high temperature test chamber controls the temperature above 250°C, and the temperature fluctuation is ±2°C: The low temperature test chamber controls the temperature below -55°C, and the temperature fluctuation is ±2°C; b.
The maximum load of the tensile testing machine is 500 N, and the relative error of the indication is ± 1%, the relative change value is 1%; the inflation pressure of the impulse test machine is higher than 3.80MP; d.
e.: The pressure indication values are 0~6.00MPa and 0~0.60MPa respectively, and the accuracy level is 1.5 level f. Stopwatch:
g: "Xie Yu valve specification is 0~6.00MPa.
5.2. Routine inspection
5.2.1 Check the valve core by visual and conventional inspection methods, which should meet the requirements of 4.3 and 4.54.8. 3.2.2. After screwing into the qualified valve mouth with the minimum value of the specified torque, check the exposed amount of the core rod head: After screwing into the qualified valve mouth with the maximum value of the specified torque, check the recessed amount of the core rod head. 5.3 Sealing test
According to the specified torque, the valve core is inserted into the qualified aircraft tire valve mouth or special test device. Then put it into water, make the mouth of the valve upward, 2 cm from the water surface, and let in air pressure of 0.034 MPa and 3.80 MPa respectively, keep each for 3 minutes, and observe whether it is inflated.
5.4 Deflation test
Under the air pressure of 3.80 MPa, press the valve core rod to the bottom 10 times, keep deflation for 3 s each time, and then put it into water to observe whether it leaks air.
5.5 Inflation test
Simulate the inflation process, the inflation pressure is 3.80 MPa, press the valve core rod to the bottom 10 times, keep deflation for 3 s each time, and then connect 3.5.6 Pulse Test
Test at room temperature according to the requirements of Table 3, and connect to 3.80 MPa air pressure system after high, medium and low pressure pulses, and then put it into water to observe whether it leaks.
5.7 High Temperature Test
After the valve core is driven into the qualified valve mouth according to the specified torque: put it in a high temperature box, keep it at 180±2℃ for 24 hours, and then keep it at 200±2℃ for 20 minutes, and then cool it to 50℃ or room temperature, and connect it to 3.80 MPa air pressure system to observe whether it leaks. If there is leakage, it can be tightened again according to the specified torque. After there is no leakage, check for leakage according to the requirements of 5.4 and 5.5. 5. 8 Low temperature test
After the valve core is inserted into the qualified valve mouth according to the specified torque, put it in a low temperature box, keep it at -552℃ and 3.80MPa for 24 hours, and observe whether there is leakage. If there is leakage, tighten it again according to the specified torque. After there is no leakage, restore it to room temperature for inflation and deflation test. 5. 9 Tension test
Install the valve core on the special fixture of the tensile machine, and test the core cap and core body, core seat and core rod respectively. The maximum tensile force that each joint between the core spring support and the core rod can withstand,
5.10 Opening pressure test
The valve core that has passed the sealing test is screwed into the qualified aircraft tire valve mouth according to the torque specified in this standard, and then tested according to the opening pressure test method specified in GB/T 9767,6
Inspection rules
HG 2485 -
The product should be inspected by the technical inspection department of the manufacturer. Each batch of products leaving the factory must meet the requirements of this standard and be accompanied by a product quality certificate.
