GB28759-2012
Green sand mixer - Safety requirements
粘土砂混砂机 安全要求
GB 28759-2012 is a current mandatory Chinese national standard for Green sand mixer - Safety requirements. It appears in the Electronics compliance cluster with a product safety focus and has an implementation date of Oct 1, 2013.
Applicability depends on product scope, certification route, competent authority notices and transition rules. Requst for the translation or verify source before using this record in a compliance decision.
Compliance overview
Scope and applicability
This standard is mandatory for the design, manufacturing, and operation of green sand mixers. It specifically applies to fixed rotor mixers, planetary rotor mixers, pan rotating mixers, and various muller and swing wheel mixers, as well as their auxiliary equipment. Manufacturers and suppliers of these foundry machines must comply with this standard to enter the Chinese market. It references essential safety principles found in GB/T 15706.1 and GB 20905.
Technical requirements
The standard outlines comprehensive safety requirements to mitigate significant hazards identified during risk assessment. It mandates that equipment achieve intrinsic safety through design, supplemented by necessary safeguarding devices. Equipment must be designed to prevent mechanical, electrical, noise, and material-related hazards. For mechanical safety, the standard requires multi-level interlocks for discharge doors and moving parts, ensuring operation only when access doors are closed. It specifies that equipment must be in a zero mechanical state during maintenance to prevent accidental startup. For electrical safety, it mandates compliance with GB 5226.1, requiring reliable control systems with automatic monitoring and emergency stop functions. Regarding noise limits, the standard sets specific sound pressure level limits based on the mixer's pan diameter. It also requires effective dust collection systems to prevent the dispersion of clay and coal dust, addressing both health and explosion risks.
Testing methods
Compliance with the safety requirements is determined through a prioritized sequence of methods: functional testing to verify safety functions, instrumental measurement for quantitative limits like noise levels, calculation and drawing review for structural integrity, and visual observation for qualitative requirements. Manufacturers must ensure their equipment passes these verification methods before market entry. The standard also details requirements for user information, including warning labels and comprehensive instruction manuals.
FAQs
What products are regulated under GB 28759-2012?
It regulates green sand mixers, including fixed rotor, planetary rotor, pan rotating, muller, and swing wheel types, along with their auxiliary units.
Is GB 28759-2012 a mandatory standard?
Yes, this standard is fully mandatory for all relevant manufacturers and suppliers. Compliance is legally required for market access in China.
What are the noise limits specified in this standard?
The standard sets noise limits based on pan diameter: mixers with a pan diameter less than 2000mm must not exceed 80dB(A), while those equal to or greater than 2000mm must not exceed 85dB(A).
The summary above provides a high-level overview of GB 28759-2012. To ensure complete compliance for your products entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 28759-2012 today to access all detailed parameters, tables, and testing procedures.
Applicability hints
- Type
- Safety
- CCS
- J61
- ICS
- 25.120.30
- Competent department
- Ministry of Industry and Information Technology
- Technical committee
- Ministry of Industry and Information Technology