GB/T 13344-2019 in English
VALIDDown-the-hole hammers and bits
- Issued on:2019-08-30
- Implemented on:2020-03-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$194.00
《GB/T 13344-2019潜孔冲击器和潜孔钻头》由TC88（全国矿山机械标准化技术委员会）归口，主管部门为中国机械工业联合会。
Introduction
Interpretation of the National Standard of the People's Republic of China GB/T 13344—2019
| Category | Main Technical Changes | New Content | Modified Content |
|---|---|---|---|
| Definition of Terms | Definitions of Low-pressure, Medium-pressure and High-pressure DTH Impactors are clarified | Technical requirements for heat-treated parts, assembly quality and surface coating quality are added | - |
| Models and Basic Parameters | Impactor specification series and basic parameter tables are updated | Added drill bit model representation method | Modified the thread specifications of the rear joint of the impactor |
| Technical requirements | New service life indicators | New test method chapter | Delete some outdated test requirements |
Standard formulation background and technology evolution analysis
GB/T 13344—2019 is a comprehensive revision of the original standard GB/T 13344—2010, mainly based on the following background:
- Technological progress and equipment renewal needs in the mining machinery industry
- Increase in product performance requirements due to domestic and foreign market competition
- Technical development trends in environmental protection and energy saving and efficiency improvement
Professional terminology explanation and practical application cases
Down-the-hole impactor and Down-the-hole drill bits are the core components of mining rock drilling machinery and are widely used in metal mines, building materials mines, and hydropower engineering. For example, in the application of low-pressure down-the-hole impactors, their working pressure is less than 0.7 MPa, which is suitable for shallow rock drilling operations in small and medium-sized mines.
Implementation Recommendations Chapter
- Enterprise level: It is recommended that mining machinery manufacturers carry out technical transformation of existing equipment in accordance with the new standards, focusing on improving the quality of heat treatment, assembly and painting.
- User level: Construction units should select appropriate matching combinations of impactors and drill bits according to geological conditions, and refer to the working parameter table in Appendix A to ensure optimal operating efficiency.
- Testing agencies: Strengthen the promotion and training of standards, and establish test methods and inspection systems that meet the requirements of the new standards.
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