NFPA 37-2018 PDF Download

NFPA 37-2018 is a standard that sets guidelines for the installation and use of stationary combustion engines and gas turbines. It focuses on ensuring safe engine operation and minimizing fire hazards. This standard applies to engines and turbines fueled by liquid or gaseous fuels, which are used as prime movers for various systems such as emergency generators, fire pumps, and stand-by and peak power systems.

The standard covers a wide range of requirements including system installation, fuel supplies, lubricating systems, engine exhaust systems, control and instrumentation, instructions, and fire protection features. It is important for designers, installers, and Authorities Having Jurisdiction (AHJs) to comply with this standard in order to ensure efficient and confident work.

The 2018 edition of NFPA 37 introduces several changes and updates. Some of the key changes include the addition of new definitions for terms such as inlet gas pressure, line pressure regulator, and overpressure protection device. It also mandates investigation of any situation that results in a trip of the high-pressure limit control prior to manual reset. The allowable operating time for automatic safety shutoff valves (ASSVs) has been extended from 1 second to 2 seconds. The standard now also provides overpressure protection for gas trains that operate between 2 psi and 125 psi, which were previously not addressed.

Other revisions and additions include clarification of provisions related to engines located on roofs, guidelines for proper anchoring of flexible connectors, and addressing the concerns of products of combustion, especially carbon monoxide, from the exhaust of stationary engines. Additionally, detailed annex material now discusses the "lock-up" of pressure regulators.