GB/T 1192-2017 in English

《GB/T 1192-2017农业轮胎技术条件》由TC19（全国轮胎轮辋标准化技术委员会）归口，TC19SC1（全国轮胎轮辋标准化技术委员会汽车工农业机械轮胎轮辋分会）执行，主管部门为中国石油和化学工业联合会。

ChinaStandards.net is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.

This standard is developed in accordance with the rules given in GB/T 1.1-2009.

This standard replaces GB/T 1192-2008 Technical specification of agricultural tyres, and the following main technical changes have been made with respect to GB/T 1192-2008.

——The physical and mechanical performance index of the cover of agricultural radial tyre has been added (see Table 1 herein).

——Endurance requirements for agricultural radial tyres have been added (see 4.4 herein).

——The framework material code in 6.1d) has been deleted (see 6.1.1 of Edition 2008);

This standard was proposed by the China Petroleum and Chemical Industry Association.

This standard is under the jurisdiction of National Technical Committee on Tyres and Rims of Standardization Administration of China (SAC/TC 19).

The previous editions of the standard replaced by this standard are as follows:

——GB/T 1192-1974, GB/T 1192-1991, GB/T 1192-1999 and GB/T 1192-2008.


Technical specification of agricultural tyres

1 Scope

This standard specifies the terms and definitions, requirements, test methods, marking and packaging of agricultural tyres.

This standard is applicable to new pneumatic tyres (including covers and flaps) for agricultural and forestry tractors and machinery.

2 Normative references

The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced documents (including any amendments) applies.

GB/T 519 Test methods for measuring physical properties of pneumatic tyres
GB/T 521 Test method of measuring peripheral dimensions for tyres
GB/T 528 Rubber, vulcanized or thermoplastic — Determination of tensile stress-strain properties
GB/T 531 Rubber — Determination of indentation hardness by means of pocket hardness meters
GB/T 532 Rubber vulcanized or thermoplastic — Determination of adhesion to textile fabric
GB/T 1689 Rubber vulcanized — Determination of abrasion resistance (Akron machine)
GB/T 2979 Series of agricultural tyres
GB/T 6326 Tyre terms and definitions
GB/T 14828 Testing methods of traction performance for agricultural tyres
GB/T 34823 Endurance test method for agricultural tyres
HG/T 2177 Appearance quality of tyres
HG/T 2444 Agricultural tire abrasion resistance test methods — Double drum method

3 Terms and definitions

For the purposes of this standard, the terms and definitions given in GB/T 6326 apply.

4 Requirements

4.1 The size designation, inflation pressure and load capacity for tyres should meet the requirements in GB/T 2979.

4.2 The physical and mechanical properties of tyres shall meet those specified in Table 1.

Table 1 Physical and mechanical performance index of tyre
Item Index
Diagonal tyre cover Agricultural radial tyre cover Flap
Tensile strength/MPa ≥15.5a ≥16.0a ≥6.5
Elongation at break/% ≥450 (420)a ≥450a ≥350
Hardness (Shore A)/Degree 55~70a 55~70a —
Abrasion value (Akron)/cm3 ≤0.4a ≤0.38a —
Adhesion strength between tread compound/buffer compound and buffer ply/(kN/m) ≥7.8 (6.8) —
Adhesion strength between tread compound/buffer compound and ply/(kN/m) ≥6.8 (5.8)
Adhesion strength between buffer ply and ply/(kN/m) ≥4.8
Adhesion strength between plies/(kN/m)
Adhesion strength between sidewall rubber and ply/(kN/m) ≥5.5 (4.8) ≥6.0
Adhesion strength between tread compound and belt/(kN/m) — ≥ 8.0
Adhesion strength between belt and ply/(kN/m) ≥7.0
Adhesion strength between belts/(kN/m) ≥7.0
Note: Data in brackets apply to animal tyres.
a Refers to tread compound.

4.3 The appearance quality of tyres shall meet the requirements of HG/T 2177.

4.4 After endurance test of tyre, in appearance inspection, the tyre shall be free of defects such as (tread, sidewall, ply, inner liner, breaker and bead) separation, ply cracking, cords separation, cords break, chunking, open splice, chap and carcass abnormal deformation.

5 Test method

5.1 The overall diameter and section width of the tyre after inflation shall be measured according to GB/T 521.

5.2 Tensile strength and elongation at break of tread compound of cover shall be sampled according to GB/T 519 and tested with Type 2 cutter according to GB/T 528.

5.3 The hardness of tread compound of cover shall be determined according to GB/T 531.

5.4 The wear amount of tread compound of cover shall be sampled according to GB/T 519 and tested according to GB/T 1689.

5.5 The adhesion strength of each part of the cover shall be sampled according to GB/T 519 and tested according to GB/T 532.

5.6 Tyres may be tested for traction performance according to GB/T 14828.

5.7 Tyres may be tested for wear resistance according to HG/T 2444.

5.8 The endurance test of agricultural radial tyre shall be carried out according to GB/T 34823.

Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Requirements
5 Test method
6 Marking and packaging