6.1 Factory inspection
6.1.1 Full inspection
Each valve core should be inspected to see whether its surface, core seal ring (or metal core seal cone surface), and core seat seal meet the requirements of 4.5, 4.6 and 4.7 respectively. If any one of the inspection results is unqualified, the valve core is unqualified and should be removed. 6.1.2 Sampling inspection
The inspection procedure and implementation shall comply with the provisions of GB2828. 6.1.2.1 Inspection batch
A warehouse batch or delivery batch of the same model and specification is an inspection batch. 6.1.2.2 Classification of non-conformities
This standard classifies non-conformities into Class A non-conformities, Class B non-conformities, and Class C non-conformities according to the importance of quality characteristics. Each type of project is further divided into several inspection groups: see Table 5.6 for details 1.2. 3 Acceptable quality level (AQL) and inspection level (IL) The acceptable quality level list (expressed as the number of unqualified products per 100 units of product) and inspection level of each inspection group shall comply with the provisions of Table 5. Table 5
Unqualified classification
Inspection group
51.2.4 Inspection strictness
Opening pressure
SVI thread
Core evaluation stroke
Shall comply with the chapter number of this standard
Unless otherwise specified, normal inspection shall be used at the beginning of the inspection. If it is necessary to change the strictness of the inspection, it shall comply with the transfer rules specified in GB2828; otherwise, the strictness of the next batch of inspections shall remain unchanged 61.2.5 Judgment of qualified or unqualified batch by batch inspection Judgment of qualified or unqualified batch by batch inspection shall comply with the provisions in GB2828. 6 1. 2. 6 Disposal after batch inspection
HG.2485-93
The disposal method after batch inspection shall comply with the provisions of GB2828. 6.2 Type inspection
The inspection procedure and implementation shall comply with the provisions of GB2829. All items specified in this standard shall be inspected. Type inspection must be carried out in any of the following cases: 6. 2. 1
Trial production and assembly of new products or old products transferred to the factory for production; After formal production, if there are major changes in structure, materials, and processes that may affect product performance: In normal production, a periodic inspection shall be carried out for every 100,000 valve cores produced; When production is stopped for more than one year and resumed:
When there is a major difference between the factory inspection results and the last type inspection; When the national quality supervision agency proposes a type inspection requirement. Inspection batch
is a batch of products manufactured for production finalization inspection, or a batch of products manufactured within a specified period in the mass production process after passing the production finalization inspection.
6.2.3 Classification of nonconformities
This standard classifies nonconformities into Class A nonconformities, Class H nonconformities, and Class C nonconformities according to the importance of quality characteristics. Each type of project is further divided into several inspection groups, see Table 6.6.2.4 Rejection quality level (RQL) and discrimination level (DL) The rejection quality level (expressed as the number of rejected products per 100 units of product) and discrimination level of each inspection group shall comply with the provisions of Table 6. Table 6
Rejection classification
Inspection group
Air tightness
Core body sealing ring
Core seat sealing gasket
Opening force
5 V1 Thread
Core rod stroke
Should comply with the chapter number of this standard
6.2.5 Type According to the judgment of acceptance or rejection HG 248S — 93
The judgment of whether the type inspection is qualified or unqualified shall comply with the provisions of GB2829. 6.2.6 Disposal after type inspection
The disposal of type inspection shall comply with the provisions of GB2829. 7 Marking, packaging and storage
7.1 Marking
7.1. The manufacturer's mark shall be printed on the top of the valve core stem. 7.1. The following contents shall be printed on the valve core packaging box (box): manufacturer name and address, trademark;
b. Product name, model and manufacturing date, product quality grade, number of products in the box, number of this standard, 7.* Packaging
When the valve core is packaged, moisture-proof measures shall be taken, and the product quality certificate shall be included in the packaging box. 7.3 Storage
1.3.1 The valve core should be stored in a warehouse with a temperature of 0-28℃ and a relative humidity of no more than 80%, and should be kept away from light, heat, oxygen, acids, alkalis and other harmful substances. 7.32 The warranty period of the valve core is 5 years from the date of manufacture. Additional Notes: This standard was proposed by the Science and Technology Department of the Ministry of Chemical Industry of the People's Republic of China. This standard originated from the Baoguang Rubber Industry Research Institute of the Ministry of Chemical Industry. This standard was drafted by the Shuguang Rubber Industry Research Institute of the Ministry of Chemical Industry. The relevant persons in charge of this standard are Ke Chaotan, Gan Baoxin, Liu Qihui, Zhong Zhaoxiang, Li Feng, the People's Republic of China. Chemical Industry Standards. Aviation Tire Valve Core. HG 2485 -- 93. Edited by Chemical Industry Standards Editorial Department. (Standardization Research Institute of the Ministry of Chemical Industry) Postal Code: 100013. Printing. Standardization Research Institute of the Ministry of Chemical Industry. Copyright reserved. No reproduction allowed. Format 880× 1330 1 / 16 Printing Sheet 4 Words 18 0001993 October 1st edition
1993 October 1st printing
Print run 1 — 500
1. Book cost 2. 60 yuan
2485-910 Opening pressure test
The valve core that has passed the sealing test shall be screwed into the qualified aircraft tire valve mouth according to the torque specified in this standard, and then tested according to the opening pressure test method specified in GB/T 9767. 6
Inspection rules
HG 2485 -
Products shall be inspected by the technical inspection department of the manufacturer. Each batch of products leaving the factory shall comply with the requirements of this standard and be accompanied by a product quality certificate.
