CVG_ATCT_Old_Piping_and_Insulation_Replacement_SOW.doc

U.S. Department of Transportation

Federal Aviation Administration

SPECIFICATIONS

FAA-CSA-10012023

Old HVAC Mechanical Piping and Damaged Pipe Insulation Sections

Removal and Replacement Project at the Air Route Traffic Control Tower (CVG ATCT) 56 New Price Pike, Erlanger (Near Cincinnati, OH), KY 41018

(39.0405821, -84.6591948) November 1, 2023

TABLE OF CONTENTS

1. Statement of Work

2. Contract Schedule

3. Codes and Regulations

4. Contractor Experience

5. Resident Engineer

6. Contractor Warranty

7. Submittals

8. Site Cleanup

9. Safety

10. Utilities

11. Security

12. Product Substitution

13. Site Visit

SPECIFICATIONS FAA-CSA-10012023

1.

Statement of Work

The project is to remove and replace old existing deteriorated HVAC mechanical piping sections and water leak damaged pipe fiberglass insulation (no asbestos containing materials (ACM)) sections at the Covington Air Traffic Control Tower (ATCT) located at 56 New Price Pike, Erlanger, KY 41018.

The contractor shall furnish all materials, equipment, and labor necessary to accomplish this project. The work includes, but not limited to the following:

General Notes:

All work on this project is essential to the operation of National Airspace System (NAS) and contractor performing work on the Hot Water Supply/Return (HWS/R) and Chilled Water Supply/Return (CWS/R) and Condenser Water Supply/Return (COWS/R) piping system must ensure that all supply and return including all accompanying main and isolation valves are always operational while performing the insulation installation work.

The ATCT is a 24/7 operational facility and continuous operation of these piping system is essential to keeping the NAS safe and operational. Any disruption to this piping system or valves will have direct impact and affect the operation of the chilled and condenser water needed to cool the computer system used for NAS. The hot water system is used for occupant comfort.

Contractor shall coordinate each aspect of the work with the Resident Engineer and the local technicians to ensure no disruption to the chilled water and condenser water or to the chiller plant operation occurs. No valves should be operated without prior coordination with the RE.

This project is to remove and replace sections of old deteriorated HVAC mechanical piping sections and pipe fiberglass insulation, damaged because of water leak. This included section of HWS, CWS CWR, CoWS, CoWR located inside the mechanical pipe chase at the CVG ATCT.

Contractor shall replace all mechanical piping and insulation sections in accordance with material and installation methods as described herein.

HVAC Hydronic Piping Replacement:

Remove all old HVAC piping sections as identified in the attached spreadsheet and photos. This includes all HWR, HWS, CWS, CWR, CoWS, and CoW piping. Remove existing insulation as needed to replace the piping.

Coordinate all shutdowns with the RE

Furnish and install all new HVAC piping sections per the attached specifications.

HVAC Piping Insulation Replacement:

Remove all damaged HVAC piping insulation sections as identified in the attached spreadsheet and photos. This includes HWR, HWS, CWS, CWR, CoWS, CoW Contractor shall remove and dispose all damaged insulation sections. Provide onsite dumpster for waste disposal.

Furnish and install 1” inch thick pipe covering/insulation with white all service jacketing (ASJ) on HWS, HWR, CWS/CWR, CoWS and CoWR as per attached specifications.

2.

Specifications

HYDRONIC PIPING

Verify that Section titles referenced in this Section are correct for this Project's Specifications; Section titles may have changed.

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 1 Specification Sections, apply to this Section.

1.2 SUMMARY

A. This Section includes piping, special-duty valves, and hydronic specialties for hot-water heating, chilled-water cooling, and condenser water systems; makeup water for these systems; blowdown drain lines; and condensate drain piping.

B. Related work specified elsewhere:

List below only products, construction, and equipment that the reader might expect to find in this Section but are specified elsewhere.

1. Section 07841 - Through-Penetration Firestop Systems.

2. Section 07920 - Joint Sealants.

3. Section 15050 - Basic Mechanical Materials and Methods.

4. Section 15060 - Hangers and Supports.

5. Section 15110 - Valves.

6. Section 15122 - Meters and Gages.

Retain first subparagraph below if Specification in Division 15 Section "Basic Mechanical Materials and Methods" is insufficient for this Project.

7. Section 15075 - Mechanical Identification.

8. Section 15185 - Hydronic Pumps.

9. Section 15900 - HVAC Instrumentation and Controls.

1.3 REFERENCES

A. Unless noted otherwise, the latest edition/revision of the following publications, in effect as of the date of these Documents, form part of these Specifications to the extent referenced.

1. ASTM A 47: Specification for Ferritic Malleable Iron Castings

2. ASTM A 47M: Specification for Ferritic Malleable Iron Castings [Metric]

3. ASTM A 53: Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless

4. ASTM A 106: Specification for Seamless Carbon Steel Pipe for High-Temperature Service

5. ASTM A 126: Specification for Gray Iron Castings for Valves, Flanges, and Pipe Fittings

6. ASTM A 234/A 234M : Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Moderate and High Temperature Service

7. ASTM A 536: Specification for Ductile Iron Castings

8. ASTM A 733: Specification for Welded and Seamless Carbon Steel and Austenitic Stainless Steel Pipe Nipples

9. ASTM B 32: Specification for Solder Metal

10. ASTM B 88: Specification for Seamless Copper Water Tube

11. ASTM B 88M: Specification for Seamless Copper Water Tube [Metric]

12. ASTM B 306: Standard Specification for Copper Drainage Tube (DWV)

13. ASME B16.1: Cast Iron Pipe Flanges and Flanged Fittings

14. ASME B16.3: Malleable Iron Threaded Fittings

15. ASME B16.4: Cast-Iron Threaded Fittings

16. ASME B16.5: Pipe Flanges and Flanged Fittings, NPS1/2 to NPS24

17. ASME B16.22: Wrought Copper and Copper Alloy Solder Joint Pressure Fittings

18. ASME B16.39: Malleable Iron Threaded Pipe Unions

19. ASME B31.9: Building Services Piping

20. ASME Boiler and Pressure Vessel Code: Section II, Part C, "Welding Rods, Electrodes, and Filler Metals"; Section IV, "Heating Boilers"; Section VIII, "Pressure Vessels"; Section IX, "Welding and Brazing Qualifications"

21. AWS A5.8: Specification for Filler Metals for Brazing and Braze Welding

22. MSS SP-58: Pipe Hangers and Supports—Materials, Design and Manufacture

1.4 DEFINITIONS

Retain abbreviations that remain after this Section has been edited.

