Test method for tyre valve - Part 6: Test method for core
1 Scope
This document specifies the test equipment, instruments, installation, air-tightness test, torque test, fatigue test, ventilation rate test, corrosion resistance test, connection test between swivel and plug, opening pressure test and pin head position measurement of tyre cores (hereinafter referred to as “cores”).
This document is applicable to the test for tyre valve cores of passenger cars, trucks, industrial trucks, construction machinery, tractors, agricultural and forestry machinery, motorcycles, electric vehicles and cycles.
This document is not applicable to the core test for aircraft tyres.
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 1796.6 Tyre valves - Part 6: Cores
GB/T 9764 Tyre valve core chambers
GB/T 10125-2012 Corrosion tests in artificial atmospheres - Salt spray tests
GB/T 12839 Terms and definitions of tyre valves
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 12839 apply.
4 Test equipment and instruments
The test equipment and instruments for cores are as follows.
a) Low-temperature test chamber: the temperature in the chamber may be lower than -40℃, with a fluctuation of ±2℃.
b) High-temperature test chamber: the temperature in the chamber may be over 200℃, with a fluctuation of ±2℃.
c) Salt spray test chamber: it shall meet the requirements of GB/T 10125-2012.
d) Tensile testing machine: with a load of 0N~2,000N, and a relative variation of the indicating value of 1%.
e) Pressure gauge: with an indicating value of 0kPa~2,500kPa, and a precision grade of 1.6.
f) Gas flowmeter: with an indicating value of 0L/min~500L/min, and a precision grade of 1.0.
g) Stopwatch.
h) Special torque wrench: with an accuracy level of 5.
i) Pressure regulating valve: 0kPa~2,500kPa.
j) Air-tightness test device for core (see Figure 1).
k) Ventilation rate test device for H01, H06C and H02 cores (see Figure 2).
l) Opening pressure test device for H01 and H02 cores (see Figure 3).
Foreword i
Introduction iii
1 Scope
2 Normative references
3 Terms and definitions
4 Test equipment and instruments
5 Installation
6 Air-tightness test
7 Torque test
8 Fatigue test
9 Ventilation rate test
10 Corrosion resistance test
11 Connection test between swivel and plug
12 Opening pressure test
13 Pin head position measurement
Test method for tyre valve - Part 6: Test method for core
1 Scope
This document specifies the test equipment, instruments, installation, air-tightness test, torque test, fatigue test, ventilation rate test, corrosion resistance test, connection test between swivel and plug, opening pressure test and pin head position measurement of tyre cores (hereinafter referred to as “cores”).
This document is applicable to the test for tyre valve cores of passenger cars, trucks, industrial trucks, construction machinery, tractors, agricultural and forestry machinery, motorcycles, electric vehicles and cycles.
This document is not applicable to the core test for aircraft tyres.
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 1796.6 Tyre valves - Part 6: Cores
GB/T 9764 Tyre valve core chambers
GB/T 10125-2012 Corrosion tests in artificial atmospheres - Salt spray tests
GB/T 12839 Terms and definitions of tyre valves
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 12839 apply.
4 Test equipment and instruments
The test equipment and instruments for cores are as follows.
a) Low-temperature test chamber: the temperature in the chamber may be lower than -40℃, with a fluctuation of ±2℃.
b) High-temperature test chamber: the temperature in the chamber may be over 200℃, with a fluctuation of ±2℃.
c) Salt spray test chamber: it shall meet the requirements of GB/T 10125-2012.
d) Tensile testing machine: with a load of 0N~2,000N, and a relative variation of the indicating value of 1%.
e) Pressure gauge: with an indicating value of 0kPa~2,500kPa, and a precision grade of 1.6.
f) Gas flowmeter: with an indicating value of 0L/min~500L/min, and a precision grade of 1.0.
g) Stopwatch.
h) Special torque wrench: with an accuracy level of 5.
i) Pressure regulating valve: 0kPa~2,500kPa.
j) Air-tightness test device for core (see Figure 1).
k) Ventilation rate test device for H01, H06C and H02 cores (see Figure 2).
l) Opening pressure test device for H01 and H02 cores (see Figure 3).
Contents of GB/T 9766.6-2021
Foreword i
Introduction iii
1 Scope
2 Normative references
3 Terms and definitions
4 Test equipment and instruments
5 Installation
6 Air-tightness test
7 Torque test
8 Fatigue test
9 Ventilation rate test
10 Corrosion resistance test
11 Connection test between swivel and plug
12 Opening pressure test
13 Pin head position measurement
