Water Spray Nozzle Arrangement for Vertical Vessel-Part 1 

Here's how I conceptualize using AutoCAD the water spray nozzle arrangement for vertical vessels.
Step 1: Find the surface area of the protected equipment
Step 2. Select an ideal spray pattern (i.e 90deg, 120 deg, 140deg)
Step 3. Arrange the spray nozzle such that the spray pattern will meet or overlap.
Step 4. Identify how many levels or rings of spray nozzles are required considering the allowable 3.7m maximum rundown per NFPA 15.
Step 5. Find the required spray nozzle k-factor.
Not covered in this part 1 are the following steps:
Step 6. Determine the suitable pipe size.
Step 7. Perform hydraulic calculation of the fixed water spray system to determine the required supply pressure and flow rate at the deluge valve.
Step 8. Prepare the hydraulic calculation report.
CREDITS
[1] Soundtrack Title : Champlain
from filmstro.com/m...
[2] Soundtrack Title : Embudo
from filmstro.com/m...
[3] Soundtrack Title : Wanaka
from filmstro.com/m...
[4] Soundtrack Title : Happy Whistle by Scott Holmes
from freemusicarchiv...
[5] Soundtrack Title : Cheerful Whistling by
Free Music | / fm_freemusic
Music promoted by www.free-stock...
Creative Commons Attribution 3.0 Unported License
creativecommon...
[6] Tyco D-3 Spray Nozzle
from www.tyco-fire....
[7] Trial version of Autocad LT 2021.