I'd like to know where I can find the 2020 updates of the NFPA 51B Standard for fire prevention during welding, cutting, and other hot work. Thanks.
• #### Thread How do I calculate the volume of foam required for gasoline and diesel Burial tank?    Horizontal cylindrical tank The diameter of the tank is 3.7 meters and its length is 15 metersHow do I calculate the volume of foam required for gasoline and diesel Burial tank?    Horizontal cylindrical tank The diameter of the tank is 3.7 meters and its length is 15 meters

Foam extinguishing system for underground tanks gasoline
• #### Thread Table 307.1 (1) "accumulatively"Table 307.1 (1) "accumulatively"

In table 307.1 (1) under flammable liquids storage, if both note "d" and "e" apply, does this mean that you can double the initial amount (120 gallons) to 240 gallons, and then double that amount (240 gallons) to 480 ...

Hello Xchange   I have a question regarding NFPA 407. If a loading and unloading rack for an exiting fuel farm is located outside the perimeter fence ( the tank still inside the plant). It is required to have a ...
• #### Thread Sulphur conveying systemSulphur conveying system

Hi I have been working in 1 project about conveying system for Sulphur in Sulphonation plant. I have been checking for some information about assessment due to combustible dust / flameable gas due to this work. I ...
• #### Thread NFPA 86 Exlosion Relief Requirement ExceptionsNFPA 86 Exlosion Relief Requirement Exceptions

Hello,  I am looking for information on how to take exception to NFPA 86 explosion relief requirements for Class A & B Natural Gas fired Ovens. My situation: I have an oven that cannot physically meet the 15 ...
• #### Thread NFPA 704 Multiple "Special Hazards"NFPA 704 Multiple "Special Hazards"

Hello all, What course of action should you take if all 3(three) "Special Hazards" are present in your building? I realize that if a substance is both an oxidizer and reactant to water you put -W-(lets pretend the li...
• #### Thread Subsurface Foam InjectionSubsurface Foam Injection

The SFPE Handbook and various vendors advise that subsurface injection of foam is not recommended for internal, floating roof tanks.  Are there any studies or incidents that support this position? Thanks

Hi,  I'm in a situation with a process that requires addition of powder to a 250L tank that contains ethanol. About 5 kg of powder is added, in 1kg batches. The issue I have is that the powders are weighed and di...
• #### Thread Gas Interface with HVACGas Interface with HVAC

Why there is nothing mentioned about the gas detector in return duct. While HVAC in re-circulation mode. if there is a build up or increase in hazard gas concentration inside the building due to infiltration or...
• #### Thread How to size the Explosion Reliving Device for Starch SiloesHow to size the Explosion Reliving Device for Starch Siloes

Hi, I would like to know the requirements and equations I need to use based on NFPA codes, to : 1) Size the Explosion relieving Devise , i.e., Explosion Panel or Explosion Hatch for Starch Siloes used in Pulp& Pap...
• #### Thread Can we calculate fire water requirements for a hydrocarbon well drilling site/rig site?Can we calculate fire water requirements for a hydrocarbon well drilling site/rig site?

Drilling rigs usually have their own fixed water spray system but how can we, as a client ensure that it is sufficiently designed? Secondly, is there a requirement of any additional firewater inventory to cool down th...
• #### Thread NFPA-30-Extract- Clarification requiredNFPA-30-Extract- Clarification required

NFPA-30 EXTRACT
• #### Thread What happened to NFPA 49?What happened to NFPA 49?

What happened to NFPA 49 - "Hazardous Chemicals Data?" I only see it in the current "Fire Protection Guide to Hazardous Materials, 2010 Edition." If it no longer exists, where can I find the data? For example, I want ...
• #### Thread Can anyone know how to arrange electricla containers?Can anyone know how to arrange electricla containers?

Hello, everyone! We have three substaitions and each substaion have mutiple electrical distributions stored in every container, now, we need to arrange the electrical containers in the ground plan, please see the atta...
• #### Thread Fire load and  Hazard Category of an occupancy/IndustryFire load and  Hazard Category of an occupancy/Industry

Kindly clarify exact relation between Fire load and Hazard category of  an occupancy/Industry (Light/Ordinary/High) in perspective of designing fire protection system of an industry.....
• #### Thread fm200 and inert gas systems discharge test (concentration test)fm200 and inert gas systems discharge test (concentration test)

is a discharge test  requested for the fm200 and inert gas system?