6.1 Factory inspection
6.1.1 Full inspection
Each valve core shall be inspected to see whether its surface, core seal ring (or metal core seal cone surface), and core seat seal meet the requirements of 4.5, 4.6 and 4.7 respectively. If any one of the inspection results is unqualified, the valve core is unqualified and shall be removed. 6.1.2 Sampling inspection
The inspection procedure and implementation shall comply with the provisions of GB2828. 6.1.2.1 Inspection batch
A warehouse batch or delivery batch of the same model and specification is an inspection batch. 6.1.2.2 Classification of non-conformities
This standard classifies non-conformities into Class A non-conformities, Class B non-conformities, and Class C non-conformities according to the importance of quality characteristics. Each type of project is further divided into several inspection groups: see Table 5.6 for details 1.2. 3 Acceptable quality level (AQL) and inspection level (IL) The acceptable quality level list (expressed as the number of unqualified products per 100 units of product) and inspection level of each inspection group shall comply with the provisions of Table 5. Table 5
Unqualified classification
Inspection group
51.2.4 Inspection strictness
Opening pressure
SVI thread
Core evaluation stroke
Shall comply with the chapter number of this standard
Unless otherwise specified, normal inspection shall be used at the beginning of the inspection. If it is necessary to change the strictness of the inspection, it shall comply with the transfer rules specified in GB2828; otherwise, the strictness of the next batch of inspections shall remain unchanged 61.2.5 Judgment of qualified or unqualified batch by batch inspection Judgment of qualified or unqualified batch by batch inspection shall comply with the provisions in GB2828. 6 1. 2. 6 Disposal after batch inspection
HG.2485-93
The disposal method after batch inspection shall comply with the provisions of GB2828. 6.2 Type inspection
The inspection procedure and implementation shall comply with the provisions of GB2829. All items specified in this standard shall be inspected. Type inspection must be carried out in any of the following cases: 6. 2. 1
Trial production and assembly of new products or old products transferred to the factory for production; After formal production, if there are major changes in structure, materials, and processes that may affect product performance: In normal production, a periodic inspection shall be carried out for every 100,000 valve cores produced; When production is stopped for more than one year and then resumed:
When there is a major difference between the factory inspection result and the last type inspection; When the national quality supervision agency proposes a type inspection requirement. Inspection batch
is a batch of products manufactured for production finalization inspection, or a batch of products manufactured within a specified period in the mass production process after passing the production finalization inspection.
6.2.3 Classification of nonconformities
This standard classifies nonconformities into Class A nonconformities, Class H nonconformities, and Class C nonconformities according to the importance of quality characteristics. Each type of project is further divided into several inspection groups, see Table 6.6.2.4 Rejection quality level (RQL) and discrimination level (DL) The rejection quality level (expressed as the number of rejected products per 100 units of product) and discrimination level of each inspection group shall comply with the provisions of Table 6. Table 6
Rejection classification
Inspection group
Air tightness
Core body sealing ring
Core seat sealing gasket
Opening force
5 V1 Thread
Core rod stroke
Should comply with the chapter number of this standard
6.2.5 Type According to the judgment of acceptance or rejection HG 248S — 93
The judgment of whether the type inspection is qualified or unqualified shall comply with the provisions of GB2829. 6.2.6 Disposal after type inspection
The disposal of type inspection shall comply with the provisions of GB2829. 7 Marking, packaging and storage
7.1 Marking
7.1. The manufacturer's mark shall be printed on the top of the valve core stem. 7.1. The following contents shall be printed on the valve core packaging box (box): manufacturer name and address, trademark;
b. Product name, model and manufacturing date, product quality grade, number of products in the box, this standard number, 7.* Packaging
When the valve core is packaged, moisture-proof measures shall be taken, and the product quality certificate shall be included in the packaging box. 7.3 Storage
