A6-1b SPEC2026-0520_Specifications_IHS-Whiteriver-Hospital_BID-ADD-D.pdf

SMITHGROUP 14904.000 INDIAN HEALTH SERVICE

WHITERIVER HOSPITAL

FINAL CONSTRUCTION DOCUMENTS

BID ADDENDUM-D

20 MAY 2026

FACILITY LIQUEFIED-PETROLEUM GAS PIPING 231126 - 1

SECTION 231126 - FACILITY LIQUEFIED-PETROLEUM GAS PIPING

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Steel pipe and fittings.

2. Mechanical couplings.

3. Piping specialties.

4. Manual gas shutoff valves.

5. Motorized gas valves.

6. Earthquake valves.

7. Pressure regulators.

8. Service meters.

9. Storage containers.

10. Vaporizers.

11. Detectable warning tape.

B. Related Requirements:

1. Section 013573 "Delegated Design Requirements and Procedures" for definitions, submittal procedures, responsibilities, and scheduling requirements associated with delegated design assignment indicated in this Section.

1.2 DEFINITIONS

A. CSST: Corrugated stainless-steel tubing.

B. CWP: Cold working pressure.

C. Exposed, Exterior Installations: Exposed to view outdoors or subject to outdoor ambient temperatures and weather conditions. Examples include rooftop locations.

D. Exposed, Interior Installations: Exposed to view indoors. Examples include finished occupied spaces and mechanical equipment rooms.

E. Finished Spaces: Spaces other than mechanical and electrical equipment rooms, furred spaces, pipe and duct shafts, unheated spaces immediately below roof, spaces above ceilings, unexcavated spaces, crawlspaces, and tunnels.

F. LPG: Liquefied-petroleum gas.

G. PE: Polyethylene.

1.3 ACTION SUBMITTALS

A. Product Data: For each type of the following:

1. Piping specialties.

2. Valves: Include pressure rating, capacity, settings, and electrical connection data of selected models.

3. Pressure Regulators: Indicate pressure ratings and capacities.

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4. Service Meters: Indicate pressure ratings and capacities. Include bypass fittings, meter bars, and supports.

5. Storage containers.

6. Vaporizers.

B. Delegated Design Submittals: Comply with performance requirements and design criteria, including analysis data signed and sealed by the qualified professional engineer responsible for their preparation.

1. Detail fabrication and assembly of seismic restraints.

2. Design Calculations: Calculate requirements for selecting seismic restraints.

1.4 DELIVERY, STORAGE, AND HANDLING

A. Handling Flammable Liquids: Remove and dispose of liquids from existing LPG piping according to requirements of authorities having jurisdiction.

B. Deliver pipes and tubes with factory-applied end caps. Maintain end caps through shipping, storage, and handling to prevent pipe end damage and to prevent entrance of dirt, debris, and moisture.

C. Store pipes and tubes with protective PE coating to avoid damaging coating and protect from direct sunlight.

D. Protect stored PE pipes, tubing, and valves from direct sunlight.

1.5 PROJECT CONDITIONS

A. Perform site survey, research public utility records, and verify existing utility locations.

Contact utility-locating service for area where Project is located.

1.6 COORDINATION

A. Coordinate sizes and locations of concrete bases with actual equipment provided.

B. Coordinate requirements for access panels and doors for valves installed concealed behind finished surfaces. Comply with requirements in Section 083113 "Access Doors and Frames."

PART 2 - PRODUCTS

2.1 SOURCE LIMITATIONS

A. Obtain each product type from single source from single manufacturer.

2.2 PERFORMANCE REQUIREMENTS

A. Comply with requirements of NFPA 58, NFPA 54, and the International Fuel Gas Code for LPG distribution system, including materials, installation, and testing.

B. Comply with requirements of authorities having jurisdiction.

C. Comply with requirements of utility company supplying LPG.

D. Minimum Operating-Pressure Ratings:

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1. Minimum Operating Pressure for Piping and Valves: 125 psig unless otherwise indicated.

2. Minimum Operating Pressure of Service Meter: 5 psig.

E. LPG System Pressure within Buildings:

1. System Pressure within Buildings, Two Pressure Ranges, Not More Than 2 psig:

Primary pressure is more than 0.5 psig but not more than 2 psig and is reduced to secondary pressure of 0.5 psig or less.

F. Delegated Design: Design restraints and anchors for LPG piping and equipment, including comprehensive engineering analysis by a qualified professional engineer, using performance requirements and design criteria indicated.

G. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70, Article 100, by a testing agency acceptable to authorities having jurisdiction, and marked for intended use.

