Amend_0003_-_Attach_2_-_updated_33_10_00_Water_Utilities_0003.doc

DIVISION 33 – UTILITIES

SECTION 33 10 00 - WATER UTILITIES

DIVISION 33 – UTILITIES

SECTION 33 10 00 - WATER UTILITIES

PART 1 – GENERAL

1.01

DESCRIPTION OF WORK

A.

The extent of Water Utilities work is indicated on the drawings. Work includes the requirements for providing the geothermal supply system complete in place, including but not limited to piping, fittings, welding, expansion loops, flexible connections, pipe sleeves, joint restraints, valves, valve boxes, pipe supports, vaults, excavation, bedding, backfill, compaction, and associated work, all in conformance with these specifications and the dimensions and sections indicated on the drawings or within the lines and grades established by the Engineer.

1.02

QUALITY ASSURANCE

A.

Qualification of Workers: Employ the services of a qualified utility contractor, who will be thoroughly familiar with the type of materials being installed and the best methods for their installation, and who shall direct all work performed under this section.

B.

Codes and Standards: Comply with the applicable provisions of all pertinent codes and regulations. References made herein for manufactured materials, such as pipe, fittings, valves, and specialties; refer to designations for American Water Works Association (AWWA), American National Standards Institute (ANSI) and to the latest edition of the Oregon Department of Transportation Standard Specifications for Construction (OSS) and the American Public Works Association (APWA).

C.

The existing geothermal supply system at the site must remain functional at all times. Any damage to existing geothermal supply system components occurring as a result of work performed by the Contractor shall be repaired at the expense of the Contractor.

D.

Performance Requirements: All geothermal supply system components, unless noted otherwise, shall be rated for a working pressure of at least 250 psi at 73F and 50psi at 220F, meet current Safe Drinking Water Act lead free requirements and be approved for potable use by National Sanitation Foundation (NSF).

E.

Manufacturer Technical Assistance: The manufacturer of geothermal supply piping shall provide minimum of 2 days of on-site technical assistance during installation of the piping. The manufacturer representative shall be a factory trained technician to witness requirements outlined in the installation portion of this specification.

1.03

REFERENCES

A.

OSS – Oregon Department of Transportation Standard Specifications for Construction, 2021 Edition.

B.

Comply with provisions in ASME B31 Series, "Code for Pressure Piping."

1.04

SUBMITTALS

Submit the following in accordance with Section 01 33 00 - Submittal Procedures for the following products:

A.

Piping, Fittings, Valves, Accessories

1.

Manufacturer's catalog cuts and shop drawings to demonstrate that all items conform to the specifications for the following:

a.

Pipe, fittings, couplings and accessories b.

Expansion loops c.

Flexible fittings d.

Valves e.

Valve boxes f.

Pipe supports 2.

Manufacturer’s installation and operations manuals, bulletins and spare parts lists for all items.

B. Pipe Welding Qualifications

1.

Submit certifications documenting that each pipe welder who will perform field welding of pipe has passed AWS qualification tests for the welding processes and materials involved and that each certification is current.

C.

Geothermal Supply Pipe Layout Plans

1.

Submit shop drawings detailing layout and quantities of geothermal supply piping components including pipe segments and lengths, fitting locations, expansion loops, flexible connections.

2.

Geothermal supply piping shall be laid out to minimize the need for field cutting and welding of piping.

1.05

PRODUCT HANDLING

A.

Pipe shall be handled in conformance with Section 01140.11 of the Oregon Department of Transportation Standard Specifications for Construction, 2021 Edition. Handle pipe to prevent damage to the pipe, pipe lining, or coating. Damage to the pipe, pipe lining, or coating, if any, shall be repaired as directed by the Engineer or replaced at the Contractor’s expense.

B.

At times when pipe laying is not in progress, close the open ends of the pipe with a watertight plug or by other means approved by the Engineer to ensure cleanliness inside the pipe.

PART 2 – PRODUCTS

2.01

PIPE AND FITTINGS

A.

Geothermal Supply (GS) - Pipe and Fittings:

1. Pipe: ASTM A268, TP 304 or TP 316, Schedule 10, seamless stainless steel pipe.

2. Fittings: ASTM A403, Gr. WP304/ANSI 16.9, Butt-weld.

3. Unions: None

4. Flanges: ASTM A182, Gr. F304, ANSI B16.5, 150 lb. standard with 1/16 inch raised face, serrated face finish and welding neck.

