Tab_13_Amendment_3_Attachment_1_Revised_Specifications_Sections.pdf

Navajo Gallup Water Supply Project Cutter Lateral - Reach 22B Solicitation No.

Pipeline General Requirements

33 11 10 - 1

SECTION 33 11 10

PIPELINE GENERAL REQUIREMENTS

PART 1 GENERAL

1.01 MEASUREMENT AND PAYMENT

A. Line Pipe:

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

Continuous through fittings, and road crossings with no allowance for lap at joints.

a. Measurement for line pipe will begin downstream of Pumping Plant No. 1 yard (1695-D-60028) and end upstream of Regulating Tank No. 2 (1695- D-60044).

b. Stations shown on plan and profile drawings are break points between various bid items for providing line pipe.

c. Includes

1) Coating Line Pipe and Fittings.

2) Pipe Crossings.

2. Payment: Applicable linear foot price offered in the Price Schedule for various sizes and classes of line pipe.

a. Includes cost of furnishing materials; providing pipe; fittings, providing bedding and embedment; providing utility markers; providing concrete, cement, and reinforcement steel in encasements, blocking, and collars not included elsewhere.

b. If after award of contract, the next larger size of pipe is required to meet the inside diameter requirement of this section, fittings and associated valves must be the same as the larger pipe size.

c. Payment for larger size pipe, valves, and fittings will be made at the unit price offered in the Price Schedule for this section denoted size and not for the larger size.

B. Filling and Testing Water:

1. Measurement: Volume of Water for filling and testing.

a. Only water used as directed by the COR will be included.

b. Quantity will be measured in tanks or tank trucks of predetermined capacity or by means of water meters.

c. Types of water meters used for measuring water for subject to COR's approval.

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2. Payment: M (1,000) gallons price offered in the Price Schedule.

C. Repair Kit:

1. Payment: Lump sum price offered in Price Schedule.

1.02 DEFINITIONS

A. Line Pipe Stationing:

1. Sta 22249+52.72 to Sta 22608+47.06.

2. Sta 22610+23.06 to Sta 23092+42.55.

B. Pipe sizes and classes: Designated on plan and profile drawings by an alphanumeric symbol.

1. PVC and HDPE pipe:

a. Symbol identifies pipe diameter and dimension ratio as follows:

1) First number in the symbol indicates nominal diameter in inches.

2) Alphanumeric indicates dimension ratio as defined in AWWA C900, AWWA C905 and AWWA C906.

3) Number in parenthesis is the hydrostatic head measured to centerline of pipe.

4) A symbol of 24DR25 means the pipe is 24 inches in diameter with a dimension ratio (DR) of 25.

2. Symbol Pipe Designation is defined as follows:

1) First number in the symbol indicates nominal diameter in inches.

2) The alphabetic character represents the cover class of pipe where; A < 5 ft., 5

ft. < B < 10 ft, 10 ft. < C < 15 ft and 15 ft. < D < 20 ft.

3) Second number in the symbol is the hydrostatic head measured to centerline of pipe.

4) A symbol of 24C600 means the pipe is 24 inches in diameter with a cover between 10 and 15 feet and a hydrostatic head of 600 feet at the center line of pipe.

3. Unless specific reference is made to outside diameter of pipe, pipe diameters shown on drawings and used in this section are inside diameters.

4. Ductile Iron Pipe (DI):

a. Symbol identifies pipe as follows:

1) First number indicates nominal diameter in inches.

2) Nominal diameter nomenclature DIOD for ductile iron outside diameter.

3) The next number is the pipe pressure class in psi.

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4) A symbol of 24DIOD250 means the nominal diameter of the pipe is 24 inches with a ductile iron outside diameter nomenclature. The pressure class is 250 psi.

5. Steel Pipe:

a. Symbol identifies the pipe as follows:

1) First number is the nominal diameter in inches.

2) The second number is the steel pipe wall thickness in inches.

3) A symbol of 24 inches - 0.125 inches means the nominal diameter for the pipe is 24 inches and the steel pipe wall thickness is 0.125 inches.

6. Pipe designations shown on drawings and in this section establish minimum requirements for pipe types allowed.

Table 33 11 10A- Symbol Pipe Equivalents

Symbol Pipe Designation PVC HDPE Steel Ductile Iron

24B50 24DR32.5 30DR32.5 N/A N/A

24D50 24DR25 30DR32.5 N/A N/A

24B75 24DR32.5 30DR32.5 N/A N/A

24B100 24DR32.5 30DR32.5 N/A N/A

24B125 24DR32.5 30DR32.5 N/A N/A

24B150 24DR32.5 30DR26 N/A N/A

24B175 24DR32.5 30DR26 N/A N/A

24C175 24DR32.5 30DR26 N/A N/A

24D175 24DR32.5 30DR26 N/A N/A

24B200 24DR32.5 30DR21 N/A N/A

24C200 24DR32.5 30DR21 N/A N/A

24B225 24DR32.5 30DR21 N/A N/A

24C225 24DR32.5 30DR21 N/A N/A

24B250 24DR32.5 30DR19 N/A N/A

24C250 24DR32.5 30DR19 N/A N/A

24B275 24DR32.5 30DR17 N/A N/A

24B300 24DR25 30DR15.5 N/A N/A

24C300 24DR25 30DR15.5 N/A N/A

24D300 24DR25 30DR15.5 N/A N/A

24B325 24DR25 30DR13.5 N/A N/A

24C325 24DR25 30DR13.5 N/A N/A

24B350 24DR25 30DR13.5 N/A N/A

24C350 24DR25 30DR13.5 N/A N/A

24B375 24DR25 30DR11 N/A N/A

24C375 24DR25 30DR11 N/A N/A

24B400 24DR21 30DR11 N/A N/A

24C400 24DR21 30DR11 N/A N/A

24D400 24DR21 30DR11 N/A N/A

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Table 33 11 10A- Symbol Pipe Equivalents Symbol Pipe Designation PVC HDPE Steel Ductile Iron

