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Tapecoat
20
Hot Applied Coal Tar Pipeline Coating
Hot-applied tar coating in tape form for
underground
gas, oil and water pipelines.
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Application of Tapecoat 20
| Tapecoat 20 is a
hot-applied coal tar coating in tape form for underground gas,
oil and water pipelines. Tapecoat 20 is designed to protect
buried metal surfaces from corrosion and electrolysis. These
surfaces include pipe, pipe joints, fittings, couplings, tanks,
cables, conduit, tie rods and elevator casings. Tapecoat 20 is
resistant to thermal expansion, impact and abrasion. |
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Composition
Tapecoat 20 consists of a
specially formulated pliable coal tar coating completely saturated
into and bonded to both sides of a high tensile strength fabric. In
addition, it has a polyester film adhering to the coating which
facilitates unwinding of the roll and acts as an outer wrap, providing
additional mechanical strength against backfill and soil stress.
Technical Data
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Softening point |
-170°F ± 5°F
(-77°C ± 3°C) |
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Penetration |
0.3 to 0.8 mm at
77°F (25°C) |
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Thickness |
58 ±2 mils (1.47 ±
0.05 mm) |
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ASTM G-8 C.D. |
250 oz / inch width
(2.79 kg/cm width) |
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Elongation |
Passes |
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Oil &
hydrocarbon resistance |
Excellent |
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Specs &
standards |
Meets Federal Spec
HHT 30a and AWWA Standard C203 |
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Compatibility |
Coal tar, asphalt,
polyethylene, polypropylene, FBE and other factory coatings |
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Tests |
ASTM E28, ASTM D5,
ASTM G8, ASTM G20 |
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Application
Equipment: A torch with wide
mouth burner is recommended.
Surface Preparation: Surface
must be clean and dry. Wire brush to remove any loose rust and scale,
dust or dirt. Oil, grease and all other residue are to be removed from
pipe surface. Use torch to warm the surface and remove moisture prior
to priming.
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Primer Application:
TC Omniprime
is the compatible primer for use with Tapecoat 20. Apply primer to the
prepared surface by brush or roller at the rate of approximately 300
square feet per gallon. TC Omniprime should be applied 4" beyond
the area to be wrapped with tape. Let primer dry before applying
Tapecoat 20. TC Omniprime can also be used on stainless steel.
Tape Application: There are two
recommended methods for applying Tapecoat 20 to a properly prepared
and primed surface.
- Spiral Wrap: Flash flame of
torch onto the side of the coating without the polyester film
(outside of roll) until a smooth and glossy finish is obtained.
Apply properly heated coating with tension to the surface of the
pipe. Alternately heat and spiral wrap in a single thickness with a
continuous 1/4" to 1" overlap of tape.
- Cigarette Wrap: Precut strips
of Tapecoat 20 to a length equal to the circumference of the pipe
plus a minimum of 3" for overlap. Follow general tape
application instructions described above.
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