Since this is a flammable liquids issue NFPA 30 sets the classification areas and NFPA 70 (National Electrical Code) tells you how to install equipment to meet these issues. There is not a lot of information on issues like metal to metal contact. Perhaps NFPA 77 on static might be of some...
You are confusing the maximum area of coverage for a sprinkler system with the area of demand. The water demand is based on the area of demand and the density curve for the particular hazard. The maximum area of coverage of a sprinkler system is 52,000 sq ft for light or ordinary and 40,000 sq...
The area of demand is decided by two things, separation as mentioned by a previous reply and by type of hazard. These hazards are typically Light, Ordinary, Extra hazard, rack storage or a specialized occupancy such as rubber tires, flammable liquids etc. When you have select the occupancy...
The 20 fps is no longer used even by most insurance companies. As mentioned in am=nother reply it was formerly in the NFPA 13 handbook for guidance. It is now felt that the friction loss in the pipe is a better design guideline. However, if you get too much over 20 fps you will find that you...
The amount of leakage from your system is something that you have to monitor. These can vary widely depending on the amount of pipe the type of joints and the installation. The jockey pump is a small pump just used to maintain a resonably constant system pressure by running on an intermittent...
You need to use the highest fire protection system water demand and multiply it time the duration required for your type of occupancy. You can subtract the fill rate from the public if the public system is reliable and you have an automatic fill valve and no the fill rate. For example if your...
A liquid with a flashpoint of 70 degrees C is a Class IIIA liquid. See NFPA 30 - 2000 Chapter 6, for distances from vapor sources to different types of electrics.
As long as you have the appropriate lenghts of pipe on the suction and discharge side of the pump to avoid turbulent flow the flow meter and discharge can be returned to the suction tank.