24B425 24DR21 30DR11 N/A N/A

24C425 24DR21 30DR11 N/A N/A

24B450 24DR21 30DR11 N/A N/A

24C450 24DR21 30DR11 N/A N/A

24B475 24DR18 30DR9 N/A N/A

24C475 24DR18 30DR9 N/A N/A

24D475 24DR18 30DR9 N/A N/A

24B500 24DR18 30DR9 N/A N/A

24C500 24DR18 30DR9 N/A N/A

24D500 24DR18 30DR9 N/A N/A

24B525 24DR18 30DR9 N/A N/A

24C525 24DR18 30DR9 N/A N/A

24D525 24DR18 30DR9 N/A N/A

24C540 24DR18 30DR9 N/A N/A

24B550 N/A 30DR9 24 inches - 0.103 inches 24DIOD250

24B575 N/A 30DR9 24 inches - 0.125 inches 24DIOD250

24B600 N/A N/A 24 inches - 0.125 inches 24DIOD300

24C600 N/A N/A 24 inches - 0.125 inches 24DIOD300

24D600 N/A N/A 24 inches - 0.125 inches 24DIOD300

24B625 N/A N/A 24 inches - 0.125 inches 24DIOD300

24C625 N/A N/A 24 inches - 0.125 inches 24DIOD300

24B650 N/A N/A 24 inches - 0.125 inches 24DIOD300

24C650 N/A N/A 24 inches - 0.125 inches 24DIOD300

24C675 N/A N/A 24 inches - 0.125 inches 24DIOD300

24D675 N/A N/A 24 inches - 0.125 inches 24DIOD300

Fiberglass pipe: Submit in accordance with Section 33 11 19 - Fiberglass Pipe.

N/A indicates that the particular pipe option is not allowed.

1.03 REFERENCE STANDARDS

A. ASTM International (ASTM)

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1. ASTM C150/C150M-13 Portland Cement

2. ASTM F2164-13 Field Leak Testing of Polyethylene (PE) and Crosslinked Polyethylene (PEX) Pressure Piping Systems Using Hydrostatic Pressure

B. American Water Works Association (AWWA)

1. AWWA C205-12 Cement-Mortar Protective Lining and Coating for Steel Water Pipe - 4 in. (100

mm) and Larger - Shop Applied

2. AWWA C207-13 Steel Pipe Flanges for Waterworks Service Sizes 4 In. Through 144 in. (100 mm Through 3,600mm)

3. AWWA C600-10 Installation of Ductile Iron Water Mains and Their Appurtenances

4. AWWA C604-11 Installation of Steel Water Pipe 4 in.

(100mm) and Larger

5. AWWA C605-13 Underground Installation of Polyvinyl Chloride (PVC) and Molecularly Oriented Polyvinyl Chloride (PVCO) Pressure Pipe and Fittings

6. AWWA C900-07 Polyvinyl Chloride (PVC) Pressure Pipe and Fabricated Fittings, 4 In. Through 12 In.

(100 mm Through 300 mm), for Water Transmission and Distribution

7. AWWA C905-10 Polyvinyl Chloride (PVC) Pressure Pipe and Fabricated Fittings, 14 Inches through 48 Inches (350 mm Through 1,200 mm) for Water Transmission and Distribution

8. AWWA C906-15 Polyethylene (PE) Pressure Pipe and Fittings, 4 In. Through 65 In. (100 mm Through 1,650 mm), for Waterworks

9. AWWA C950-13 Fiberglass Pressure Pipe

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C. International Organization for Standardization (ISO)

1. ISO 9001-15 Quality Management

D. National Sanitation Foundation (NSF)

1. NSF Standard 61-13 Drinking Water System Components - Health Effects

1.04 SUBMITTALS

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

B. RSN 33 11 10-1, Qualifications:

1. Resumes and references of line pipe manufacturers.

2. Pipe fuser certifications, if needed, for equipment to be used.

C. RSN 33 11 10-2, Pipelaying Diagrams:

1. For each type of pipe furnished.

2. Show position and marking of pipe sections.

3. Include centerline and invert stationing and elevations at horizontal and vertical changes in alignment, and subgrade elevation for each pipe fitting.

D. RSN 33 11 10-3, Filling and Testing Plan:

1. Proposed rate, time, and procedure for:

a. Cleaning.

b. Filling.

c. Field and pressure testing.

d. Draining pipeline.

2. Method of disposing of water drained from pipeline.

E. RSN 33 11 10-4, Floatation Prevention Plan:

1. Show location and describe method of preventing pipe from floating.

1.05 DELIVERY, STORAGE AND HANDLING

A. Place pipe in storage as directed by COR. Within 150 miles from site, as designated by

COR.

1.06 REPAIR KIT

A. Furnish 1 repair kit for each type and size of pipe used.

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B. Repair kit:

1. One standard length of pipe and 2 couplings.

2. At highest loading and pressure rating for each type of pipe used.

1.07 QUALIFICATIONS

A. Pipe manufacturer:

1. Certified in accordance with ISO 9001 or similar nationally certified quality program as approved by COR.

2. At least 10 years of successful experience producing products as specified.

3. Provide references for at least 3 completed projects with proposed pipe products between 18-inch and 36-inch diameter and pressure classes above 100 psi.

B. Welding procedures and welders in accordance with AWS D1.1 as applicable

C. Pipelaying Workers: Skilled and experienced in laying pipe with type of pipe and joint being furnished.

PART 2 PRODUCTS

2.01 PIPE CROSSINGS

A. See Section 33 11 50 - Pipe Crossings at Existing Utility Pipelines.

2.02 GENERAL

A. Confirm elevations and locations shown on drawings with COR prior to ordering pipeline materials.

2.03 PIPE OPTIONS

A. Listed in Table 33 11 10A-Symbol Pipe Equivalents and following sections:

1. 33 11 12 - Steel Line Pipe,

2. 33 11 13 - Ductile Iron Pipe,

3. 33 11 16 - PVC Pressure Pipe,

4. 33 11 18 - HDPE Pressure Pipe,

5. 33 11 19 - Fiberglass Pipe.

B. Materials and chemicals that may come into contact with drinking water certified by

NSF 61.

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2.04 PIPE ACCESSORIES

A. Two Inch Diameter Air Valve Assemblies: See Section 33 12 10 - Valves and Equipment for Line Pipe Installations.

B. Four Inch Diameter Blowoff Assemblies: See Section 33 12 10 - Valves and Equipment for Line Pipe Installations.

PART 3 EXECUTION

3.01 GENERAL

A. Perform cleaning, filling and testing after backfill has been placed to finished grade or as approved by COR.

B. Surveyor licensed in the State of New Mexico shall be on site during excavation and pipelaying.

C. Protect pipe from contamination, damage, and the elements during storage on site by covering it with a tarp as directed by the COR.

