Table of Contents
Which of the following sprinkler frame arms must be installed parallel to the branchline?
Upright sprinklers shall be installed with the frame arms parallel to the branch line, unless specifically listed for other orientation.
What triggers overhead sprinklers?
Fire sprinklers work because high heat triggers the sprinkler system. When a blaze ignites, the air directly above it heats rapidly. This hot air rises and spreads along the ceiling. When the air is hot enough and reaches a sprinkler head, it triggers a chain reaction.
How close can a hanger be to a sprinkler head?
3 inches
Clearance to hangers – the distance between a hanger and an upright sprinkler needs to be at least 3 inches (75mm). This is done to prevent the hanger from becoming an obstruction to sprinkler discharge.
Do fire sprinklers go off if you hit them?
Fire sprinkler heads, if tampered with, struck by tools or equipment, or damaged, can also go off without warning. Make sure your employees know never to hang seasonal decorations from sprinkler heads, which is a very common cause of accidental fire sprinkler activation discharge.
How hot does it have to be for a sprinkler to go off?
between 155 to 165 degrees Fahrenheit
Fire sprinkler systems are actually quite sophisticated, and are designed to be heat sensitive so that sprinklers only activate when the temperatures rise to fire-induced temps, usually somewhere between 155 to 165 degrees Fahrenheit.
What is deflector in sprinkler?
Deflectors: sprinkler head deflectors are the metal plates that direct the flowing water in the direction it needs to go. When water is released from the sprinkler head at activation, the stream hits the deflector and sprays outward.
Can you bend fire sprinkler pipe?
Certain press connect fittings have been listed for sprinkler use. Codes permit both copper tubing and steel pipe to be bent. However, the bending of the tubing or pipe cannot distort the pipe.
How tall should a 3 arm sprinkler be?
The Brass 3-Arm Rotating Sprinkler on Telescoping Base by Orbit provides you with the perfect sprinkler for your medium-sized areas. Water up to 50 feet in diameter from the twirling action of the three brass arms. The sprinkler adjusts from 23 to 35 inches tall, perfect for watering over growing gardens.
What is the maximum armover length for a pendent sprinkler?
Reason to ask, have an installation where the pendent sprinkler is attached to a ~6-ft long arm-over There is not a limit to armover length, but if it is in the remote area it would need to be accounted for in hydraulic calculations.
How many nozzles are in a sprinkler system?
The sprinkler features twelve individual nozzles mounted on three rotating arms. You can individually adjust the nozzles and arms to change the spray angle, giving you an almost infinite amount of fine control over the pattern. Larger angles will let you cover more area without creating any dead spots in the pattern.
What are the components of a return bend sprinkler?
Components of a Return Bend. A return bend is the piping arrangement for pendent sprinklers where piping stems from the top of the branch pipe (riser nipple), runs horizontally (arm over), and then down to the sprinkler (drop).