Pipeline Protection
REPAIR PATCH, HOT-MELT STICK
REPAIR PATCH, HOT-MELT STICK
Materials designed for repairing damage of two- and three-layer polyethylene factory coatings.
The repair patch is a coextruded, radiation crosslinked polyethylene tape laminated with high-heat polymer adhesive.
The hot-melt stick is based on thermoplastic adhesive (identical to the repair patch adhesive).
PHYSICAL AND MECHANICAL PARAMETERS
Descriptions | Measurement conditions | Values | Method |
ADHESIVE | |||
Thickness, mm, no less than | +23 °C | 0,65 | ASTM D 1000 |
Softening point, °C | +100 °C | +100 | ASTM Е 28 |
Shear strength, N/mm2 | +80 °C | 0,07 | EN 12068 annex H |
BASE | |||
Thickness, mm, no less than | +23 °C | 0,75 | ASTM D 1000 |
Tear strength, MPa | +23 °C | 17 | ASTM D 638 |
Ultimate elongation, % | +23 °C | 400 | ASTM D 638 |
Shore D hardness, no less than | +23 °C | 50 | ASTM 2240 |
Abrasion resistance, Mr | +23 °C | 50 | ASTM D 1044 |
Impact resistance, J, no less than | +23 °C | 15 | EN 12068 annex H |
Indentation resistance, N/mm2, no less than | +80 °C | 10 | EN 12068 annex G |
Adhesion to primed steel surface, N/mm no less than | +23 °C +80 °C |
4,0 0,2 |
EN 12068 annex C |
PATCH | |||
Water absorption, %, no less than | +23 °C | 0,05 | ASTM D 570 annex H |
Adhesion to primed steel surface, after 28 days, N/mm, no less than | +23 °C | 2,5 | ISO 21809-3 annex I |
Heating of the base for 4 hours, visual | +225 °C | no dripping, flowing or cracking | ASTM D 2671 |
APPLICATION
The repair patch is used in compound with the hot-melt stick or mastic filling for repairing damage to pipeline insulation coatings.
The hot-melt stick is used for filling damaged areas of insulation coating before applying the repair patch, as well as for repairing minor damages to insulation coatings.
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