3.02 INSTALLATION

A. Install pipe in accordance with appropriate Section for pipe option installed.

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

C. Keep openings to installed pipe closed with watertight plugs during work stoppage, including end of work day, breaks, work delays.

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

E. If pipe is flooded during construction, clear floodwater by draining and flushing with water, or other approved method, until pipe is clean.

F. Lubricant:

1. Keep clean.

2. Apply with dedicated, clean applicator brushes.

G. Concrete in encasements, blocking and collars: Section 03 30 00 - Cast-in-Place Concrete.

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H. Wash Crossings:

1. Pipe joints to be fused or restrained from beginning to end of Wash Crossing stationing. See Section 35 42 35 - Bank Protection and drawings for locations.

3.03 FIELD EXAMINATION

A. Flush pipe before filling.

1. Flush foreign material from pipeline prior to testing.

2. Flush using a minimum velocity of 3 feet per second toward low points in reach.

3. Flush at least 3 pipe volumes until the water is clean as approved by COR.

4. Dispose of flush water in accordance with permits in Section 01 57 30 - Water Pollution Control.

5. Operate valves several times during flushing period.

3.04 FILLING PIPELINE

A. Provide water for filling and testing pipeline in accordance with Section 01 51 00 - Temporary Utilities.

B. Pipeline fill rate, maximum: 2 cubic feet per second.

C. Maintain pipeline completely filled for at least 72 hours before testing.

3.05 CONTRACTOR FIELD QUALITY TESTING

A. Leak testing pipeline:

1. Notify the COR at least 7 days before applying pressure to pipeline.

2. Do not start leak testing when snow or standing water is on the ground. Suspend testing as directed by the COR if precipitation accumulates on the ground.

3. Furnish pumps, power, pressure gages, air valves at each end of line and calibrated flow meters for testing.

4. Comply with applicable test standard except as noted below:

a. AWWA C605 for PVC.

b. ASTM F2164 for HDPE.

5. Test pipeline with hydrostatic pressure equal to:

a. 420 feet elevation downstream of Pre-manufactured Pump Station No. 1.

b. 460 feet elevation downstream of Pre-manufactured Pump Station No. 2.

6. Prior to starting test, maintain pressure in pipe for 24 hours.

7. Test for 96 hours or as approved by COR.

8. If leakage is detected, halt test. Identify and repair leaks.

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9. Repeat test until acceptance criteria is achieved.

10. Drain pipe using both gravity flow and sump pump at blowoffs or as approved by

COR.

11. Repeat field examination as detailed above.

12. Seal openings to pipe as approved by COR.

END OF SECTION

PVC Pressure Pipe

33 11 16 - 1

SECTION 33 11 16

PVC PRESSURE PIPE

PART 1 GENERAL

1.01 MEASUREMENT AND PAYMENT

A. Cost:

1. Include in the price in the Price Schedule for Line Pipe.

1.02 REFERENCE STANDARDS

A. ASTM International (ASTM)

1. ASTM A36/A36M-14 Carbon Structural Steel

2. ASTM A283/A283M-13 Low and Intermediate Tensile Strength Carbon Steel Plates

3. ASTM E165/E165M-12 Liquid Penetrant Examination for General Industry

4. ASTM F1674-11 Joint Restraint Products for Use with PVC Pipe

B. American Welding Society (AWS)

1. AWS D1.1/D1.1M-15 Structural Welding Code - Steel

C. American Water Works Association (AWWA)

1. AWWA C110-12 Ductile-Iron and Gray-Iron Fittings

2. AWWA C153-11 Ductile-Iron Compact Fittings

3. AWWA C208-12 Dimensions for Fabricated Steel Water Pipe Fittings

4. AWWA C223-13 Fabricated Steel and Stainless Steel Tapping Sleeves

5. AWWA C605-13 Underground Installation of Polyvinyl Chloride (PVC) and Molecularly Oriented Polyvinyl Chloride (PVCO) Pressure Pipe and Fittings

6. AWWA C800-14 Underground Service Line Valves and Fittings

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7. AWWA C905-10 Polyvinyl Chloride (PVC) Pressure Pipe and Fabricated Fittings, 14 in. Through 48 in.

(350 mm Through 1,200 mm), for Water Transmission and Distribution

1.03 SUBMITTALS

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

B. RSN 33 11 16-1, Shop Drawings:

1. Show fitting fabrication details. Include: miter bend fabrication details (angles, leg lengths), restrained lengths, inside pipe diameters.

2. Dimensions of joints, diameter of rubber gasket including tolerances, other major dimensions, proposed restraint, and location which include station and elevation.

3. Connections details to other pipe types.

C. RSN 33 11 16-2, Pipe Manufacture Certification:

1. Pipe and miter bends meet AWWA C905.

2. Saddle and Sleeve product data.

D. RSN 33 11 16-3, Test Results:

1. Manufacturer’s steel fitting test results.

1.04 QUALIFICATIONS

A. See 33 11 10 - Pipeline General Requirements.

1.05 DELIVERY, STORAGE, AND HANDLING

A. Ship pipe after receiving COR approval of pipe manufacture per submittal.

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

C. Transport coated fittings with padded bolsters between the pipes. Use heavy padding under ties.

D. Provide sun protection for PVC pipe that is stored outside.

1. At a minimum, wrap pipe in an adequately fastened opaque covering.

a. In warm climates, allow air circulation through and around the pipe by puncturing or cutting the covering in the area of the pipe ends.

E. Support and store pipe above ground surface. Do not allow bells and spigots to contact each other or the ground.

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PART 2 PRODUCTS

2.01 PIPE

A. PVC Pressure Pipe: AWWA C905, elastomeric joint only.

1. Nominal laying length: 20 feet.

2. PVC pipe dimension ratios (DR) shown on the plan and profile drawings are based on AWWA Cast Iron (CI) sizes for diameters.

B. Rubber Gaskets: Manufactured and tested in accordance with AWWA C905.

1. Petroleum-resistant gaskets: Use in pipe joints in accordance with Section 33 05 21 - Bored Utility Crossings.

2. Lubricant: Approved for potable water use.

2.02 FITTINGS

A. Tees, adaptors, couplings, bends, and connections at structures and encasements: As shown on drawings.

B. Fittings: Steel or ductile iron.

C. Steel Fittings:

1. Steel for fittings: ASTM A283, grade C or D or ASTM A36.

2. Minimum steel wall thickness: 10 gauge or greater.

3. Welding:

a. AWS D1.1.

b. Temporary or permanent welding for convenience of the Contractor: Not permitted on areas where welding will damage fusion-epoxy lining and coating.

c. Lifting eyes and other handling devices: Made part of fitting before lining and coating are applied.

