GB3446-2013

Siamese connection

消防水泵接合器

GB 3446-2013은(는) 현행 중국 강제 국가 표준입니다: Siamese connection. 산업: 환경. 주제: 제품 안전. 시행일: 2014년 8월 1일.

적용 여부는 제품 범위, 인증 경로, 주관 당국 공고, 전환 규정에 따라 달라집니다. 컴플라이언스 판단에 사용하기 전에 번역을 의뢰하거나 공식 출처를 확인하세요.

컴플라이언스 개요

이 개요는 현재 영어로만 제공됩니다.

적용 범위

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.

기술 요구 사항

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.

시험 방법

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.

자주 묻는 질문

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.

적용 참고 사항

유형: 제품
CCS: C84
ICS: 13.220.10
주관 부처: National Fire and Rescue Administration
기술 위원회: National Technical Committee on Fire Protection of Standardization Administration of China