Young engineer holding helmet safety and blueprints working with gas boiler of heating system equipment in a boiler room Worker repairing the boiler with the aid of welding Valve refinery plant equipment for pipeline oil and gas valves at gas plant pressure safety valve selection. Refinery plant equipment for pipe line oil and gas valves at gas plant pressure safety valve selective Air cooled water chiller with pipework Drum for generator steam of HRSG boilers systems (Heat recovery steam generator) during construction in Combined-Cycle Co-Generation Power Plant. Drum for generator steam of HRSG boilers systems (Heat recovery steam generator) during construction in Combined-Cycle Co-Generation Power Plant. Piles of stainless steel flanges Drum for generator steam of HRSG boilers systems (Heat recovery steam generator) during construction in Combined-Cycle Co-Generation Power Plant. refrigerating unit for realization chilled water in an industry