4. Coatings and Linings: In accordance with Section 09 96 02 - Coatings.

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5. Joints between fittings and PVC pressure pipe:

a. Rubber gasket joints.

b. Joint dimensions and tolerances: Same as PVC pipe manufacturer's joint design.

c. Joint Restraint Products: ASTM F1674.

6. In accordance with AWWA C208.

D. Ductile Iron Fittings:

1. AWWA C110 or AWWA C153.

2. Coatings and Linings: In accordance with Section 09 96 02 - Coatings.

3. Joints between fittings and PVC pressure pipe:

a. Rubber gasket joints.

b. Joint dimensions and tolerances: Same as PVC pipe manufacturer's joint design.

4. Joint Restraint Products: ASTM F1674:

a. Between pipe sections:

1) Megalug Series 3800, EBAA Iron Sales, Incorporated, P.O. Box 857, Eastland TX 76448, telephone: 800-433- 1716, http://www.ebaa.com or equivalent.

b. Between pipe and fittings:

1) Megalug Series 2000PV, EBAA Iron Sales, Incorporated, P.O.

Box 857, Eastland TX 76448, telephone: 800-433- 1716, http://www.ebaa.com or equivalent.

c. Do not exceed manufactures pressure ratings.

E. Tapping Saddles:

1. AWWA C800.

2. Provide threaded outlet to match remaining 2 inch air valve assembly.

3. NSF/ANSI 61 Compliant.

F. Tapping Sleeves:

1. AWWA C223.

2. Provide tapping flange to match remaining 4 inch blowoff assembly.

3. NSF/ANSI 61 Compliant.

G. Restrained PVC pipe joints

1. Between pipe sections:

http://www.ebaa.com/

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a. Megalug Series 2800, EBAA Iron Sales, Incorporated, P.O. Box 857, Eastland TX 76448, telephone: 800-433-1716, http://www.ebaa.com or equivalent

b. Do not exceed manufactures pressure ratings.

2.03 CONCRETE

A. Concrete in encasements, blocking and collars in accordance with Section 03 30 00 - Cast-in-Place Concrete.

2.04 CONTRACTOR SOURCE QUALITY TESTING

A. Steel Fittings:

1. Testing:

a. Hydrostatic test fittings fabricated from steel plate.

1) Hydrostatic pressure: Sufficient to stress steel to 75 percent of minimum yield point of steel.

2) Hold pressure long enough to allow inspection of welded joints.

3) Repair leaks by rewelding and retesting of joints.

b. Fittings fabricated from tested steel pipe do not require hydrostatic testing if girth butt welds are complete penetration welds.

1) Girth weld test: Dye penetrant test welds in accordance with

ASTM E165.

2) Repair weld defect: Chip, flame gouge, or grind to sound metal;

reweld resulting cavities; and retest.

B. Ductile Iron Fittings: Test in accordance with AWWA C110 or AWWA C153.

PART 3 EXECUTION

3.01 LAYING PIPE

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

B. Excavate pipe trench in accordance with Section 31 23 22 - Pipe Trench Earthwork.

1. Grade pipe trenches to provide uniform slope along bottom of pipe.

2. At joints involving bells or collars, provide holes at joint of ample size to prevent bells or collars from coming in contact with subgrade.

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

C. On grades exceeding 10 percent, lay pipe uphill.

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D. Before Assembling Pipe Joints:

1. Clean gasket, bell, and spigot with a rag, brush, or paper towel to remove any foreign material.

2. Apply lubricant as specified by pipe manufacturer:

a. Use only lubricant supplied by the pipe manufacturer.

b. Lubricate spigot end of pipe as recommended by the manufacturer.

c. Do not lubricate either the gasket or gasket groove in bells where gaskets are field installed.

d. Lubricate factory-installed, nonremovable-type gaskets as recommended by the pipe manufacturer.

E. Joining Pipe:

1. Join pipe in accordance with AWWA C605 or as directed by COR.

2. Align spigot to bell, and insert spigot into bell until spigot contacts gasket uniformly.

3. Apply firm, steady pressure either by hand or by using bar and block until spigot easily slips through gasket.

a. Mechanical equipment such as come-alongs may also be used to join pipe.

b. Do not damage pipe during joint assembly.

4. Push spigot until reference mark on spigot end is flush with bell end.

a. Spigot end of pipe: Marked by manufacturer to indicate proper depth of insertion.

5. Do not swing or "stab" the joint. Do not suspend pipe and swing into the bell.

6. If adjustment of the position of a length of pipe is required after installation, remove and relay the length of pipe as for a new pipe.

F. Changes in Alignment and Grade:

1. Where shown as miter bends on drawings, make changes in alignment and grade with steel or ductile-iron miter bends.

2. Cathodically protect metallic miter bends and/or metallic restraint joints.

3. Make other changes in alignment and grade by providing deflections at joints.

a. Maximum deflection: 1 degree or deflection recommended by pipe manufacturer, whichever is less.

4. Longitudinal bending of pipe to obtain deflection: Not permitted.

5. Other methods of providing curves in pipelines may be submitted; and if approved, use these methods to install curves at no additional cost to the Government.

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a. Methods of providing curves in pipelines which incorporate rubber gasket joints encased in concrete will not be approved.

G. Connections Between PVC Pressure Pipe and Other Types of Pipe:

1. Use rubber gasketed mechanical joints to make connections between PVC pressure pipe and other types of pipe.

H. Schedule work so that at no time will pipe remain in the trench more than 7 days before backfill is placed to original ground surface or to other specified backfill limits shown on drawings.

I. Thrust Restraint:

1. Joint restraint products or other restraint method at miter bends as shown on drawing 1695-D-60049.

a. Other methods of restraint may be used as approved by COR.

b. Coat in accordance with Section 09 96 20 - Coatings.

J. Backfill pipe in accordance with Section 31 23 22 - Pipe Trench Earthwork.

1. Place backfill about pipe carefully to avoid lateral displacement of the pipe and damage to joints.

2. In certain pipeline reaches, where determined necessary by the COR to prevent the possibility of flotation, do not lay more than 300 linear feet of pipe ahead of backfilling operations.

