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"Pumping systems account for nearly 20% of the world’s energy used by electric motors and 25% to 50% of the total electrical energy usage in certain industrial facilities." - DOE statistic (Note: Make that 99.99% for pipeline companies)
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"Pumping systems account for nearly 20% of the world’s energy used by electric motors and 25% to 50% of the total electrical energy usage in certain industrial facilities." - DOE statistic (Note: Make that 99.99% for pipeline companies)
Determine whether the requirements for the electrical classification apply NFPA 70 (the US National Electrical Code), CSA, European standards, etc. This is largely related to the location of the plant site and operating company requirements.
Determine the material specification for the particular grade of diesel to obtain the flash point specification. For example the flash point for marine Diesel may be different than non road diesel. In the US several ASTM standards may apply. When you mention HSD I assume that you refer to high sulfur diesel such as Number 2 D S5000. Refering to ASTM D 975 it appears that the minimum flash point is 52 degree C. However, a reference is made to blending with Number 1 fuel oil in the winter months or cold climates. Number 1 D S5000 has a minimum flash point of 38 degree C. ASTM D 975 us just one of several fuel oil specification standards. Similar flash point values exist in ASTM D 396. ASTM D 6985 may have different flash points such as 60 degree C for military applications. BTW, my copy of these standards may not be current.
NFPA 30 defines combustible liquids and flammable liquids. A combustible liquid has a closed-cup (one of the testing techniques also defined by ASTM standards) flash point at or above 37.8 degree C. Flammable liquids have a flash point below 37.8 degree C and Reid vapor pressure below 40 psia at 37.8 degree C per ASTM D 323. Within the US categories your Diesel may be a Class II liquid. This is a step toward the NEC group but not the same. The European system is different.
Once you identify which set of standards and the flash point of the diesel of interest you can determine which if any hazardous area may apply. Regardless of the requirements, some may use judgement to consider Class I Division 2 Group D as a minimum requirement.
