Nonmetallic Pipe System

1.3.7

In the event pipe other than metallic pipe is approved and used in lieu of

metallic pipe, all metallic components of this pipe system shall be

protected with cathodic protection. Detailed drawings of cathodic

protection for each component shall be submitted to the Contracting Officer

for approval within 45 days after date of receipt of notice to proceed, and

before commencement of any work.

1.3.7.1

Coatings

Coatings for metallic components shall be as required for metallic

fittings. Protective covering (coating and taping) shall be completed and

tested on each metallic component (such as valves, hydrants and fillings).

This covering shall be as required for underground metallic pipe. Each

test shall be witnessed by the Contracting Officer. Coatings shall be

selected, applied, and inspected in accordance with NACE RP0190 and as

specified in these specifications. The use of nonmetallic pipe does not

change other requirements of the specifications. Any deviations due to the

use of nonmetallic pipe shall be submitted for approval.

1.3.7.2

Tracer Wire

When a nonmetallic pipe line is used to extend or add to an existing

metallic line, an insulated No. 8 AWG copper wire shall be thermit-welded

to the existing metallic line and run the length of the new nonmetallic

line. This wire shall be used as a locator tracer wire and to maintain

continuity to any future extensions of the pipe line.

1.3.8

Tests of Components

A minimum of four (4) tests shall be made at each metallic component in the

piping system. Two (2) measurements shall be made directly over the anodes

and the other two (2) tests shall be over the outer edge of the component,

but at the farthest point from the anodes. Structure and pipes shall be

shown with the cathodic protection equipment. All components of the

cathodic protection system shall be shown on drawings, showing their

relationship to the protected structure or component. A narrative shall

describe how the cathodic protection system will work and provide testing

at each component. Components requiring cathodic protection shall include

but not be limited to the following:

a.

Pipes under the floor slab or foundations.

b.

PIV.

c.

Shutoff valves.

d.

Metallic pipe extended from aboveground locations.

e.

Each connector or change-of-direction device.

f.

Any metallic pipe component or section.

g.

Backflow preventor.

h.

Culvert.

SECTION 13110A

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