B - Operations – Transporting – 05 – D
Patent
B - Operations, Transporting
05
D
B05D 1/18 (2006.01) F16L 57/00 (2006.01) F16L 58/10 (2006.01)
Patent
CA 2155904
A method of coating a corrugated pipe (20) includes preparing an asphalt composition (30) having a polymer constituent within the range of from about 3 to about 20 percent, the composition (30) having a softening point within the range of from about 180°F (82°C) to about 250°F (121°C), and a viscosity at a temperature of 360°F (182°C) within the range of from about 600 (0.6 Pa s) to about 4000 cps (4 Pa s), heating the asphalt composition (30) to a temperature within the range of from about 340°F (171°C) to about 390°F (199°C), and coating the corrugated pipe (20) by positioning at least a portion of the corrugated pipe (20) in the heated asphalt composition (30) for a time sufficient for the corrugated pipe (20) to reach a temperature of at least 150°F (66°C). The coated pipe (20) is then removed from the asphalt composition (30) for cooling.
Janicki Richard T.
Keating Jay Walter
Owens Corning
Smart & Biggar
LandOfFree
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