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Rock Jacket®

Wrap Applied Bendable Concrete Coating

Rock Jacket® is a system that was developed to offer excellent mechanical protection to the anti-corrosion coating and the steel pipe of onshore pipelines with the lowest total installed cost, installation time and environmental impact in the industry. Rock Jacket® is a plant applied reinforced concrete pipe coating developed for rocky terrain, rough terrain configurations such as steep slopes and for road and river crossings. It has been designed to be buried directly in blasted out rock trenches without the use of other costly protective products and is ideal for both small and large diameter pipelines.

  • The only mechanical protection system in the industry that offers excellent protection to the anti-corrosion coating and the steel pipe from mechanical damage during pipe handling, transportation, field stringing, bending, backfilling and in-service use
  • Fully compatible with the most widely used anti-corrosion coatings in the market
  • The only mechanical protection system in the industry that has no limitations in terms of terrain configuration, trench material type and climate
  • Bendable to the requirements of all standard construction specifications without any non-standard equipment or additional effort on the contractor’s side other than the use of oversized shoes and die on the bending machines for large diameters
  • Can be directly buried in blasted out rock trenches, lowering the total installed cost of protecting the pipeline against mechanical damage compared to the use of more expensive protective systems such as sand padding backfill, mechanical padding or field applied rock shield
  • Reduces the costs associated with buying or renting additional equipment, with surplus rock removal and right-of-way costs as it does not need additional trench depth and width
  • Available from fixed coating facilities as well as from portable Rock Jacket coating plants that can be mobilized in a short period of time to increase local content and minimize pipe handling and transportation costs

To purchase the Rock Jacket® product, please call 281-886-2374.

Product Properties

Penetration resistance 50% MAX @ 15kN
Minimum impact resistance 450 J (330 ft/lbs)
Bendability 1.5° per pipe diameter*
Minimum compressive strength (28 days) 20 MPa (3000 psi)**
Density 2243 kg/m3 (140 lbs/ft3)†
Concrete thickness 25 mm (1”)
Minimum pipe diameter 90 mm (3.5”)
Maximum pipe diameter 1067 mm+ (42”+)††
Minimum pipe length 5.5 m (18’)
Maximum pipe length 19.8 m (65”)

As density and compressive strength are design variables for Compression Coat, the values above are given as a general guideline.

Values shown are typical and may vary from plant to plant. Please consult Shawcor for special requirements.

* For D/t up to 80; for D/t between 80 and 100, 1.2° per pipe diameter; for D/t >100, 1.0° per pipe diameter.

** Characteristic proctor cylinder compressive strength.

† Standard value; density can vary from 1760 kg/m3 (110 lbs/ft3) to 2560 kg/m3 (160 lbs/ft3) depending on the end use requirements.

†† Larger diameters may be possible.

Applications / Assets

  • Gas Pipelines
  • Large Diameter Pipelines
  • Oil Pipelines
  • Small Diameter Pipelines
  • Transmission Lines


Last Updated: 2/3/2021 9:52:32 AM
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