3. If pipelaying operations are interrupted for more than 24 hours, cover pipe laid in the trench with backfill.

3.02 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.

3.03 PIPE DEFLECTION

A. Allowable vertical pipe diameter deflection after backfilling is complete:

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

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

B. Within 2 weeks after backfilling is completed, take measurements of internal diameters.

C. Measurement Frequency:

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1. One pipe unit out of 3 for the first 30 units laid and 1 pipe unit out of 10 thereafter.

2. In areas of deep burial or where special problems are encountered, the frequency of measurements may be increased at the discretion of the COR.

D. Measurements:

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

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

3. Mark inside of pipe so that future comparisons can be made.

E. If a pipe unit deflection exceeds the allowable:

1. Take measurements in adjacent pipe units to determine extent of excessive deflection.

2. Provide deflection data to the COR.

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

HDPE Pressure Pipe

33 11 18 - 1

SECTION 33 11 18

HDPE PRESSURE PIPE

PART 1 GENERAL

1.01 MEASUREMENT AND PAYMENT

A. Cost:

1. Include in the price in the Price Schedule for Line Pipe.

1.02 REFERENCE STANDARDS

A. American Society of Mechanical Engineers (ASME)

1. ASME B16.1-10 Gray Iron Pipe Flanges and Flanged Fittings: Classes 25, 125, and 250

2. ASME B16.5-13 Pipe Flanges and Flanged Fittings: NPS 1/2 through NPS 24 Metric/Inch Standard

B. ASTM International (ASTM)

1. ASTM A36/A36M-14 Carbon Structural Steel

2. ASTM A283/A283M-13 Low and Intermediate Tensile Strength Carbon Steel Plates

3. ASTM D2513-14 Polyethylene (PE) Gas Pressure Pipe, Tubing, and Fittings

4. ASTM D3350-14 Polyethylene Plastics Pipe and Fittings

5. ASTM E165/E165M-12 Liquid Penetrant Examination for General Industry

6. ASTM F714-13 Polyethylene (PE) Plastic Pipe (DR-PR) Based on Outside Diameter

7. ASTM F2206-14 Fabricated Fittings of Butt-Fused Polyethylene (PE)

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

9. ASTM F2634-15 Laboratory Testing of Polyethylene (PE) Butt Fusion Joints using Tensile-Impact Method

C. American Welding Society (AWS)

1. AWS D1.1/D1.1M-15 Structural Welding Code - Steel

33 11 18 - 2

D. American Water Works Association (AWWA)

1. AWWA C600-10 Installation of Ductile Iron Water Mains and Their Appurtenances

2. AWWA C906-15 Polyethylene (PE) Pressure Pipe and Fittings, 4 In. Through 65 In. (100 mm Through 1,650 mm), for Waterworks

E. Plastic Pipe Institute (PPI)

1. TR-33-12 Generic Butt Fusion Joint Procedure for Field Joint of Polyethylene Pipe

1.03 SUBMITTALS

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

B. RSN 33 11 18-1, Heat Fusion Joint Operator Qualifications:

1. Certifications from manufacturer.

2. Inspection results.

3. Date of Certification.

C. RSN 33 11 18-2, Shop Drawings:

1. Show fitting fabrication details such as dimensions and location which includes station and elevation.

2. Connections details to other pipe types.

D. RSN 33 11 18-3, Certification:

1. Pipe meets AWWA C906.

2. Test reports correlated to shipping bills.

E. RSN 33 11 18-4, Fusion Procedures:

1. Fusion temperature.

2. Interface pressure.

3. Cooling time.

4. Record of pipe size and DR being joined and each joints fusion temperature, interface pressure and cooling time.

33 11 18 - 3

1.04 QUALIFICATIONS

A. Heat Fusion Joint Machine Operator:

1. Certified by machine manufacturer or representative.

2. Trained on specific fusion machine and bonding procedure and shall:

a. Perform 1 pipe-to-pipe bond and,

b. One pipe-to-fitting bond on each machine to be used.

c. Bonds made as part of operator certification shall be:

1) Visually inspected and tested in accordance with PPI and ASTM standards.

3. Qualification remain in effect for 6 months from date of qualification.

a. Ability to be revoked by certifying entity.

1.05 DELIVERY, STORAGE, AND HANDLING

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

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

C. Support and store pipe above ground surface.

PART 2 PRODUCTS

2.01 PIPE

A. HDPE Pressure Pipe: AWWA C906, except;

1. PE material:

a. Standard PE code designation: PE 4710.

b. Minimum cell Classification, ASTM D3350: PE 445574C, or E.

2. Each production lot of pipe shall be tested for melt index, density, percent carbon, dimensions and ring tensile strength.

3. Approved for potable water in accordance with NSF Standard 61.

4. Not less than 4 permanent co-extruded, equally spaced, blue color stripes in outside surface of pipe.

2.02 FITTINGS

A. Adaptors, couplings, bends, and connections at structures and encasements: Fabricated from HDPE unless otherwise specified, or as shown on drawings.

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B. Metal Back-up Flange:

1. Material: Ductile iron, Class 150, ASME B16.1 or ASME B16.5, coat in accordance with Section 09 96 02 - Coatings.

C. Steel Fittings:

1. Steel for Fittings: ASTM A283, grade C or D; or ASTM A36.

2. Minimum Steel Wall Thickness: 10 gauge or greater.

3. Welding:

a. AWS D1.1.

b. Temporary or permanent welding for convenience of Contractor: Not permitted on areas where welding will damage fusion-epoxy lining and coating.

c. Lifting eyes and other handling devices: Made part of fitting before lining and coating are applied.

4. Coatings and Linings:

a. Fusion epoxy or coal-tar epoxy paint in accordance with Section 09 96 02 - Coatings.

D. HDPE Pipe Fittings:

1. Molded fittings constructed of HDPE PE 4710 in accordance with ASTM F714 and ASTM F2206.

2. Made by heat fusion joining specially machined shapes cut from pipe, polyethylene sheet stock or molded fittings;

a. Rated for internal pressure service at least equal to full service pressure rating of mating pipe.

b. Tested in accordance with AWWA C906.

3. HDPE flange and mechanical joint adaptors shall be rated to at least the same pressure as mating pipe.

4. Polyethylene flange or mechanical joint adapters made with sufficient through-bore to be clamped in a butt fusion-joining machine without use of a stub-end holder, as per pipe manufacturer’s instructions.