1.3.1 The valve core should be stored in a warehouse with a temperature of 0-28℃ and a relative humidity of no more than 80%, and should be kept away from light, heat, oxygen, acids, alkalis and other harmful substances. 7.32 The warranty period of the valve core is 5 years from the date of manufacture. Additional Notes: This standard was proposed by the Science and Technology Department of the Ministry of Chemical Industry of the People's Republic of China. This standard originated from the Ministry of Chemical Industry's Shuguang Rubber Industry Research Institute. This standard was drafted by the Ministry of Chemical Industry's Shuguang Rubber Industry Research Institute. The relevant persons in charge of this standard are Ke Chaotan, Gan Baoxin, Liu Qihui, Zhong Zhaoxiang, Li Feng, the People's Republic of China. Chemical Industry Standards. Aviation Tire Valve Core. HG 2485 -- 93. Edited by Chemical Industry Standards Editorial Department. (Standardization Research Institute of the Ministry of Chemical Industry) Postal Code: 100013. Printing. Ministry of Chemical Industry Standardization Research Institute. Copyright reserved. No reproduction allowed. Format 880× 1330 1 / 16 Printing Sheet 4 Words 18 0001993 October 1st edition
1993 October 1st printing
Print run 1 — 500
1. Book cost 2. 60 yuan
2485-910 Opening pressure test
The valve core that has passed the sealing test shall be screwed into the qualified aircraft tire valve mouth according to the torque specified in this standard, and then tested according to the opening pressure test method specified in GB/T 9767. 6
Inspection rules
HG 2485 -
Products shall be inspected by the technical inspection department of the manufacturer. Each batch of products leaving the factory shall comply with the requirements of this standard and be accompanied by a product quality certificate.
6.1 Factory inspection
6.1.1 Full inspection
Each valve core shall be inspected to see whether its surface, core seal ring (or metal core seal cone surface), and core seat seal meet the requirements of 4.5, 4.6 and 4.7 respectively. If any one of the inspection results is unqualified, the valve core is unqualified and shall be removed. 6.1.2 Sampling inspection
The inspection procedure and implementation shall comply with the provisions of GB2828. 6.1.2.1 Inspection batch
A warehouse batch or delivery batch of the same model and specification is an inspection batch. 6.1.2.2 Classification of non-conformities
This standard classifies non-conformities into Class A non-conformities, Class B non-conformities, and Class C non-conformities according to the importance of quality characteristics. Each type of project is further divided into several inspection groups: see Table 5.6 for details 1.2. 3 Acceptable quality level (AQL) and inspection level (IL) The acceptable quality level list (expressed as the number of unqualified products per 100 units of product) and inspection level of each inspection group shall comply with the provisions of Table 5. Table 5
Unqualified classification
Inspection group
51.2.4 Inspection strictness
Opening pressure
SVI thread
Core evaluation stroke
Should comply with the chapter number of this standard
Unless otherwise specified, normal inspection should be used during inspection. If it is necessary to change the strictness of the inspection, it shall comply with the transfer rules specified in GB2828; otherwise, the strictness of the next batch of inspections shall remain unchanged 61.2.5 Judgment of qualified or unqualified batch by batch inspection Judgment of qualified or unqualified batch by batch inspection shall comply with the provisions in GB2828. 6 1. 2. 6 Disposal after batch inspection
HG.2485-93
The disposal method after batch inspection shall comply with the provisions of GB2828. 6.2 Type inspection
The inspection procedure and implementation shall comply with the provisions of GB2829. All items specified in this standard shall be inspected. Type inspection must be carried out in any of the following cases: 6. 2. 1
Trial production and assembly of new products or old products transferred to the factory for production; After formal production, if there are major changes in structure, materials, and processes that may affect product performance: In normal production, a periodic inspection shall be carried out for every 100,000 valve cores produced; When production is stopped for more than one year and resumed:
When there is a major difference between the factory inspection results and the last type inspection; When the national quality supervision agency proposes a type inspection requirement. Inspection batch
is a batch of products manufactured for production finalization inspection, or a batch of products manufactured within a specified period in the mass production process after passing the production finalization inspection.
