GB 5135.3-2003Automatic sprinkler system - Part 3: Water mist nozzles (English PDF)

3 Terms and definitions

4 Classification, specifications and models

5 Requirements

6 Test methods

7 Inspection rules

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 5 and 7 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 3 of GB 5135.

This part was developed on the basis of GA 33-1992, Automatic sprinkler systems - Performance requirements and test methods for water mist nozzles.

Compared with GA 33-1992, the main changes in this part are as follows:

- the content of the water mist nozzle model designation has been adjusted (3.5 of the 1992 edition; 4.2 of this edition);

- a requirement for appearance, marking and connection threads has been added (5.1 of this edition);

- the requirements for flow characteristics have been adjusted (4.1 of the 1992 edition; 5.2 of this edition);

- the requirements for droplet size have been adjusted (4.4 of the 1992 edition; 5.5 of this edition);

- a requirement for downward spraying of water mist nozzles has been added to the spray performance requirements (4.3 of the 1992 edition; 5.6 of this edition);

- a requirement for nozzle strength has been added (5.7 of this edition);

- a requirement for ammonia stress corrosion has been added (5.8 of this edition);

- requirements for vibration resistance and mechanical impact resistance have been added (5.13 and 5.14 of this edition);

- corresponding requirements for closed water mist nozzles have been added (5.15 of this edition).

GA 33-1992 is abolished from the date of implementation of this part.

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.

Drafting organisation of this part: Tianjin Fire Research Institute of the Ministry of Public Security.

Main drafters of this part: Chuo Fengying, Yang Zhenming, Zhang Qiang, Zhao Yongshun, Chi Lifa.