Basic Use
Tapecoat HT-MB High Temperature Tape is designed to protect buried and submerged pipe, pipe type cable, pipe joints, fittings, tanks, insulated steam lines, and other metal surfaces from corrosion and electrolysis over a wide range of in-service temperatures up to 250°F (121°C) in constant or peak load operating conditions. Tapecoat HT-MB may be applied to new pipelines and to pipelines operating at elevated temperatures.
Composition
Tapecoat HT-MB is a pre-formed, cold applied, self-adhering coating that is impermeable to water and salt. The specially formulated "high temperature" adhesive is laminated to a woven polypropylene backing. The very aggressive adhesive is kept from permanently bonding to its backing by a tough, easily removed polymer release liner, which also prevents contamination of the adhesive prior to its use.
Technical Data
|
Color |
Black |
|
Service temperature |
-30ºF to 250ºF (-35ºC to 121ºC) |
|
Application temperature |
-30ºF to 185ºF (-35ºC to 85ºC) |
|
Total thickness |
30-50 mils (0.76-1.26 mm) |
|
Adhesion (primed steel) |
250 oz/inch width (2.79 kg/cm width) |
|
Mesh Net |
|
Tensile strength |
50 lb/inch width (8.95 kg/cm width) |
|
Dielectric strength |
Exceeds 12 kV |
|
Sale crock test |
Pass |
|
Insulation resistance |
106 megohoms |
|
Water vapor transmission rate |
0.01-0.20 g / 100 in2 / 24 hr
(0.25-3.1 g / m2 / 24 hr |
Surface Preparation
Surface must be dean and dry. Moisture, dust, dirt, rust or other foreign matter should be removed by scraping or wire brushing. SSPC-SP3 Power Tool cleaning is recommended. Remove oil and grease, etc. with suitable detergent. Remove salt and other contaminants by high pressure fresh water cleaning. Optional cleaning method is SSPC 6 Commercial Blast.
Application
Priming: If operating temperatures do not exceed 180°F (85°C) TC Omniprime® is the primer of choice. TC 7000 Epoxy has been developed specifically for use with HT-MB when service temperatures are between 180°F and 250°F (85°C and 121°C). Either primer can be applied by brush or roller. Allow either primer to dry to touch before applying HT-MB.
Tape Application: Tapecoat HT-MB is applied by hand, with the Tapecoat Hand Wrapster #3, or by plant or over-the-ditch tape wrapping methods. Tapecoat HT-MB is applied by removing the release liner and spirally wrapped with minimum 50% overlap. Wrapping tension is to be maintained to obtain conformability of the tape to the surface being coated.
Note: Tapecoat 2025 Rockshield (Terrashield) is recommended in areas where rough backfill is expected.
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