6.2.3 Classification of nonconformities
This standard classifies nonconformities into Class A nonconformities, Class H nonconformities, and Class C nonconformities according to the importance of quality characteristics. Each type of project is further divided into several inspection groups, see Table 6.6.2.4 Rejection quality level (RQL) and discrimination level (DL) The rejection quality level (expressed as the number of rejected products per 100 units of product) and discrimination level of each inspection group shall comply with the provisions of Table 6. Table 6
Rejection classification
Inspection group
Air tightness
Core body sealing ring
Core seat sealing gasket
Opening force
5 V1 Thread
Core rod stroke
Should comply with the chapter number of this standard
6.2.5 Type According to the judgment of acceptance or rejection HG 248S — 93
The judgment of whether the type inspection is qualified or unqualified shall comply with the provisions of GB2829. 6.2.6 Disposal after type inspection
The disposal of type inspection shall comply with the provisions of GB2829. 7 Marking, packaging and storage
7.1 Marking
7.1. The manufacturer's mark shall be printed on the top of the valve core stem. 7.1. The following contents shall be printed on the valve core packaging box (box): manufacturer name and address, trademark;
b. Product name, model and manufacturing date, product quality grade, number of products in the box, number of this standard, 7.* Packaging
When the valve core is packaged, moisture-proof measures shall be taken, and the product quality certificate shall be included in the packaging box. 7.3 Storage
1.3.1 The valve core should be stored in a warehouse with a temperature of 0-28℃ and a relative humidity of no more than 80%, and should be kept away from light, heat, oxygen, acids, alkalis and other harmful substances. 7.32 The warranty period of the valve core is 5 years from the date of manufacture. Additional Notes: This standard was proposed by the Science and Technology Department of the Ministry of Chemical Industry of the People's Republic of China. This standard originated from the Ministry of Chemical Industry's Shuguang Rubber Industry Research Institute. This standard was drafted by the Ministry of Chemical Industry's Shuguang Rubber Industry Research Institute. The relevant persons in charge of this standard are Ke Chaotan, Gan Baoxin, Liu Qihui, Zhong Zhaoxiang, Li Feng, the People's Republic of China. Chemical Industry Standards. Aviation Tire Valve Core. HG 2485 -- 93. Edited by Chemical Industry Standards Editorial Department. (Standardization Research Institute of the Ministry of Chemical Industry) Postal Code: 100013. Printing. Standardization Research Institute of the Ministry of Chemical Industry. Copyright reserved. No reproduction allowed. Format 880× 1330 1 / 16 Printing Sheet 4 Words 18 0001993 October 1st edition
1993 October 1st printing
Print run 1 — 500
1. Book cost 2. 60 yuan
2485-91
Trial production and setting of new products or old products for transfer to factory production; after formal production, if there are major changes in structure, materials, and processes, which may affect product performance: in normal production, a periodic inspection should be carried out for every 100,000 valve cores produced. When production is stopped for more than one year and production is resumed:
When there is a big difference between the factory inspection result and the last type inspection; when the national quality supervision agency proposes a type inspection requirement. Inspection batch
A batch of products manufactured for production finalization inspection, or a batch of products manufactured within a specified period during mass production after production finalization inspection is passed.
6.2.3 Classification of non-conformities
This standard divides non-conformities into Class A non-conformities, Class H non-conformities, and Class C non-conformities according to the importance of quality characteristics. Each type of project is further divided into several inspection groups, see Table 6.6.2.4 Rejection quality level (RQL) and discrimination level (DL) The rejection quality level (expressed as the number of rejected products per 100 units of product) and discrimination level of each inspection group shall comply with the provisions of Table 6. Table 6
Rejection classification
Inspection group
Air tightness
Core body sealing ring
Core seat sealing gasket
Opening force
5 V1 Thread
Core rod stroke
Should comply with the chapter number of this standard
6.2.5 Type According to the judgment of acceptance or rejection HG 248S — 93
The judgment of whether the type inspection is qualified or unqualified shall comply with the provisions of GB2829. 6.2.6 Disposal after type inspection
The disposal of type inspection shall comply with the provisions of GB2829. 7 Marking, packaging and storage
7.1 Marking
7.1. The manufacturer's mark shall be printed on the top of the valve core stem. 7.1. The following contents shall be printed on the valve core packaging box (box): manufacturer name and address, trademark;
b. Product name, model and manufacturing date, product quality grade, number of products in the box, this standard number, 7.* Packaging
