When developing your infrastructure projects, you need partners you can count on for specifications and all kinds of certifications. Douce Hydro has the largest design and manufacturing capability worldwide for custom cylinders. Understanding the speed in which businesses require results, Douce Hydro has the efficiency to provide fast and reliable quotes and drawings for expedited delivery. Douce Hydro has a strong presence in Energy, Marine, Military, Primary Metal and Smelters Plants with internally required certificates of conformance on many standards.