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Technologically Advanced | Online Installation | Cost Effective | Verified as per ASME PCC-2
Full-composite Epoxy Sleeve Designed for the Strengthening and Protection of Offshore Risers & Conductors.
Redefining PipelineRepair Technology
The Helicoid Epoxy Sleeve™ is a helically-wound, carbon-fibre reinforced, mechanically-interlocking Polyethylene (PE) strip. The sleeve allows for an annulus of approximately 40mm around the pipe to be filled with an epoxy or cementitious grout, providing outstanding strengthening and protection qualities.
Designed, tested and certified in accordance with the ASME PCC-2, the Helicoid Epoxy Sleeve is an accepted repair method under the ASME B31.4 & ASME B31.8S, for repairs of external wall thinning, dents and gouges.
The Helicoid Epoxy Sleeve, available in diameters from 150 mm up to 750 mm, boasts completely diver-less and online installation on vulnerable offshore risers & conductors, with specific focus on the critical splash-zone area. With a total length of approximately 6.00m, the sleeve covers approximately 3.00m above and below the Mean Sea Level (MSL), ensuring a more effective and comprehensive repair system.
Diagram: Sectional Cut-Out Detail
Mechanically Interlocking PE or PTFE Sleeve
Carbon Fibre Reinforcement
Polyamide End Cap
Epoxy Grout Fill
Typical Installation Sequence on a Riser or Conductor
A. Winding of the Sleeve
Installation of the winding cage Insertion of PE strip to begin initial winding process
The bottom Polyamide End cap is attached
The sleeve is then wound to its full, required length
1. 2. 4.
B. Grouting Process
“Grout collector” is placed to prevent spillage
Application of Epoxy or Cementitious grout, through tremie method
Completed filling of the sleeve annulus
The top Polyamide End cap is placed
1. 2. 3. 4.
C. Surface Preparation
Installation of the Helicoid Surface Preparation Equipment
The installation of the Helicoid Epoxy Sleeve is preceded by Surface Preparation, capable of removing neoprene liners & coatings, as well as heavy marine growth up to 3.00m below Mean Sea Level (MSL), without the intervention of divers.
The lightweight, modular and semi-autonomous system can be installed by a crew of 2 technicians and is capable of achieving surface cleanliness up to Industrial Hydroblasting Standard SSPC-SP-12-WJ3 by means of Ultra High Pressure Water blasting.
The progress of the surface preparation can be monitored using integrated underwater cameras.
The telescopic extension allows for underwater cleaning of the riser or conductor
The telescopic extension is retracted, allowing for cleaning in stages.
Surface preparation of the pipe above the water
1. 2. 3.
4.
The riser or conductor is fully cleaned up to bare metal
5.
3.
Reinforcement Properties
• Fibre Nature: Carbon fiber, Torayca T700 SC• Fibre Direction: Uni-directional, Pultruded• Flexural Strength (ASTM D 790):1480 N/mm2
• Flexural Modulus (ASTM D 790): 89000 N/mm2
• Tensile Strength (ASTM D 3039): 2350 N/mm2
• Tensile Modulus (ASTM D3039): 140,000N/mm2
• Elongation at Break (ASTM D 3039): 0.8 %• Poisson Ratio: 0.2• Density: 1750 kg/m3
Grout Properties
• Chemical Family: Epoxy• Compressive Strength (ASTM C 109) : 100 N/mm2
• Compressive Modulus (ASTM C 109 ) : 2100 N/mm2
• Flexural Strength (ASTM D 790) : 26 N/mm2 @ 7 days• Tensile Strength (ASTM D 638) :14 N/mm2 @ 7 days• Coeff. of Therm. Exp. (ASTM D 351) : 28.1 x103
• Bond Strength to Steel (UW) (ASTM D 4541) >10.5 MPa• Heat Deflection Temp (ASTM D 648) : 83 degrees C• Water Penetration Test (BS EN 12390-8: 2009/ MS EN 12390- 8: 2012): 0mm• Chloride Permeability Test (ASTM C1202-12): Negligible
PE Strip Properties
• Tensile Strength (ASTM D 638) : 28 N/mm2
• Flexural Modulus (ASTM D 790) : 1400 N/mm2
• Izod Impact (ASTM 256) 0.07 Joules/mm of Notch• Heat Deflection Temperature (ASTM D 648):(@0.5N/mm2): 78 degrees C• Water Absorption(ASTM D 570): 0.10 %• Coeff. of Lin. Therm. Exp. (ASTM D 696 ): 3.85 mm/mm/degrees C x 10-5
Main Characteristics(Tested under lab conditions)
• Cost-effective• Pre-engineered• Off-the-shelf• Range of diameters from 150-750mm• Lengths of up to 10m• For the strengthening and protection of Risers & Conductors• Diver-less installation for splash-zone areas to Risers and Conductors• Easy and fast, On-line installation• Above water and subsea installation• Corrosion, Impact and Marine Growth resistant• Withstands temperatures up to 90 Degrees Celsius• Tested in accordance with ASME PCC-2 independently verified by Lloyd’s Register
Benefits of HelicoidEpoxy SleeveTM
MALAYSIA Merit Technologies Sdn Bhd(comp. no. 655607-U)
No.8, Jalan PJU 3/45Sunway Damansara Technology Park, 47810 Petaling JayaSelangor Darul Ehsan, Malaysia
T + 603 7805 3811F + 603 7805 4811E [email protected] www.helicoid.com.my
INDONESIAPT Trimitra Supply Marine Indonesia (TSMI)
T + 62 21 759 99947F + 62 21 759 99888E [email protected] www.tsmi.co.id
THAILAND & MYANMARPipeline & Piling Services Co. Ltd (PAPS)
T + 66 2 745 9348F + 66 2 399 0908E [email protected] www.paps-thailand.com
ABU DHABIUnique System LLC
T + 971 2 5575563F + 971 2 5575564E [email protected] www.uniquegroup.com
QATARUnique System Trading & Engineering Wll
T + 974 4414 7079F + 974 4415 0501E [email protected] www.uniquegroup.com
EGYPTMarinetech Egypt
T + 2 02 2704 6800F + 2 02 2704 6900E [email protected] www.marinetechegypt.com
NIGERIA & ANGOLAGiles Engineering Services Nig Ltd
T + 2347 0136 739 50F N/AE [email protected] www.gilesconsultancy.com
BRUNEIMaspa Inspection & Testing Services Sdn Bhd
T + 673 322 0192F + 673 322 0193E [email protected] www.mits.com.bn
VIETNAMTran Le Gia Co., Ltd.
T + 84 8 3849 5195F + 84 8 3849 5196E [email protected] www.tranlegia.com
INDIAUnique Hydrographic Systems Pvt Ltd
T + 00 91 222 7619 939F + 00 91 222 7619 976E [email protected] www.uniquegroup.com
SHARJAHUnique Wellube FZC
T + 971 6 5130333F + 971 6 5130444E [email protected] www.uniquegroup.com
OMANUnique Tile Services LLC
T + 968 2478 5818F + 968 6478 3318E [email protected] www.uniquegroup.com
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