NFPA 1561: Standard on Emergency Services Incident Management System Depending upon type of incident, there may be specific requirements for ICS, including: NFPA 471: Recommended Practice for Responding to Hazardous Materials Incidents NFPA 475: Recommended Practice for Responding to Hazardous Materials Incidents/Weapons of Mass Destruction NFPA 1143: Standard for Wildland Fire Management Referenced staff qualifications are found in NFPA 1026: Standard for Incident Management Personnel Professional Qualifications or other standards for staff qualifications for specific types of incidents.
Yes, plumbers working on fire suppression systems need to follow NFPA 25 as well as any other applicable NFPA and local standards (e.g., NFPA 13 for sprinkler systems, NFPA 14 for standpipes, NFPA 54 Fuel Gas Code, etc). Specialized plumbers also deal with specific standards for hazardous materials piping, according to the types of materials and the types of facilities in which they're found.
Blue. Yellow is reactivity, red is fire.
3 (yellow marking)
The number 4 on the NFPA 704 placard indicates the highest hazard in any of the three categories (health, fire, reactivity).
The NFPA 704 diamond is a ring of smaller diamonds that are blue, red, yellow and white. A number or symbol in each section indicates the relative danger.
The NPFA mark is used for materials that can ignite.
By thr NFPA and local codes
There are hundreds of NFPA codes. A list can be found at the NFPA website.
There are two unrelated hazard classification systems that have categories called "Class 2 Division 2" One is the NFPA system for designating explosive environments. The other is the DOT system for classifying materials that are hazardous in transportation. In the NFPA system for explosive environments, Class 2 locations are hazardous because of the presence of combustible (explosive) dust. Class 2, Division 2 locations are places in which combustible dusts will not normally be in suspension in the air, or will not be likely to be thrown into suspension by the normal operation of equipment or apparatus, in quantities sufficient to produce explosive or ignitable mixtures, but where accumulations of dust may be sufficient to interfere with the safe dissipation of heat from electrical equipment or apparatus, or where accumulations of dust on, in, or in the vicinity of electrical equipment might be ignited by arcs, sparks, or burning material from such equipment In the DOT system for hazardous materials in transportation, Class 2 is for compressed and poisonous gases. Class 2, Division 2 (also called Division 2.2 ) is for non-flammable compressed gases.
A "4" in the blue quadrant of NFPA 704 indicates that the substance is known to be highly hazardous to an individual's health. The scale runs from 0 to 4 with 0 being essentially harmless and 4 being extremely harmful or potentially fatal. The number 4 means it is too dangerous to enter the liquid or vapor, as compared with number 3, which means you can work with it if you are fully protected.