7
Oil and petrochemical storage tank cleaning equipment, namely tank cleaning nozzles, single nozzle sweepers, centrifugal suction, booster pumps, filters, skimming tank, auxiliary containers, coalescer, electrical cabinets, power cabinets, heat exchanger, inert gas generators, nitrogen/oxygen generators, distribution header, piping, cold-tapping equipment for cutting holes in tank roofs without generating excessive heat, gas sensors, electric generator, air compressor, hydrocyclones, high-speed centrifuges, decanters, all sold together as a unit; equipment for the separation of sludge, processing and recovery of oil from oil and petrochemical storage tanks, slop tanks and other reservoirs containing oil, chemicals or petrochemicals, namely, nozzles, decanters, high-speed separators and centrifuges, all sold together as a unit
11
Equipment for the separation of sludge, processing and recovery of oil from oil and petrochemical storage tanks, slop oil tanks and other reservoirs containing oil, chemicals or petrochemicals, namely, oil purifying installations and used oil recovery units
37
Cleaning of oil and petrochemical tanks
40
Treatment and processing of oil, petrochemicals and oily sludge, namely separation and recovery of oil from slop oil ponds, sludge in oil tanks and other reservoirs containing oil, chemicals or petrochemicals