5. Bolts: Stud bolts, ASTM A193, Gr. B7.

6. Nuts: ASTM A194, Gr. 2H.

7. Flange Gaskets: Gasket material to be asbestos free and suitable for pressure temperatures and fluid of piping system. Flexitallic spiral wound gaskets Class 150, ASME B16.20 with 304 SS metal winding strip and Flexicarb flexible graphite filler material, Graphonic corrugated metal gaskets Class 150 with 316 SS metal core and flexible graphite sealing element; or approved equal.

B.

Head Pond Supply (HPS) – Polyvinyl Chloride (PVC) Pipe and Fittings:

1. Polyvinyl chloride (PVC) Pipe, 4 inches and larger: PVC pipe for head pond supply shall be Schedule 80 PVC meeting the requirements of ASTM D1785. Pipe shall be listed by Underwriters Laboratory.

2. All PVC Schedule 80 pipe shall be manufactured from a Type I, Grade I Polyvinyl Chloride (PVC) compound with a Cell Classification of 12454 per ASTM D1784. All compound components shall be listed with NSF® and meet the requirements of NSF/ANSI Standard 61-G as suitable for Potable Water and is considered Lead Free.

3. Solvent weld joints with an extra heavy-bodied cement shall be in accordance with ASTM F493.

4. All PVC Schedule 80 fittings shall be produced from PVC materials, cell classification 23447 conforming to ASTM Standard D 1784. All injection molded fittings through 12" shall be manufactured in conformance with ASTM D 2467.

5. All PVC flanges shall be designed and manufactured to meet CL150 bolt pattern per ANSI Standard B16.5.

C.

Adapters, Couplings and Unions: Coupling adapters at tie-ins to existing pipes, if required, shall be Smith Blair or approved equal. Provide dielectric unions and couplings at connections between dissimilar materials.

2.03

EXPANSION LOOPS AND VAULTS

A. Braided flexible expansion loops shall consist of two parallel sections of braided metal hose, a 180 degree return bend, with inlet and outlet 90 degree elbow connections. The loops shall be engineered to move in all three planes, at least 4 inches unless otherwise indicated on the Drawings, and shall impart no thrust loads to system anchors.

B. Materials of construction of the braided metal hoses are to be a type 321 stainless steel with a type 304 stainless steel braid. End fittings shall be consistent with pipe material and connection fittings.

C. Loops shall be designed to meet the design pressure, temperature, and movement requirements for the system. Loops shall be capable of accommodating piping system and equipment movements and vibration as needed.

D. Loops shall be furnished with factory supplied hanger / support lug located at the bottom of the 180 degree return. Also provided at the bottom return will be a plugged FPT to be used for a drain or air release vent.

E. Contractor fabricated support frames shall be provided as indicated on the Drawings.

F. Braided flexible expansion loops shall be Flexicraft Industries, ML Loop.

G. Expansion loop vaults shall be precast concrete with H-20 traffic rated, hinged lids. Vault interior dimensions shall allow for installation of expansion loops and not less than 8 inches of clearance to all flange faces within the vault.

2.04

FLEXIBLE CONNECTORS

A. Braided flexible connectors shall consist of braided metal hose, with inlet and outlet 150# carbon steel plate flange connections. The connectors shall be engineered to move laterally at least ¾ inch, absorb vibration, and shall impart no thrust loads to system anchors.

B. Materials of construction of the braided connector hose to be corrugated stainless steel with a stainless steel braid.

C. Connectors shall be designed to meet the design pressure and temperature requirements for the system.

D. Braided flexible connectors shall be Flexicraft Industries, Model FF.

2.05

VALVES

A.

Gate Valves and Butterfly Valves 3 Inches & Larger 1.

Rating: 150 psi 2.

Body and Disc: Stainless Steel per ASTM A351.

3.

Seat: Hypalon or reinforced Teflon (RTFE) 4.

Ends: Flanged, CL150 bolt pattern per ANSI Standard B16.5 5.

Stem seals: O-ring, NBR 6.

Stem and Pin: Stainless steel

7.

Cold working pressure: 275 psi minimum 8.

Manual Operator: Stem extension and hand wheel for valves within structures, 2-inch square operating nut for buried valve box installation

2.06

VALVE BOX, UTILITY BOX, AND COVERS

A.

