19 June 2001
SR-1: PROTECTING STEEL PILES BY COATING OR JACKETING
Problem: A new steel pile has been installed or an existing pile has experienced
slight deterioration (less than 15 percent) of the cross-sectional area at some
point. Protection against further corrosion is required.
Description of Repairs: Clean steel above water with abrasive blasting
equipment and underwater with water jet cleaning equipment.
Epoxy-Polyamide Coating: See Paragraph 3-4.3.1 (see Figure 8-1).
Fiberglass Jacket: Place jacketing around pile and secure. Pour
epoxy grout inside sleeve if grout is used. Seal the top and bottom of the pile to
prevent water entering inside jacket, if mortar is placed between pile and jacket
(see Figure 8-1).
Concrete Jacket: During installation of steel pile, place a concrete pipe
jacket around pile after it is driven. Fill the annular space between concrete
jacket and pile with concrete (see Figure 8-1). The pile must be accessible from
Application: These methods can be used to prevent further rusting. Economics
will govern which method is used based on the extent of overall facility
Future Inspection Requirement: Increased inspections may be required,
particularly in areas where ice may be present, to detect signs of abrasion of the
mastic or jacketing and renewed corrosion of the pile.