GB5135.16-2010
Automatic sprinkler system - Part 16：Flexible sprinkler hose with fittings
自动喷水灭火系统 第16部分：消防洒水软管
GB 5135.16-2010 is a current mandatory Chinese national standard for Automatic sprinkler system - Part 16：Flexible sprinkler hose with fittings. It appears in the Environment compliance cluster with a product safety focus and has an implementation date of Mar 1, 2011.
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
GB 5135.16-2010 applies specifically to flexible sprinkler hoses with fittings used in automatic sprinkler systems. It covers the classification, model designation, technical requirements, and testing methods for these flexible metal hoses, which serve as the terminal connection between the piping network and the fire sprinkler heads. This standard is mandatory for manufacturers producing flexible sprinkler hoses for the Chinese fire protection market. It does not apply to rigid piping or other types of fire-fighting valves and fittings covered by different parts of the GB 5135 series.
Technical requirements
The standard mandates that the rated working pressure of the flexible sprinkler hose shall not be less than 1.2 MPa. Materials in contact with water must be made of corrosion-resistant materials, such as austenitic stainless steel, to ensure long-term reliability. Manufacturers must ensure strict compliance with material specifications to prevent corrosion and failure. Structural and dimensional requirements dictate that threaded connections must comply with GB/T 7306 standards, and the hose must feature specific fixing components at the terminal end. The standard sets strict limits on elongation deformation, stating that the hose's elongation rate must not exceed 5% of its original length when pressurized. The standard outlines rigorous performance criteria including bending fatigue resistance, resistance to alternating water shock, and vibration resistance. The hose must withstand severe mechanical and hydraulic stresses without structural damage or leakage. Additionally, environmental resistance tests ensure that sealing components (like O-rings) can endure extreme high and low temperatures without compromising the seal. Finally, the standard specifies requirements for local resistance loss, expressed as an equivalent length. The deviation of the equivalent length must not exceed 10% of the manufacturer's published value, ensuring accurate hydraulic calculations for system design.
Testing methods
The standard outlines several critical testing procedures to verify compliance. The Bending Fatigue Test evaluates the hose's flexibility and structural integrity by subjecting it to 50,000 bending cycles at the minimum bending radius under rated internal water pressure. The Hydrostatic Strength and Seal Tests assess the hose's ability to withstand 2 times the rated working pressure for sealing and 4 times for structural integrity without bursting. These tests are critical for ensuring the hose will not fail during emergency fire-fighting operations. Additionally, an Environmental Resistance Test exposes the hose's sealing components to extreme temperatures (135°C and -40°C) to verify long-term durability, while the Equivalent Length Test measures local resistance loss to ensure hydraulic performance matches manufacturer specifications.
FAQs
What products are regulated under GB 5135.16-2010?
This standard regulates flexible sprinkler hoses with fittings (ZSSR), which are the flexible metal hoses used at the end of automatic sprinkler systems to connect the piping to the sprinkler heads.
Is GB 5135.16-2010 a mandatory standard?
Chapter 6 of the standard is mandatory, while the remaining chapters are recommended. Manufacturers must strictly comply with the technical requirements and testing methods outlined in Chapter 6 to achieve market approval.
What is the rated working pressure requirement for fire sprinkler flexible hoses under this standard?
The standard requires that the rated working pressure of the hose must be no less than 1.2 MPa. Additionally, it must withstand a hydrostatic strength test at 4 times the rated working pressure without leakage or rupture.
The summary above provides a high-level overview of GB 5135.16-2010. 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 5135.16-2010 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