GB12514.4-2006
Fire coupling - Part 4: Patterns and basic parameters for fire screw-type coupling
消防接口 第4部分：螺纹式消防接口型式和基本参数
GB 12514.4-2006 is a current mandatory Chinese national standard for Fire coupling - Part 4: Patterns and basic parameters for fire screw-type coupling. It appears in the Construction compliance cluster with a product safety focus and has an implementation date of Aug 1, 2006.
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 specifies the patterns, specifications, and basic parameters for fire screw-type couplings. It is specifically applicable to suction hose couplings, blank caps, and same-type couplings used in fire water supply systems. Engineers manufacturing fire-fighting water delivery components must comply with this standard. It is not applicable to internal expansion or snap-type couplings covered in other parts of the GB 12514 series.
Technical requirements
The standard outlines the structural and dimensional requirements for screw-type fire couplings. It defines three main coupling types: KG (suction hose coupling), KA (blank cap), and KT (same-type coupling). The applicable medium is restricted to water. The standard sets specific nominal diameters ranging from 90mm to 150mm and nominal pressures of 1.0 MPa and 1.6 MPa. Chapters 4 and 5 regarding structural design and basic dimensions are mandatory. Dimensional tolerances for unmarked dimensions must comply with GB/T 1804-2000 (general tolerances). The standard also provides a specific marking method to identify the coupling type, nominal diameter, and pressure.
Testing methods
While specific testing procedures are not detailed in this part, compliance is verified through structural inspection and dimensional measurement. The coupling structures must conform to the designated reference diagrams, and all basic dimensions must meet the specified tolerance limits outlined in the standard's parameter tables.
FAQs
What products are regulated under GB 12514.4-2006?
It regulates screw-type fire couplings, specifically suction hose couplings (KG), blank caps (KA), and same-type couplings (KT) used in fire water supply systems.
Are there any mandatory clauses in GB 12514.4-2006?
Yes, Chapter 4 (Interface Structure) and Chapter 5 (Basic Dimensions) are mandatory, while the remaining clauses are recommended.
What nominal pressures and diameters are covered by this standard?
The standard covers couplings with nominal diameters of 90, 100, 125, and 150 mm, and nominal pressures of 1.0 MPa and 1.6 MPa.
The summary above provides a high-level overview of GB 12514.4-2006. To ensure complete compliance for your fire-fighting equipment entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 12514.4-2006 today to access all detailed parameter tables, structural diagrams, and marking requirements.
Applicability hints
- Type
- Product
- CCS
- C84
- ICS
- 13.220.20
- Competent department
- National Fire and Rescue Administration
- Technical committee
- National Technical Committee on Fire Protection of Standardization Administration of China