5. HDPE fabricated mechanical adapters shall have steel stiffeners.

2.03 CONCRETE

A. Concrete in encasements, blocking and collars: Section 03 30 00 - Cast-in-Place Concrete.

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2.04 CONTRACTOR SOURCE QUALITY TESTING

A. HDPE Pipe and Fittings:

1. General: AWWA C906 testing of HDPE pipe and fittings and ASTM F2634 testing of HDPE factory test fusions.

a. Completed and documented by qualified personnel.

b. Government reserves right to:

1) Observe testing while in process and to receive testing documentation.

2) Inspect materials both during and after manufacture.

c. Testing reports shall have unique identifiers with shipping bills to verify that pieces shipped belong to same as those tested.

2. Test in accordance with AWWA C906 and/or ASTM F714.

a. Perform 1 butt fusion in accordance with ASTM F2620 and PPI Technical Report TR-33 on each run of pipe and from each batch of material feedstock.

1) Test using Tensile Impact Test in accordance with ASTM F2634 prior to shipping pipe.

b. Joints exhibiting yield point lower than unfused pipe or that fails in a brittle mode is considered unacceptable.

c. Unacceptable test result, Government may reject pipe manufactured in same run and from same batch of material feedstock represented by unacceptable test. Manufacturer may, at own expense, supply additional testing to COR.

d. Acceptable test results do not:

1) Mean that pipe from pipe run or material feedstock batch will be acceptable.

2) Relieve pipe manufacturer or supplier from liability for defects in material or workmanship of pipe discovered during installation or warrantee period.

3. HDPE pipe out-of-roundness tolerances shall not exceed maximum allowances in ASTM D2513, Table 2.

a. HDPE pipe ovality: plus or minus 3 percent at pipe manufacturing facility.

B. HDPE Fittings:

1. Each fitting to be five-second pressured tested in accordance with AWWA C906.

C. Steel Fittings:

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1. Hydrostatic test fittings fabricated from steel plate.

a. Hydrostatic test for pipe and fittings: Stresses steel to 75 percent of minimum yield point of steel.

b. Inspect welded joints during test.

c. Repair leaks by rewelding and retesting of joints.

2. Girth Weld Test:

a. Testing not required if girth butt welds are complete penetration welds.

b. Dye penetrant test welds in accordance with ASTM E165.

c. Weld defect repair: Chip, flame gouge, or grind to sound metal; reweld and retest weld.

PART 3 EXECUTION

3.01 LAYING PIPE

A. Excavate pipe trench in accordance with Section 31 23 22 - Pipe Trench Earthwork.

1. Grade pipe trenches to provide uniform slope along bottom of pipe.

2. At joints involving flanges, provide holes at joint to prevent flanges from coming in contact with subgrade.

B. Joining Pipe:

1. HDPE pipe butt fusions: In accordance with PPI Technical Report TR-33 (TR- 33-12) and ASTM F2620.

2. Pipe may be joined above ground and then lowered into position, provided pipe is supported and handled in a manner that prevents damage.

3. Connections between HDPE pressure pipe and other types of pipe: as shown on drawings.

4. Tied Joint Restraint System:

a. Clean surfaces of pipe and fittings to receive tied joint restraint system.

b. In accordance with AWWA C600.

c. Install joint restraint system so joints are mechanically locked together to prevent joint separation.

5. Saddle Fittings: Fusion weld saddle fittings to pipe in accordance with ASTM F2620.

6. Polyethylene Pipe Fusion Machine Data Loggers:

a. Used during joint fusions.

b. Record:

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1) Joint temperature,

2) Pressure,

3) Time.

c. Supply data on fusion joints upon request of COR.

7. Thermal Contraction and Expansion of HDPE Pipe:

a. COR may unbolt flange at transition between HDPE and steel to check for tensile or compressive loading due to thermal contraction of the HDPE pipe.

b. Excessive tension or excessive compression of flange shall be cause for Contractor to excavate HDPE pipe, lengthen or shorten and re-bury at own cost.

C. Changes in Alignment and Grade:

1. Where shown as miter bends on drawings, make changes in alignment and grade with miter bends or submit proposal to COR for approval.

2. Make other changes in alignment and grade by bending pipe.

a. Minimum cold (field) bend radius shown in Table 33 11 18A - Minimum Cold Bending Radius.

Table 33 11 18A - Minimum Cold Bending Radius

Pipe DR Minimum Cold Bending Radius

≤ 9 20 times pipe OD

>9 to 13.5 25 times pipe OD

>13.5 to 21 27 times Pipe OD

>21 30 times pipe OD

Fitting or flange present or to be installed in bend

100 times pipe OD

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

E. Closure sections:

1. Last fusion joint for HDPE pipe to HDPE pipe closure sections:

a. Make during the coolest part of the day.

33 11 18 - 8

b. Air temperature, maximum: 65 degrees F.

F. Pipe will remain in the trench no more than 7 days before backfill is placed to original ground surface or to other specified backfill limits shown on drawings.

G. Backfill pipe in accordance with Section 31 23 22 - Pipe Trench Earthwork.

3.02 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.

3.03 CONTRACTOR FIELD QUALITY TESTING

A. Fusion Quality Testing on Polyethylene pipe:

1. Frequency:

a. Minimum: 1 per crew per week or at request of COR.

b. Maximum: 10 percent of welds.

c. Additional testing may be required during changes in:

1) Weather.

2) Fusion machine.

3) Fusion crew.

2. Procedure:

a. Cool trial fusion, then.

1) Cut out test coupons.

2) Test using Tensile Impact Method accordance with ASTM F2634.

3. Rejection of Fusion Joints:

a. Exhibits a yield point lower than unfused pipe or,

b. Fails in brittle mode.

c. Field fusions represented by trial fusion shall be rejected.

1) Make corrections at Contractor expense and re-make rejected fusions.

