Fill completely with water; then connect a high-pressure nitrogen cylinder and quickly jack the system to 200 psi. Have seen this method used before to test large warehouse systems where it is very time consuming to pressurize the system(s).
This information is provided as a courtesy only. Design and installation requirements for fire protection systems must be independently evaluated by qualified design professionals and approved by all authorities having jurisdiction. Cary Webber CFPS Director, Technical Services Reliable Automatic Sprinkler Co., Inc. 1470 Smith Grove Road, Liberty, SC 29657 Tel: 864-843-5161 -----Original Message----- From: Sprinklerforum <[email protected]> On Behalf Of Tom Duross via Sprinklerforum Sent: Thursday, April 15, 2021 6:59 PM To: [email protected] Cc: Tom Duross <[email protected]> Subject: Standpipe Testing CAUTION: This email originated from outside of the organization. Do not click links or open attachments unless you can confirm the sender and know the content is safe. I'm wondering if anyone here on the list can help me with some estimates. I have 3 elevated roadway standpipes to pressure test and flow test. All set with the flow testing part. My question is pressure testing. Never did this part before. I can use the public hydrants to fill to street pressure. No problem. Static on grade is about 75# as I have a couple of pumps in the area I test annually. Standpipes are about 50' above. I need to figure out if I need to rent a pump capable of reaching 200+ psi or how long will these 2 little ½ and ¾ hp hydro pumps I have will take. This is all witnessed and the plan is hydro for 2 hours, walk and check everything, drain completely, hook up the pumper and pull the trigger. Can't make the fire guy stand there for 2 hours while the little pump hits 200 plus 50 feet. If I took each of the standpipes, calculated their volume (close to a mile in total), figured in all the expansion joints, pipe to the double wye's, air vents, low point drains, dual FDC's, etc., and came up volume. Use fire hose to reach static. I take my little pumps at 4 or 6 gpm, decreases as pressure grows obviously, I need to figure how long these will take to reach 200-225#. Thinking hours. So maybe I need to look into rentals but I need to know what size I need. Ideas? TD _______________________________________________ Sprinklerforum mailing list [email protected]<mailto:[email protected]> https://nam12.safelinks.protection.outlook.com/?url=http%3A%2F%2Flists.firesprinkler.org%2Flistinfo.cgi%2Fsprinklerforum-firesprinkler.org&data=04%7C01%7Ccwebber%40reliablesprinkler.com%7Cb04786256ce84af2331908d9006213d0%7C361f92efbca442cdaf0d8099acee2244%7C0%7C0%7C637541243514932628%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=Aocxodu2%2BJTWSNVMGv1oYTfxkRJbfSHxNqQ0Dgm306s%3D&reserved=0 _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
