PNNL 13277

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Legend 1. Component or OEM manufacturing and system integration: relevant standards from ANSI, ASHRAE, ASME, ASTM, EGSA, IEEE, NEMA, UL 2. NFPA 37, sections 8-4.1-2, combustion gas turbines must be installed with (1) an automatic main speed control and overspeed shutdown control, (2) a backup overspeed shutdown control independent from #1, (3) automatic engine shutdown device for low lubricating oil-pressure (exempt when unit is constantly attended), (4) remote engine shutdown capability, (5) remote lubricating oil pump shutdown capability, (6) remote shutdown capability for high exhaust temperatures, and (7) automatic fuel shutoff during a flameout. Additionally, the turbine starting sequence “shall include a purge cycle that produces a nonflammable atmosphere in the turbine and exhaust system prior to introduction of the fuel.” (section 8-4.2) 3. NFPA 37, section 4-4.3, unattended engines shall have both a zero governor-type regulator installed AND an auxiliary shutoff valve installed ahead of any flexible connector to other controls. 4. NFPA 37, sections 6-2.1-4, requirements for gas turbines utilizing an oil lubrication system. 5. All fuel gas systems utilizing service pressures under 125 psig must be installed and operated in accordance with NFPA 54, the National Fuel Gas Code. Fuel piping must be steel or other metal, and in compliance with NFPA 30, Flammable and Combustible Liquids Code. Piping protection is outlined in MSS SP-69, Pipe Hangers & Supports - Selection and Application. 6. All pressure-boosting equipment must be certified (by stamp) for design, construction and testing according to ASME Boiler and Pressure Vessel Code, Section VIII, Division I. 7. NFPA 37, section 3-5.3.1-3, all wiring and batteries must be protected from arcing and shorting. Note: all wires, with the exception of ignition or microprocessor wiring and thermocouples, must be stranded annealed copper. 8. Enclosure - although NFPA 37 does not specifically address enclosures, the local building inspector will probably require (1) the cabinet to meet NEMA standards for explosion-proof enclosures, and (2) the integrated unit (prime mover, generator, pipes and wires and all controls & valves) to be protected from natural elements (wind, sun, precipitation, detritus) and vehicular impact. 9. NFPA 37, section 3-1.4.1 (outdoor installations): unit must be a minimum of 5 ft. from any combustible walls and bldg. openings. Also NFPA 37 section 3-2, foundation to be made of non-combustible materials. 10. NFPA 37, section 3-1.3.1, same minimum space (5 ft.) and foundation requirements as outdoor installations. 11. ASHRAE Handbook -- Fundamentals (1993) is recommended reference for design of exhaust air discharge system. 12. All LP gas systems (liquid or vapor phase) must be installed in accordance with NFPA 58, Standard for the Storage and Handling of Liquid Petroleum Gases. The Flammable and Combustible Liquids Code, API (American Petroleum Institute) 620, Design and Construction of Large Welded Low-pressure Storage Tanks, may also apply. 13. Grid Interconnection (standard currently under development by IEEE SC 21, Richard DeBlasio, chair) 14. Local zoning ordinances (definition of hazardous materials and relation to residential zones, distance to property line and rights-of-way, access by local fire and safety authorities, etc) may need to be consulted in some areas. 15. Fire Protection - Local building inspectors will require a fire risk evaluation be performed for each installation with respect to design, layout, and operating conditions of the unit. From that analysis the inspector may require any or several of a variety of fire protection systems (portable vs. fixed systems, foam or gaseous extinguishers, automatic sprinklers or dry chemical fire suppression systems). 5.2

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