H. Seismic Performance: Vaporizers and storage container supports are to withstand the effects of earthquake motions determined in accordance with ASCE/SEI 7. See Section 230548 "Vibration and Seismic Controls for HVAC Piping and Equipment."

1. The term "withstand" means "the piping/unit will remain in place without separation of any parts from the device when subjected to the seismic forces specified and the piping system will be fully operational after the seismic event."

2. Component Importance Factor: 1.5.

2.3 PIPE, TUBING, AND FITTINGS

A. Steel Pipe and Fittings:

1. Steel Pipe: ASTM A53/A53M black steel, Schedules 40 and 80, Type E or S, Grade B.

2. Malleable-Iron Threaded Fittings: ASME B16.3, Class 150, standard pattern.

3. Wrought-Steel Welding Fittings: ASTM A234/A234M for butt welding and socket welding.

4. Unions: ASME B16.39, Class 150, malleable iron with brass-to-iron seat, ground joint, and threaded ends.

5. Forged-Steel Flanges and Flanged Fittings: ASME B16.5, minimum Class 150, including bolts, nuts, and gaskets of the following material group, end connections, and facings:

a. Material Group: 1.1.

b. End Connections: Threaded or butt welding to match pipe.

c. Lapped Face: Not permitted underground.

d. Gasket Materials: ASME B16.20, metallic, flat, asbestos free, aluminum o-rings, and spiral-wound metal gaskets.

e. Bolts and Nuts: ASME B18.2.1, carbon steel aboveground, and stainless-steel underground.

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6. Protective Coating for Underground Piping: Factory-applied, three-layer coating of epoxy, adhesive, and PE.

a. Joint Cover Kits: Epoxy paint, adhesive, and heat-shrink PE sleeves.

2.4 MECHANICAL COUPLINGS

A. Mechanical Couplings - Steel:

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

a. Smith-Blair, a Xylem brand.

2. Stainless steel flanges and tube with epoxy finish.

3. Buna-nitrile seals.

4. Stainless steel bolts, washers, and nuts.

5. Factory-installed anode for steel-body couplings installed underground.

6. Couplings are to be suitable for joining plain-end PE pipe to PE pipe, steel pipe to PE pipe, or steel pipe to steel pipe.

2.5 PIPING SPECIALTIES

A. Flexible Piping Joints:

1. Approved for LPG service.

2. Stainless steel bellows with woven, flexible, bronze, wire-reinforcing protective jacket.

3. Minimum working pressure of 250 psig and 250 deg F operating temperature.

4. Flanged- or threaded-end connections to match equipment connected and to be capable of minimum 3/4-inch misalignment.

5. Maximum 36-inch length for liquid LPG lines.

B. Appliance Flexible Connectors:

1. Indoor, Fixed-Appliance Flexible Connectors: ANSI Z21.24.

2. Indoor, Movable-Appliance Flexible Connectors: ANSI Z21.69.

3. Outdoor, Appliance Flexible Connectors: ANSI Z21.75.

4. CSST with polymer coating.

5. Operating-Pressure Rating: 0.5 psig.

6. End Fittings: Zinc-coated steel.

7. Threaded Ends: ASME B1.20.1.

8. Maximum Length: 72 inches.

C. Quick-Disconnect Devices:

1. Standard: ANSI Z21.41/CSA 6.9.

2. Copper-alloy convenience outlet and matching plug connector.

3. Nitrile seals.

4. Hand operated with automatic shutoff when disconnected.

5. For indoor or outdoor applications.

6. Adjustable, retractable restraining cable.

D. Y-Pattern Strainers:

1. Body: ASTM A126, Class B, cast iron with bolted cover and bottom drain connection.

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2. End Connections: Threaded ends for NPS 2 and smaller; flanged ends for NPS 2-1/2 and larger.

3. Strainer Screen: 40 -mesh startup strainer and perforated stainless-steel basket with 50 percent free area.

4. CWP Rating: 125 psig.

E. Weatherproof Vent Cap: Cast- or malleable-iron increaser fitting with corrosion-resistant wire screen, with free area at least equal to cross-sectional area of connecting pipe and threaded-end connection.

2.6 JOINING MATERIALS

A. Joint Compound and Tape: Suitable for LPG.

B. Welding Filler Metals: AWS D10.12/D10.12M.

2.7 MANUAL GAS SHUTOFF VALVES

A. Manual Gas Shutoff Valves - Metallic:

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

a. A.Y. McDonald Mfg. Co.

b. Apollo Valves; a part of Aalberts Integrated Piping Systems.

c. BrassCraft Manufacturing Co.; a Masco company.

d. Jomar Valve.

e. Mueller Co.; Gas Products Division; a subsidiary of Mueller Gas Products

Inc.

f. NIBCO INC.

g. Stockham; a Crane Co. brand.

