GB5135.9-2018
Automatic sprinkler system—Part 9：Early suppression fast response (ESFR) sprinklers
自动喷水灭火系统 第9部分：早期抑制快速响应（ESFR）喷头
GB 5135.9-2018 is a current mandatory Chinese national standard for Automatic sprinkler system—Part 9：Early suppression fast response (ESFR) sprinklers. It appears in the Environment compliance cluster with a product safety focus and has an implementation date of Apr 1, 2019.
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 Early Suppression Fast Response (ESFR) sprinklers with nominal flow coefficients of K202 (pendent and upright), K242 (pendent and upright), K323 (pendent), and K363 (pendent). It is specifically designed for high-challenge fire hazards such as high-piled storage warehouses. This standard is mandatory for all manufacturers producing ESFR sprinklers for the Chinese market, and it explicitly excludes special application sprinklers.
Technical requirements
The standard mandates comprehensive physical and thermal performance criteria for ESFR sprinklers. It specifies general design rules, such as prohibiting rubber seals at the water outlet and ensuring components cannot be easily adjusted. Manufacturers must ensure the frame and thermal sensing elements withstand specific mechanical loads and fatigue stresses without permanent deformation or failure. It defines strict parameters for flow coefficient (K-factor) tolerances and water distribution performance. The standard requires specific Actual Delivered Density (ADD) limits, ensuring sufficient water penetrates the fire plume to reach the burning surface. Additionally, it sets boundaries for static operating temperatures, response time index (RTI), and conductivity factor (C). The document also outlines rigorous environmental and corrosion resistance requirements. Sprinklers must survive extreme conditions including vibration, impact, freezing, and high temperatures. Components must resist stress corrosion from ammonia, magnesium chloride, sulfur dioxide, hydrogen sulfide, and salt spray without compromising their operational integrity. Finally, it establishes fire suppression performance criteria through full-scale fire testing. This includes evaluating the maximum allowable number of operating sprinklers, ceiling steel beam temperature limits, and restrictions on flame propagation across aisles, using standardized plastic cup and foam plastic commodities.
Testing methods
The standard details a comprehensive suite of evaluation procedures, including hydrostatic seal and strength tests to verify pressure integrity. It mandates dynamic thermal tests using a wind tunnel to calculate the Response Time Index (RTI) and conductivity factor (C). Manufacturers must also conduct full-scale fire suppression tests using standardized commodities to evaluate actual fire performance. Furthermore, environmental durability is verified through salt spray, stress corrosion, and impact testing procedures.
FAQs
What products are regulated under GB 5135.9-2018?
The standard regulates Early Suppression Fast Response (ESFR) sprinklers with specific nominal flow coefficients of K202 (pendent and upright), K242 (pendent and upright), K323 (pendent), and K363 (pendent). It explicitly excludes special application sprinklers.
Are there any significant updates from the previous version of GB 5135.9?
Yes, compared to the 2006 version, this update added requirements for magnesium chloride stress corrosion resistance, K323 pendent sprinkler ADD and fire suppression performance, deflector strength, and K242 pendent sprinkler momentum requirements. It also modified dynamic thermal and fire suppression test methods.
How does GB 5135.9-2018 differ from international ISO standards?
The standard specifies precise testing parameters such as nominal operating temperatures, RTI values, and specific ADD limits. While it shares the fundamental testing philosophy of international ESFR standards (like NFPA or ISO standards), manufacturers must strictly adhere to the localized Chinese test configurations, fuel types, and pressure parameters detailed in this document to achieve CCC certification.
The summary above provides a high-level overview of GB 5135.9-2018. 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 5135.9-2018 today to access all detailed parameters, tables, and testing procedures.
Applicability hints
- Type
- Product
- CCS
- C83
- ICS
- 13.220.10
- Competent department
- National Fire and Rescue Administration
- Technical committee
- National Technical Committee on Fire Protection of Standardization Administration of China
Relationships
Replaces:GB 5135.9-2006