GB28242-2012
Screw presses - Safety requirements
螺旋压力机 安全技术要求
GB 28242-2012 is a current mandatory Chinese national standard for Screw presses - Safety requirements. It appears in the Electronics compliance cluster with a product safety focus and has an implementation date of Jan 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 specifies the safety requirements for screw presses, including friction screw presses, electric screw presses, hydraulic screw presses, and clutch-type screw presses. It is mandatory for all manufacturers and importers of these specific press types into the Chinese market. The standard does not apply to other types of metalforming machinery not explicitly listed in its scope.
Technical requirements
The standard outlines comprehensive safety requirements, with Chapters 5 and 6 designated as mandatory. It mandates that risks must be eliminated or minimized through design, and residual risks must be addressed using safety guards and protective devices. Manufacturers must ensure that presses do not pose hazards during manufacturing, installation, maintenance, and operation. For mechanical hazards, the standard requires the elimination of sharp edges, the installation of upper and lower limit indicators for the slide stroke, and the use of buffer devices to prevent rigid impacts if brakes fail. It also mandates safety scotches interlocked with the control system during die adjustment or maintenance, and overload protection for forging presses with a nominal force greater than 4000 kN. Regarding control systems, the standard specifies that each start control must have an adjacent stop control, and every operating position must be equipped with an emergency stop device. It sets maximum operating forces for controls (e.g., hand control force ≤ 50N, foot pedal force ≤ 80N) and requires interlocks between different operating modes to prevent accidental start-ups. The standard also details requirements for electrical safety, hydraulic and pneumatic systems, and noise limits. It mandates compliance with GB 5226.1 for electrical equipment and GB 150.1-150.4 for pressure vessels like accumulators and air receivers. Work platforms, ladders, and guardrails must be installed for operations above 3 meters.
Testing methods
Compliance verification involves four primary methods: visual inspection, measurement, performance checking/testing, and drawing/calculation review. The standard provides a comprehensive matrix mapping each specific safety requirement to one or more of these verification methods. For instance, mechanical strength and control interlocks are typically verified through performance tests, while electrical safety requirements like protective grounding continuity and insulation resistance are verified according to the procedures in GB/T 24342 and GB 5226.1.
FAQs
What products are regulated under GB 28242-2012?
GB 28242-2012 regulates the safety of screw presses, specifically including friction screw presses, electric screw presses, hydraulic screw presses, and clutch-type screw presses.
Are there any mandatory chapters in GB 28242-2012?
Yes, Chapters 5 and 6 are designated as mandatory. These chapters cover safety requirements/measures and usage information, meaning compliance with these sections is legally required for market access in China.
How does GB 28242-2012 relate to other Chinese standards?
The standard extensively references other national standards, such as GB 5226.1 for electrical equipment safety, GB 17120 for general forging machine safety, and GB 150.1-150.4 for pressure vessels, integrating them into its overall safety framework.
The summary above provides a high-level overview of GB 28242-2012. 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 28242-2012 today to access all detailed parameters, tables, and testing procedures.
Applicability hints
- Type
- Safety
- CCS
- J62
- ICS
- 25.120.10
- Competent department
- Ministry of Industry and Information Technology
- Technical committee
- Ministry of Industry and Information Technology
Relationships
Partially replaced by:GB 17120-2025 (Current)