Silicone Calibration Products

Since the invention of CIPP around 50 years ago, Fenner Precision has supplied reusable silicone calibration products to the Trenchless Technology industry globally.  The No – Dig range includes :

  • Calibration Hose
  • T and Y Bladders
  • Top Hats
  • Liner Gun Bladders
  • Materials can also be supplied in flat sheet / roll form

The specially selected combination of advanced silicone rubbers, along with knitted polyester reinforcement fabric if required, allows the range to cater for all cure methods from light to steam, hot water to ambient.

The products offer a variety of benefits, creating a top quality liner finish while also saving contractors time and money ;

  • Expansion – With a diameter typically around 10% smaller than the host pipe, hoses / bladders are able to expand increasing wrinkle expulsion from the liner during curing thus providing optimum flow within the new pipe
  • Robustness – Reduced tear risk while remaining flexible enough for inversion and effective navigation of bends
  • Reusability – Non-stick silicone construction allows easy release from the liner enabling multiple use for cost saving and environmental advantages
  • High Temperature Resistance – Up to 200ºC / 392ºF for reduced cure times

These products are suitable for renewing and repairing the following types of worn or damaged pipes:

  • Lateral Pipes
  • Internal Pipes
  • Main Pipes
  • Potable Water Pipes
  • Chimney Flues
  • Oil and Gas Pipes

Download our leaflet for more information: >> Fenner Precision Pipe Rehab Leaflet <<

Silicone Calibration Hose

Calibration Hoses (also known as expansion or inversion bladders and inflation or cal tubes) are typically used in …

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Liner Gun Bladders

Silicone Liner Gun Bladders are engineered to enable the pipe rehab liners to be blown into the pipe, …

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Silicone Calibration Hose

Calibration Hoses (also known as expansion or inversion bladders and inflation or cal tubes) are typically used in conjunction with open ended liners within CIPP (Cured-In-Place Pipe) rehabilitation and repair processes.  Their function is to provide:

  • A pathway for the curing agent
  • Pressure against the inner wall of the liner during curing while it sets in place

Fenner Precision’s unique Calibration Hoses have been supplied to the No – Dig market since CIPP’s invention around 50 years ago, providing a reusable and high quality solution for pipe renewal and repair.

Typical Material and Physical Properties

  • Manufactured from a unique combination of silicone rubber and polyester fabric, products are precision-engineered to offer significant advantages over disposable products on the market.
  • Typically sized around 10% below the diameter of the damaged host pipe
  • Standard length range of 30m to 100m (100ft to 325ft)
  • Diameter range from 60mm to 915mm (2.4” to 36”)

Materials are selected depending on the cure method :

  • Red calibration hoses can be used with ambient, hot water and steam cure systems
  • Translucent calibration hoses can be used for all of the above cure systems, as well as light curing too.

Construction is chosen in order to suit the level of flexibility or robustness required for each individual application requirement :

  • Single Ply (nominal wall thickness 1mm / 0.04”)
  • 2 Ply (nominal wall thickness 2mm / 0.08”)

 

Although usually used in the renovation and repair of worn or damaged lateral and internal pipes, Fenner Precision’s Calibration Hoses can also be used for renewal of mainline sewer pipes, potable water pipes, oil and gas pipes, chimney flues and more.

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Value Adding Features

  • Highly durable over a wide temperature range (-40ºC to 200ºC / -40ºF to 392ºF)
  • Wall thickness of only 1mm / 2mm (0.04” / 0.08”) facilitates good heat transfer, fast cure times and flexibility (capable of being easily inverted), while still being robust enough to push out liner wrinkles
  • Excellent release properties allows easy withdrawal and multiple use for long term cost savings
  • Good chemical resistance
  • Excellent UV and ozone resistance
  • Materials can also be supplied in flat sheet / roll form
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Liner Gun Bladders

Silicone Liner Gun Bladders are engineered to enable the pipe rehab liners to be blown into the pipe, efficiently and reliably.

The design features cuffs at each end for easy, secure attachment via jubilee clips within the Liner Gun.

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Value Adding Features

  • Allows easy installation of pipe rehab liners
  • High strength silicone provides durable and reliable use time and time again
  • Custom sizes and thicknesses
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Connection Bladders

Connection Bladders are available in a range of sizes, materials, thicknesses and configurations, including T and Y shaped …

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Liner Gun Bladders

Silicone Liner Gun Bladders are engineered to enable the pipe rehab liners to be blown into the pipe, efficiently and reliably.

The design features cuffs at each end for easy, secure attachment via jubilee clips within the Liner Gun.

Related Case Studies

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Value Adding Features

  • Allows easy installation of pipe rehab liners
  • High strength silicone provides durable and reliable use time and time again
  • Custom sizes and thicknesses
Get in Touch

Connection Bladders

Connection Bladders are available in a range of sizes, materials, thicknesses and configurations, including T and Y shaped and Top Hat, to tackle virtually every type of connection or junction between main and lateral pipes.

T and Y Bladders 

T and Y Bladders are ideal for the repair of main to lateral pipe connections, manufactured on tools to meet the precise size requirements of different contractors, and specific trenchless repair challenges :

  • Advanced silicone formulations and specially selected reinforcement fabrics means Fenner Precision’s T and Y Bladders are tough but flexible, and reusable for long-term cost effectiveness
  • Red or translucent material
  • Single Ply or 2 Ply material construction
  • 90° and 45° connection angles
  • Lateral lengths of up to 100m / 325ft

Benefits include excellent expansion and flex properties, added durability, high temperature resistance, and maximum re-usability.

Lateral Renovation Top Hats 

Manufactured on tools using the same high quality silicone material as our calibration hose, Fenner Precision’s Top Hats are designed to offer maximum flexibility across different main / lateral connections :

  • Product is tailored to meet the specific connection size
  • Lateral lengths of up to 100m / 325ft
  • Red or translucent material
  • Single Ply or 2 Ply material construction
  • A flat main section enables the customer to cut-to-size as required.

Benefits include excellent expansion and flex properties, added durability, high temperature resistance, and maximum re-usability.

 

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