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Subsea Bolt Tensioners

Subsea Bolt Tensioners

Specially for application as Subsea flange connections and Subsea clamps we have PSS Series Bolt Tensioners. These Tensioners are suitable for higher pressure rating flanges also. This is an ergonomic design, which is very easy to handle and use under the harsh sea conditions. This tool is an assembly of two basic parts a Tensioning Unit and Puller.

Features of prime subsea bolt tensioners

  • This Complete tool has been made from high strength stainless steel which is suitable in corrosive sea environment and to minimize maintenance.
  • These Tools are designed to provide a wide range of flexibility, and cover for stud sizes 3/4” to 3.1/2” (M-20 to M-85)..
  • This Tool generates higher load which is suitable for higher pressure rating flanges.
  • These tensioners have a 25mm long stroke with indication mark to avoid over stroke limit.
  • Tools release high pressure hydraulic oil inwards when over-stroke, so that it save operator from any potential exposure.
  • For Multi tensioning applications the provision of two connections ( Manifold) has been done.
  • This tool is assembled with Anti Roll, Composite Material seals for longer life and high reliability. These seals have a low coefficient of friction so that the piston can be returned to a closed position with minimal effort.
  • On customer request we can provide this tool with machined PU (poly urethane) seals..On customer request we can provide this tool with machined PU (poly urethane) seals..
  • As a Optional Split Nut available for fast and easy fitment which ensures most efficient use of expensive diver time.
  • This Tool is having detachable hooks and strap for easy handling under water.
  • Knurled and formed surface of this tool allows easy handling.
  • Fluorescent band is available on load cell body for easy tool identification.

How It Works

Positioning Icon

Installation

Install the tensioner to the subsea bolt by using ROV or divers.

Hydraulic Loading Icon

Hydraulic Operation

The hydraulic pressure stretches the bolt under the water.

Pressure Release Icon

Nut Tightening

Tight the nut by keeping the bolt tight.

Nut Tightening Icon

Seal & Release

Release the pressure and ensure a safe, leak-proof connection.

Frequently Asked Questions

What is a subsea bolt tensioner?

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A subsea bolt tensioner is a kind of hydraulic tool that is specifically used for underwater applications.

How are the subsea bolt tensioners different from standard tensioners?

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Subsea bolt tensioners are particularly designed to withstand high-pressure, corrosive underwater conditions that makes it different from standard tensioners.

What kind of industries use subsea bolt tensioners?

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These tensioners are commonly used in the oil and gas industry, offshore wind farms, marine engineering, and other underwater construction.

How do I choose the right subsea bolt tensioner for my project?

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While choosing the best tensioner, you should consider many factors such as bolt size, required tension load, depth of operation, and environmental factors.

What maintenance is required for subsea bolt tensioners?

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Regular maintenance like cleaning and drying after use, inspecting seals and hoses for damage, and ensuring all components are free from corrosion are required.