What is water spray test?
The spray-test determines the water repellence of each type of fabric, treated or not treated with a water repellent finish. It is an easy to use test, which gives quick results and meets the ISO 4920 standard.
What must be the size of the nozzle when applying hose water test?
The guide for testing is very specific. A constant pressure of between 30-35 psi is applied from a ¾” (19 mm) diameter hose fitted with a nozzle. It is recommended to fit the nozzle with a gauge to measure distance from the test surface.
How do you test your windows for water?
To test the water tightness of your building’s windows, TSI uses AAMA 501.2. During this testing a constant stream of water is sprayed over a 5 foot section of glass and window frame to determine if there is a leak in the window system.
What is ASTM E1105?
ASTM E1105. The ASTM E 1105 (Standard Test Method for Field Determination of Water Penetration of Installed Exterior Windows, Skylights, Doors, and Curtain Wall by Uniform or Cyclic Static Air Pressure) is the “go to” standard when field testing newly installed fenestration products.
How do you calculate nozzle discharge?
To work out the flow rate of water from a nozzle we need to work out the volume in a given period of time. To do this we work out the area of the nozzle and then multiply it by the velocity of the water coming from the nozzle to give us volume per unit of time.
How do I know what size spray nozzle to buy?
First, examine the coating that will be sprayed. Put simply, heavier coatings will require a larger orifice size than lighter ones. For example, primers are usually thicker than the accompanying paint so you should use a 1.7 or 1.8 mm tip to prime most surfaces.
How do you find air leaks in your windows?
On a cold day, hold your hands an inch away from the window frame and feel for any drafts. If you can’t see or feel air leaks, then conduct a flame test with a candle. Light the candle and trace the outline of your window. If the flame and smoke pull in one direction, then you have found an air leak.
What is ASTM E11?
The ASTM Committee E11 on Quality & Statistics promotes the appropriate use of principles, statistics and quality control methods related to materials production and use. The committee has jurisdiction over 29 approved standards and is mandated to develop, produce and maintain standards that enhance quality assurance.
Does a nozzle increase pressure?
In a convergent nozzle, there is an increase in velocity and a decrease in pressure, but we know that pressure is inversely proportional to area. The pressure drops in a convergent nozzle because of the Bernoulli Principle.
What is nozzle discharge?
In a nozzle or other constriction, the discharge coefficient (also known as coefficient of discharge or efflux coefficient) is the ratio of the actual discharge to the theoretical discharge, i.e., the ratio of the mass flow rate at the discharge end of the nozzle to that of an ideal nozzle which expands an identical …