A. CPVC: Chlorinated polyvinyl chloride.

B. PVC: Polyvinyl chloride.

1.5 SUBMITTALS

A. Submit in accordance with Conditions of the Contract and Division 1 - General Requirements.

B. Product Data: For each type of special-duty valve indicated. Include flow and pressure drop curves based on manufacturer's testing for diverting fittings, calibrated balancing valves, and automatic flow-control valves.

C. Shop Drawings: CAD-generated and drawn to 1/4 inch equals 1 foot scale. Show fabrication and installation details for hydronic piping.

1. Fabrication, assembly, and installation, including plans, elevations, sections, components, and attachments to other work.

2. Piping layout indicating sizes.

3. Elevations of pipe centerlines.

4. Dimensions of main pipe runs from building grid lines.

5. Fittings.

6. Reinforcement and spacing.

7. Penetrations through fire-rated and other partitions.

8. Equipment installation based on equipment being used on Project.

9. Duct accessories, including access doors and panels.

10. Hangers and supports, including methods for pipe and building attachment, vibration isolation, and seismic restraints.

11. Detail fabrication of pipe anchors, hangers, special pipe support assemblies, alignment guides, expansion joints and loops, and their attachment to the building structure. Detail location of anchors, alignment guides, and expansion joints and loops.

12. Coordination Drawings: Refer to Section 15050 “Basic Mechanical Materials and Methods”.

Retain paragraph below if procedures for welder certification are retained in "Quality Assurance" Article.

D. Welding Certificates: Copies of certificates for welding procedures and personnel.

E. Field Test Reports: Written reports of tests specified in Part 3 of this Section. Include the following:

1. Test procedures used.

2. Test results that comply with requirements.

3. Failed test results and corrective action taken to achieve requirements.

F. Maintenance Data: For hydronic specialties and special-duty valves to include in maintenance manuals specified in Division 1.

Delete below if chemical treatment is specified in Division 15 Section "HVAC Water Treatment."

G. Water Analysis: Submit a copy of the water analysis to illustrate water quality available at Project site.

1.6 QUALITY ASSURANCE

Delete paragraph below if no welding. Retain "Welding Certificates" Paragraph in "Submittals" Article if below is retained.

A. Welding: Qualify processes and operators according to the ASME Boiler and Pressure Vessel Code: Section IX, "Welding and Brazing Qualifications."

B. ASME Compliance: Comply with ASME B31.9, "Building Services Piping," for materials, products, and installation. Safety valves and pressure vessels shall bear the appropriate ASME label. Fabricate and stamp air separators and expansion tanks to comply with the ASME Boiler and Pressure Vessel Code, Section VIII, Division 1.

1.7 COORDINATION

Edit paragraphs below to delete or add types of construction that penetrate or are supported by ceilings.

A. Coordinate layout and installation of hydronic piping and suspension system components with other construction, including light fixtures, HVAC equipment, fire-suppression-system components, and partition assemblies.

B. Coordinate pipe sleeve installations for foundation wall penetrations.

C. Coordinate piping installation with roof curbs, equipment supports, and roof penetrations. Roof specialties are specified in Division 7 Sections.

D. Coordinate pipe fitting pressure classes with products specified in related Sections.

E. Coordinate size and location of concrete bases. Cast anchor-bolt inserts into base. Concrete, reinforcement, and formwork requirements are specified in Division 3 Sections.

F. Coordinate installation of pipe sleeves for penetrations through exterior walls and floor assemblies. Coordinate with requirements for firestopping specified in Section 07841 "Through-Penetration Firestop Systems" for fire and smoke wall and floor assemblies.

1.8 EXTRA MATERIALS

Delete paragraph below for complex projects requiring several types of chemical-treatment systems that are specified in Division 15 Section "HVAC Water Treatment."

Extra materials may not be allowed for publicly funded projects.

Revise below to suit Project.

A. Water Treatment Chemicals: Furnish sufficient chemicals for initial system startup and for preventive maintenance for one year from date of Substantial Completion.

PART 2 - PRODUCTS

2.1 MANUFACTURERS

Retain above for nonproprietary or below for semiproprietary Specification. Refer to Division 1 Section "Materials and Equipment."

A. Manufacturers: Subject to compliance with requirements, provide products by one of the following:

See Editing Instruction No. 1 in the Evaluations for cautions about naming products and manufacturers.

1. Calibrated Balancing Valves:

a. Armstrong Pumps, Inc.

b. Flow Design, Inc.

c. Gerand Engineering Company.

d. Griswold Controls.

e. ITT Bell & Gossett; ITT Fluid Technology Corp.

f. Taco, Inc.

2. Pressure-Reducing Valves:

a. Amtrol, Inc.

b. Armstrong Pumps, Inc.

c. Conbraco Industries, Inc.

d. ITT Bell & Gossett; ITT Fluid Technology Corp.

e. Spence Engineering Company, Inc.

f. Watts Industries, Inc.; Watts Regulators.

3. Safety Valves:

a. Amtrol, Inc.

b. Armstrong Pumps, Inc.

c. Conbraco Industries, Inc.

d. ITT McDonnell & Miller Div.; ITT Fluid Technology Corp.

e. Kunkle Valve Division.

f. Spence Engineering Company, Inc.

4. Expansion Tanks:

a. Amtrol, Inc.

b. Armstrong Pumps, Inc.

c. ITT Bell & Gossett; ITT Fluid Technology Corp.

d. Taco, Inc.

5. Air Separators and Air Purgers:

a. Amtrol, Inc.

b. Armstrong Pumps, Inc.

c. ITT Bell & Gossett; ITT Fluid Technology Corp.

d. Taco, Inc.

2.2 PIPING MATERIALS

See "Writing Guide" Article in the Evaluations for discussion on this Section's organization and on the most efficient way to edit this Section.

A. General: Refer to Part 3 "Piping Applications" Article for applications of pipe and fitting materials.

Coordinate three articles below with "Piping Applications" Article in Part 3. Delete materials not used. The articles include examples of materials listed in the 1996 ASHRAE HANDBOOK--"HVAC Systems and Equipment," Chapter 40, "Pipes, Tubes, and Fittings."

