Leaders in Corrosion Management & 

Sealing Technology 

Bitumen Tapes 

DENSO BITUMEN TAPE
 SYSTEMS

Components

• A - Denso Primer D

• B - Denso Mastic 

• B - Densyl Mastic (T)

• C - Densopol 60 Tape

• C - Densopol 60 HT Tape (T)

• C - Densopol 80 Tape

• C - Densopol 80 HT Tape (T)

• C - Densoclad 40 Tape

• C - Densoclad 40 HT Tape (T)

• C - Densoclad 50 Tape

• C - Densoclad 50 HT Tape (T)

• C - Densoclad 70 Tape

• C - Densoclad 70 HT Tape (T)

• C - Denso CPT/PVC 750 Tape

• C - Denso CPT/PVC1000Tape

Instructions for Use

(A = Primer, B = Profiling, C = Tape, D = Overwrapping Tape)      (T = Tropical version)

USE:

For the protection of pipes, fittings and similar structures from corrosion buried or immersed. To protect the metal structures from the environment the tapes must cover the entire surface.

 

SURFACE
PREPARATION:

Surface must be clean, dry and free from grease. Remove all loose rust, scale and flaking coatings by wire brushing to Swedish standard ST3 or blast cleaning to Swedish standard Sa2½.

 

A - PRIMING:

(Denso Primer D)

Brush apply one coat of DENSO PRIMER D over the entire area to be wrapped. Allow to dry.
 

 

C - WRAPPING:

(Densopol / Densoclad / Denso CPT/PVC Tapes)
 

See examples
Application ...

a) Pipes, Rods and Cables

Select as wide a width of tape as practical, e.g. 100mm wide for 100mm diameter pipe. Peel back about 0.5m of interleaving and apply the adhesive side of the tape firmly to the pipe. Unroll the tape about 0.5m, peel back the interleaving and wrap the tape spirally ensuring correct alignment. Maintain sufficient tension to ensure that the tape conforms to the surface without gaps. Repeat this, overlapping each turn by at least 25mm or preferable 55% to give double the thickness. Start new roll by overlapping the ends by one tape width.

Note: Where longitudinal welds are included in the area to be wrapped, apply a 100mm wide strip of the tape longitudinally over the weld and press into the contours before wrapping.
 

See examples
Application ...

(b) Butt Welded Joints

Proceed as (a) but start and finish wrapping with a minimum of 75mm overlap on to be existing pipe coating either side of the joint area.

 

See examples
Application ...

(c) Coating Repairs 

Either cut out a circumferential band of the damage coating and treat as (b) or cut away and remove loose coating from the damaged area and smoother or chamfer edges. Prime the exposed metal and a circumferential band extending 75mm either side of the damage. Build up the damaged area with patches of tape or DENSYL MASTIC, Wrap the section of pipe as (b).

 

INSPECTION:  

Ensure that the entire surface is covered with no gaps or air pockets. Examine adhesion by coupon test 24hr after wrapping. Holiday test at 10kV for single layer and 15 kV for double layer.

 

Check out  'The Proof is in the Testing'

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