In a wet pipe fire sprinkler system that is inerted with nitrogen, the nitrogen pressure typically needs to be above the minimum pressure of the water in the system to ensure an effective blanket of nitrogen gas over the water column. Generally, a nitrogen pressure between 5-10 psi above the normal water pressure is recommended to provide adequate inerting. This is commonly around 30-40 psi of nitrogen pressure, though it can vary depending on the specifics of the system. The goal of nitrogen inerting in wet pipe systems is to displace oxygen, which helps prevent corrosion within the piping. The specific pressure needed can vary depending on system requirements and local codes, so consulting with NFPA 13 or a qualified fire protection engineer is recommended for precise guidelines.
From: Tim Easter <[email protected]> Sent: Tuesday, October 29, 2024 1:22 PM To: Discussion list on issues relating to automatic fire sprinklers <[email protected]> Subject: [Sprinklerforum] Help with nitrogen pressure You don't often get email from [email protected]<mailto:[email protected]>. Learn why this is important<https://aka.ms/LearnAboutSenderIdentification> ! External Email, Use Caution ! If a wet pipe system is inerted with nitrogen what does nitrogen pressure need to be? Thanks ________________________________ Confidentiality & Disclaimer Note: This e-mail (including any attachments) contain protected and confidential information intended for the sole use of the individual or organization addressee. If you are not the addressee or an authorized agent acting on their behalf, or if you have received this message by error, please notify the sender immediately be returning the message. It must not be copied, distributed or used in any other way but should be immediately deleted from your system. While Dar and the Dar Group strive to maintain high standards of communication, reliability, authenticity and integrity, neither shall be liable for the improper or incomplete transmission of the information contained in this communication nor for any delay in its receipt or damage to your system. Neither Dar nor the Dar Group guarantees that the integrity of this communication has been maintained or that this communication is free of viruses, interceptions or interference. Confidentiality & Disclaimer Note: This e-mail (including any attachments) contain protected and confidential information intended for the sole use of the individual or organization addressee. If you are not the addressee or an authorized agent acting on their behalf, or if you have received this message by error, please notify the sender immediately be returning the message. It must not be copied, distributed or used in any other way but should be immediately deleted from your system. While Dar and the Dar Group strive to maintain high standards of communication, reliability, authenticity and integrity, neither shall be liable for the improper or incomplete transmission of the information contained in this communication nor for any delay in its receipt or damage to your system. Neither Dar nor the Dar Group guarantees that the integrity of this communication has been maintained or that this communication is free of viruses, interceptions or interference.
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