Densopol 60 HT Anti-Corrosion Tape for Pipeline Protection
Updated: 33 minutes ago
Densopol 60 HT™ is a tough, cold-applied anti-corrosion tape developed by Denso for protecting and refurbishing steel and ductile-iron pipelines, joints, tie rods, bends and fittings in tropical climates. It is particularly suited to small- and medium-diameter pipes and can be applied manually or using a wrapping machine.
What Is Densopol 60 HT?
Densopol 60 HT is a reinforced laminate tape consisting of a synthetic-fibre fabric impregnated and coated with a polymer-modified bitumen compound and laminated to PVC sheeting. A plastic interleaving film protects the compound surface during storage and is removed during application.
The combination of fabric reinforcement, bituminous adhesive and heavy-duty PVC backing provides a tough protective system for buried or submerged pipework.
Key Features
Densopol 60 HT offers several features for pipeline protection:
Cold-applied installation
Designed for tropical climates
High resistance to shear
Resistance to damage from backfill
Flexible laminate construction
Suitable for hand or machine wrapping
Protection for buried and submerged pipelines
Suitable for small- to medium-diameter pipes
Applications
Densopol 60 HT is designed for protecting:
Steel pipes
Ductile-iron pipes
Welded joints
Pipe bends
Pipe fittings
Tie rods
Buried pipelines
Submerged pipelines
Denso describes the Densopol range as suitable for protecting welded joints on coated pipes, bends and fittings, with the HT grades intended for tropical climates.
Designed for Tropical Climates
The HT version of Densopol is specifically designed for tropical conditions.
Densopol 60 HT has an application temperature range of +15°C to +50°C. Its service temperature is -10°C to +60°C, with a short-term peak temperature of +75°C according to the product datasheet.
This makes Densopol 60 HT relevant to pipeline protection applications where elevated ambient and operating temperatures need to be considered.
Densopol 60 HT Construction
The tape combines several protective layers:
Synthetic-fibre reinforcementProvides mechanical reinforcement within the tape.
Polymer-modified bitumen compoundProvides the adhesive and protective corrosion-barrier layer.
PVC backingProvides a tough outer layer and contributes to the tape's resistance to mechanical damage.
This construction contributes to the product's toughness and flexibility when wrapped around pipe surfaces and fittings.
Typical Properties
According to the Denso product datasheet, Densopol 60 HT has the following typical properties:
Property | Typical value |
Colour | Black |
Backing thickness | 85 µm |
Total thickness | 1.5 mm |
Weight | 1.7 kg/m² |
Elongation | 22% |
Tear strength | 30 N |
Insulation resistance | 10⁶ MΩ |
Dielectric strength | >20 kV/layer |
Impact resistance | 5 Nm |
Adhesion to primed steel | 3.0 N/mm |
Adhesion to itself | 2.5 N/mm |
These are typical product values rather than a specification warranty.
Surface Preparation
Proper surface preparation is important before applying Densopol 60 HT.
The Denso instructions require the surface to be clean and dry and free from grease, with loose rust, scale and flaking coatings removed. The published instructions specify preparation to St3 by wire brushing or Sa 2½ by abrasive blasting.
After preparation, Denso Primer D™ is brush-applied over the complete area to be wrapped and allowed to dry before the tape is applied.
Application of Densopol 60 HT
The tape is applied by wrapping it around the prepared pipe surface.
The general process includes:
Prepare the pipe surface.
Apply Denso Primer D.
Allow the primer to dry.
Remove the protective interleaving as the tape is applied.
Apply the tape with sufficient tension.
Wrap the tape spirally around the pipe.
Maintain the required overlap between turns.
Ensure the finished application is free from creases and folds.
The Denso datasheet specifies an application temperature of +15°C to +50°C for Densopol 60 HT.
Overlap and Inspection
During application, the tape should be applied with sufficient tension and without creases or folds.
Denso's published application guidance specifies an overlap of at least 15 mm or 55%, producing a double-thickness wrap.
For holiday detection, the published instructions specify 10 kV for one layer and 15 kV for two layers for Densopol 60 HT.
Denso Primer D
Denso Primer D™ is the recommended primer for Densopol 60 HT.
It is a fast-drying, bitumen-based primer designed for use before applying Densopol tapes, including their high-temperature grades for tropical climates.
Using the recommended primer helps establish the required interface between the prepared substrate and Densopol tape.
Densopol 60 HT for Buried Pipelines
Densopol tapes are specifically designed for long-term protection of buried pipework and associated components.
Denso's product range is intended for applications involving buried or submerged pipelines, including protection of welded joints, bends and fittings.
The tape's resistance to damage from backfill makes it suitable for applications where wrapped pipelines are subsequently surrounded by soil or other backfill material.
Densopol 60 HT in Pipeline Projects
Denso has documented applications of Densopol 60 HT on buried fuel pipelines in tropical and challenging environments.
For example, Denso reported the selection of Densopol 60 HT for protecting a 1 km DN250 carbon-steel buried fuel pipeline at a combined-cycle power plant project in Sri Lanka. The application involved a tropical environment and the product was selected for pipeline protection.
Densopol 60 HT in Saudi Arabia
Pipeline infrastructure in Saudi Arabia can involve high ambient temperatures and demanding environmental conditions.
Densopol 60 HT provides a tape-based corrosion-protection option designed specifically for tropical climates, with cold application and suitability for buried or submerged pipeline applications.
It can be considered for pipeline-related requirements in:
Riyadh
Dammam
Jubail
Jeddah
Tabuk
NEOM
Industrial and infrastructure projects throughout Saudi Arabia
Selecting the Right Densopol Grade
Denso offers several Densopol grades.
Densopol 60: For small- to medium-diameter pipes in standard temperature conditions.
Densopol 60 HT: For small- to medium-diameter pipes in tropical climates.
Densopol 80: For medium- to large-diameter pipes in standard temperature conditions.
Densopol 80 HT: For medium- to large-diameter pipes in tropical climates.
The appropriate grade should be selected according to pipe diameter, environmental conditions, application temperature and project requirements.
Availability
According to the Densopol 60 HT datasheet, the product is available in 10 m or 30 m rolls, with widths ranging from 50 mm to 300 mm. Additional sizes may be available on request.
Conclusion
Densopol 60 HT™ is a reinforced, cold-applied anti-corrosion tape designed for protecting steel and ductile-iron pipes, welded joints, bends, fittings and other components in tropical climates.
Its fabric-reinforced polymer-modified bitumen compound and PVC backing provide a tough protective laminate suitable for buried and submerged pipeline applications.
With an application temperature range of +15°C to +50°C and service temperatures of -10°C to +60°C, Densopol 60 HT is designed for applications where tropical conditions and pipeline corrosion protection are important considerations.
Sahmas supports Densopol 60 HT requirements for pipeline and corrosion-protection projects across Saudi Arabia, including Riyadh, Dammam, Jubail, Jeddah, Tabuk and NEOM.
Comments