2.3 COPPER TUBE AND FITTINGS

Types M and C in paragraph below have the thinnest wall thicknesses and are not included in the 1996 ASHRAE HANDBOOK--"HVAC Systems and Equipment."

A. Drawn-Temper Copper Tubing: ASTM B 88, Type L.

Type K (Type A) soft temper is used for underground installations. If deleted here, also edit Part 3.

B. Annealed-Temper Copper Tubing: ASTM B 88, Type K.

Type DWV tubing in paragraph below is available in NPS 1-1/4 to NPS 8 (DN 32 to DN 200) and may be used for condensate drains. NPS 2-1/2 and NPS 3-1/2 (DN 65 and DN 90) are not available. Wall thicknesses are thinner than ASTM B 88, Type M (ASTM B 88M, Type C). DWV tubing is intended for nonpressure applications.

C. DWV Copper Tubing: ASTM B 306, Type DWV.

D. Wrought-Copper Fittings: ASME B16.22.

E. Wrought-Copper Unions: ASME B16.22.

See Evaluations for discussions on solder and brazing materials.

F. Solder Filler Metals: ASTM B 32, 95-5 tin antimony.

G. Brazing Filler Metals: AWS A5.8, Classification BAg-1 (silver).

2.4 STEEL PIPE AND FITTINGS

Minimum steel pipe size recommended for hydronic piping is NPS 3/4 (DN 20).

A. Steel Pipe, NPS 2 and Smaller: ASTM A 53, Type S (seamless) or Type F (furnace-butt welded), Grade A, Schedule 40, black steel, plain ends.

B. Steel Pipe, NPS 2-1/2 through NPS 12: ASTM A 53, Type E (electric-resistance welded), Grade A, Schedule 40, black steel, plain ends.

Coordinate flange class with products in other parts of this Section and in related Sections to correlate face size and bolt patterns.

C. Cast-Iron Threaded Fittings: ASME B16.4; Classes 125 and 250.

D. Malleable-Iron Threaded Fittings: ASME B16.3, Classes 150 and 300.

E. Malleable-Iron Unions: ASME B16.39; Classes 150, 250, and 300.

F. Cast-Iron Pipe Flanges and Flanged Fittings: ASME B16.1, Classes 25, 125, and 250; raised ground face, and bolt holes spot faced.

G. Wrought-Steel Fittings: ASTM A 234/A 234M, wall thickness to match adjoining pipe.

Flanges and fittings below are available in several classes, materials, facings, and end connections. Coordinate with Project requirements.

H. Wrought Cast- and Forged-Steel Flanges and Flanged Fittings: ASME B16.5, including bolts, nuts, and gaskets of the following material group, end connections, and facings:

1. Material Group: 1.1.

2. End Connections: Butt welding.

3. Facings: Raised face.

Retain first paragraph below for small pipe sizes. Allow sufficient length for installation. Where space is limited and for larger piping applications, consider using flexible joints and spherical connectors.

Combinations of grooved mechanical-joint couplings and short nipples may also be used. Refer to Victaulic Company of America's technical information.

I. Flexible Connectors: Stainless-steel bellows with woven, flexible, bronze, wire-reinforcing protective jacket; 150-psig minimum working pressure and 250 deg F maximum operating temperature. Connectors shall have flanged or threaded-end connections to match equipment connected and shall be capable of 3/4-inch misalignment.

J. Spherical, Rubber, Flexible Connectors: Fiber-reinforced rubber body with steel flanges drilled to align with Classes 150 and 300 steel flanges; operating temperatures up to 250 deg F and pressures up to 150 psig.

K. Packed, Slip, Expansion Joints: 150-psig minimum working pressure, steel pipe fitting consisting of telescoping body and slip-pipe sections, packing ring, packing, limit rods, flanged ends, and chrome-plated finish on slip-pipe telescoping section.

L. Welding Materials: Comply with Section II, Part C, of the ASME Boiler and Pressure Vessel Code for welding materials appropriate for wall thickness and for chemical analysis of pipe being welded.

M. Gasket Material: Thickness, material, and type suitable for fluid to be handled; and design temperatures and pressures.

2.5 VALVES

A. Gate, globe, check, ball, and butterfly valves are specified in Section 15110 "Valves."

B. Refer to Part 3 "Valve Applications" Article for applications of each valve.

C. Calibrated Balancing Valves, NPS 2 and Smaller: Bronze body, ball type, 125-psig working pressure, 250 deg F maximum operating temperature, and having threaded ends. Valves shall have calibrated orifice or venturi, connections for portable differential pressure meter with integral seals, and be equipped with a memory stop to retain set position.

D. Calibrated Balancing Valves, NPS 2-1/2 and Larger: Cast-iron or steel body, ball type, 125-psig working pressure, 250 deg F maximum operating temperature, and having flanged or grooved connections. Valves shall have calibrated orifice or venturi, connections for portable differential pressure meter with integral seals, and be equipped with a memory stop to retain set position.

E. Pressure-Reducing Valves: Diaphragm-operated, bronze or brass body with low inlet pressure check valve, inlet strainer removable without system shutdown, and noncorrosive valve seat and stem. Select valve size, capacity, and operating pressure to suit system. Valve shall be factory set at operating pressure and have capability for field adjustment.

F. Safety Valves: Diaphragm-operated, bronze or brass body with brass and rubber, wetted, internal working parts; shall suit system pressure and heat capacity and shall comply with the ASME Boiler and Pressure Vessel Code, Section IV.

2.6 HYDRONIC SPECIALTIES

Automatic air vents may cause damage to ceilings and other finished surfaces. Air vents aid in system filling. Air removal after initial startup is accomplished by air separator or boiler dip-tube. Manual air vents may be a better solution.

A. Manual Air Vent: Bronze body and nonferrous internal parts; 150-psig working pressure; 225 deg F operating temperature; manually operated with screwdriver or thumbscrew; with NPS 1/8 discharge connection and NPS 1/2 inlet connection.

B. Automatic Air Vent: Designed to vent automatically with float principle; bronze body and nonferrous internal parts; 150-psig working pressure; 240 deg F operating temperature; with NPS 1/4 discharge connection and NPS 1/2 inlet connection.

Select one of two paragraphs and associated subparagraphs below according to system capacity and space availability. Bladder-type tanks and diaphragm-type tanks can be mounted anywhere on the floor.