B. Test field welds on steel pipe and fittings using ultrasonic or radiographic method in accordance with AWS D1.1.

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Fiberglass Pipe

33 11 19 - 1

SECTION 33 11 19

FIBERGLASS PIPE

PART 1 GENERAL

1.01 MEASUREMENT AND PAYMENT

A. Cost:

1. Include in the price in the Price Schedule for Line Pipe.

1.02 REFERENCE STANDARDS

A. American Society of Mechanical Engineers (ASME)

1. ASME B18.2.1-10 Square and Hex Bolts and Screws, Inch Series

B. ASTM International (ASTM)

1. ASTM A36/A36M-12 Carbon Structural Steel

2. ASTM A283/A283M-12a Low and Intermediate Tensile Strength Carbon Steel Plates

3. ASTM D3517-11 Fiberglass (Glass-Fiber-Reinforced Thermosetting-Resin) Pressure Pipe

4. ASTM D4161-01(2010) Fiberglass (Glass-Fiber-Reinforcing Thermosetting-Resin) Pipe Joints Using Flexible Elastomeric Seals

5. ASTM D5685-11 Standard Specification for Fiberglass (Glass-Fiber-Reinforced Thermosetting- Resin) Pressure Pipe Fittings

6. ASTM F477-10 Specification for Elastomeric Seals (Gaskets) for Joining Plastic Pipe

7. ASTM E165-12 Liquid Penetrant Examination

C. American Water Works Association (AWWA)

1. AWWA C110-12 Ductile-Iron and Gray-Iron Fittings for Water

2. AWWA C153-11 Ductile-Iron Compact Fittings for Water Service

3. AWWA C950-13 Fiberglass Pressure Pipe

4. AWWA M45-05 Fiberglass Pipe Design

33 11 19 - 2

D. American Welding Society, Inc. (AWS)

1. AWS D1.1/D1.1M-08 Structural Welding Code - Steel

2. AWS D1.4/D1.4M-11 Structural Welding Code Reinforcing Steel

E. Federal Specifications (FED-STD)

1. FED-STD FF-N-836E Nut, Square, Hexagon, Cap, Slotted, Castle, Knurled, Welding and Single Ball Seat, February 14, 1994

F. International Organization for Standardization

1. ISO 9001-08 Quality Management Systems - Requirements

1.03 SUBMITTALS

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

B. RSN 33 11 19-1, Shop Drawings:

1. Show fitting fabrication details.

2. Show exact dimensions of joints, and diameter of rubber gasket including tolerances, and other major dimensions.

C. RSN 33 11 19-2, Joint Repair Plan:

1. Proposed equipment, materials, and procedures for repairing leaks in pipe joints.

D. RSN 33 11 19-3, Qualifications:

1. Pipe manufacturer:

a. ISO 9001 or similar nationally certified quality program certification.

b. At least 10 years of successful experience producing products as specified.

c. References for at least 3 completed projects with fiberglass pressure pipe between 18 to 36 inches and pressure classes above 100 psi.

1.04 QUALIFICATIONS

A. See 33 11 10 - Pipeline General Requirements.

1.05 DELIVERY, STORAGE AND HANDLING

A. Prevent damage to pipe and fittings during loading, transporting, unloading, storage, and installation.

B. Package, handle, and ship in accordance with manufacturer’s recommendations.

33 11 19 - 3

C. Transport pipe and fittings on padded bolsters either curved to fit the outside of the pipe or using triangular chocks. Use heavy padding under ties.

D. Support and store pipe above ground surface. Do not allow bells, couplings or spigots to contact each other or the ground.

E. Use manufacturer’s instructions for handling of pipe.

F. Replace or repair, as approved by the COR, pipe that is damaged during shipment, storage, or installation at the Contractor’s expense.

PART 2 PRODUCTS

2.01 PIPE

A. Fiberglass Pipe: In accordance with AWWA C950 and ASTM D3517.

1. Pressure pipe utilizing a continuous filament wound process with:

a. Type 1: glass fiber-reinforced thermosetting polyester resin mortar.

b. Liner 1: reinforced thermoset liner.

c. Grade 1: polyester resin surface layer - reinforced.

d. Class: see Table 33 11 10A - Symbol Pipe Equivalents for required line pipe sizes and pressure classes.

e. Pipe Stiffness: 18 psi minimum.

B. Design pipe for the maximum sustained working pressure and the surge pressure.

1. The maximum sustained and surge pressures are considered the same and are defined by the head classes shown on pipeline plan and profile drawings.

C. Elastomeric Sealing Gaskets: Manufactured and tested in accordance with ASTM F477.

2.02 FITTINGS

A. Tees, bends, adapters, and connections at structures and encasements:

1. As shown on drawings.

2. Fittings should resist the same loading conditions as the adjacent pipe.

B. Fittings: Fabricated from fiberglass, steel or ductile iron.

1. Fiberglass Fittings: In accordance with AWWA M45, AWWA C950, and ASTM D3517.

a. Installed in accordance with manufacture’s recommendations.

2. Steel Fittings:

33 11 19 - 4

a. Steel for Fittings: ASTM A283, grade C or D or ASTM A36.

b. Minimum steel wall thickness: 0.25 inches or thickness required to meet pipe classification shown on the plan and profile, whichever is greater.

c. Pipe Diameter: Pipe inside diameter measured to the inside of the lining shall not be less than the nominal diameter shown on the drawings.

d. Welding:

1) AWS D1.1.

2) Lifting eyes and other handling devices: Made part of fitting before lining and coating are applied.

3) Temporary or permanent welding for convenience of the Contractor: Not permitted on areas where welding will damage fusion-epoxy lining and coating.

e. Bolts and Nuts: ASME B18.2.1 and FED-STD FF-N-836.

f. Coating and lining in accordance with Section 09 96 20 - Coatings.

g. Tees:

1) Tees as shown on drawings.

2) Tee lengths, minimum: As shown on drawings or as required for blocking.

h. Miter bends: Fabricate steel bends as shown on drawings.

i. Closure Section Joints: Sleeve coupling.

3. Ductile Iron Fittings:

a. AWWA C110 or AWWA C153.

1) Match pipe pressure class.

2) Flanges: AWWA C110 or AWWA C153.

3) Bolts: AWWA C110 or AWWA C153.

4) Gaskets: AWWA C110 or AWWA C153.

b. Coatings and lining:

1) Refer to Section 09 96 20 - Coatings.

c. Plan, profile and restraint system shown on drawings shall require modification if ductile iron fittings are used.

d. Submit plan, profile, restraint system, details and connections for COR review and approval.

e. Joints between fittings and ductile iron pipe.

1) Rubber gasket joints.

33 11 19 - 5

2) Joint dimensions and tolerances: Same as pipe manufacturer's joint design.

