In Spain, the operation of industrial equipment is strictly regulated by the Pressure Equipment Regulations (REP). Due to the thermal outputs and steam production capacities reached by the Attsu HHE fire-tube steam boiler, ranging from 2,000 to 50,000 kg/h, this equipment is generally classified as Class Two. This means that, by law, the company must have a staff member who holds an Industrial Boiler Operator licence.
This requirement ensures that the responsible personnel understand not only the low-NOx combustion of the burner, but also the safe management of the medium- or low-voltage electrical section of the hybrid model. In addition to the presence of the operator, this fire-tube steam boiler must undergo official periodic inspections, levels A, B and C, carried out by an Authorised Inspection Body (OCA). Compliance with these legal requirements is not only a regulatory obligation, but also a safety guarantee for the plant, ensuring that the control and safety devices, such as the management PLC, operate correctly under any load condition.