US 7,588,058 B2
	Coated pipes for harsh environments
Laurence Waino McKeen, Sewell, N.J. (US); Pidatala K. Mohan, West Windsor, N.J. (US); Steven A. Mestemacher, Parkersburg, W. Va. (US); Kimberly Dawn Farnsworth, Walker, W. Va. (US); and W. Douglas Obal, Bethlehem, Pa. (US)
Assigned to E. I. du Pont de Nemours and Company, Wilmington, Del. (US)
Filed on Nov. 23, 2005, as Appl. No. 11/286,897.
Claims priority of provisional application 60/630889, filed on Nov. 24, 2004.
Prior Publication US 2006/0137757 A1, Jun. 29, 2006
Int. Cl. F16L 11/00 (2006.01)

U.S. Cl. 138—137  [138/140; 138/146; 138/DIG. 3]

3 Claims

1. A rigid pipe for conveying flowable media comprising a lining adhered to the interior surface of the pipe and an insulating lining formed on the exterior surface of the pipe, wherein the lining adhered to the interior surface of the pipe comprises a primer layer comprising fluorine-free polymer binder adhered to the interior surface of the pipe and a fluoropolymer overcoat applied to the primer layer.