C. Expansion Tanks: Welded carbon steel, rated for 125-psig working pressure and 375 deg F maximum operating temperature. Separate air charge from system water to maintain design expansion capacity by a flexible diaphragm or bladder securely sealed into tank. Include drain fitting and taps for pressure gage and air-charging fitting. Support vertical tanks with steel legs or base; support horizontal tanks with steel saddles. Factory fabricate and test tank with taps and supports installed and labeled according to the ASME Boiler and Pressure Vessel Code, Section VIII, Division 1.

Select one of three paragraphs below according to system capacity.

D. Tangential-Type Air Separators: Welded black steel; ASME constructed and labeled for 125-psig minimum working pressure and 375 deg F maximum operating temperature; perforated stainless-steel air collector tube designed to direct released air into expansion tank; tangential inlet and outlet connections; threaded connections for NPS 2 and smaller; flanged connections for NPS 2-1/2 and larger; threaded blow-down connection. Provide units in sizes for full-system flow capacity.

Delete paragraph below for complex projects requiring several types of chemical-treatment systems that are specified in Division 15 Section "HVAC Water Treatment."

E. Bypass Chemical Feeder: Welded steel construction; 125-psig working pressure; 5-gal. capacity; with fill funnel and inlet, outlet, and drain valves.

1. Chemicals: Specially formulated, based on analysis of makeup water, to prevent accumulation of scale and corrosion in piping and connected equipment.

Fitting in paragraph below is used where a single pipe acts as both supply and return, such as a branch supply line at a convector or finned-tube radiation. These fittings are available in NPS 3/4 to NPS 2 (DN 20 to DN 50).

F. Diverting Fittings: 125-psig working pressure; 250 deg F maximum operating temperature; cast-iron body with threaded ends, or wrought copper with soldered ends. Indicate flow direction on fitting.

G. Y-Pattern Strainers: 125-psig working pressure; cast-iron body (ASTM A 126, Class B), flanged ends for NPS 2-1/2 and larger, threaded connections for NPS 2 and smaller, bolted cover, perforated stainless-steel basket, and bottom drain connection.

Retain first paragraph below for small pipe sizes. Allow sufficient length for installation. Where space is limited and for larger piping applications, consider using flexible joints and spherical connectors.

Combinations of grooved mechanical-joint couplings and short nipples may also be used. Refer to Victaulic Company of America's technical information.

H. Flexible Connectors: Stainless-steel bellows with woven, flexible, bronze, wire-reinforcing protective jacket; 150-psig minimum working pressure and 250 deg F maximum operating temperature. Connectors shall have flanged- or threaded-end connections to match equipment connected and shall be capable of 3/4-inch misalignment.

I. Spherical, Rubber, Flexible Connectors: Fiber-reinforced rubber body with steel flanges drilled to align with Classes 150 and 300 steel flanges; operating temperatures up to 250 deg F and pressures up to 150 psig.

PART 3 - EXECUTION

3.1 PIPING APPLICATIONS

Coordinate applications below with materials specified in Part 2 of this Section. Pipe sizes at which joining methods change are between NPS 2 and NPS 2-1/2 (DN 50 and DN 65). Adjust this change point to suit personal preference.

Materials and joining methods for applications below are as listed in the 1996 ASHRAE HANDBOOK-- "HVAC Systems and Equipment," Chapter 42, "Pipes, Tubes, and Fittings." See Editing Instruction No. 2 in the Evaluations for discussion on selecting piping materials.

Soldered joints for pipes larger than NPS 2 (DN 50) may not meet system pressures.

A. Hot and Chilled Water, NPS 2 and Smaller: Aboveground, use Type L drawn-temper copper tubing with soldered joints or Schedule 40 steel pipe with threaded joints. Belowground or within slabs, use Type K annealed-temper copper tubing with soldered joints. Use the fewest possible joints belowground and within floor slabs.

Retain first paragraph below for projects where pipes are NPS 3 (DN 80) and smaller and copper is the only material allowed. Coordinate with Part 2 of this Section.

B. Hot and Chilled Water, NPS 2-1/2 and Larger: Schedule 40 steel pipe with welded and flanged joints.

Retain paragraph below when project is limited to NPS 2 (DN 50) and smaller to allow copper tubing.

C. Diesel Engine Cooling Water: For NPS 2 and smaller, use Schedule 40 steel pipe with threaded joints; for NPS 2-1/2 and larger, use Schedule 40 steel pipe with welded joints.

D. Condensate Drain Lines: Type L drawn-temper copper tubing with soldered joints or Schedule 40, PVC pipe with solvent-welded joints.

3.2 VALVE APPLICATIONS

A. General-Duty Valve Applications: Unless otherwise indicated, use the following valve types:

1. Shutoff Duty: Ball, and butterfly valves.

2. Throttling Duty: Ball, and butterfly valves.

B. Install shutoff duty valves at each branch connection to supply mains, at supply connection to each piece of equipment, unless only one piece of equipment is connected in the branch line. Install throttling duty valves at each branch connection to return mains, at return connections to each piece of equipment, and elsewhere as indicated.

C. Install calibrated balancing valves in the return water line of each heating or cooling element and elsewhere as required to facilitate system balancing.

D. Install check valves at each pump discharge and elsewhere as required to control flow direction.

E. Install safety valves on hot-water generators and elsewhere as required by the ASME Boiler and Pressure Vessel Code. Install safety-valve discharge piping, without valves, to floor. Comply with the ASME Boiler and Pressure Vessel Code, Section VIII, Division 1, for installation requirements.

F. Install pressure-reducing valves on hot-water generators and elsewhere as required to regulate system pressure.

3.3 PIPING INSTALLATIONS

A. Refer to Section 15050 "Basic Mechanical Materials and Methods" for basic piping installation requirements.

B. Install groups of pipes parallel to each other, spaced to permit applying insulation and servicing of valves.

C. Install drains, consisting of a tee fitting, NPS 3/4 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 at a uniform grade of 0.2 percent upward in direction of flow.

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

F. Unless otherwise indicated, install branch connections to mains using tee fittings in main pipe, with the takeoff coming out the bottom of the main pipe. For up-feed risers, install the takeoff coming out the top of the main pipe.

G. Install strainers on supply side of each control valve, pressure-reducing valve, solenoid valve, in-line pump, and elsewhere as indicated. Install NPS 3/4 nipple and ball valve in blowdown connection of strainers NPS 2 and larger. Match size of strainer blowoff connection for strainers smaller than NPS 2.