2.03 FABRICATION

Deleted

2.04 CONCRETE

A. Concrete in Encasements, Blocking and Collars: Section 03 33 00 - Cast-in-Place Concrete.

B. Other methods of restraint may be used as approved by the COR.

C. Plan, profile and restraint system shown on drawings require modification if alternate methods are used.

2.05 CONTRACTOR SOURCE QUALITY TESTING

A. Fiberglass Pipe:

1. Test in accordance with AWWA C950 and ASTM D3517.

B. Fiberglass Fittings:

1. Hydrostatic test in accordance with ASTM D5685 except

a. Each fiberglass fitting shall be hydrostatically factory tested.

b. Follow the requirements and methods of the Short-Term Hydrostatic

Strength Test, 7.4.1.

2. Use a fiberglass reinforcement collar connection for blowoffs.

C. Steel Fittings, testing:

1. Hydrostatic test fittings fabricated from steel plate.

a. Perform shop hydrostatic test on pipe which stresses steel to 75 percent of minimum yield point of the steel.

b. Hold pressure long enough to allow thorough inspection of welded joints.

c. Repair leaks by re-welding and retesting of joints.

2. Fittings fabricated from tested steel pipe do not require hydrostatic testing if girth butt welds are complete penetration welds.

a. Girth weld test: Dye penetrant test welds in accordance with ASTM E165.

b. Weld defect repair. Chip, flame gouge, or grind to sound metal; re-weld;

and test the repaired weld.

D. Ductile Iron Fittings:

33 11 19 - 6

1. Test in accordance with AWWA C110 or AWWA C153.

PART 3 EXECUTION

3.01 LAYING PIPE

A. Excavate pipe trench in accordance with Section 31 23 22 - Pipe Trench Earthwork.

1. Grade pipe trenches to provide uniform slope along bottom of pipe.

2. At joints involving bells or collars, provide holes at joint of ample size to prevent bells or collars from coming in contact with subgrade.

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

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

D. On grades exceeding 10 percent, lay pipe uphill.

E. When pipelaying is not in progress, keep ends of pipelines closed.

F. Joining Pipe:

1. Follow manufacturer’s recommendations for installation.

2. Inspect pipe end and/or coupling, elastomeric gasket, and sealing surfaces for damage.

3. Before assembling pipe joints, clean gasket, bell or coupling, especially the groove, and the spigot with a rag, brush, or paper towel to remove dirt or foreign material.

4. Placing Elastomeric Gasket:

a. Spigot Groove Method:

1) Follow manufacturer’s recommended practices for gasket installation.

2) Apply manufacturer’s approved joint lubricant to spigot interior and elastomeric gasket.

3) After placing elastomeric gasket in spigot groove, equalize elastomeric gasket cross section by inserting a tool such as a large screwdriver under the elastomeric gasket and moving it around the periphery of the pipe spigot.

b. Coupling Groove Method:

1) Follow manufacturer’s recommended practices for gasket installation. Typically this method is factory installed.

33 11 19 - 7

5. Fit pipe units together, spigot to bell or coupling, and draw the joints together so that the bells or couplings and spigots are fully engaged.

6. Do not swing or "stab" the joint and do not suspend the pipe and swing it into the bell or coupling.

7. Fit pipe units together in a manner to avoid twisting or otherwise displacing or damaging the elastomeric gasket.

8. When using gaskets of circular cross section, after pipe units have been joined, insert a feeler gauge between the pipe bell and pipe spigot and move it around the periphery of the pipe to determine that the position of the elastomeric gasket is correct and there are no fish-mouth problems. If adjustment of the position of a length of pipe is required after installation, remove and relay the length of pipe as for a new pipe.

9. Maintain pipe securely in final position.

G. Changes in Alignment and Grade:

1. Make changes in alignment and grade with miter bends.

2. Make minor changes in alignment and grade by pulling pipe joints.

a. Pull rubber gasket coupling or bell and spigot joint.

b. Maximum deflection:

1) 1 degree or deflection As recommended by pipe manufacturer, whichever is less for pipe head class less than or equal to 450 feet.

2) 0.75 degree or deflection recommended by pipe manufacturer, whichever is less for pipe head class equal to or greater than 475 feet.

3. Lay ends of each section of pipe on the theoretical centerline of the curve and to the grade shown on the drawings within the laying tolerances prescribed above.

H. Thrust Restraint:

1. Restrained joint couplings in combination with concrete blocking, encasements and collars.

a. Concrete in encasements, blocking and collars in accordance with Section 03 33 00 - Cast-in-Place Concrete.

2. Joint restraint couplings to lengths shown on drawing 1695-D-60049:

a. Double bell with rubber gaskets and locking rods.

3. Alternate methods of coupling restraint may be used if approved by the COR.

I. Closure Sections:

1. Use closure sections where necessary as determined by the Contractor, subject to the approval of the COR.

33 11 19 - 8

2. Follow manufacturer’s recommendations.

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

3.02 TOLERANCES

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

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

3.03 BACKFILL

A. Backfill pipe in accordance with Section 31 23 22 - Pipe Trench Earthwork.

1. Place backfill about pipe carefully to avoid lateral displacement of the pipe and damage to joints.

2. In certain pipeline reaches, where determined necessary by the COR to prevent the possibility of flotation, do not lay more than 300 linear feet of pipe ahead of backfilling operations.

3. If pipelaying operations are interrupted for more than 24 hours, cover pipe laid in the trench with backfill.

3.04 PIPE DEFLECTION

A. Allowable vertical pipe diameter deflection after backfilling is complete.

1. Decrease, maximum: 3 percent of nominal pipe diameter.

2. Elongation, maximum: 1.5 percent of nominal pipe diameter as measured when backfill reaches pipe crown.

B. Within 2 weeks after backfilling is completed, take measurements of internal diameters.

C. Measurement Frequency:

1. Midpoint of pipe section at approximate 50 feet intervals for the first 500 feet of backfilled pipe, and once every 200 feet intervals thereafter.

2. In areas of deep burial or where special problems are encountered, the frequency of measurements may be increased at the discretion of COR.

D. Measurements:

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

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

3. If a pipe deflection exceeds the allowable:

a. Take measurements at midpoint of pipe unit upstream and downstream at approximate 50 foot intervals to determine extend of excessive deflection.

33 11 19 - 9

b. Provide measurements to COR.

4. Mark inside of pipe so that future comparisons can be made.

E. If a pipe unit deflection exceeds the allowable.

1. Take measurements in adjacent pipe units to determine extent of excessive deflection.

2. Provide deflection data to COR.

F. Additional direction will be provided after deflection data is analyzed.

1. Take corrective action that including removing and replacing pipe that exceeds allowable deflection tolerance.

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