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GB/T 16623-2022 (GB/T16623-2022)

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GB/T 16623-2022: PDF in English (GBT 16623-2022)

GB/T 16623-2022
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 83.160.99
CCS G 41
Replacing GB/T 16623-2008
Technical Specification of Pressed-on Solid Tyres
ISSUED ON: OCTOBER 12, 2022
IMPLEMENTED ON: MAY 01, 2023
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative References ... 5
3 Terms and Definitions ... 6
4 Technical Requirements ... 6
5 Test Methods ... 7
6 Marking ... 7
Appendix A (Normative) Rims and Matching Dimensions of Tyres and Rims ... 8
Appendix B (Normative) Measurement Method for the Outer Edge Dimension of the
Tyre ... 10
Appendix C (Normative) Methods for Testing Physical and Mechanical Properties of
Tyre ... 12
Technical Specification of Pressed-on Solid Tyres
1 Scope
This Document specifies the technical requirements, test methods and markings for pressed-on
solid tyres.
This Document applies to new pressed-on solid tyres used on counterbalanced forklift trucks
and other industrial vehicles.
2 Normative References
The provisions in following documents become the essential provisions of this Document
through reference in this Document. For the dated documents, only the versions with the dates
indicated are applicable to this Document; for the undated documents, only the latest version
(including all the amendments) is applicable to this Document.
GB/T 528 Rubber, Vulcanized or Thermoplastic – Determination of Tensile Stress-Strain
Properties
GB/T 531.1 Rubber, Vulcanized or Thermoplastic – Determination of Indentation hardness
– Part 1: Durometer Method (Shore Hardness)
GB/T 1031 Geometrical Product Specifications (GPS) – Surface Texture: Profile Method
– Surface Roughness parameters and their Values
GB/T 1689 Rubber Vulcanized – Determination of Abrasion Resistance (Akron Machine)
GB/T 2941 Rubber - General Procedures for Preparing and Conditioning Test Pieces for
Physical Test Methods
GB/T 3512 Rubber, Vulcanized or Thermoplastic - Accelerated Ageing and Heat
Resistance Tests
GB/T 6326 Tyre Terms and Definitions
GB/T 7760 Rubber, Vulcanized or Thermoplastic - Determination of Adhesion to a Rigid
Substrate - 90 Degrees Peel Method
GB/T 8170 Rules of Rounding off for Numerical Values & Expression and Judgement of
Limiting Values
the rubber is broken.
5 Test Methods
5.1 The dimensions of the outer edge of the tyre shall be measured according to the provisions
of Appendix B.
5.2 Tensile strength, elongation at break, hardness and abrasion quantity shall be tested
according to the provisions of Appendix C.
5.3 The adhesion strength between metal and rubber shall be tested according to the provisions
of GB/T 7760.
5.4 The tyre durability shall be tested according to the provisions of GB/T 22391.
6 Marking
6.1 The sidewall of each tyre shall have the following markings:
a) specifications;
b) trademark, manufacturer's name or place of origin;
c) production number;
d) inspection mark.
6.2 6.1 a) ~ c) on the tyre sidewall shall be permanent marks; and 6.1 d) shall be marks that
cannot be washed off by water.
Appendix B
(Normative)
Measurement Method for the Outer Edge Dimension of the
Tyre
B.1 Measurement items
Outer perimeter and section width of tyre.
B.2 Measurement conditions
B.2.1 The tyre shall be parked at room temperature for more than 48h after vulcanization; and
the tire and rim assembly shall be parked at a temperature of 18°C ~ 36°C for at least 24h before
testing.
B.2.2 Measurement tools and their accuracy requirements are as follows:
a) steel ruler and metal tape (without curvature): 1mm;
b) vernier caliper: 0.1mm;
c) calipers.
B.3 Measurement method
B.3.1 The outer perimeter of the tyre
Use metal tape to wrap around the tyre along the centerline of the crown or near the highest
point of the centerline to measure the outer perimeter. The unit of measurement is millimeter;
round-off to an integer; and obtain the outer diameter according to Formula (B.1).
B.3.2 Section width of tyre
Select the widest part of the sidewall without a mark; and use a vernier caliper or a caliper and
a steel ruler to measure the section width at four points at approximately quarters of the tyre
circumference. Take the arithmetic mean value; the measurement unit is mm; rounded-off to an
integer.
B.4 Calculation method
The outer diameter of tyre shall be calculated according to Formula (B.1).
Appendix C
(Normative)
Methods for Testing Physical and Mechanical Properties of
Tyre
C.1 General requirements
C.1.1 The tyre shall be parked at room temperature for more than 48h after vulcanization; and
it shall be conditioned for at least 24h in the standard laboratory environment specified in GB/T
2941 before testing.
C.1.2 When the surface roughness and thickness of the sample or specimen taken from the tyre
is greater than the corresponding standard; it shall be cut and polished according to GB/T 2941.
When the thickness of the sample is less than the corresponding standard, it can be cut into
samples according to the actual thickness of the sample for testing.
C.2 Test for physical and mechanical performance of tread rubber
C.2.1 Tensile properties before and after aging
C.2.1.1 When sampling, for the tread part, take the centerline of the crown as the reference, and
take samples along the longitudinal direction; and cut a middle layer specimen if the thickness
of the tread rubber is 6mm~10mm. Cut the middle and lower layers of specimens (except for
the special cutting of the crown pattern) if the thickness of the tread rubber is more than 10mm.
C.2.1.2 Cut the sample, and polish into a Type 2 specimen conforming to GB/T 528; and mark
the position and level of the specimen.
C.2.1.3 When the tread pattern is special and the standard size specimen cannot be cut, the
clamping part of the specimen can be cut according to the actual situation.
C.2.1.4 Conduct the tensile property test according to GB/T 528; and perform the tensile
property test after aging according to GB/T 3512.
C.2.2 Hardness
C.2.2.1 Cut a sample from the tread with a length of no less than 40mm, a width of no less than
15mm, and a thickness of no less than 6mm; or stack up to three samples of the same layer to
form a specimen.
C.2.2.2 Measure the hardness of each layer of samples according to GB/T 531.1. The surface
......
 
(Above excerpt was released on 2022-12-22, modified on 2022-12-22, translated/reviewed by: Wayne Zheng et al.)
Source: https://www.chinesestandard.net/PDF.aspx/GBT16623-2022