A6 Attachment 3 Revised Section 33 11 18 HDPE Pipe.pdf

Big Sandy Dam Reservoir Enlargement Eden Project, Wyoming Solicitation No. 140R4020R0015

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SECTION 33 11 18

HDPE PIPE

PART 1 GENERAL

1.01 MEASUREMENT AND PAYMENT

A. 42-Inch Diameter HDPE Pipe:

1. Measurement: Length along pipe centerline between ends of pipe in place.

2. Payment: Linear foot price offered in the Price Schedule.

a. Includes cost of furnishing materials; manufacturing and laying pipe, and furnishing and placing concrete encasement.

1.02 REFERENCE STANDARDS

A. ASTM International (ASTM)

1. ASTM D3350-14 Polyethylene Plastic Pipe and Fittings Materials

2. ASTM F412-17a Terminology Relating to Plastic Piping Systems

3. ASTM F2164-18 Field Leak Testing of Polyethylene (PE) and Crosslinked Polyethylene (PEX) Pressure Piping Systems Using Hydrostatic Pressure

4. ASTM F2206-14 Fabricated Fittings of Butt-Fused Polyethylene (PE) Plastic Pipe, Fittings, Sheet Stock, Plate Stock, or Block Stock

5. ASTM F2620-13 Heat Fusion Joining of Polyethylene Pipe and Fittings

6. ASTM F1417-11a Installation Acceptance of Plastic Non-pressure Sewer Lines Using Low-Pressure Air

B. American Water Works Association (AWWA)

1. AWWA C906-15 Polyethylene (PE) Pressure Pipe and Fittings, 4 in. (100mm) Through 63 in.

(1,575 mm), For Water Distribution and Transmission

1.03 SUBMITTALS

A. Submit the following in accordance with Section 01 33 00 – Submittals.

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B. RSN 33 11 18-1, Approval Data:

1. Show pipe restraints and fabrication details.

2. Manufacturer’s installation instructions: indicate special procedures required to install products specified.

3. HDPE temperature control plan describing the Contractor’s approach to controlling movement of the pipeline related to thermal expansion and contraction during installation, including concrete encasement. Plan shall address control of movement during installation and encasement of pipe, specifically Contractor’s approach to prevent uplift of HDPE pipe during concrete placement.

C. RSN 33 4611 3618-2, Certification:

1. Manufacturer's certification that raw materials and pipe meet specification requirements.

D. RSN 33 11 18-3, Fusion Procedures:

1. Fusion temperature.

2. Interface pressure.

3. Cooling time.

4. Proposed joint repair procedures.

5. Fusion parameters including the recommended limits of all criteria recorded by the data logger.

E. RSN 33 11 18-4, Pipe Acceptance:

1. Leak testing results based on ASTM F2164.

2. Fusion data logging results for all fusion welds.

F. RSN 33 11 18-5, Pipe Measurements:

1. Measurements as indicated in the specifications to ensure pipe is within tolerance and Pipe Deflection limits.

1.04 QUALIFICATIONS

A. Pipe laying workers: Skilled and experienced in laying pipe with butt fusion joints.

1.05 DELIVERY, STORAGE, AND HANDLING

A. Prevent damage to pipe and fittings during loading, transporting, unloading, storing, and laying.

B. Maintaining circularity of pipe.

1. Before shipping, install internal supports in pipe to maintain circularity.

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2. Supports:

a. Two members at 90 degrees to each other.

b. Minimum member cross section: Nominal 2- by 4-inches.

3. Place supports at 5 feet from ends of each pipe section.

4. Orient support legs in same axis along pipe centerline.

C. Transport pipe and fittings with padded bolsters. Use heavy padding under ties.

D. Do not store HDPE pipe in unprotected, outside storage for more than 2 years.

PART 2 PRODUCTS

2.01 PIPE

A. HDPE Pipe, DIPS: AWWA C 906, DR 32.5, except;

1. PE material:

a. Standard PE code designation: PE 3408.

b. Minimum cell Classification, ASTM D3350: PE 345464C, or E.

