What is a water spray Rack?
In the world of water intrusion, quality assurance, or forensic leak testing the calibrated spray rack is the tool of choice for the application of water onto a building. The spray rack is used to apply water directly onto a building in a very specific calibrated manner. no matter if the job is forensic or quality assurance the spray rack is the only tool used for this task.
The water-spray system in the context of the document refers to a crucial component used in the E1105 standard test method for determining the resistance of installed exterior windows, skylights, doors, and curtain walls to water penetration. Here is how the water-spray system is described and utilized based on the information provided in the document:
Description of the ASTM Water Spray System
The water-spray system is designed to deliver water uniformly against the exterior surface of the test specimen at a specified rate. It is a key element in the test method to evaluate the water penetration resistance of fenestration products.
Whats the Purpose of the Water-Spray System
The primary purpose of the water-spray system is to wet the test specimen uniformly for the purpose of assessing water resistance. It is not intended to replicate specific rain events but to provide a consistent and repeatable process for evaluation.
Water-Spray System Calibration
The water-spray system needs to be calibrated to ensure it delivers water at the specified rate. Calibration involves adjusting the intake water pressure to meet the calibrated pressure requirements as outlined in the standard.
Rate of the Water-Spray System
The water-spray system is required to deliver water at a minimum rate of 5.0 U.S. gal/ft2·h (3.4 L/m2·min) during the test. This rate is consistent with the requirements specified in other related test methods like E331 and E547 for fenestration water penetration testing.
Adjustability of the Water-Spray System
The system should be adjustable to provide the specified quantity of water in a manner that wets all areas of the test specimen uniformly and targets vulnerable areas to water penetration.
Uniformity of the Spray Rack System
The water-spray system should have nozzles spaced on a uniform grid, located at a uniform distance from the test specimen, to ensure uniform water spray coverage.
Calibration Verification of the Spray Rack
The calibration of the water-spray system needs to be verified periodically, with recalibration as necessary, but not exceeding intervals of six months.
In summary, the water-spray system is a critical component of the test apparatus used in the E1105 standard to simulate water exposure on exterior building components and assess their resistance to water penetration under specified conditions.