Apparatus for the external coating of a pipeline with foamed plastic

Patent · Tue Dec 10 04:00:00 EST 1974

OSTI ID:5040178

Grillos, W J

A pipeline coating apparatus is described for applying a plastic, preferably polyurethane, to a pipeline and maintaining the plastic in a fixed cross-sectional shape until the plastic cures to coat the pipeline with a foamed plastic. A traveling frame adapted to surround and move along the pipeline includes a sleeve of endless belts forming a curing chamber. The liquid plastic is injected into the leading end of the chamber where it cures to a foamed state. The endless belts, being free to move, prevent relative movement between the plastic and the inner surface of the belts thus preventing sliding contact which could damage the plastic coating. (1 claim)

• Assignee: Shell Oil Co.
• Patent Number(s): US 3853443
• OSTI ID: 5040178
• 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-)
DEPOSITION
DESIGN
EQUIPMENT
MATERIALS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PETROCHEMICALS
PETROLEUM PRODUCTS
PIPELINES
PLASTICS
POLYAMIDES
POLYMERS
POLYURETHANES
SURFACE COATING
SYNTHETIC MATERIALS