Subsea Tensioner Equipment
Hydraulic tensioning is the ideal method for tightening bolted connections. Hydraulic tensioning eliminates inaccuracies and helps achieve correct bolt loading in critical connections. At HTI, we’ve been building hydraulic tensioners and nuts since 1986.
What is a Subsea Bolt Tensioner?
HTI subsea hydrualic bolt tensioners allow divers to perform the tensioning process with tools designed specifically for their unique requirements. They have a minimum number of parts, extra long strokes, and can be easily positioned in poor visual conditions.
All standard HTI subsea tensioners are coated with protective finishes, and stainless alloys can be provided as an option.
How Do Subsea Bolt Tensioners Work?
Subsea bolt tensioners are used with an extra-long stud and pre-drilled nuts. The diver places the tensioners over the studs and secures them with the puller nuts. Next, they quickly connect the tensioners to the hose linked to a pump on the surface. After applying a pre-determined hydraulic pressure, the diver tightens the nuts by hand with a nut-adjusting socket.
With HTI’s long-stroke design (25mm) the studs are loaded quickly, usually after just one pressure cycle.
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Learn MoreCustom Engineered Tensioners Since 1986
HTI has been designing engineered solutions to your toughest bolt tensioning problems since 1986! You can choose from one of our standard catalog sizes above, or we can design a custom fixed tensioner for any application when a standard model won’t work. HTI tensioners can be designed for imperial or metric-sized studs, high loads, high temperatures, large stud sizes, or corrosive environments. Our multi-unit tensioning systems can make easy work of large bolted systems, and our automated tensioning systems can reduce labor and increase throughput in high-volume manufacturing applications.