Automatic sprinkler system — Part 9: Early suppression fast response (ESFR) sprinklers English
GB 5135 Automatic sprinkler system consists or will consist of the following parts under the general title:
—Part 1: Sprinklers;
─Part 2: Wet system alarm valves, retard chamber, water motor alarm;
—Part 3: Water mist nozzles;
—Part 4: Dry pipe valves;
—Part 5: Deluge alarm valves;
—Part 6: Conventional valves;
—Part 7: Water flow indicators;
—Part 8: Accelerator;
—Part 9: Early suppression fast response (ESFR) sprinklers;
—Part 10: Pressure switch;
—Part 11: Grooved couplings and fittings;
—Part 13: Performance requirements and test methods of drencher nozzle
—Part 14: Preaction devices;
—Part 15: Domestic sprinklers;
—Part 16: Flexible sprinkler hose with fittings;
—Part 17: Pressure reducing valves;
—Part 18: Pipe hangers;
—Part 19: Plastic pipe and fittings;
—Part 20: Coating steel pipe;
—Part 21: Inspector's test connection;
—Part 22: Specific application sprinklers;
...
This is Part 9 of GB 5135.
1 Scope
This standard specifies the classification of ESFR sprinklers, nominal operating temperature, color identification, model specification, requirements, test methods, inspection rules, packaging, transportation and storage, etc.
This standard is applicable to K202 (pendent and uprights), K242 (pendent and and upright), K323 (pendent), and K363 (pendent) ESFR sprinklers. For other types of ESFR sprinklers, refer to this part.
This part is not applicable to the specific application sprinklers.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB 5135.1 Automatic sprinkler system -- Part 1: Sprinklers
GB/T 7306.2 Pipe threads with 55 degree thread angle where pressure-tight joints are made on the threads -- Part 2: Taper internal and external threads
GB/T 9969.1 General principles for preparation of instructions for use of industrial products
GB/T 31431-2015 Standard burning items for class A fire test of extinguishing system
3 Terms and definitions
For the purpose of this document, the terms and definitions given in GB 5135.1 and the following apply.
3.1
conductivity factor
C
a measure of the heat conductance between the sprinkler's heat responsive element and the other components of the sprinkler, expressed in unit of (m/s)1/2
3.2
actual delivered density
ADD
density of water discharge penetrating the fire plume and reaching the surface of the comburent
3.3
early suppression
a characteristic of sprinkler performance whereby the first few operating sprinklers are able to deliver sufficient water to the fire to promptly reduce the fire growth and ultimately suppress the fire to an acceptable level
3.4
early suppression fast response (ESFR) automatic sprinklers
sprinklers that discharge water over a designed protection area in certain shape and density to provide early suppression against fire after the heat-sensitive elements are automatically started with prescribed temperature range under thermal action
4 Classification
4.1 Classification according to heat-sensitive elements
4.1.1 Fusible element ESFR sprinkler
ESFR sprinkler that opens by the melting of the heated alloy of a fusible element
4.1.2 Glass bulb ESFR sprinkler
ESFR sprinkler that is opened by the bursting of the glass bulb resulting from thermal expansion of the fluid filled in the glass bulb
4.2 Classification according to installation positions
4.2.1 Pendent ESFR sprinkler
ESFR sprinkler arranged by pendent installation such that the water flow is directed downwards against the deflector
4.2.2 Upright ESFR sprinkler
ESFR sprinkler arranged by upright installation such that the water flow is directed upwards against the deflector
5 Nominal operating temperature, color identification and model specification
5.1 Nominal operating temperature and color coding
See Table 1 for the nominal operating temperature and color identification of ESFR sprinkler.
Table 1 Nominal operating temperature and color identification
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Classification
5 Nominal operating temperature, color identification and model specification
6 Requirements
7 Test methods
8 Inspection rules
9 Packaging, transportation and storage
Annex A (Informative) Calculation method of error limit
Annex C (Informative) Analysis of the strength test for fusible elements
Annex D (Normative) Routine inspection
