40 23 23 - Potable Water Process Piping.pdf

40 23 23 - POTABLE WATER PROCESS PIPING

Herbert, Rowland & Grubic, Inc. 40 23 23 - 1 005153.0436

SECTION 40 23 23 - POTABLE WATER PROCESS PIPING

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Pipes and tubes for conveying potable process water.

2. Valves for conveying potable process water.

B. Related Requirements:

1. Section 40 05 06 - Couplings, Adapters, and Specials for Process Piping: Pipe penetrations, restrained joints, flexible connections, expansion joints and loops, and sleeve-type couplings.

2. Section 40 05 07 - Hangers and Supports for Process Piping: Supports, hangers, anchors, and guides.

3. Section 40 05 23 - Stainless Steel Process Pipe And Tubing.

4. Section 40 05 51 - Common Requirements for Process Valves: Common product requirements for valves for placement by this Section.

5. Section 40 05 61 - Gate Valves: Valves and accessories.

6. Section 40 05 65 - Check Valves: Valves and accessories.

7. Section 40 42 13 - Process Piping Insulation: Insulation requirements for pipe, fittings, and appurtenances.

1.2 REFERENCE STANDARDS

A. American Water Works Association:

1. AWWA C651 - Disinfecting Water Mains.

B. American Welding Society:

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

C. ASME International:

1. ASME A13.1 - Scheme for the Identification of Piping Systems.

2. ASME B31.3 - Process Piping.

D. ASTM International:

1. ASTM A780/A780M - Standard Practice for Repair of Damaged and Uncoated

Areas of Hot-Dip Galvanized Coatings.

E. NSF International:

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

2. NSF 372 - Drinking Water System Components - Lead Content.

F. SSPC: Society for Protective Coatings:

1. SSPC-Paint 20 - Zinc-Rich Coating (Type I - Inorganic and Type II - Organic).

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1.3 SUBMITTALS

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

B. Product Data:

1. Piping: Submit manufacturer information on pipe materials, fittings, and accessories.

2. Hangers and Supports: Submit manufacturer catalog information, including load capacity.

3. System Components: Submit manufacturer catalog information including capacity, component sizes, rough-in requirements, and service sizes.

4. Valves: Submit manufacturer information for actuators with model number and size indicated.

C. Shop Drawings:

1. Piping:

a. Indicate piping system schematic with general assembly of components and mounting and installation details.

b. Submit list of wording, symbols, letter size, and color-coding for pipe identification; comply with ASME A13.1.

2. Submit layout drawings showing piece numbers and location.

3. Valves: Submit assembly drawings indicating parts list, materials, sizes, position indicators, limit switches, control system, actuator mounting, wiring diagrams, and control system schematics.

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

E. Welder Certificates: Certify welders and welding procedures employed on Work, verifying AWS qualification within previous 12 months.

F. Manufacturer Instructions: Submit detailed instructions on installation requirements, including storage and handling procedures.

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

1.4 CLOSEOUT SUBMITTALS

A. Section 01 77 00 - Closeout Procedures: Requirements for submittals.

B. Project Record Documents: Record actual locations of piping and valves.

C. Operation and Maintenance Data: Submit assembly views and replacement part numbers and availability.

1.5 QUALITY ASSURANCE

A. Materials in Contact with Potable Water: Certified to NSF 61 and 372.

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B. Perform Work according to AWS D1.1/D1.1M for welding of hanger and support attachments to building structure.

C. Maintain one copy of each standard affecting Work of this Section on Site.

1.6 QUALIFICATIONS

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

B. Welders: AWS qualified within previous 12 months for employed weld types.

1.7 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. Store materials according to manufacturer instructions.

D. Protection:

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

2. Provide additional protection according to manufacturer instructions.

1.8 EXISTING CONDITIONS

A. Field Measurements:

1. Verify field measurements prior to fabrication.

2. Indicate field measurements on Shop Drawings.

1.9 WARRANTY

A. Section 01 78 36 - Warranties: Requirements for warranties.

B. Furnish one-year manufacturer's warranty for piping and valves.

PART 2 - PRODUCTS

2.1 PIPING AND VALVES FOR CONVEYING POTABLE PROCESS WATER

A. Piping: As specified in Section 33 14 16 - Site Water Utility Distribution Piping.

B. Valves: As indicated on Drawings.

C. Valve Service:

1. Shutoff, Drain, and Isolation:

a. As indicated on Drawings.

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b. Valve Type for Shutoff Service: As indicated on Drawings.