When the valve core is packaged, moisture-proof measures shall be taken, and the product quality certificate shall be included in the packaging box. 7.3 Storage
1.3.1 The valve core should be stored in a warehouse with a temperature of 0-28℃ and a relative humidity of no more than 80%, and should be kept away from light, heat, oxygen, acids, alkalis and other harmful substances. 7.32 The warranty period of the valve core is 5 years from the date of manufacture. Additional Notes: This standard was proposed by the Science and Technology Department of the Ministry of Chemical Industry of the People's Republic of China. This standard originated from the Ministry of Chemical Industry's Shuguang Rubber Industry Research Institute. This standard was drafted by the Ministry of Chemical Industry's Shuguang Rubber Industry Research Institute. The relevant persons in charge of this standard are Ke Chaotan, Gan Baoxin, Liu Qihui, Zhong Zhaoxiang, Li Feng, the People's Republic of China. Chemical Industry Standards. Aviation Tire Valve Core. HG 2485 -- 93. Edited by Chemical Industry Standards Editorial Department. (Standardization Research Institute of the Ministry of Chemical Industry) Postal Code: 100013. Printing. Ministry of Chemical Industry Standardization Research Institute. Copyright reserved. No reproduction allowed. Format 880× 1330 1 / 16 Printing Sheet 4 Words 18 0001993 October 1st edition
1993 October 1st printing
Print run 1 — 500
1. Book cost 2. 60 yuan
2485-91
Trial production and setting of new products or old products for transfer to factory production; after formal production, if there are major changes in structure, materials, and processes, which may affect product performance: in normal production, a periodic inspection should be carried out for every 100,000 valve cores produced. When production is stopped for more than one year and production is resumed:
When there is a big difference between the factory inspection result and the last type inspection; when the national quality supervision agency proposes a type inspection requirement. Inspection batch
A batch of products manufactured for production finalization inspection, or a batch of products manufactured within a specified period during mass production after production finalization inspection is passed.
6.2.3 Classification of non-conformities
This standard divides non-conformities into Class A non-conformities, Class H non-conformities, and Class C non-conformities according to the importance of quality characteristics. Each type of project is further divided into several inspection groups, see Table 6.6.2.4 Rejection quality level (RQL) and discrimination level (DL) The rejection quality level (expressed as the number of rejected products per 100 units of product) and discrimination level of each inspection group shall comply with the provisions of Table 6. Table 6
Rejection classification
Inspection group
Air tightness
Core body sealing ring
Core seat sealing gasket
Opening force
5 V1 Thread
Core rod stroke
Should comply with the chapter number of this standard
6.2.5 Type According to the judgment of acceptance or rejection HG 248S — 93
The judgment of whether the type inspection is qualified or unqualified shall comply with the provisions of GB2829. 6.2.6 Disposal after type inspection
The disposal of type inspection shall comply with the provisions of GB2829. 7 Marking, packaging and storage
7.1 Marking
7.1. The manufacturer's mark shall be printed on the top of the valve core stem. 7.1. The following contents shall be printed on the valve core packaging box (box): manufacturer name and address, trademark;
b. Product name, model and manufacturing date, product quality grade, number of products in the box, this standard number, 7.* Packaging
When the valve core is packaged, moisture-proof measures shall be taken, and the product quality certificate shall be included in the packaging box. 7.3 Storage
1.3.1 The valve core should be stored in a warehouse with a temperature of 0-28℃ and a relative humidity of no more than 80%, and should be kept away from light, heat, oxygen, acids, alkalis and other harmful substances. 7.32 The warranty period of the valve core is 5 years from the date of manufacture. Additional Notes: This standard was proposed by the Science and Technology Department of the Ministry of Chemical Industry of the People's Republic of China. This standard originated from the Ministry of Chemical Industry's Shuguang Rubber Industry Research Institute. This standard was drafted by the Ministry of Chemical Industry's Shuguang Rubber Industry Research Institute. The relevant persons in charge of this standard are Ke Chaotan, Gan Baoxin, Liu Qihui, Zhong Zhaoxiang, Li Feng, the People's Republic of China. Chemical Industry Standards. Aviation Tire Valve Core. HG 2485 -- 93. Edited by Chemical Industry Standards Editorial Department. (Standardization Research Institute of the Ministry of Chemical Industry) Postal Code: 100013. Printing. Ministry of Chemical Industry Standardization Research Institute. Copyright reserved. No reproduction allowed. Format 880× 1330 1 / 16 Printing Sheet 4 Words 18 0001993 October 1st edition
1993 October 1st printing
Print run 1 — 500
1. Book cost 2. 60 yuan
2485-9
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