GB5135.22-2019
Automatic sprinkler system—Part 22:Specific application sprinklers
自动喷水灭火系统 第22部分：特殊应用喷头
GB 5135.22-2019 is a current mandatory Chinese national standard for Automatic sprinkler system—Part 22:Specific application sprinklers. It appears in the Environment compliance cluster with a product safety focus and has an implementation date of Jul 1, 2020.
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 specific application sprinklers with a nominal flow coefficient K greater than or equal to 161, featuring larger water droplet sizes. It covers both non-storage type (CHSA) and storage type (CMSA) sprinklers used in high-hazard environments. This standard is not applicable to Early Suppression Fast Response (ESFR) sprinklers, which are governed by GB 5135.9.
Technical requirements
The standard mandates strict design and manufacturing criteria, emphasizing that sprinklers must not be easily adjusted or disassembled, and explicitly prohibits the use of rubber seals for the water outlet. It specifies requirements for threaded interfaces, appearance, and permanent markings. Manufacturers must ensure structural integrity and clear, permanent identification markings on the deflector or body. Performance requirements include strict tolerances for flow coefficients (K-values), water distribution uniformity, and static operating temperatures. The standard sets comprehensive dynamic thermal performance limits based on Response Time Index (RTI) values, categorizing sprinklers into quick response, special response, and standard response. Sprinklers must demonstrate reliable thermal sensitivity and operational functionality under various pressure conditions. Durability and resilience are heavily emphasized, requiring the sprinklers to withstand water impact, mechanical shocks, vibrations, collisions, and rolling. Furthermore, the sprinklers must endure extreme environmental conditions, including freeze resistance, high-temperature exposure, and long-term environmental temperature endurance. Products must maintain seal integrity and functionality after undergoing severe physical and environmental stress tests. The standard outlines rigorous corrosion resistance requirements, testing components against ammonia stress, magnesium chloride, sulfur dioxide, hydrogen sulfide, salt spray, and humid gases. Crucially, it defines comprehensive fire suppression performance criteria, requiring actual delivered density (ADD) tests and full-scale fire tests to ensure the sprinklers can effectively control fires in their designated scenarios.
Testing methods
The standard details a comprehensive suite of testing methodologies to verify compliance. Key tests include hydrostatic seal and strength tests to verify structural integrity under pressure, and flow coefficient measurements to ensure accurate water discharge. Engineers must perform dynamic thermal tests using a wind tunnel to accurately calculate the RTI values. Additionally, the standard mandates various environmental and corrosion tests (such as salt spray and sulfur dioxide exposure) alongside mechanical durability tests like vibration, impact, and collision testing. Finally, full-scale fire suppression tests using standard plastic and paper cup commodities are required to validate real-world performance.
FAQs
What products are regulated under GB 5135.22-2019?
This standard regulates specific application sprinklers with a nominal flow coefficient K greater than or equal to 161. It covers both non-storage (CHSA) and storage (CMSA) types. It does not apply to ESFR sprinklers, which are regulated under a separate standard (GB 5135.9).
Are there any specific testing requirements introduced in GB 5135.22-2019?
The standard mandates rigorous testing across multiple domains: dynamic thermal performance (RTI), multiple corrosion resistances, mechanical impacts, and large-scale fire suppression tests. Manufacturers must pass full-scale fire testing to verify real-world performance for both storage and non-storage applications.
How does GB 5135.22-2019 differ from international standards like ISO or NFPA?
While it shares similarities with international fire protection standards, GB 5135.22-2019 is tailored specifically for the Chinese market's high-hazard scenarios. Overseas manufacturers must ensure their products meet these specific Chinese testing parameters and certification marks to legally enter the market.
The summary above provides a high-level overview of GB 5135.22-2019. 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 5135.22-2019 today to access all detailed parameters, tables, and testing procedures.
Applicability hints
- Type
- Product
- CCS
- C84
- ICS
- 13.220.10
- Competent department
- National Fire and Rescue Administration
- Technical committee
- National Technical Committee on Fire Protection of Standardization Administration of China