GB 5135.2-2003Automatic sprinkler system - Part 2: Wet system alarm valves, retard chamber, water motor alarm (English PDF)

3 Terms and definitions

4 Requirements

5 Test methods

6 Inspection rules

7 Marking and instructions for use

8 Packaging, transport and storage

Foreword

This part was issued on 8 October 2003 by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China and took effect on 1 May 2004.

Clauses 4 and 6 of this part are mandatory; the rest are recommended.

GB 5135 Automatic sprinkler system is at present planned to consist of 15 parts:

- Part 1: Sprinklers

- Part 2: Wet alarm valves, retard chambers and water motor alarms

- Part 3: Water mist nozzles

- Part 4: Dry pipe valves

- Part 5: Deluge valves

- Part 6: General-purpose valves

- Part 7: Water flow indicators

- Part 8: Accelerators

- Part 9: Early suppression fast response (ESFR) sprinklers

- Part 10: Pressure switches

- Part 11: Grooved pipe couplings and fittings

- Part 12: Extended coverage sprinklers

- Part 13: Water curtain nozzles

- Part 14: Preaction devices

- Part 15: Residential sprinklers

- ...

This part is Part 2 of GB 5135. This revision mainly refers to ISO/WD 6182.2, Automatic sprinkler systems - Requirements and test methods for wet alarm valves (English edition of 2000).

This part replaces GB 797-1989, Performance requirements and test methods for wet alarm valves of automatic sprinkler systems.

Compared with GB 797-1989, the main changes in this part are as follows:

- some definitions have been modified;

- the requirements of the standard have been rewritten in greater detail;

- in Clause 4, the basic parameters extend the range of rated working pressure grades and of nominal diameters of wet alarm valves;

- in Clause 4, an alarm test line has been added;

- a requirement for the clearances of wet alarm valves has been added;

- the leakage and deformation performance has been completed, and requirements for butterfly-type wet alarm valves have been added;

- the connection dimensions have been completed;

- a requirement for the hydraulic friction loss curve has been added;

- the alarm function has been modified, and requirements for the pressure switch have been added;

- a requirement for the water resistance of the water motor alarm has been added;

- test methods corresponding to some of the requirements have been added;

- the main clapper seal has been moved to an annex;

- the inspection rules have been modified;

- requirements for marking, packaging, transport and storage have been added.

Annex A and Annex B of this part are normative; Annex C is informative.

This part was proposed by the Ministry of Public Security of the People's Republic of China.

This part is under the jurisdiction of Subcommittee 2 of the National Technical Committee for Fire Protection Standardization (CSBTS/TC 113/SC 2).

Drafting organisations of this part: Tianjin Fire Research Institute of the Ministry of Public Security; Fire Bureau of the Zhejiang Provincial Public Security Department.

Main drafters of this part: Yang Zhenming, Bai Diantao, Chuo Fengying, Chen Zemin, Yan Xiaolong, Chi Lifa.

The editions of the standard replaced by this part are:

- GB 797-1989.