02730 spec - sanitary sewerage

KFU in Ahsa J06-09600

02730-1 Sewerage System

SECTION 02730

SANITARY SEWERAGE SYSTEM PART 1 - GENERAL 1.1. SECTION INCLUDES

A. Sewerage system outside buildings and up to interface points as shown on Drawings.

B. Sewerage system shall include the following:

1. Pipes and pipe fittings. 2. Sewer manholes. 3. Lift Station as well as the related components including pumps and controllers.

4. Miscellaneous materials related to the sewerage system.

1.2. REFERENCES

A. SASO – Saudi Arabian Standards Organization

SASO-14 Pipes for Potable Water of Unplasticized polyvinyl chloride (uPVC).

SASO-15 Method of Testing of Pipes for Potable Water of Unplasticized

polyvinyl chloride (uPVC). SASO 412 Method of Testing for Cast Iron Manhole Covers SASO 413 Cast Iron Manhole Covers. SASO 1395 Unplasticized polyvinyl chloride (uPVC) pipes for

buried/drains and sewers. SASO 1396 Methods of testing unplasticized polyvinyl chloride (uPVC)

pipes for buried/drains and sewers. SASO 1397 Unplasticized polyvinyl chloride (uPVC) pipe fittings for

buried/drains and sewers. SASO 1398 Methods of test for unplasticized polyvinyl chloride (uPVC)

pipe fittings for buried/drains and sewers. SASO 1014 Socket and spigot ductile cast iron pipes for pressure

pipelines B. ASTM - American Society for Testing and Materials:



ASTM A 193/A Alloy-Steel and stainless Steel Bolting Materials for High-

Temperature Service ASTM A 194/A Carbon and Alloy-Steel Nuts for Bolts for High-pressure and

High- Temperature Service ASTM D 1784 Rigid Poly (Vinyl Chloride) (PVC) Compounds and

Chlorinated Poly (Vinyl Chloride) (CPVC) Plastic Hot- and Cold-Water Compounds.

ASTM D 1785 Poly(Vinyl Chloride) (PVC) Plastic Pipe, Schedules 40, 80,

and 120 ASTM D 2466 Poly(Vinyl Chloride) (PVC) Plastic Pipe Fittings, Schedule 40 ASTM D 2467 Socket-Type (Vinyl Chloride) (PVC) Plastic Pipes Fittings,

Schedule 80 ASTM D 2564 Solvents Cements for Poly(Vinyl Chloride) (PVC) Plastic Pipe

and Fittings ASTM D 2855 Making Solvent-Cemented Joints with Poly (Vinyl Chloride)

(PVC) Pipes and Fittings ASTM D 3034 Type PSM Poly(Vinyl Chloride) (PVC) Sewer Pipe and

Fittings ASTM D 3139 Joints for Plastic Pressure Pipes Using Flexible Elastomeric

Seals ASTM F 436 Hardened Steel washers ASTM F 477 Elastomeric Seals (Gasket) for Jointing Plastic Pipes ASTM F 656 Primers for Use in Solvent-Cement Joints of Poly (Vinyl

Chloride) (PVC) Pipes and Fittings

C. ANSI - American National Standard Institute ANSI B16.5 Steel Pipe Flanges and Flanged Fittings

D. ASME - American Society of Mechanical Engineers: ASME A40.8 National Plumbing Code. 1.3. SUBMITTALS

A. Product and Maintenance Data: Submit manufacturer's product and maintenance data for piping materials, precast elements lift station and fiberglass manholes as well as the related items.



B. Coordination Drawings: Prepare and submit coordination drawings for sanitary sewerage piping including details for installation of manholes, lift station and other items related to the sewerage system.

1.4. WARRANTY

A. Provide a written Guarantee covering the satisfactory operation of plumbing installations for a period of one year from the date of acceptance. During this period, repair providing new materials to replace defective work at no extra cost to the Owner.

1.5. TRANSPORTATION, HANDLING AND STORAGE

A. Conform to manufacturer's recommendations for the handling, transportation and storage of fiberglass manholes and precast elements as well as nesting, denesting and stacking of pipes.

