ABEK LTD

DENSO CORROSION PREVENTION SYSTEM FOR PIPES AND STRUCTURES

DENSOLID polyurethane products
The DENSOLID® range of polyurethane-based special corrosion protection products. Two-component coating products offer the best possible protection while being extremely user-friendly and safe to apply.
The DENSOLID® range of products comprises:
• Polyurethane hot sprayed coatings
• Polyurethane brush applied coatings
• Polyurethane coatings for pipe jacking, thrustboring and HDD
Special polyurethane-based solutions for plastic pipes or ground-to-air transitions

DENSOLEN® butyl rubber tapes

Cold applied, self-adhesive synthetic tapes for corrosion protection coating of pipes, tanks and plant and also for the insulation of electrical installations. DENSOLEN® butyl rubber tapes are cold applied synthetic tapes with overstretch prevention layer in polyethylene and butyl rubber coating on both sides.
The types of tapes differ in tape thickness, color and resistance to temperature. DENSOLEN® butyl rubber tapes self-amalgamate in

the overlap area to form a sleeve-like, waterproof and electrically highly insulating coating. Their suppleness means that DENSOLEN® butyl rubber tapes conform particularly well to the underlying layer.
Areas of use:
Corrosion protection
• For the coating of above-ground installations
• As an inner wrap for the corrosion protection of metallic pipes (longitudinal and helical seam welded), welded joints, tanks and plant. Used in combination with DENSOLEN®- PE tapes (2-ply synthetic tapes) as an outer wrap.
• As a corrosion protection coating for metallic pipes laid in walls or floors in house installations (N-tapes). Corrosion protection coating for pressfitting systems (N-tapes).
Sealing
• Galvanic separation seal in joints between different metals to avoid contact corrosion
• Sealing of riveted and bolted joints in bodywork and vehicle construction
• Sealing intermediate layer for bodywork and vehicle insulation Electrical insulation
• Insulation and sealing of coupling sleeve at cable entry point into the coupling sleeve
• Cable entry points into boxes, casings and cabinets in open air and wet room installations
• Cable installations in signal and communications technology
• Roof entry points of power and communications cables and antenna masts
• Contact protection for interior gas piping in front of and behind IC couplings

DEKOTEC® Heat Shrink Sleeves

DEKOTEC® HTS heat shrink sleeves are wraparound sleeve with an electron beam irradiation crosslinked polyethylene backing and a hotmelt adhesive.

Structure of the Corrosion Prevention System

DEKOTEC® Heat Shrink Sleeves offer proven corrosion prevention over a wide application range. Basically DEKOTEC® HTS products can be applied as a 2-layer or 3-layer system.

2-layer systems (Shrink Sleeve directly applied on steel surface)

+ simple application
+ cost efficient
- no epoxy layer

2 layer & 3 layer sleeve systems
3-layer systems (Heat shrink sleeve applied on EP-Primer)
+ same structure as 3 LPE factory coating
+ lower cathodic disbonding
- application more complicated
- expensive
- blast cleaning necessary

DEKOTEC® HTS-70 is a DIN-DVGW approved system, stress class C-60 UV.
DEKOTEC® HTS-90 is a DIN-DVGW approved system, stress class C-80 UV.
DEKOTEC® EP-Primer is an epoxy-based, solvent-free liquid primer.
DEKOTEC® DRP is a repair kit for damages in corrosion protective coatings.
DEKOTEC® Application Tools round up the DEKOTEC® HTS product portfolio.

DENSOLEN®
DENSOLEN® tapes and tape systems have been used for more than 40 years to provide long-term corrosion protection for buried pipes, welded joints, pipe bends and structural elements.
The invention of the first three-ply composite tape (DENSOLEN®-Tape S40) by DENSO in 1971 was followed about 10 years later by further development to produce the asymmetrical three-ply tapes mainly used today. DENSOLEN® tape systems have been used very successfully in large-scale pipeline construction and in pipeline renovation since 1971. Thanks to constant improvement and the use of modern polyethylene materials, DENSOLEN® tape systems even today represent the state of the art in corrosion protection composite tape.

