The steam boiler on gas fuel Industrial background from part of valves for power, oil or gas industry Industrial background from part of valves for power, oil or gas industry T-joint coppers, Joint coppers in the box.Accessory of refrigeration piping system Drum for generator steam of HRSG boilers systems (Heat recovery steam generator) during construction in Combined-Cycle Co-Generation Power Plant. Gas boilers in gas boiler room for steam production 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.