My old Fire stick tells me, 2" copper tubing @ 324 GPM using C=150 loses around .66 PSI/foot @ 31 ft/sec. Is that 324 GPM with or without hose streams?
[cid:[email protected]] From: [email protected] <[email protected]> Sent: Friday, January 6, 2023 10:00 AM To: 'Discussion list on issues relating to automatic fire sprinklers' <[email protected]> Subject: [Sprinklerforum] Re: 2" Underground Brian, Was the 324 GPM @ 46 PSI at the base of the riser? You will want to push for 4" Class 52 Ductile Iron. At a 100' the pressure drop will be 29 PSI. Regards, G. Tim Stone AutoSPRINK 2020, 16.3.28.0 Xi Powergo XT Intel Core i7-8700k CPU@ 3.70GHz Windows 10 Pro; 64 Bit G. Tim Stone Consulting, LLC NICET Level III Engineering Technician Fire Protection Sprinkler Design and Consulting Services 117 Old Stage Rd. - Essex Jct., VT. 05452 CELL: (802) 373-0638 [email protected]<mailto:[email protected]> From: Brian Harris <[email protected]<mailto:[email protected]>> Sent: Friday, January 6, 2023 10:39 AM To: Discussion list on issues relating to automatic fire sprinklers <[email protected]<mailto:[email protected]>> Subject: [Sprinklerforum] Re: 2" Underground Tim- Yikes!! I'm working on getting that info now. Thank you. Brian Harris, CET BVS Systems Inc. bvssytemsinc.com<https://nam02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fbvssystemsinc.com%2F&data=05%7C01%7Cdwilson%40blackhawksprinklers.com%7C9ce9f54b5305463e4ab508daefff3f43%7C20b3eafa18334148b9c58e75b45c105a%7C0%7C0%7C638086177115879679%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=dyJdZXWuZI1wXQq9kJYqZcy4NdptypKG6poq%2FEP7Dtw%3D&reserved=0> From: [email protected]<mailto:[email protected]> <[email protected]<mailto:[email protected]>> Sent: Friday, January 06, 2023 10:29 AM To: 'Discussion list on issues relating to automatic fire sprinklers' <[email protected]<mailto:[email protected]>> Subject: [Sprinklerforum] Re: 2" Underground Brian, We need a little mor information about the Underground. I ran a Calculation based on 100' of 2" Type M Copper flowing 324 GPM. This created 88 PSI pressure loss. Regards, G. Tim Stone AutoSPRINK 2020, 16.3.28.0 Xi Powergo XT Intel Core i7-8700k CPU@ 3.70GHz Windows 10 Pro; 64 Bit G. Tim Stone Consulting, LLC NICET Level III Engineering Technician Fire Protection Sprinkler Design and Consulting Services 117 Old Stage Rd. - Essex Jct., VT. 05452 CELL: (802) 373-0638 [email protected]<mailto:[email protected]> From: Brian Harris <[email protected]<mailto:[email protected]>> Sent: Friday, January 6, 2023 8:46 AM To: [email protected]<mailto:[email protected]> Subject: [Sprinklerforum] 2" Underground Been asked to verify a 2" underground supply will work for a NFPA-13 Dry system for a small Patio/Bar. Water supply is good, S=114 / R=106 / F=1556. Preliminary numbers I've ran show a system demand of 324gpm @ 46psi. That's assuming a 10psi loss for underground pipe (BFP is 10 as well), the loss for 2" underground is the part I'm not real comfortable about. Any thoughts? Brian Harris, CET BVS Systems Inc. Design Manager bvssystemsinc.com<https://nam02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fbvssystemsinc.com%2F&data=05%7C01%7Cdwilson%40blackhawksprinklers.com%7C9ce9f54b5305463e4ab508daefff3f43%7C20b3eafa18334148b9c58e75b45c105a%7C0%7C0%7C638086177115879679%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=dyJdZXWuZI1wXQq9kJYqZcy4NdptypKG6poq%2FEP7Dtw%3D&reserved=0> Phone: 704.896.9989 Fax: 704.896.1935
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