H. Anchor piping for proper direction of expansion and contraction.

3.4 HANGERS AND SUPPORTS

Piping support must account for expansion and contraction, vibration, and dead load of piping and its contents, and seismic bracing requirements.

A. Hanger, support, and anchor devices are specified in Section 15060 "Hangers and Supports." Comply with requirements below for maximum spacing of supports.

B. Install the following pipe attachments:

1. Adjustable steel clevis hangers for individual horizontal piping less than 20 feet long.

2. Adjustable roller hangers and spring hangers for individual horizontal piping 20 feet or longer.

3. Pipe Roller: MSS SP-58, Type 44 for multiple horizontal piping 20 feet or longer, supported on a trapeze.

4. Spring hangers to support vertical runs.

5. On plastic pipe, install pads or cushions on bearing surfaces to prevent hanger from scratching pipe.

Verify actual supported loads for hanger sizes and spacing. Consult structural engineer. Spacing and sizes below are from the 1996 ASHRAE HANDBOOK--"HVAC Systems and Equipment."

C. Install hangers for steel piping with the following maximum spacing and minimum rod sizes:

1. NPS 3/4: Maximum span, 7 feet; minimum rod size, 1/4 inch.

2. NPS 1: Maximum span, 7 feet; minimum rod size, 1/4 inch.

3. NPS 1-1/2: Maximum span, 9 feet; minimum rod size, 3/8 inch.

4. NPS 2: Maximum span, 10 feet; minimum rod size, 3/8 inch.

5. NPS 2-1/2: Maximum span, 11 feet; minimum rod size, 3/8 inch.

6. NPS 3: Maximum span, 12 feet; minimum rod size, 3/8 inch.

7. NPS 4: Maximum span, 14 feet; minimum rod size, 1/2 inch.

8. NPS 6: Maximum span, 17 feet; minimum rod size, 1/2 inch.

9. NPS 8: Maximum span, 19 feet; minimum rod size, 5/8 inch.

10. NPS 10: Maximum span, 20 feet; minimum rod size, 3/4 inch.

11. NPS 12: Maximum span, 23 feet; minimum rod size, 7/8 inch.

12. NPS 14: Maximum span, 25 feet; minimum rod size, 1 inch.

13. NPS 16: Maximum span, 27 feet; minimum rod size, 1 inch.

14. NPS 18: Maximum span, 28 feet; minimum rod size, 1-1/4 inches.

15. NPS 20: Maximum span, 30 feet; minimum rod size, 1-1/4 inches.

D. Install hangers for drawn-temper copper piping with the following maximum spacing and minimum rod sizes:

1. NPS 3/4: Maximum span, 5 feet; minimum rod size, 1/4 inch.

2. NPS 1: Maximum span, 6 feet; minimum rod size, 1/4 inch.

3. NPS 1-1/2: Maximum span, 8 feet; minimum rod size, 3/8 inch.

4. NPS 2: Maximum span, 8 feet; minimum rod size, 3/8 inch.

5. NPS 2-1/2: Maximum span, 9 feet; minimum rod size, 3/8 inch.

6. NPS 3: Maximum span, 10 feet; minimum rod size, 3/8 inch.

E. Support vertical runs at roof, at each floor, and at 10-foot intervals between floors.

3.5 PIPE JOINT CONSTRUCTION

A. Refer to Section 15050 "Basic Mechanical Materials and Methods" for joint construction requirements for soldered and brazed joints in copper tubing; threaded, welded, and flanged joints in steel piping.

3.6 HYDRONIC SPECIALTIES INSTALLATION

A. Install manual air vents at high points in piping, at heat-transfer coils, and elsewhere as required for system air venting.

Automatic air vents may cause damage to ceilings and other finished surfaces. Air vents aid in system filling. Air removal after initial startup is accomplished by air separator or boiler dip-tube. Manual air vents may be a better solution.

B. Install automatic air vents in mechanical equipment rooms only at high points of system piping, at heat-transfer coils, and elsewhere as required for system air venting.

Select one of three paragraphs below according to air separator specified in Part 2.

C. Install dip-tube fittings in boiler outlet. Install piping to expansion tank with a 2 percent upward slope toward tank. Connect boiler-outlet piping.

D. Install combination air separator and strainer in pump suction lines. Install piping to compression tank with a 2 percent upward slope toward tank. Install blowdown piping with ball valve; extend to nearest drain.

Delete paragraph below if Division 15 Section "HVAC Water Treatment" is used. Coordinate location of an equipment drain near feeder locations.

E. Install bypass chemical feeders in each hydronic system where indicated, in upright position with top of funnel not more than 48 inches above floor. Install feeder in bypass line, off main, using globe valves on each side of feeder and in the main between bypass connections. Pipe drain, with ball valve, to nearest equipment drain.

Select one of two paragraphs and associated subparagraph below.

F. Install expansion tanks above air separator. Install gage glass and cocks on end of tank. Install tank fitting in tank bottom and charge tank. Use manual vent for initial fill to establish proper water level in tank.

1. Support tank from floor or structure above with sufficient strength to carry weight of tank, piping connections, and fittings, plus weight of a full tank of water. Do not overload building components and structural members.

3.7 TERMINAL EQUIPMENT CONNECTIONS

A. Size for supply and return piping connections shall be same as for equipment connections.

B. Install control valves in accessible locations close to connected equipment.

C. Install bypass piping with ball valve around control valve. If multiple, parallel control valves are installed, only one bypass is required.

D. Install ports for pressure and temperature gages at coil inlet connections.

3.8 CHEMICAL TREATMENT

Delete this Article if Division 15 Section "HVAC Water Treatment" is used.

Delete first paragraph and subparagraphs below if water analysis has been or will be conducted by Owner.

1. Perform an analysis of supply water to determine the type and quantities of chemical treatment needed to keep system free of scale, corrosion, and fouling.

B. Fill system and perform initial chemical treatment.

3.9 FIELD QUALITY CONTROL

A. Prepare hydronic piping according to ASME B31.9 and as follows:

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

2. Provide temporary restraints for expansion joints that cannot sustain reactions due to test pressure. If temporary restraints are impractical, isolate expansion joints 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. Install safety valve, set at a pressure no more than one-third higher than test pressure, to protect against damage by expanding liquid or other source of overpressure during test.

Procedures below are paraphrased from ASME B31.9.

B. Perform the following tests on hydronic piping:

1. Use ambient temperature water as a testing medium unless there is risk of damage due to freezing. Another liquid that is safe for workers and compatible with piping may be used.

