GB3446-2013

Siamese connection

消防水泵接合器

GB 3446-2013 は現行の中国強制国家規格です：Siamese connection。業界：環境。テーマ：製品安全。施行日：2014年8月1日。

適用可否は製品範囲、認証ルート、所管当局の通知、移行規定によって異なります。コンプライアンス判断に使う前に、翻訳をご依頼いただくか公式情報源をご確認ください。

コンプライアンス概要

この概要は現在英語のみで提供しています。

適用範囲

This standard applies to various types of siamese connections (fire department connections) used in fire protection piping systems. It covers connections installed above ground, underground, on walls, and multi-purpose types. It is mandatory for manufacturers producing fire protection equipment for the Chinese market. The standard specifies requirements based on nominal diameters of 100mm and 150mm, and nominal pressures of 1.6MPa, 2.5MPa, and 4.0MPa.

技術要求

The standard outlines mandatory technical specifications in Chapters 5, 7, and 8. It defines structural requirements, ensuring that the design allows for complete drainage of residual water between the fire interface and the check valve. Material specifications vary by nominal pressure, requiring grey cast iron, ductile cast iron, brass, or stainless steel depending on the pressure rating. Manufacturers must strictly adhere to the specified material grades to ensure structural integrity. Key performance requirements include sealing performance under nominal pressure and hydrostatic strength at 1.5 times the nominal pressure, where no leakage or damage is permitted. The standard also details specific parameters for safety valves, including opening pressure and pressure difference limits, as well as requirements for fire interfaces complying with GB 12514.1 and GB 12514.2-2006.

試験方法

Testing procedures include visual inspection of structure and appearance, mechanical property testing for cast iron and copper materials, and dimensional checks for threads and flanges. Critical performance tests involve sealing performance tests under nominal pressure and hydrostatic strength tests at elevated pressures. Additionally, it specifies procedures for testing the safety valve's opening pressure and opening/closing pressure difference, along with performance evaluations for fire interfaces.

よくある質問

What products are regulated under GB 3446-2013?

GB 3446-2013 regulates siamese connections (fire department connections) used in fire protection piping systems, including above-ground, underground, wall-mounted, and multi-purpose types.

Are there any updates from the previous version of GB 3446?

Yes, compared to the 1993 version, this standard adds terminology, introduces a 4.0MPa nominal pressure category, specifies connection methods, and adds material requirements for inlet interfaces and anti-corrosion treatments for cast iron parts.

Which chapters of GB 3446-2013 are mandatory?

Chapters 5, 7, and 8 are mandatory, covering technical requirements, inspection rules, and marking. The remaining chapters are recommended.

The summary above provides a high-level overview of GB 3446-2013. 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 3446-2013 today to access all detailed parameters, tables, and testing procedures.

適用のヒント

種別: 製品
CCS: C84
ICS: 13.220.10
所管部門: National Fire and Rescue Administration
技術委員会: National Technical Committee on Fire Protection of Standardization Administration of China