DENSOLEN® tapes can be combined in various ways to make tape systems. All systems have in common that a self-amalgamating three-ply tape or a butyl tape is always used for the innermost layer of corrosion protection. Only tapes of this type amalgamate in the overlap area to form a sleeve-like coating that is practically diffusion resistant to water vapor and oxygen.

Petrolatum - Tapes & mastics

Durable corrosion protection of pipeline components with complex shapes is most reliably achieved by using supple petrolatum tapes that follow the contours of the components. Combination with a pipe protection fleece guarantees additional, very good mechanical protection. This method of working is expressly approved by the DVGW (Deutscher Verein des Gas-und Wasserfachs e.V. - German Association for the Gas and Water Industries) worksheets G462 and G463.

The irregular geometry of slide valve groups and ball valves in particular places high demands on the adaptability of the wrapping material. The combination of the DENSO® petrolatum products with DENSOLEN® tapes and DENSOLEN® Rockshield DRM-PP fleece provides easy to apply and safe corrosion protection with very good resistance to mechanical stresses. Pipe components such as for example lubrication and ventilation lines can be wrapped using DENSOLEN®-Tape AS40 Plus. Combined with DENSOLEN®-Primer HT, three or four layers will achieve stress class B-50 or C-50 respectively.

Surfaces and parts with complex shapes are protected using petrolatum

mastics and tapes. For the combined application of DENSOLEN® petrolatum products, the DENSOLEN® products must be applied first in every case, as otherwise the petrolatum may have an adverse effect on the adhesion of the DENSOLEN® tapes. Recesses, voids and crevices must be filled void-free with DENSO® Mastic PF or DENSOPLAST®-Mastic. In the next stage of work, a total of three layers of

DENSOPLAST®-Tape are applied to the part to be protected in a spiral wrap or strip by strip procedure.
The DENSOLEN® Rockshield protection fleeces have proved their usefulness in increasing the mechanical resistance of plastic corrosion protection coatings. DENSOLEN® pipe protection fleeces are laid in strip segments and flamed in the overlap area to fuse them.

Corrosion protection system for flanges
For flange connections, the flange gap and the connecting bolts pose special challenges for corrosion protection coatings.
A proven method of evening out the surface is to fill the flange gap and even out the bolt heads and nuts with DENSO® Mastic PF or DENSOPLAST®-Mastic.
Subsequent wrapping with DENSOPLAST®-Tape ensures reliable corrosion protection. The additional wrapping with DRM-PP 500 Rockshield fleece gives the anti-corrosion system high mechanical stability to resist indentation and impact stress.

DENSO Application equipment
DENSO application devices are aids specially designed for on-site conditions for applying the range of DENSO products.
DENSOMAT® wrapping machines simplify the application of DENSOLEN and DENSIT tapes and systems. Hand and motor-driven machines ensure that the necessary tension and overlap is maintained. Using wrapping machines increases the speed and safety of post-factory coating using tape systems.

DENSOMIX® application equipment for 2-component polyurethane systems makes it possible to apply DENSOLID® products in cartridge packaging. The DENSOMIX® DXH / DXR system represents a completely new method of application. The stationary filling equipment DENSOMIX® DXR provides refills for the DENSOMIX® DXH dispenser. The supply of components A and B in hobbocks minimizes the cartridges at the filling equipment.

DENSO®- Mastic KW

Plastic spatula corrosion protection mastic on a petrolatum base for use in cooling technology.
Use
DENSO®- Mastic KW is used for corrosion protection for pipes and plant in cooling technology. DENSO®-Mastic KW is used to apply cold-insulating materials in the form of shells, segments or panels.
DENSO®-Mastic KW is a corrosion protection compound with a paste-like consistency and improved with minerals and polymers. The formula of the mastic is specially devised for cooling technology. DENSO®-Mastic KW moistens the metal surface to be protected and prevents the access of water.
DENSO®-Mastic KW will not make metal and insulating material adhere to one another - plant and pipes remain accessible.
Application
Spread the mastic with a spatula into the hollows of insulation half-shells or segments, or to the side of the thermal insulating panels to be fixed and the surface to which they are to be bonded. Place the insulation pieces thus prepared on the parts, pressing gently. Then wrap the insulation shells on the pipeline with DENSO®-Tape 040, or DENSOLEN®-Tape PE3 with 50% overlap.

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