I wasn't able to find specific information on the National Fire Protection Association (NFPA) guidelines and regulations for the maximum travel distance and spacing requirements for portable fire extinguishers in industrial occupancies in our current safety knowledge base, but here are industry-standard safety guidelines:

In industrial settings, fire extinguisher placement is determined by the type of fire hazards, with specific distance requirements based on the fire's classification. For Class A fires, which involve ordinary combustible materials, extinguishers should be placed so that travel distance for employees to any extinguisher is 75 feet or less. For Class B fires, which involve flammable liquids or gases, the maximum travel distance is reduced to 50 feet from the hazard area to the extinguisher. Class C fire extinguisher placement should be based on the existing Class A or B hazards. For Class D fires, concerning combustible metals, extinguishers or other extinguishing agents should be located within 75 feet of the working area.

To ensure fire extinguishers are accessible, they should be mounted, located, and identified so that employees can easily reach them without risk of injury. In areas where obstructions cannot be avoided, signs or color symbols should indicate the extinguisher's location.