1.6. QUALITY ASSURANCE

A. Comply with the applicable requirements of the Uniform Plumbing Code (UPC), Basic National Plumbing Code, local utility authority requirements as well as the Codes and Standards referred to in this Section.

B. Single Source Manufacturer: Provide pipes, fittings and piping specialties for a

particular installation from a single source to avoid incompatibility due to intermixing of products.

C. Installer's Qualifications: Installer shall be subject to the Engineer's approval.

PART 2 - PRODUCTS 2.1. PIPES AND PIPE FITTINGS

A. General:

1. Materials used for pipes and pipe fittings shall conform to Standards referred to herein.

2. Provide pipes and pipe fittings for a particular installation from a single source

to avoid incompatibility due to inter-mixing of products. 3. For Gravity Sewers Underground: Provide uPVC pipes and pipe fittings,

Schedule 40 or Class IV or as indicated on Drawings. 4. For Force Mains:

a. Ductile iron pipes without cement lining conforming to ISO 2531 or

ASTM A 377.

B. uPVC Pipes and Pipe Fittings:



1. Pipes: Unplasticized polyvinyl chloride (uPVC) plastic pipes conforming to

ASTM D 3034 or ASTM D 1785, or SASO 4 to 14 and 15 standards, Schedule as mentioned above.

2. Pipe Fittings: Socket-type and bell and spigot type unplasticized polyvinyl

chloride (uPVC) plastic fittings conforming to ASTM D 3034 or ASTM D 2466 or ASTM D 2467, or SASO standards, Schedule/Class to match that of pipe.

3. Jointing System:

a. Welded joints using solvent cement conforming to ASTM D 2564, for

pipes less than 100 mm diameter. b. Gasketed joints using elastomeric seals conforming to ASTM F 477, for

pipes of 100 mm and larger diameter. 2.2. SEWER MANHOLES

A. Shall be reinforced concrete, Class 30 complying with Division 3 - CONCRETE.

1. Exterior Surfaces: Exterior surfaces shall be coated at factory with a 100% solids coal-tar epoxy.

2. Interior Surfaces: Lining complying with 07100 - WATERPROOFING. 3. Manhole Cover and Frame: Conform to the requirements of SASO 412, SASO

413 and Section 05500 - METAL FABRICATIONS. 2.3. LIFT STATION

A. Underground lift station shall be constructed of reinforced concrete with waterproof lining on all inside areas and double layer full tanking on outside walls and foundation using waterproofing membrane complying with the requirements of Section 07100 - WATERPROOFING. Waterproofing on exterior walls shall be protected against soil with protection board. Reinforced concrete shall comply with the requirements of Division 3 - CONCRETE. Concrete shall be of minimum 30 MPa compressive strength at 28 days. Size of lift station shall be as shown on drawings. Lift station shall be provided with submersible sewage pumps with lifting chains, access cover and ladder rungs.

B. Cover and Frame: Covers and frames shall be of gray cast iron casting, heavy duty,

all complying with ASTM A48 or BS 497, Appendix A. Type and size shall be as shown on the drawings or selected by the Engineer. The words "SEWER" in Arabic and English shall be cast in covers. Covers and frames shall be coated with coal tar epoxy coating.

2.4. MISCELLANEOUS MATERIALS



A. Marker Tape: Detectable polyethylene plastic tape with metallic core, color-coded,

150 mm wide, 100 microns thick, and labeled in Arabic and English alternately for the appropriate service.

B. Anchor and Thrust Blocks:

1. Construction: Anchors and thrust blocks shall be of 20 MPa compressive

strength conforming to Section 03300 - CAST-IN-PLACE CONCRETE, using Type 1 cement modified with silica fume.

2. Location and Bearing Areas of Thrust Block: Conform to the International

Association of Plumbing and Mechanical Officials (IAPMO) Standard IS-8-81 as required by the Uniform Plumbing Code, including tees, bends and valves unless otherwise indicated on Drawings.

3. Trench Drain Grating: Medium duty cast iron with steel frame. Provide

manufacturer's standard corrosion protection coating for grating. PART 3 - EXECUTION 3.1. GENERAL

A. Products shall be installed in strict accordance with the manufacturer's instructions and recommendations.

B. Excavation for Sewer Manholes: Conform to the requirements of Section 02200 -

EARTHWORK.

