I think this is one of those things, just like with Hi-Ex foam generators, where you really want to get some input from the manufacturer.
From: Sprinklerforum [mailto:sprinklerforum-boun...@lists.firesprinkler.org] On Behalf Of Prahl, Craig/GVL Sent: Thursday, August 8, 2019 8:51 AM To: sprinklerforum@lists.firesprinkler.org Subject: [EXTERNAL] RE: 30' diameter and 30' high storage tank Spray nozzles are selected based on their angle of spray. So depending on the distance off the wall of the tank, the pressure and flow characteristics, you select your nozzle. Once you know what the area of coverage based on the above info will be for the nozzle, you can determine the horizontal spacing since there needs to be some overlap of the spray pattern in order to insure complete coverage of the tank surface. You do not want a ton of over spray nor do you want dry spots. There is no specific spacing rules as there are too many variables for anyone to make a blanket statement on spacing. As far as vertical, 12 ft. is subjective also. If there are appendages off the tank which could interrupt run-down or deflect the spray pattern, you might need to have them closer. In the vertical the spray impingement may not contact the tank wall 100% between nozzles but you have run-down that is taken into consideration to some extent. Check your email inbox. Craig Prahl | Jacobs | Group Lead/SME - Fire Protection | 864.676.5252 | craig.pr...@jacobs.com<mailto:craig.pr...@jacobs.com> | www.jacobs.com<https://urldefense.proofpoint.com/v2/url?u=http-3A__www.jacobs.com_&d=DwMFAg&c=wn3mZQLIuInh2ClcJ0_DIA&r=Z_2A85VL7AQzoqudh6uOyS3bn8etxB7nLN8OBJwQd9A&m=UlKWpTB5Cum9vJEFVDR00XnSSTmzOu0NITkY_43dMH4&s=P3PlyEfsimUF_KTKonkk8ZU6dRBpmWnfePtdqVVq3xY&e=> 1041 East Butler Road Greenville, South Carolina 29606 From: Sprinklerforum <sprinklerforum-boun...@lists.firesprinkler.org<mailto:sprinklerforum-boun...@lists.firesprinkler.org>> On Behalf Of Easter, Tim (Contractor) Sent: Thursday, August 8, 2019 11:34 AM To: sprinklerforum@lists.firesprinkler.org<mailto:sprinklerforum@lists.firesprinkler.org> Subject: [EXTERNAL] 30' diameter and 30' high storage tank How do you space nozzles horizontally on a 30' diameter flammable liquid storage tank? I know to space 12' vertically. My question is horizontally. Best, Timothy M. Easter ________________________________ NOTICE - This communication may contain confidential and privileged information that is for the sole use of the intended recipient. Any viewing, copying or distribution of, or reliance on this message by unintended recipients is strictly prohibited. If you have received this message in error, please notify us immediately by replying to the message and deleting it from your computer.
_______________________________________________ Sprinklerforum mailing list Sprinklerforum@lists.firesprinkler.org http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