2.02 FITTINGS

A. Connections at structures: Fabricated from HDPE unless otherwise specified, or as shown on drawings.

B. HDPE fittings: In accordance with AWWA C906, ASTM F2206, and as shown on drawings.

1. Material: PE3408.

2.03 CONCRETE

A. Concrete in encasement: Section 03 30 00 – Cast-in-Place Concrete

2.04 CONTRACTOR SOURCE QUALITY TESTING

A. HDPE Fittings:

1. Notify Technical Service Center, Attn 86-68110, and Construction Manager 14 days before HDPE fittings are tested.

2. Test HDPE fittings in accordance with AWWA C906.

2.05 SOURCE QUALITY ASSURANCE

A. Approval for Shipment:

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1. Pipe approval will be determined by inspection, during and after manufacture, to determine whether pipe conforms to AWWA C906.

2. Notify the Technical Service Center, Attn D-8110, and Construction Manager at least 14 days before manufacturing pipe and 72 hours before shipping pipe.

3. The Government will inspect pipe units and will approve for shipment those which have been manufactured and tested in accordance with these specifications, unless the Contractor is notified otherwise in writing.

4. Further inspection of pipe units will be in accordance with the clause at FAR 52.246-12 "Inspection of Construction."

PART 3 EXECUTION

3.01 LAYING PIPE

A. Excavate pipe foundation in accordance with Section 31 23 16 - Excavation of Existing Embankment and Foundation.

1. Place Zone 1A material and lean concrete as shown on drawings to provide uniform slope along bottom of pipe.

2. Lower pipe into the trench and place pipe in position such that no soil gets inside the pipe and pipe is not damaged.

3. Keep pipe trenches free of water during pipelaying operations.

B. Joining Pipe:

1. Make heat fusion joint in accordance with recommendations of ASTM F2620.

C. After pipelaying and joining operations are completed, clean inside of pipe and remove debris. When pipelaying is not in progress, keep ends of pipeline closed.

D. Following joining operations and prior to concrete encasement, pipe shall be leak tested in accordance with ASTM F2164.

E. Place concrete about pipe carefully to avoid displacement of the pipe.

1. Encase entire pipeline, as shown on drawings, prior to constructing either the impact basin or the inlet structure.

2. Adjacent encasement shall be placed before placement of the inlet structure and impact basin.

3. Ensure HDPE pipe will not be displaced during concrete placement, based on

Contractor’s proposed plan in RSN 33 11 18-1.

F. Backfill concrete encased pipe in accordance with Section 31 23 11 – Earthwork for Structures.

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3.02 CONNECTION AT STRUCTURES

A. Connect pipe to structures as shown on drawings.

3.03 TOLERANCES

A. Lay pipe to lines and grades shown on drawings or established by the COR to the following tolerances:

1. Departure from and return to established alignment and grade, maximum: 1/16-inch per foot of pipe.

2. Total departure from established alignment and grade, maximum: 1-inch.

3.04 PIPE DEFLECTION

A. Measure deflections in pipe following concrete encasement.

B. Allowable vertical pipe diameter deflection after concrete encasement is complete:

1. Decrease, maximum: 5 percent of nominal pipe diameter.

2. Elongation, maximum: 3 percent of nominal pipe diameter.

C. Within 2 weeks after concrete encasement is completed, take measurements of internal diameters.

1. When interior bracing required, remove before making measurements.

D. Measurement frequency:

1. Every 25 feet of concrete encased pipe.

E. Measurements:

1. Measure vertical and horizontal diameter at approximate midpoint of pipe unit.

2. Record pipe deflections and station where measurements were taken.

F. If a pipe deflection exceeds the allowable:

1. Provide measurements to COR.

2. Additional direction will be provided to the Contractor after deflection data is analyzed.

END OF SECTION

Eden Project, Wyoming Solicitation No. 140R4020R0015

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