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Advanced girth-weld protection for pipes used in directionally drilled applications

The TBK Directional Drilling system is specifically designed to protect welded joints on PE, FBE and HPCC coated pipelines in directional drilling applications.

In addition to providing effective protection against pull-through forces that occur during the directional drilling operation, Canusa’s TBK systems provide superior corrosion protection at pipeline weld joints. The product range includes TBK-65, TBK-80 and TBK-PE, which are each designed to meet specific application conditions and operating requirements.

Multi-Layers of Protection

  • Force-cured liquid epoxy applied to steel, if required, for maximum corrosion protection
  • Primary sleeve composed of high shear strength adhesive, a protective heat shrinkable backing, and a pre-attached closure patch
  • Sacrificial sleeve incorporated to protect the leading edge of the underlying primary sleeve during pull-through operation
  • Epoxy overcoat applied at the leading and trailing ends of the joint coating to provide additional protection to the system during directional drilling

Superior Gouge and Abrasion Resistance

  • Designed to mitigate the effect of forces associated with directional drilling
  • Highly resistant to the effect of soil stresses and pipe movements

Unique Adhesive Technology

  • Allows for lower installation pre-heat temperatures and superior bonding to mainline coating
  • Adhesive has been formulated to bond directly to the mainline coating; epoxy (if required) is applied to the steel only
  • Lower pre-heat temperature means less time heating resulting in application time and cost

Product Properties

Sleeve Operating Characteristics TBK-65 TBK-80 TBK-PE
Pipeline Operating Temp.** Up to 65°C (150°F) Up to 80°C (176°F) Up to 100°C (212°F)
Minimum Installation Temp. 90°C (195°F) 110°C (230°F) 130°C (266°F)
Mainline Coating Compatibility FBE, PE, PP, HPCC FBE, PE, HPCC FBE, PE, HPCC
Adhesive Properties Test Method Typical Values
Softening Point ASTM E28 94°C 124°C > 150°C
Lap Shear EN 12068 245 N/cm2 365 N/cm2 > 500 N/cm2
Backing Properties
Tensile Strength ASTM D638 24 MPa 22 MPa 22 MPa
Elongation ASTM D638 700% 600% 600%
Hardness ASTM D2240 50 Shore D > 55 Shore D > 55 Shore D
Volume Resistivity ASTM D257 1017 ohm-cm 1017 ohm-cm 1017 ohm-cm
Abrasion Resistance ASTM D1044 35 mg 30 mg 30 mg
Specific Gravity ASTM D792 0.93 0.94 0.94
Sleeve Properties
Adhesive Strength @ 23°C ISO 21809-3 > 70 N/cm > 50 N/cm > 200 N/cm
Impact Resistance ISO 21809-3 5 J/mm 5 J/mm 7 J/mm
Indentation Resistance*** ISO 21809-3 > 0.6 mm (at 60°C) > 1.0 mm (at 80°C) > 2.5 mm (at 80°C)
Cathodic Disbondment @ 23°C, 28 days**** ISO 21809-3 3 mm rad 3 mm rad 3 mm rad
Low Temp. Flexibility ASTM D2671-C > -32°C > -26°C > -26°C
* System can either be in 2-layer or 3-layer configuration
** Actual temperature rating is dependant on specific project requirements and conditions.
*** Residual Thickness. Test performed on 2.6 mm standard thickness sleeve as supplied.
**** As a 3-layer system

Applications / Assets

  • Gas Pipelines
  • Girth-Weld Joints
  • Oil Pipelines
  • Waterworks Pipelines


Last Updated: 12/18/2017 3:42:33 PM
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