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BS ISO 6182-14:2015 pdf free

BS ISO 6182-14:2015 pdf free.Fire protection – Automatic nozzle systems – Requirements and test methods for water spray nozzles
Degrease the samples to be tested and then expose them for 10 d to a moist ammonia- air mixture in a glass container.
An aqueous ammonia solution, having a density of 0,94 g/cm3, shall be maintained in the bottom of the container, approximately 40 mm below the bottom of the samples. A volume of aqueous ammonia solution corresponding to 0,01 ml/cm3 of the volume of the container will give approximately the following atmospheric concentrations: 35% ammonia, 5% water vapor, and 60% air.
The moist ammonia-air mixture shall be maintained as closely as possible at atmospheric pressure, with the temperature maintained at (34 ± 2)°C. Provision shall be made for venting the chamber via a capillary tube to avoid the build-up of pressure. Specimens shall be shielded from condensate drippage. The glass container shall be placed in an enclosure which shall be heated uniformly to prevent condensate on the test sample.
Nozzles showing cracking or delamination shall not show evidence of separation of permanently attached parts when subjected to the water flow at the rated pressure for 30 min.
Four sets of uncoated or unplated stainless steel components and four previously untested nozzles shall be degreased and then exposed to a boiling magnesium chloride solution for a period of 150 (+12, -0)hours as described below, and in accordance with ASTM G36,Standard Practice for Evaluating Stress-Corrosion-Cracking Resistance of Metals and Alloys in a Boilling Magnesium Chloride Solution. Special fixtures or elevated temperature operating elements may be employed to simulate assembly loading on parts,where appropriate and necessary.
A 50 cm3 sample of wax or bitumen shall be placed in a metal or glass cyindrical container, having a flat bottom, an internal diameter of 55 mm and an internal height of 35 mm. The container, without lid, shall be placed in an automatically controlled electric, constant ambient temperature oven with air circulation. The temperature in the oven shall be controlled at 1 6°C below the nominal release temperature of the nozzle, but at not less than 50°C. The sample shall be weighed before and after 90 d exposure to determine any loss of volatile matter; the sample shall meet the requirements of 6.5.1.BS ISO 6182-14 pdf download.

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