C. Dewatering: Dewatering shall conform to the requirements of Section 02200 - EARTHWORK.

3.2. INSPECTION

A. Inspect products for damage immediately before installation. Damaged products or products found to be not in accordance with the Specifications shall be rejected and removed from site and replaced with the appropriate products. Repairs shall not be undertaken without the Engineer review of the proposed action.

3.3. RELATED WORKS

A. Trenching and bedding for underground piping shall conform to Section 02225 - TRENCHING AND BACKFILLING.

B. Pipelines Crossings under Roads: Conform to the requirements of Section 02225 -

TRENCHING AND BACKFILLING

C. Dewatering: Dewatering, where required, shall conform to the requirements of Section 02200 - EARTHWORK.

3.4. PIPE INSTALLATION



A. Install piping at low point of system, true to grades and alignment indicated with

unbroken continuity of invert. Place bell ends of piping facing upstream. Install joints in accordance with manufacturer's written instructions and recommendations. Maintain swab or drag in line and pull past each joint as it is completed.

B. Pipe Joints:

1. uPVC Pipes: Install joints in accordance with ASTM D 3212, ASTM D 2321 and

manufacturer's written instructions. 2. Install flanged joints in accordance with manufacturer's written instructions.

C. Plug open ends of pipe at the end of work in each area and at the end of each day.

D. Provide the required connections with extreme care to prevent debris from entering sewer. Check the invert elevations to which connections are to be made.

E. Record of grade letters, survey invert elevations and manhole stations as well as

sewer locations shall be accurately maintained as construction proceeds.

F. Outside lines shall be built to grades and elevations shown. Stakes, grade boards, cleats, nails, instruments, etc. shall be provided. Each pipeline shall be located and staked in its entire length.

3.5. SYSTEM TESTING

A. Testing of Gravity Sewers: Testing shall be carried out from manhole to manhole. Branch sewers less than 10 m long connected to main sewer between manholes shall be tested separately. Pipes and joints shall be watertight.

B. Testing of Sewer Piping:

1. Pipelines shall be tested hydraulically in sections during the course of

construction. Testing shall be applied to prove the structural soundness of the various units in the line, including pipes, valves and various units in the line, including pipes, valves and anchorages, and to prove water-tightness of the line. Tests shall be applied to sections of pipeline not exceeding 1000 m in length, or such lesser length may be required, and pipe joints shall be left uncovered. Provide pumps, jacks, gauges, struts and apparatus necessary for carrying out the tests. Provide certificates for all gauges issued for testing.

2. Before testing, anchoring of bends shall be complete and branch outlets taking

end thrust shall be properly stayed. 3. Test pressure shall be 30 kPa. 4. When testing, the pipeline shall be charged with water and all air released.

Care shall be taken during charging of mains to provide free outlets for air and to prevent water hammer.

5. Pipeline shall then be kept under a nominal pressure for a period of 24 hours to



allow for absorption. Thereafter, for a period of two hours the amount of water pumped during the period of test shall be measured and shall not exceed a rate of 0.1 liter per millimeter nominal diameter of the sewer per kilometer length of main per 30 kPa head for each 24 hours.

6. If the amount of make-up water in the 2-hour test exceeds the specified

quantity, the leaks shall be located and repaired and the test repeated. 7. Test on each section shall be repeated until the specified degree of water-

tightness has been obtained. Any additional tests required by the Engineer shall be carried out by Contractor without any extra costs to Owner.

8. In addition to the tests in separate sections, on completion, the main shall be

tested in whole or in parts to the same pressure and by the same procedure as that outlined for individual sections.

9. No erosion or silting shall be allowed to occur in water courses from the

discharge of test water.

C. Testing and commissioning of pump set motors and associated fittings shall be carried out by the manufacturer's or supplier's field commissioning and testing personnel.

3.6. BACKFILL

A. Trench backfilling shall conform to the requirements of Section 02225 - TRENCHING AND BACKFILLING.

B. Marker Tape: Install continuous, marker tape during backfilling of trench for

underground services. Locate tape 300 mm below finished grade.

END OF SECTION

02730 spec - sanitary sewerage

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