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

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

The DDX™ - Directional Drilling Kit is a high performance system designed to protect welded joints on PP, PE and FBE coated pipelines in directional drilling applications. This system offers unmatched installation simplicity while delivering exceptional protection at the joints during and after the tough conditions associated with HDD activities.

Layers of Protection

  • Force-cured epoxy is applied directly to steel for maximum corrosion protection
  • Primary sleeve composed of high shear strength adhesive and HDPE heat shrinkable backing provides both corrosion and mechanical protection across the joints.
  • The secondary sleeve provides additional mechanical protection to the leading edge of the primary sleeve during pull-through operations

Gouge and Abrasion Resistance

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

Performance Meets Productivity

  • Low preheat temperatures and straightforward application steps reduce cycle times and improve productivity
  • Simple and forgiving installation results in improved reliability and quality of every joint

Product Properties

Sleeve Operating Characteristics Test Method Typical Values
Pipeline Operating Temp.   Up to 70°C (158°F)
Minimum Installation Temp.   70°C (158°F)*
Main Line Coating Compatibility   PE, PP & FBE
Adhesive Properties
Softening Point ASTM E28 100°C
Lap Shear @ 23°C EN 12068 > 250 N/cm2
Lap Shear @ 60°C EN 12068 > 35 N/cm2
Backing Properties
Tensile Strength ASTM D638 22 MPa
Elongation ASTM D638 600%
Hardness ASTM D2240 55 Shore D
Volume Resistivity ASTM D257 1017 ohm-cm
Abrasion Resistance ASTM D4060 6 mg
Bursting Strength DIN 30672 > 2200N
Sleeve Properties
Adhesion Strength @ 23°C EN 12068 > 125 N/cm
Adhesion Strength @ 60°C EN 12068 > 15 N/cm
Impact Resistance EN 12068 > 30 J
Indentation Resistance EN 12068 Pass
Cathodic Disbondment @ 23°C, 28 days EN 12068 < 3 mm rad
Cathodic Disbondment @ 65°C, 48 hours EN 12068 < 3 mm rad
Microbiological Resistance ASTM G21 Pass
Soil Stress Resistance EN 489: 2009 Pass
Gouge Resistance CSA Z245.21 0.5 mm
Low Temp. Flexibility ASTM D2671-C > -32°C
Total System Thickness Supplied Typical Applied
Standard Product 2.8mm 3.0mm

* Indicated minimum installation temperature is for typical 3-layer systems. Please refer to the appropriate DDX install guide for the minimum installation temperature of a typical 2-layer system.

† Average gouge depth. Test method modified for field-applied 2-layer and 3-layer PE coating systems

Applications / Assets

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


Last Updated: 12/19/2017 11:40:55 AM
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