33 31 23 - Sanitary Sewerage Force Main Piping.pdf

33 31 23 – SANITARY SEWERAGE FORCE MAIN PIPING

Herbert, Rowland & Grubic, Inc. 33 31 23 - 1 000483.0450

SECTION 33 31 23 – SANITARY SEWERAGE FORCE MAIN PIPING

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Force mains.

2. Bedding and cover materials.

B. Related Requirements:

1. Section 03 30 00 – Cast-in-Place Concrete: Concrete material requirements.

2. Section 31 05 13 – Soils for Earthwork: Soil backfill from above pipe to finish grade.

3. Section 31 05 16 – Aggregates for Earthwork: Aggregate for pipe bedding and cover.

4. Section 31 23 16.13 – Trenching: Excavation, backfilling, compacting, and fill over underground pipe markers.

5. Section 31 23 23 – Fill: Requirements for fill over underground pipe markers.

6. Section 33 05 05.31 – Hydrostatic Testing: Pressure testing of completed force mains.

7. Section 33 05 09.33 – Thrust Restraint for Utility Piping: Thrust restraints as required by this Section.

8. Section 33 05 61 – Concrete Manholes: Connection to sanitary sewerage system.

9. Section 33 05 97 – Identification and Signage for Utilities: Pipe markers.

1.2 REFERENCE STANDARDS

A. American Association of State Highway and Transportation Officials:

1. AASHTO T180 - Standard Method of Test for Moisture-Density Relations of Soils

Using a 4.54-kg (10-lb) Rammer and a 457-mm (18-in.) Drop.

B. American Water Works Association:

1. AWWA C104 - Cement-Mortar Lining for Ductile-Iron Pipe and Fittings.

2. AWWA C110 - Ductile-Iron and Gray-Iron Fittings.

3. AWWA C111 - Rubber-Gasket Joints for Ductile-Iron Pressure Pipe and Fittings.

4. AWWA C151 - Ductile-Iron Pipe, Centrifugally Cast.

5. AWWA C900 - Polyvinyl Chloride (PVC) Pressure Pipe and Fabricated Fittings, 4 In.

through 12 In. (100 mm through 300 mm), for Water Transmission and Distribution.

C. ASTM International:

1. ASTM D698 - Standard Test Methods for Laboratory Compaction Characteristics of Soil Using Standard Effort (12,400 ft-lbf/ft3 (600 kN-m/m3).

2. ASTM D1557 - Standard Test Methods for Laboratory Compaction Characteristics of Soil Using Modified Effort (56,000 ft-lbf/ft3 (2,700 kN-m/m3).

3. ASTM D1785 - Standard Specification for Poly(Vinyl Chloride) (PVC) Plastic Pipe, Schedules 40, 80, and 120.

Herbert, Rowland & Grubic, Inc. 33 31 23 - 2 000483.0450

4. ASTM D2241 - Standard Specification for Poly(Vinyl Chloride) (PVC) Pressure- Rated Pipe (SDR Series).

5. ASTM D2466 - Standard Specification for Poly(Vinyl Chloride) (PVC) Plastic Pipe Fittings, Schedule 40.

6. ASTM D2467 - Standard Specification for Poly(Vinyl Chloride) (PVC) Plastic Pipe Fittings, Schedule 80.

7. ASTM D6938 - Standard Test Method for In-Place Density and Water Content of Soil and Soil-Aggregate by Nuclear Methods (Shallow Depth).

D. Ductile Iron Pipe Research Association (DIPRA):

1. Thrust Restraint Design for Ductile Iron Pipe.

1.3 COORDINATION

A. Section 01 31 13 – Project Coordination: Requirements for coordination.

B. Coordinate Work of this Section with connection to existing force main.

1.4 PREINSTALLATION MEETINGS

A. Section 01 31 16 – Project Meetings: Requirements for preinstallation meeting.

B. Convene minimum one week prior to commencing Work of this Section.

1.5 SUBMITTALS

A. Section 01 33 00 – Submittal Procedures: Requirements for submittals.

B. Product Data: Submit manufacturer information indicating pipe material used, pipe accessories, valves, and restrained joint details and materials.

C. Shop Drawings:

1. Indicate piping piece numbers and locations.

2. Indicate restrained joint locations.

D. Manufacturer's Certificate: Certify that products meet or exceed specified requirements.

E. Manufacturer Instructions: Indicate special procedures required to install specified products.

F. Field Quality-Control Submittals: Indicate results of Contractor-furnished tests and inspections.

G. Qualifications Statements:

1. Submit qualifications for manufacturer and installer.

1.6 CLOSEOUT SUBMITTALS

A. Section 01 77 00 – Closeout Requirements: Requirements for submittals.

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B. Project Record Documents: Record invert elevations and actual location of pipe runs and connections.

C. Identify and describe unexpected variations to subsoil conditions or discovery of uncharted utilities.

1.7 QUALITY ASSURANCE

A. Design ductile-iron pipe restrained joints according to DIPRA standards.

1.8 QUALIFICATIONS

A. Manufacturer: Company specializing in manufacturing products specified in this Section with minimum three years' documented experience.

B. Installer: Company specializing in performing Work of this Section with minimum three years' documented experience and approved by manufacturer.

