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Prevent leaks in pipe flanges using HTL’s Flange Pullers    

Prevent leaks in pipe flanges

It is consistently heard across industry that 100% leak free joints are the desired outcome when working on flange joints. In the quest to eliminate leaks in piping and pressure vessel systems a “Zero Leakage” result is the number one priority.

To achieve this, it is necessary to understand what causes leaks; what must be taken into account is the type of joints where leaks commonly occur and also analysis on the ‘proper’ use of equipment traditionally used to prevent leaks.

Realisation of the facts:                          

  • There are always several mechanisms which can contribute to a leak. Looking at a single contributing factor is too narrow and may lead to missing other contributing factors.
  • Within pressurised systems, joints are highly dynamic and constantly moving due to the changes occurring in the environment. This variable can create the difference between tight and leaking joints.
  • There is no such thing as a perfect, 100%, leak free joint. There will always be some leakage if we look at it on a molecular level. The success in controlling leaks comes from choosing the best combination of gaskets and the assembly of the flange.

There are many benefits to be gained when proper installation processes are carried out, see below:

  • The process of positioning the flanges has important principles to be considered which assist in preventing a leak free joint.
  • The flange faces are to be brought together evenly to allow uniform distribution of the load on the gasket. However, some methods can still cause damage to gaskets; ramming flanges, a practice used in assembling heat exchanger bundles, is a common cause of damage. A safe and secure method can be carried out by using HTL’s Hydraulic Flange Pullers to allow the flanges to be gradually drawn together ensuring zero damage.

The solution:

HTL’s Flange Pulling Tool is a simple, lightweight hydraulic tool deigned to be used to pull two flanges together prior to bolting. With the ability to pull flanges securely and safely from a distance of 600.00mm to 0.0mm and with a force of 200Kn (20T), you can be assured that HTL have the correct equipment to assist in securing the desired jointed, leak free flange.

When greater force is required, the HTL Flange Pulling Tool can be used simultaneously to ensure all flanges, varying in sizes maintain the high standards required. This can help you save money on repairs and man hours whilst also satisfying health and safety departments by providing a safe and secure working environment.

Using HTL’s Flange Puller will:

  • Reduce operator fatigue
  • Reduce pinch points
  • Enable quick and easy set up and use
  • Ensure highly controllable and safe use
  • Reduce gasket damage

Discover how HTL’s Flange Pullers can help you cut costs today. For daily hire rates or purchase options call +44 (0)1670 700 003 or email info@hiretorque.com / info@htl-australasia.com.

 

Read ‘The Importance of joint Integrity’ for the typical damages caused to flanges and gaskets.

https://www.linkedin.com/pulse/importance-joint-integrity-georgie-arnold?trk=mp-author-card


2 responses to “Prevent leaks in pipe flanges”

  1. Ross Harper says:

    These look something like bolt tensioning tools.
    What is the difference and what bolt sizes are these for?
    Do they bring the whole flange set together so that multiple bolts can be tightened at a time or are they single bolt only?
    How much time do these take to finish the joint versus standard power torque wrenches and traditional bolt tensioners?

  2. Georgie Arnold says:

    Hi Ross,

    Thank you for the question.

    Once both flanges have been pulled together, the bolts can then be inserted through the bolt holes and the tightening can begin in the normal conventional way of either utilizing Torque Wrenches or Bolt Tensioners.

    The Flange Pulling Tool has been designed utilizing tandem hydraulic cylinders to create a very low profile, this allows the Puller to be used on small diameter flanges with limited access as well as larger flanges. The tool can be used on any flange with a bolt hole diameter of 22mm (7/8”) or greater, and can pull from a distance of 600mm down to 0 mm with a force of 10T (100kN) per tool. It is recommended that 2 tools are used as a minimum but the Flange Pulling Tool can be used in greater multiples to achieve the pulling force required.

    I hope this makes sense Ross, they are a pulling tools rather than a bolt tightening tool.

    Regards,
    Georgie

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Ross Harper says:

These look something like bolt tensioning tools.
What is the difference and what bolt sizes are these for?
Do they bring the whole flange set together so that multiple bolts can be tightened at a time or are they single bolt only?
How much time do these take to finish the joint versus standard power torque wrenches and traditional bolt tensioners?

Georgie Arnold says:

Hi Ross,

Thank you for the question.

Once both flanges have been pulled together, the bolts can then be inserted through the bolt holes and the tightening can begin in the normal conventional way of either utilizing Torque Wrenches or Bolt Tensioners.

The Flange Pulling Tool has been designed utilizing tandem hydraulic cylinders to create a very low profile, this allows the Puller to be used on small diameter flanges with limited access as well as larger flanges. The tool can be used on any flange with a bolt hole diameter of 22mm (7/8”) or greater, and can pull from a distance of 600mm down to 0 mm with a force of 10T (100kN) per tool. It is recommended that 2 tools are used as a minimum but the Flange Pulling Tool can be used in greater multiples to achieve the pulling force required.

I hope this makes sense Ross, they are a pulling tools rather than a bolt tightening tool.

Regards,
Georgie

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