GB26410-2011
Explosion-proof fan
防爆通风机
GB 26410-2011 is a current mandatory Chinese national standard for Explosion-proof fan. It appears in the Electronics compliance cluster with a product safety focus and has an implementation date of Jan 1, 2012.
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 applies to general-purpose explosion-proof fans used for transporting flammable and explosive gases. It is specifically designed for environments where the medium temperature does not exceed 80°C, and the dust and solid impurity content is no more than 100mg/m³ with a diameter not exceeding 1mm. It does not apply to special-purpose explosion-proof fans, such as marine or coal mine explosion-proof fans. This standard is crucial for manufacturers of industrial ventilation equipment operating in hazardous environments.
Technical requirements
The standard outlines comprehensive requirements for the design, manufacturing, and safety of explosion-proof fans. Key areas include aerodynamic performance, where the deviation of measured pressure and efficiency from specified values is strictly regulated. It also sets limits on noise levels and bearing temperature rise, alongside vibration velocity limits for both rigid and flexible supports. In terms of structural design, the standard mandates a minimum service life of 10 years and requires that rotating and stationary parts avoid friction to prevent sparks. Material selection is critical; for instance, if the impeller uses aluminum alloy, the inlet chamber and casing must be made of carbon steel. Specific material combinations are enforced to ensure no sparks are generated upon accidental contact. The standard details manufacturing and assembly requirements, including tolerances for radial clearance between the impeller and casing. It references various technical conditions for castings, welding, and riveting to ensure structural integrity. Furthermore, safety requirements are mandatory, particularly regarding the use of flameproof motors and electrical accessories compliant with GB 3836.1, GB 3836.2, and GB 3836.3. Proper grounding devices and protective guards are strictly required to prevent electrostatic sparks and ensure operational safety.
Testing methods
Testing procedures include mechanical operation tests to measure bearing temperature rise and vibration after stabilization. Aerodynamic performance tests are conducted according to standardized wind tunnel methods. Additionally, noise measurements and impeller overspeed tests are mandatory to verify structural integrity and compliance with safety limits.
FAQs
What products are regulated under GB 26410-2011?
GB 26410-2011 regulates general-purpose explosion-proof fans designed to transport flammable and explosive gases, provided the medium temperature does not exceed 80°C and impurity levels are within specified limits.
Are there specific material requirements for explosion-proof fans under this standard?
Yes, the standard specifies strict material combinations to prevent sparks. For example, if an aluminum alloy impeller is used, the casing must be carbon steel. Materials that do not produce sparks upon friction must be selected for rotating and stationary parts.
What are the mandatory safety requirements for the electrical components?
The fans must be equipped with flameproof motors and electrical accessories that comply with GB 3836.1, GB 3836.2, and GB 3836.3. Additionally, permanent grounding devices and protective guards are mandatory.
The summary above provides a high-level overview of GB 26410-2011. 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 26410-2011 today to access all detailed parameters, tables, and testing procedures.
Applicability hints
- Type
- Safety
- CCS
- J72
- ICS
- 23.120
- Competent department
- Ministry of Industry and Information Technology
- Technical committee
- Ministry of Industry and Information Technology