Recommended practice for the classification of flammable liquids, gases, or vapors and of hazardous (classified) locations for electrical installations in chemical process areas : NFPA 497 - American National Standards Institute; National Fire Protection Association (Estados Unidos) (Quincy, Mass. : National Fire Protection Association, 2008)
Datos tomados de la hoja de presentación--"This edition of NFPA 497 was approved as an American National Standard on december 31, 2007"--"The 2008 edition is the culmination of a revision cycle that began with the document being entered into cycle in Junuary 2006"
Keywords: LIQUIDOS; FABRICAS DE PRODUCTOS QUIMICOS; INCENDIOS Y PREVENCION DEL FUEGO; ELECTRICIDAD; APARATOS E INSTRUMENTOS; INCENDIOS; NORMAS; GASES