2. While filling system, use vents installed at high points of system to release trapped air. Use drains installed at low points for complete draining of liquid.

3. Check expansion tanks to determine that they are not air bound and that system is full of water.

4. Subject piping system to hydrostatic test pressure that is not less than 1.5 times the design 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 either 90 percent of specified minimum yield strength or 1.7 times "SE" value in Appendix A of ASME B31.9, "Building Services Piping."

5. After hydrostatic test pressure has been applied for at least 10 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.

6. Prepare written report of testing.

3.10 ADJUSTING

A. Mark calibrated nameplates of pump discharge valves after hydronic system balancing has been completed, to permanently indicate final balanced position.

B. Perform these adjustments before operating the system:

1. Open valves to fully open position. Close coil bypass valves.

2. Check pump for proper direction of rotation.

3. Set automatic fill valves for required system pressure.

4. Check air vents at high points of system and determine if all are installed and operating freely (automatic type), or bleed air completely (manual type).

5. Set temperature controls so all coils are calling for full flow.

6. Check operation of automatic bypass valves.

7. Check and set operating temperatures of boilers and chillers to design requirements.

8. Lubricate motors and bearings.

3.11 CLEANING

A. Flush hydronic piping systems with clean water. Remove and clean or replace strainer screens. After cleaning and flushing hydronic piping systems, but before balancing, remove disposable fine-mesh strainers in pump suction diffusers.

VALVES

PART 4 - GENERAL

4.1 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 1 Specification Sections, apply to this Section.

4.2 SUMMARY

A. This Section includes the following general-duty valves:

1. Copper-alloy ball valves.

2. Ferrous-alloy butterfly valves.

3. Bronze check valves.

4. Gray-iron swing check valves.

5. Cast-iron gate valves.

6. Chainwheel actuators.

B. Related work specified elsewhere:

1. Division 2 piping Sections for general-duty and specialty valves for site construction piping.

2. Section 13915 - Fire-Suppression Piping.

3. Section 15075 - Mechanical Identification.

4. Division 15 piping Sections for specialty valves applicable to those Sections only.

5. Section 15900 – HVAC Instrumentation and Controls.

4.3 REFERENCES

A. Unless noted otherwise, the latest edition/revision of the following publications, in effect as of the date of these Documents, form part of these Specifications to the extent referenced.

1. ASTM B 32: Specification for Solder Metal

2. ASTM B 813: Specification for Liquid and Paste Fluxes for Soldering Applications of Copper and Copper Alloy Tube

3. ASTM B 828: Practice for Making Capillary Joints by Soldering of Copper and Copper Alloy Tube and Fittings

4. ASME B1.20.1: Pipe Threads, General Purpose (Inch)

5. ASME B16.1: Cast Iron Pipe Flanges and Flanged Fittings

6. ASME B16.5: Pipe Flanges and Flanged Fittings

7. ASME B16.10: Face-to-Face and End-to-End Dimensions of Valves

8. ASME B16.18: Cast Copper Alloy Solder Joint Pressure Fittings

9. ASME B16.24: Cast Copper Alloy Pipe Flanges, Class 150, 300, 400, 600, 900, 1500, and 2500, and Flanged Fittings, Class 150 and 300

10. ASME B16.34: Valves—Flanged, Threaded, and Welding End

11. SME B31.1: Power Piping

12. ASME B31.9: Building Services Piping

13. MSS SP-45: Bypass and Drain Connections

14. MSS SP-67: Butterfly Valves

15. MSS SP-68: High Pressure Butterfly Valves with Offset Design

16. MSS SP-70: Cast Iron Gate Valves, Flanged and Threaded Ends

17. MSS SP-71: Gray Iron Swing Check Valves, Flanged and Threaded Ends

18. MSS SP-72: Ball Valves with Flanged or Butt-Welding Ends for General Service

19. MSS SP-80: Bronze Gate, Globe, Angle and Check Valves

20. NSF 61-97b: Drinking Water System Components—Health Effects, Sections 1 through 9

4.4 DEFINITIONS

A. The following are standard abbreviations for valves:

1. CWP: Cold working pressure.

2. EPDM: Ethylene-propylene-diene terpolymer rubber.

3. NBR: Acrylonitrile-butadiene rubber.

4. PTFE: Polytetrafluoroethylene plastic.

5. SWP: Steam working pressure.

6. TFE: Tetrafluoroethylene plastic.

4.5 SUBMITTALS

A. Submit in accordance with Conditions of the Contract and Division 1 - General Requirements.

B. Product Data: For each type of valve indicated. Include body, seating, and trim materials; valve design; pressure and temperature classifications; end connections; arrangement; dimensions; and required clearances. Include list indicating valve and its application. Include rated capacities; shipping, installed, and operating weights; furnished specialties; and accessories.

4.6 QUALITY ASSURANCE

A. ASME Compliance: ASME B31.9 for building services piping valves.

1. Exceptions: Domestic hot- and cold-water piping valves unless referenced.

B. ASME Compliance for Ferrous Valves: ASME B16.10 and ASME B16.34 for dimension and design criteria.

C. NSF Compliance: NSF 61 for valve materials for potable-water service.

4.7 DELIVERY, STORAGE, AND HANDLING

A. Prepare valves for shipping as follows:

1. Protect internal parts against rust and corrosion.

2. Protect threads, flange faces, grooves, and weld ends.

3. Set gate valves closed to prevent rattling.

4. Set ball valves open to minimize exposure of functional surfaces.

5. Set butterfly valves closed or slightly open.

6. Block check valves in either closed or open position.

B. Use the following precautions during storage:

1. Maintain valve end protection.

2. Store valves indoors and maintain at higher than ambient dew-point temperature. If outdoor storage is necessary, store valves off the ground in watertight enclosures.

C. Use sling to handle large valves; rig sling to avoid damage to exposed parts. Do not use handwheels or stems as lifting or rigging points.

PART 5 - PRODUCTS

5.1 MANUFACTURERS

A. In other Part 2 articles where subparagraph titles below introduce lists, the following requirements apply for product selection:

1. Manufacturers: Subject to compliance with requirements, provide products by the manufacturers specified.

5.2 VALVES, GENERAL

A. Refer to Part 3 "Valve Applications" Article for applications of valves.

B. Bronze Valves: NPS 2 and smaller with threaded ends, unless otherwise indicated.

C. Ferrous Valves: NPS 2-1/2 and larger with flanged ends, unless otherwise indicated.

D. Valve Pressure and Temperature Ratings: Not less than indicated and as required for system pressures and temperatures.