2. Description: Metallic ball valve or metallic plug valve of type indicated in schedules under Part 3.

3. Standards:

a. ASME B16.33.

4. System Pressure Rating: 0.5 psig or less More than 0.5 psig but not more than 2 psig More than 2 psig but not more than 5 psig More than 5 psig but not more than 125 psig Insert pressure.

5. End Connections:

a. Threaded Ends: ASME B1.20.1.

b. Dryseal Threads on Flare Ends: ASME B1.20.3.

c. Flanged Ends: ASME B16.5 for steel flanges.

6. Tamperproof locking feature.

2.8 EARTHQUAKE VALVES

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

1. Firefighter Gas Safety Products.

2. Pacific Seismic Products, Inc.

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B. Description: Seismically activated automatic gas shutoff valve.

C. Standard: ASCE/SEI 25.

D. Maximum Operating Pressure: 10 psig 60 psig Insert pressure.

E. Sight windows for visual indication of valve position.

F. Threaded complying with ASME B1.20.1.

G. Threaded for valves NPS 4 and smaller; or flanged for valves NPS 2 and larger.

2.9 STORAGE CONTAINERS

A. Description: Factory-designed, -fabricated, and -tested containers.

B. Standards:

1. NFPA 58.

2. ASME BPVC-VIII-1.

3. UL 125.

4. UL 842.

5. Department of Transportation (DOT) Regulations.

C. Provide all appurtenances as required by NFPA 58, qualified to UL 125:

1. Vapor-shutoff valve.

2. Liquid-shutoff valve.

3. Pressure-relief valve.

4. Fixed maximum liquid level gauge.

5. Filler valve.

6. Overfilling protection device.

7. Actuated liquid withdrawal excess-flow valve.

8. Provide container appurtenances with a minimum service pressure rating of 250 psig.

D. Provide exposed metal surfaces mechanically cleaned, primed, and painted for resistance to corrosion for outdoor installation.

E. Provide ladders for access to valves more than 72 inches aboveground.

F. Stainless Steel Nameplate: Attach to aboveground storage container or to adjacent structure for underground storage container.

1. Name and address of supplier or trade name of container.

2. Water capacity in gallons and liters.

3. Design pressure in psig and kPa.

a. Statement: "This container does not contain a product having a vapor pressure in excess of I250 psig at 100 deg F."

b. Outside surface area in square feet and square meters.

c. Year of manufacture.

d. Shell thickness in inches and millimeters.

e. Overall length in feet and meters.

f. OD in feet and meters.

g. Manufacturer's serial number.

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h. ASME code label.

4. Felt support pads and two concrete or painted-steel saddles per storage container. Corrosion protection required at container-to-felt contact.

5. Tie straps for each saddle.

6. Straps and anchors for tie-down slab.

7. Asphalt-based coating for corrosion protection.

8. Container connections and valves protected in manway at top of storage container.

9. Manway equipped with ventilation louvers.

2.10 VAPORIZERS

A. Description: Factory-fabricated, -assembled, -calibrated, and -tested vaporizers.

B. Standards:

1. NFPA 58.

2. ASME BPVC-VIII-1.

3. NFPA 70.

4. FM Global labeled.

C. Building Management System Interface: Factory-installed hardware and software to enable building management system to monitor and control set points and display vaporizer status and alarms.

D. Capacities and Characteristics:

1. Heating Fuel: Propane.

2. Vaporization Heat Exchanger:

a. Minimum Working-Pressure Rating: 250 psig.

b. Test Pressure: 375 psig.

2.11 DETECTABLE WARNING TAPE

A. Acid- and alkali-resistant PE film warning tape manufactured for marking and identifying underground utilities, a minimum of 6 inches wide and 4 mils thick, continuously inscribed with a description of utility, with metallic core encased in a protective jacket for corrosion protection, detectable by metal detector when tape is buried up to 30 inches deep; colored yellow.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Examine roughing-in for LPG piping system to verify actual locations of piping connections before equipment installation.

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

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3.2 EARTHWORK

A. Comply with requirements in Section 312000 "Earth Moving" for excavating, trenching, and backfilling.

3.3 PREPARATION

A. Close equipment-shutoff valves before turning off LPG to premises or piping section.

B. Inspect LPG piping in accordance with code(s) and authority having jurisdiction to determine that LPG utilization devices are turned off in piping section affected.