Valve Box shall be in accordance with OSS Section 02480.25. Boxes shall be of cast iron, two-piece, slip type standard design, with a base corresponding to the size of the valve. Castings and extensions shall be hot-dipped in asphaltic varnish Royston Roskote #612XM. Manufacturer: Olympic Foundry, or approved equal.

C. Covers shall have the word "WATER" cast in it. Frame and Lid shall be tested for accuracy of fit.

D. Castings shall meet H20 load requirements. Provide 24-inch square, 4-inch thick concrete collar per each valve box.

2.07

CONCRETE FOR THRUST BLOCKS, PADS AND COLLARS

A.

Concrete compressive strength shall be minimum 3,000 psi at 28 days and in conformance with the requirements of Section 03 30 00 – Cast-in-Place Concrete.

2.08

TRACER WIRE

A.

Tracer Wire shall be 12-gauge stranded or solid copper insulated high molecular weight polyethylene (HMW-PE) tracer wire or 12-guage copper clad steel reinforced insulated HMW-PE tracer wire. The HMW-PE insulated cover shall be green and a minimum 45 mil thick. The wire shall be UL rated for 140 °F.

2.09

PIPE SUPPORTS AND PIPE ANCHORS

A.

Steel channels shall conform to the requirements of Section 05 50 00 Metal Fabrications.

B.

U-Bolts shall be Nubolt 316 Stainless Steel U-bolt with UV stable polyshrink, or approved equal.

C.

Pipe bearing surface shall be half round thermoplastic I-rod high temperature material or approved equal.

D.

Provide gripping or non-gripping U-bolts and bearing surfaces as indicated on the Drawings.

PART 3– EXECUTION

3.01

TRENCHING, BEDDING AND BACKFILL

A.

All earthwork related to water piping shall conform to the requirements of Section 31 00 00 – Earthwork, Section 31 23 33 - Trenching and Backfilling and Section 31 23 19 - Dewatering and the details and notes on the Drawings. Provide shoring as necessary to support existing items noted to remain in place.

B.

In the event that water is encountered or accumulates in the trench, it shall be removed during the pipe-laying operation and be maintained in a water-free condition until the ends of the pipe are sealed and provisions are made to prevent floating of the pipe. At no time allow trench water to enter the pipe.

3.02

COORDINATION WITH OTHERS

A.

Prior to starting work coordinate shut downs, demolition, testing, flushing, disinfection and reopening water supply with the Owner.

3.03

LAYING PIPE

A.

General: Construction shall conform to manufacturer instructions and requirements in accordance with Section 01140.41 of the Oregon Department of Transportation Standard Specifications for Construction, 2021 Edition and CPVC manufacturers requirements.

3.04 GEOTHERMAL SUPPLY PIPE INSTALLATION

A.

Install piping free of bends and sags.

B.

Select system components with pressure rating equal to or greater than system operating pressure.

C.

Install drains, consisting of a tee fitting, properly rated NPS 3/4 full port ball valve, and short NPS 3/4 threaded nipple with cap, at low points in piping system mains and elsewhere as required for system drainage.

D.

Install piping, as well as expansion loops, guides and anchors, to allow controlled movement of piping systems and components, and to minimize stresses from same.

E.

Reduce pipe sizes using eccentric reducer fitting installed with level side down.

F.

Install branch, stub or lateral connections to mains using tee fittings in main pipe, with the branch, stub or lateral connected to the main pipe with a braided flexible connector.

G.

Install properly rated strainers on supply side of control valves, and elsewhere as indicated. Install NPS 3/4 nipple and full port ball valve in blowdown connection of strainers NPS 2 and larger. Match size of strainer blow-off connection for strainers smaller than NPS 2.

H.

Strainers ahead of control valves shall be mounted on the side and have blow-off valves.

I.

Install drip legs at low points and natural drainage points such as ends of mains, bottoms of risers, and ahead of control valves.

J.

On straight runs with no natural drainage points, install drip legs at intervals not exceeding 150 feet.

K.

Size drip legs same size as main. In steam mains NPS 6and larger, drip leg size can be reduced, but to no less than NPS 4.

L.

Install dirt pockets of the drip legs and strainer blow downs with gate valves to remove dirt and scale.

M.

Comply with manufacturers recommendations for installation and support of expansion loops and flexible connectors.