E. Valve Sizes: Same as upstream pipe, unless otherwise indicated.

F. Valve Actuators:

1. Chainwheel: For attachment to valves, of size and mounting height, as indicated in the "Valve Installation" Article in Part 3.

2. Gear Drive: For quarter-turn valves NPS 8 and larger.

3. Handwheel: For valves other than quarter-turn types.

4. Lever Handle: For quarter-turn valves NPS 6 and smaller, except plug valves.

5. Wrench: For plug valves with square heads. Furnish FAA with 1 wrench for every 10 plug valves, for each size square plug head.

G. Extended Valve Stems: On insulated valves.

H. Valve Flanges: ASME B16.1 for cast-iron valves, ASME B16.5 for steel valves, and ASME B16.24 for bronze valves.

I. Valve Bypass and Drain Connections: MSS SP-45.

5.3 COPPER-ALLOY BALL VALVES

A. Manufacturers:

1. Two-Piece, Copper-Alloy Ball Valves:

a. Conbraco Industries, Inc.; Apollo Div.

b. Crane Co.; Crane Valve Group; Jenkins Valves.

c. Crane Co.; Crane Valve Group; Stockham Div.

d. Grinnell Corporation.

e. Jamesbury, Inc.

f. NIBCO INC.

g. Watts Industries, Inc.; Water Products Div.

B. Copper-Alloy Ball Valves, General: MSS SP-110.

C. Two-Piece, Copper-Alloy Ball Valves: Brass or bronze body with full-port, chrome-plated bronze ball; PTFE or TFE seats; and 600-psig minimum CWP rating and blowout-proof stem.

5.4 FERROUS-ALLOY BUTTERFLY VALVES

A. Manufacturers:

1. Flangeless, Ferrous-Alloy Butterfly Valves:

a. Crane Co.; Crane Valve Group; Stockham Div.

b. Grinnell Corporation.

c. Milwaukee Valve Company.

d. NIBCO INC.

e. Tyco International, Ltd.; Tyco Valves & Controls.

f. Watts Industries, Inc.; Water Products Div.

2. Single-Flange, Ferrous-Alloy Butterfly Valves:

a. Crane Co.; Crane Valve Group; Jenkins Valves.

b. Crane Co.; Crane Valve Group; Stockham Div.

c. Grinnell Corporation.

d. Milwaukee Valve Company.

e. NIBCO INC.

f. Tyco International, Ltd.; Tyco Valves & Controls.

g. Watts Industries, Inc.; Water Products Div.

3. Flanged, Ferrous-Alloy Butterfly Valves:

a. Grinnell Corporation.

b. Tyco International, Ltd.; Tyco Valves & Controls.

B. Ferrous-Alloy Butterfly Valves, General: MSS SP-67, Type I, for tight shutoff, with disc and lining suitable for potable water, unless otherwise indicated.

C. Flangeless, 150-psig CWP Rating, Ferrous-Alloy Butterfly Valves: Wafer type with one- or two-piece stem.

D. Flangeless, 300-psig CWP Rating, Ferrous-Alloy Butterfly Valves: Wafer type with one- or two-piece stem.

E. Single-Flange, 150-psig CWP Rating, Ferrous-Alloy Butterfly Valves: Wafer-lug type with one- or two-piece stem.

F. Single-Flange, 300-psig CWP Rating, Ferrous-Alloy Butterfly Valves: Wafer-lug type with one- or two-piece stem.

G. Flanged, 150-psig CWP Rating, Ferrous-Alloy Butterfly Valves: Flanged-end type with one- or two-piece stem.

H. Flanged, 300-psig CWP Rating, Ferrous-Alloy Butterfly Valves: Flanged-end type with one- or two-piece stem.

I. Grooved-End, 175-psig CWP Rating, Ferrous-Alloy Butterfly Valves: Ductile-iron or steel body with grooved or shouldered ends.

J. Grooved-End, 300-psig CWP Rating, Ferrous-Alloy Butterfly Valves: Ductile-iron or steel body with grooved or shouldered ends.

5.5 BRONZE CHECK VALVES

A. Manufacturers:

1. Type 1, Bronze, Horizontal Lift Check Valves with Metal Disc:

a. Cincinnati Valve Co.

b. Crane Co.; Crane Valve Group; Crane Valves.

c. Crane Co.; Crane Valve Group; Stockham Div.

2. Type 2, Bronze, Horizontal Lift Check Valves with Nonmetallic Disc:

a. Cincinnati Valve Co.

b. Crane Co.; Crane Valve Group; Crane Valves.

c. Crane Co.; Crane Valve Group; Jenkins Valves.

d. Crane Co.; Crane Valve Group; Stockham Div.

3. Type 1, Bronze, Vertical Lift Check Valves with Metal Disc:

a. Cincinnati Valve Co.

b. Crane Co.; Crane Valve Group; Crane Valves.

c. Crane Co.; Crane Valve Group; Jenkins Valves.

4. Type 2, Bronze, Vertical Lift Check Valves with Nonmetallic Disc:

a. Grinnell Corporation.

b. Milwaukee Valve Company.

5. Type 3, Bronze, Swing Check Valves with Metal Disc:

a. Cincinnati Valve Co.

b. Crane Co.; Crane Valve Group; Crane Valves.

c. Crane Co.; Crane Valve Group; Jenkins Valves.

d. Crane Co.; Crane Valve Group; Stockham Div.

e. Grinnell Corporation.

f. Milwaukee Valve Company.

g. NIBCO INC.

h. Watts Industries, Inc.; Water Products Div.

6. Type 4, Bronze, Swing Check Valves with Nonmetallic Disc:

a. Cincinnati Valve Co.

b. Crane Co.; Crane Valve Group; Crane Valves.

c. Crane Co.; Crane Valve Group; Jenkins Valves.

d. Crane Co.; Crane Valve Group; Stockham Div.

e. Grinnell Corporation.

f. Milwaukee Valve Company.

g. NIBCO INC.

h. Watts Industries, Inc.; Water Products Div.