C. Licensed Professional: Professional engineer experienced in design of specified Work and licensed in State of Pennsylvania.

1.9 DELIVERY, STORAGE, AND HANDLING

A. Section 01 61 00 – Product Requirements: Requirements for transporting, handling, storing, and protecting products.

B. Inspection: Accept materials on Site in manufacturer's original packaging and inspect for damage.

C. Storage:

1. Store materials according to manufacturer instructions.

2. Do not place materials on private property without written permission of property owner.

3. Do not stack pipe higher than recommended by pipe manufacturer.

D. Protection:

1. Protect materials from moisture and dust by storing in clean, dry location remote from construction operations areas.

2. Store gaskets for mechanical and push-on joints in cool and dry location, out of direct sunlight, and not in contact with petroleum products.

3. Provide additional protection according to manufacturer instructions.

1.10 EXISTING CONDITIONS

A. Field Measurements:

1. Verify field measurements prior to fabrication.

2. Indicate field measurements on Shop Drawings.

Herbert, Rowland & Grubic, Inc. 33 31 23 - 4 000483.0450

PART 2 - PRODUCTS

2.1 FORCE MAIN

A. Ductile-Iron Pipe:

1. Comply with AWWA C151 and AWWA C104.

2. Interior lining: Protecto 401.

3. Pressure Classes:

a. Sizes 3 to 12 Inches: Class 52, 350 psig.

B. Ductile-Iron Fittings:

1. Comply with AWWA C110.

2. Pressure Rating: 250 psig.

3. Exterior coating: Standard – Asphaltic coating.

C. Joints:

1. Comply with AWWA C111.

2. Type: Mechanical or push on with restrained joints.

D. Rubber Gaskets, Lubricants, Glands, Bolts, and Nuts: Comply with AWWA C111.

2.2 MATERIALS

A. Bedding and Cover: AASHTO No. 8 in accordance with Section 31 05 16 – Aggregates for Earthwork.

B. Soil Backfill from above Pipe to Finish Grade: Material of maximum size that can be readily placed in loose, 8-inch layers; conforming to the requirements below. Frozen material shall not be utilized.

1. Soil. Includes earth material with the following physical characteristics:

2. Gradation—More than 35% passing No. 200 sieve.

3. Minimum dry mass density—95 pounds per cubic foot determined according to

PennDOT PTM No. 106, Method B.

4. Maximum liquid limit—65, determined according to AASHTO T 89.

5. Plasticity index—not less than liquid limit minus 30, determined according to

AASHTO T 90 for soils with liquid limits of 41 to 65.

2.3 MIXES

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

2.4 ACCESSORIES

A. Pipe Markers: As specified in Section 33 05 53 – Identification for Utilities Piping and Equipment.

Herbert, Rowland & Grubic, Inc. 33 31 23 - 5 000483.0450

PART 3 - EXECUTION

3.1 EXAMINATION

A. Section 01 73 00 – Execution Requirements: Requirements for installation examination.

B. Verify that trench cut is ready to receive Work.

C. Verify that excavations, dimensions, and elevations are as indicated on Drawings.

3.2 PREPARATION

A. Section 01 73 00 – Execution Requirements: Requirements for installation preparation.

B. Correct over-excavation with coarse aggregate.

C. Remove large stones or other hard matter capable of damaging pipe or of impeding consistent backfilling or compaction.

3.3 INSTALLATION

A. Bedding:

1. Excavate pipe trench as specified in Section 31 23 16.13 – Trenching.

2. Place bedding material at trench bottom.

3. Level materials in continuous layers not exceeding 8 inches in depth.

4. Maintain optimum moisture content of bedding material to attain required compaction density.

B. Piping:

1. Install pipe, fittings, and accessories as indicated on Drawings.

2. Route piping in straight line.

3. Install bedding at sides and over top of pipe to minimum compacted thickness of

12 inches.

4. Backfilling and Compacting:

a. As specified in Section 31 23 16.13 – Trenching and 31 23 23 – Fill.

b. Do not displace or damage pipe while compacting.

5. Connect to existing force main.

6. Pipe Markers: As specified in Section 33 05 97 – Identification and Signage for

Utilities.

7. Installation Standards: Install Work according to Northwestern Chester County

Municipal Authority standards.

C. Thrust Restraints:

1. Provide pressure pipeline with restrained joints AND concrete thrust blocking at bends, tees, and changes in direction.

2. Construct concrete thrust blocking as indicated on Drawings.

D. Cradles and Encasements:

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1. Provide concrete cradles and encasements for pipelines where indicated on Drawings and as specified in Section 03 30 00 – Cast-in-Place Concrete.

3.4 FIELD QUALITY CONTROL

A. Section 01 40 00 - Quality Requirements: Requirements for inspecting and testing.

B. Inspections: Request inspection by Engineer prior to and immediately after placing bedding.

C. Pressure Testing: As specified in Section 33 05 05.31 – Hydrostatic Testing.

D. Compaction Testing:

1. Comply with ASTM D698 or ASTM D1557.

2. Testing Frequency: As directed by Engineer.

3.5 PROTECTION

A. Section 01 73 00 – Execution Requirements: Requirements for protecting finished Work.

B. Protect pipe and aggregate cover from damage or displacement until backfilling operation is in progress.

END OF SECTION 33 31 23