3.04

VALVE INSTALLATION

A.

Inspect all valves upon delivery in the field to ensure proper working order before installation. Set and joint to the pipe in the manner set forth in the AWWA Standards for the type of connection ends furnished. Inspect the valves carefully for damage to the outer protective coatings. Where the coating has been ruptured or scraped off, clean the damaged area thoroughly to expose the iron base installation, and recoat the cleaned area with two or more field coats of Quigley Triple A-1 0, Triple A-20, or approved equal.

B.

Install valves in the positions shown on the drawings and provide with a valve box, where required, so arranged that no load or shock will be transmitted to the valve. Center the box over the operating nut, and set the box cover flush with the finished surrounding grade.

C.

After installation, all valves shall be subjected to the field test for piping. If defects in design, materials, or workmanship appear during these tests, correct such defects with the least possible delay as directed by the Engineer.

D.

Valve boxes shall be positioned during backfill to be in a plumb alignment. Valve box shall not rest directly on the body of the valve, or the water main. Set the upper casting flush with finish pavement and align to match grade.

E.

Concrete pad with rebar as shown on the valve details shall be constructed where indicated on the Drawings. Construction, materials and finished of the concrete shall conform to section 03 30 00 – Cast-in-Place Concrete. The concrete pad shall be set flush with the immediately surrounding finished grade.

3.06

MARKING TAPE AND WIRE

A.

Install marking tape and wire over all nonmetallic water lines, including head pond supply, pond discharge pipes and service connections. Place a continuous solid copper wire along the top of all water pipe, including service lines. Use cable ties to secure the copper wire to the top of the pipe at a maximum spacing of 10 feet. Tie all splices and make them electrically continuous and waterproof. Provide access to terminal ends of the wire at all valve boxes and vaults. The result of this installation shall be a continuous wire circuit electrically isolated from ground. Place the marking tape approximately 1 foot above the top of the pipe for its full length.

B.

Make ends of wire accessible in water meter boxes, valve boxes or casings, or as indicated on the Drawings. Provide wire access at locations no more than 1,000 feet apart.

C.

Test for continuity and isolation from ground in the wire after all Work has been completed on the test section. Perform intermediate testing after backfilling operations and prior to surface restoration Work. Test continuity between access locations by use of a temporary wire connecting test points in-line with an ohmmeter. Measure resistance with an approved ohmmeter that has been properly calibrated. The continuity of a test section will be accepted if the resistance of the test section does not exceed 5 ohms for each 500 feet of location wire being tested. Measure isolation from ground with an approved 1000 volt Megger, applied for 1 minute. The isolation of a test section will be accepted if the isolation resistance of the test section is at least 10 megohms. Locate and repair all breaks or defects in the wire and re-test until specified results are obtained.

3.07

FIELD TESTS

A.

Perform hydrostatic testing of head pond supply lines in accordance with Section 01140.51 of the Oregon Department of Transportation Standard Specifications for Construction, 2021 Edition.

B.

Perform hydrostatic testing of geothermal supply lines according to ASME B31.1, “Power Piping” as applicable and as follows:

1. Leave joints, including welds, exposed for examination during test.

2. Provide temporary restraints for expansion loops and flexible connectors that cannot sustain reactions due to test pressure. If temporary restraints are impractical, isolate expansion loops from testing.

3. Flush system with clean water. Clean strainers.

4. Isolate equipment from piping. If a valve is used to isolate equipment, its closure shall be capable of sealing against test pressure without damage to valve. Install blinds in flanged joints to isolate equipment.

5. Use ambient temperature water as a testing medium unless there is risk of damage due to freezing.

6. Subject piping system to hydrostatic test pressure that is not less than 1.5 times the working pressure. Test pressure shall not exceed maximum pressure for any vessel, pump, valve, or other component in system under test. Verify that stress due to pressure at bottom of vertical runs does not exceed 90 percent of specified minimum yield strength.

7. After hydrostatic test pressure has been applied for at least 30 minutes, examine piping, joints, and connections for leakage. Eliminate leaks by tightening, repairing, or replacing components, and repeat hydrostatic test until there are no leaks.

END OF SECTION

Klamath Falls N.F.H.

New National Fish Hatchery

33 10 00 - 1

Klamath Falls N.F.H.

New National Fish Hatchery

33 10 00 - 9