B. Bronze Check Valves, General: MSS SP-80.

C. Type 1, Class 150, Bronze, Horizontal Lift Check Valves: Bronze body with bronze disc and seat.

D. Type 1, Class 150, Bronze, Vertical Lift Check Valves: Bronze body with bronze disc and seat.

E. Type 2, Class 150, Bronze, Horizontal Lift Check Valves: Bronze body with nonmetallic disc and bronze seat.

F. Type 2, Class 150, Bronze, Vertical Lift Check Valves: Bronze body with nonmetallic disc and bronze seat.

G. Type 3, Class 150, Bronze, Swing Check Valves: Bronze body with bronze disc and seat.

H. Type 4, Class 150, Bronze, Swing Check Valves: Bronze body with nonmetallic disc and bronze seat.

5.6 CAST-IRON GATE VALVES

A. Manufacturers:

1. Type I, Cast-Iron, Nonrising-Stem Gate Valves:

a. Crane Co.; Crane Valve Group; Jenkins Valves.

b. Crane Co.; Crane Valve Group; Stockham Div.

c. Grinnell Corporation.

d. Hammond Valve.

e. Milwaukee Valve Company.

f. NIBCO INC.

g. Watts Industries, Inc.; Water Products Div.

2. Type I, Cast-Iron, Rising-Stem Gate Valves:

a. Crane Co.; Crane Valve Group; Jenkins Valves.

b. Crane Co.; Crane Valve Group; Stockham Div.

c. Grinnell Corporation.

d. Hammond Valve.

e. Milwaukee Valve Company.

f. NIBCO INC.

g. Watts Industries, Inc.; Water Products Div.

B. Cast-Iron Gate Valves, General: MSS SP-70, Type I.

C. Class 125, NRS, Bronze-Mounted, Cast-Iron Gate Valves: Cast-iron body with bronze trim, nonrising stem, and solid-wedge disc.

D. Class 125, OS&Y, Bronze-Mounted, Cast-Iron Gate Valves: Cast-iron body with bronze trim, rising stem, and solid-wedge disc.

E. Class 250, NRS, Bronze-Mounted, Cast-Iron Gate Valves: Cast-iron body with bronze trim, nonrising stem, and solid-wedge disc.

F. Class 250, OS&Y, Bronze-Mounted, Cast-Iron Gate Valves: Cast-iron body with bronze trim, rising stem, and solid-wedge disc.

5.7 GRAY-IRON SWING CHECK VALVES

A. Manufacturers:

1. Type I, Gray-Iron Swing Check Valves with Metal Seats:

a. Cincinnati Valve Co.

b. Crane Co.; Crane Valve Group; Crane Valves.

c. Crane Co.; Crane Valve Group; Jenkins Valves.

d. Crane Co.; Crane Valve Group; Stockham Div.

e. Grinnell Corporation.

f. Milwaukee Valve Company.

g. NIBCO INC.

h. Watts Industries, Inc.; Water Products Div.

2. Type II, Gray-Iron Swing Check Valves with Composition to Metal Seats:

a. Crane Co.; Crane Valve Group; Crane Valves.

b. Crane Co.; Crane Valve Group; Stockham Div.

c. Watts Industries, Inc.; Water Products Div.

3. Grooved-End, Ductile-Iron Swing Check Valves:

a. Grinnell Corporation.

b. Victaulic Co. of America.

B. Gray-Iron Swing Check Valves, General: MSS SP-71.

C. Type I, Class 250, gray-iron, swing check valves with metal seats.

D. Type II, Class 250, gray-iron, swing check valves with composition to metal seats.

E. 300-psig CWP Rating, Grooved-End, Swing Check Valves: Ductile-iron body with grooved or shouldered ends.

5.8 CHAINWHEEL ACTUATORS

A. Available Manufacturers:

B. Manufacturers:

1. Babbitt Steam Specialty Co.

2. Roto Hammer Industries, Inc.

C. Description: Valve actuation assembly with sprocket rim, brackets, and chain.

1. Sprocket Rim with Chain Guides: Cast iron, of type and size required for valve.

2. Brackets: Type, number, size, and fasteners required to mount actuator on valve.

3. Chain: Hot-dip, galvanized steel, of size required to fit sprocket rim.

PART 6 - EXECUTION

6.1 EXAMINATION

A. Examine piping system for compliance with requirements for installation tolerances and other conditions affecting performance.

1. Proceed with installation only after unsatisfactory conditions have been corrected.

B. Examine valve interior for cleanliness, freedom from foreign matter, and corrosion. Remove special packing materials, such as blocks, used to prevent disc movement during shipping and handling.

C. Operate valves in positions from fully open to fully closed. Examine guides and seats made accessible by such operations.

D. Examine threads on valve and mating pipe for form and cleanliness.

E. Examine mating flange faces for conditions that might cause leakage. Check bolting for proper size, length, and material. Verify that gasket is of proper size, that its material composition is suitable for service, and that it is free from defects and damage.

F. Do not attempt to repair defective valves; replace with new valves.

6.2 VALVE APPLICATIONS

A. Refer to piping Sections for specific valve applications. If valve applications are not indicated, use the following:

1. Shutoff Service: Ball, butterfly valves.

2. Throttling Service: Ball, butterfly valves.

3. Pump Discharge: Spring-loaded, lift-disc check valves.

B. If valves with specified SWP classes or CWP ratings are not available, the same types of valves with higher SWP class or CWP ratings may be substituted.

C. Chilled-Water Piping: Use the following types of valves:

1. Ball Valves, NPS 2 and Smaller: Two-piece, 400-psig CWP rating, copper alloy.

2. Butterfly Valves, NPS 2-1/2 and Larger: Flangeless, Single-flange, and Flanged, 150-psig or 300-psig CWP rating, ferrous alloy, with EPDM liner.

3. Swing Check Valves, NPS 2 and Smaller: Type 4, Class 125 or 200, bronze.

4. Swing Check Valves, NPS 2-1/2 and Larger: Type II, Class 125 or 250, gray iron.

D. Domestic Water Piping: Use the following types of valves:

1. Ball Valves, NPS 2 and Smaller: Two-piece, 400-psig, 600-psig CWP rating, copper alloy.

2. Ball Valves, NPS 2-1/2 and Larger: Class 150, ferrous alloy.

3. Butterfly Valves, NPS 2-1/2 and Larger: Flanged, 250-psig, 300-psig CWP rating, ferrous alloy, with EPDM liner.

4. Lift Check Valves, NPS 2 and Smaller: Type 2, Class 125, 150, 200, horizontal or vertical, bronze.

5. Swing Check Valves, NPS 2 and Smaller: Type…