GB6246-2011
Fire hose
消防水带
GB 6246-2011 is a current mandatory Chinese national standard for Fire hose. It appears in the Environment compliance cluster with a product safety focus and has an implementation date of Jun 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 fire hoses, specifically covering lined fire hoses and fire wet hoses used in firefighting operations. It establishes the model designations, performance requirements, and testing methods for these products. It is not applicable to unlined fire hoses, as it specifically replaces the older standards for such products to focus on modern lined and wet hose variants.
Technical requirements
The standard specifies comprehensive physical and mechanical requirements for fire hoses. It mandates strict tolerances for nominal internal diameter and length, alongside limits for unit length mass. Manufacturers must ensure hoses meet specific design working pressure, test pressure, and minimum burst pressure limits without warp thread fracture. For fire wet hoses, the standard dictates specific water seepage rates under both low and design working pressures to ensure adequate wetting without spraying. Furthermore, the standard sets maximum allowable limits for axial elongation and diameter expansion under pressure, and explicitly states that hoses must not twist counterclockwise under water pressure. Additional performance criteria include bendability without wrinkling, adhesion strength between layers, low-temperature flexibility, and abrasion resistance.
Testing methods
The standard outlines various evaluation procedures, including hydrostatic and burst pressure tests to verify structural integrity. It details specific measurement techniques using plug gauges for internal diameters and steel measuring tapes for length. Specialized tests include the wet hose water seepage test using collection troughs, the adhesion test using an electric drying oven, and the low-temperature resistance test conducted at -30°C. Furthermore, it specifies procedures for elongation and expansion measurement, bendability testing, thermal air aging, and an abrasion resistance test utilizing a rotating sample with a weighted grinding head.
FAQs
What products are regulated under GB 6246-2011?
The standard regulates lined fire hoses and fire wet hoses used in firefighting operations. It does not apply to unlined fire hoses, which were regulated under the now-superseded GB 4580-1984.
Are there any updates from the previous version of GB 6246?
The current version integrates and supersedes the previous GB 6246-2001 and GB 4580-1984. Major updates include the addition of performance requirements and test methods for fire wet hoses, abrasion resistance, and hose-to-coupling connection performance, as well as modified torsional performance criteria.
How does GB 6246-2011 differ from ISO standards?
While the standard references some general international testing methodologies (like GB/T 528 and GB/T 1040.1 for tensile properties, which share similarities with ISO standards), it is a distinct Chinese national standard with specific mandatory pressure, torsion, and abrasion resistance parameters tailored to domestic fire safety requirements.
The summary above provides a high-level overview of GB 6246-2011. 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 6246-2011 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