2. Bypass: As indicated on Drawings.

2.2 PIPE HANGERS AND SUPPORTS

A. As specified in Section 40 05 07 - Hangers and Supports for Process Piping.

PART 3 - EXECUTION

3.1 EXAMINATION

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

B. Verify that field dimensions are as indicated on Shop Drawings.

3.2 PREPARATION

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

B. Protect materials and equipment from damage and intrusion of water and other materials.

3.3 INSTALLATION

A. As indicated on Shop Drawings, according to manufacturer instructions, and ASME B31.3.

B. Use minimum number of joints.

C. Expansion Joints: In locations where pipe expansion joints are indicated, install pipe alignment guides adjacent to and within four pipe diameters of joint.

D. Field Fabrication of Fittings: According to manufacturer instructions.

E. Provide thrust restraints as required.

F. Flexible Couplings and Expansion Joints:

1. At connections to equipment and where indicated on Shop Drawings.

2. As specified in Section 40 05 06 - Couplings, Adapters, and Specials for Process

Piping.

G. Couplings, Service Saddles, and Anchors: According to manufacturer instructions.

H. Provide upstream and downstream clearances according to component manufacturer instructions.

I. Insulation: As indicated on Drawings.

J. Local Indicators:

1. Install direct-reading indicator devices such as thermometers and pressure gages as indicated on Drawings and according to manufacturer instructions.

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2. Location: Capable of being read from floor level and accessible for maintenance.

K. Orientate valves to permit operation and maintenance access to valve operator and to avoid interferences with other equipment.

3.4 FIELD QUALITY CONTROL

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

B. Inspection:

1. Inspect for damage to pipe lining or coating and for other defects that may be detrimental as determined by Engineer.

2. Repair damaged piping, or provide new, undamaged pipe.

3. After installation, inspect for proper supports and interferences.

C. Pressure Testing:

1. Test Pressure: Not less than 200 psig or 50 psi in excess of maximum static pressure, whichever is greater.

2. Conduct hydrostatic test for at least two hours.

3. Fill section to be tested with water slowly; expel air from piping at high points.

Install corporation cocks at high points. Close air vents and corporation cocks after air is expelled. Raise pressure to specified test pressure.

4. Observe joints, fittings, and valves under test. Remove and renew cracked pipe, joints, fittings, and valves showing visible leakage. Retest.

5. Correct visible deficiencies and continue testing at same test pressure for additional two hours to determine leakage rate. Maintain pressure within plus or minus 5 psi of test pressure. Leakage is defined as quantity of water supplied to piping necessary to maintain test pressure during period of test.

6. Compute maximum allowable leakage by following formula:

a. L = SD x sqrt (P)/C.

b. L = testing allowance, in gallons per hour.

c. S = length of pipe tested, in feet.

d. D = nominal diameter of pipe, in inches.

e. P = average test pressure during hydrostatic test, in psig.

f. C = 148,000.

g. When pipe under test contains sections of various diameters, calculate allowable leakage from sum of computed leakage for each size.

h. If test of pipe indicates leakage greater than allowed, locate source of leakage, make corrections, and retest until leakage is within allowable limits.

i. Correct visible leaks regardless of quantity of leakage.

7. Engineer will witness testing.

D. Disinfection, Flushing, and Sampling:

1. Disinfect pipeline installation according to AWWA C651.

2. Use of liquid chlorine is not permitted.

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3. Upon completion of retention period required for disinfection, flush pipeline until chlorine concentration in water leaving pipeline is no higher than that generally prevailing in existing system or is acceptable for domestic use.

4. Disposal:

a. Legally dispose of chlorinated water.

b. If chlorinated discharge may cause damage to environment, apply neutralizing chemical to chlorinated water to neutralize chlorine residual remaining in water.

5. After final flushing and before pipeline is connected to existing system or placed in service, employ an approved independent testing laboratory to sample, test, and certify that water quality meets quality standards of the Pennsylvania Department of Environmental Protection.

E. Equipment Acceptance: Adjust, repair, modify, or replace components failing to perform as specified and rerun tests.

F. Damaged Coatings:

1. Repair damaged coatings with material equal to original coating.

3.5 ADJUSTING

A. Section 01 73 00 - Execution Requirements: Requirements for starting and adjusting.

B. Field-calibrate local indicators at time of piping installation.

3.6 CLEANING

A. Section 01 73 00 - Execution Requirements: Requirements for cleaning.

B. Keep piping and valve interiors clean as installation progresses.

3.7 DEMONSTRATION

A. Section 01 73 00 - Execution Requirements: Requirements for demonstration and training.

B. Demonstrate valve operation, routine maintenance, and emergency repair procedures to Owner's personnel.

END OF SECTION