BS ISO 6182-14:2015 pdf download – Fire protection — Automatic sprinkler systems — Part 14: Requirements and test methods for water spray nozzles
K-factor for nozzles shall be in accordance with the manufacturer’s design and installation instructions whendetermined by the test method given in 7.3. Each flow constant K (caiculated), shall be within ±5% of themanufacturer’s value,for nozzles having a nominal k-factor of 40 or larger，and ±10% of themanufacturer’s value for nozzles having a nominal k-factor less than 40..
6.3 Water distribution (see 7.3)
When tested as described in 7.3.1 through 7.3.3, a spray nozzle shall produce a spray angle within ±10° of themanufacturer’s published water discharge angles.Other methods of determining nozzle spray angle shall bepermitted to be used provided the same level of accuracy is maintained.Stress Corrosion (see 7.4)
6.4 Stress Corrosion (see 7.4)
6.4.1Stress corrosion for copper alloy parts (see 7.4.1)
When tested in accordance with 7.4.1 , each nozzle shall show no cracks, delamination or degradation whichcould affect its ability to satisfy other requirements of this standard.
6.4.2Stress corrosion for stainless steel parts (see 7.4.2)
When tested in accordance with 7.4.2, each nozzle shall show no cracks, delamination or degradation whichcould affect its ability to satisfy other requirements of this standard.
Note: In some countries, this test is not mandatory.
6.5 Coated nozzles (see 7.5)
6.5.1 Evaporation of wax and bitumen (see 7.5.1)
Waxes and bitumens used for coating nozzles shall not contain volatile matter in sufficient quantities to causeshrinkage, hardening, cracking or flaking of the applied coating.The loss in mass shall not exceed 5 % of thatof the original sample when tested by the method in 7.5.1.
6.5.2Resistance to low temperatures (see 7.5.2)
All coatings used for nozzles shall not crack or flake when subjected to low temperatures by the method in7.5.2.
6.5.3Resistance to high temperature (see 7.5.3)
Coated nozzles shall withstand exposure to increased ambient temperatures without evidence of cracking,flaking, delamination, deformation or melting of the coating, when tested by the method specified in 7.5.3.
6.6 Resistance to heat (see 7.6)
Nozzles shall be resistant to high temperatures when tested in accordance with 7.6.After exposure, thenozzle shall not fracture or break. If visual deformation is observed in the water discharge path, it shall meetthe requirements of 6.2. If the nozzle is deformed, water distribution testing shall be conducted in accordancewith 6.3.
6.7 Vibration (see 7.7)
Nozzles having multiple components shall be able to withstand the effects of vibration without deteriorationwhen tested in accordance with 7.7.After the vibration test of 7.7, nozzles shall show no visible deteriorationor loosening of components.
6.8 lmpact (see 7.8)
Nozzles shall have adequate strength to withstand impacts associated with handling,transport and installationwithout deterioration of performance.After the impact test of 7.8.1; these nozzles shall show no fracture. lfthe nozzle is deformed, water distribution and strength testing shall be conducted in accordance with 6.3 and6.9.
6.9 Strength of water dispersing components (see 7.9)
The nozzle shall not show any signs of visible deterioration or loosening of components after the test specifiedin 7.9. If damage is noted, water distribution testing shall be conducted in accordance with 6.3.
7 Methods of test
The following tests shall be carried out for each type of nozzle. Before testing, precise drawings of parts andthe assembly shall be submitted together with the appropriate specifications. Tests shall be conducted at aroom temperature of 20 °C±10 °C, unless other temperatures are indicated.Nozzles shall be tested with allthe components required by their design and installation instructions.Unless otherwise stated, the tolerancesgiven in Annex A shall apply.
7.1 Preliminary examination
The construction shall be examined to ensure that it complies with the requirements of clause 5.7.1.1 Visual examination
Before testing, nozzles shall be examined visually with respect to the following points:a)marking,
b) conformity of the nozzles with the manufacturer’s drawings and specification,c)obvious defects.
7.2 Water flow constant (see 6.2)
The nozzle shall be mounted with a pressure gauge on a supply pipe as shown in Figure 1.
Four nozzles shall be tested.The frame arms and deflector of nozzles may be removed to facilitate testingprovided this does not impact the flow constant.BS ISO 6182-14 pdf download.