How wrappers protect hot enamel coatings

Journal Article · Tue Feb 01 04:00:00 EST 1983 · Pipeline Gas J.; (United States)

OSTI ID:5945088

Hoiberg, A J

If the only difference between the two pipe protection systems reported is an outerwrap of either asbestos felt or the polyethylene/kraft material, the system with asbestos felt appears to protect the enamel better against indentation. It also reinforces the system and is not damaged at coal tar enamel application temperatures. Polyethylene/kraft laminated wrap provides much less puncture and indentation resistance than the No. 15 asbestos felt. Even the No. 8 felt provides much more puncture and indentation resistance than the polyethylene/kraft wrapper. The polyethylene/kraft wrap also does not bond to hot coal tar enamel and is actually deformed by it. Kraft paper greatly increases the indentations and puncture resistance of the outerwraps in the laboratory tests. It is not known, however, how long kraft retains this strength when buried in the ground. Fiber glass reinforcing wraps (woven and non-woven) also increase the indentation resistance of all systems tested. Woven glass provides enough support so that even the polyethylene material did not puncture when wrapped over it. The fiber glass outerwrap provides the least effective puncture and identation resistance of all the outerwraps tested under these conditions.

• Research Organization: Pipeline Coatings Consultant, Denver, Colorado
• OSTI ID: 5945088
• Journal Information: Pipeline Gas J.; (United States), Journal Name: Pipeline Gas J.; (United States) Vol. 210:2; ISSN PLGJA
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
022000* -- Petroleum-- Transport
Handling
& Storage
03 NATURAL GAS
032000 -- Natural Gas-- Transport
Handling
& Storage
42 ENGINEERING
420205 -- Engineering-- Transport & Storage Facilities-- (1980-)
ASBESTOS
COAL TAR
COATINGS
COVERINGS
DEFORMATION
ENAMELS
FIBERGLASS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OTHER ORGANIC COMPOUNDS
PIPELINES
POLYETHYLENES
POLYMERS
POLYOLEFINS
PROTECTIVE COATINGS
TAR