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.
 

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

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.
 

           -  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.