C. Comply with requirements of code(s) and authority having jurisdiction for prevention of accidental ignition.

3.4 INSTALLATION OF OUTDOOR PIPING

A. Comply with code and authority having jurisdiction requirements for installation and purging of LPG piping.

B. Install underground, LPG piping buried a minimum of 36 inches below finished grade.

Comply with requirements in Section 312000 "Earth Moving" for excavating, trenching, and backfilling.

C. Copper Tubing with Protective Coating:

1. Apply joint cover kits over tubing to cover, seal, and protect joints.

2. Repair damage to PE coating on pipe as recommended in writing by protective coating manufacturer.

D. Install fittings for changes in direction and branch connections.

E. Joints for connection to inlets and outlets on vaporizers, regulators, and valves may be flanged or threaded to match the equipment.

F. Install pressure gauge upstream and downstream from each service regulator.

Pressure gauges are specified in Section 230500 "Common Work Results for HVAC."

3.5 INSTALLATION OF INDOOR PIPING

A. Comply with requirements of the code(s) and authority having jurisdiction for installation and purging of LPG piping.

B. Drawing plans, schematics, and diagrams indicate general location and arrangement of piping systems. Indicated locations and arrangements were used to size pipe and calculate friction loss, expansion, and other design considerations. Install piping as indicated unless deviations to layout are approved on coordination drawings.

C. Arrange for pipe spaces, chases, slots, sleeves, and openings in building structure during progress of construction.

D. Install piping in concealed locations unless otherwise indicated. Piping in equipment rooms and service areas may be installed exposed. Piping is not to be installed in inaccessible locations.

1. Conceal piping in walls, pipe spaces, utility spaces, above ceilings, below grade or floors, and in floor channels unless indicated to be exposed to view.

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2. Except as specified below, install concealed piping and piping installed under the building in containment conduit constructed of steel pipe with welded joints, as described in Part 2. Install a vent pipe from containment conduit to outdoors and terminate with weatherproof vent cap.

a. Above Accessible Ceilings: Piping, fittings, valves, and regulators may be installed in accessible spaces without containment conduit.

1) Install piping above accessible ceilings to allow sufficient space for ceiling panel removal.

b. In Floors: Install piping with welded or brazed joints and protective coating in cast-in-place concrete floors. Cover piping to be cast in concrete slabs with minimum of 1-1/2 inches of concrete. Piping may not be in physical contact with other metallic structures, such as reinforcing rods or electrically neutral conductors. Do not embed piping in concrete slabs containing quick-set additives or cinder aggregate.

c. In Floor Channels: Channels must have cover and be open to space above cover for ventilation.

d. In Walls or Partitions: Protect piping installed inside partitions or hollow walls from physical damage using steel striker barriers at rigid supports.

1) Exception: Piping passing through partitions or walls does not require striker barriers.

e. Prohibited Locations:

1) Do not install piping in or through circulating air ducts, clothes or trash chutes, chimneys or gas vents (flues), ventilating ducts, or dumbwaiter or elevator shafts.

2) Do not install piping in return-air plenums.

3) Do not install piping in solid walls or partitions.

f. Under the Building: Install in vented containment conduit or CSST with integral vented sleeve and associated fittings.

E. Install piping indicated to be exposed and piping in equipment rooms and service areas at right angles or parallel to building walls. Diagonal runs are prohibited unless specifically indicated otherwise.

F. Locate valves for easy access from a standing position.

G. Install LPG piping at uniform grade of 2 percent down toward drip and sediment traps.

H. Install piping free of sags and bends.

I. Install fittings for changes in direction and branch connections.

J. Comply with requirements in Sections specifying gas-fired appliances and equipment, and verify final appliance and equipment locations for roughing-in.

K. Drips and Sediment Traps: Install drips at points where condensate may collect, including service-meter outlets. Locate where readily accessible to permit cleaning and emptying. Do not install where condensate is subject to freezing.

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1. Construct drips and sediment traps using tee fitting with bottom outlet plugged or capped. Use nipple a minimum length of three pipe diameters, but not less than 3 inches long and same size as connected pipe. Install with space below bottom of drip to remove plug or cap.

L. Extend relief vent connections for service regulators, line regulators, and overpressure protection devices to outdoors, and terminate with weatherproof vent cap.

M. Use eccentric reducer fittings to make reductions in pipe sizes. Install fittings with level side down.

N. Connect branch piping from top or side of horizontal piping.

O. Install unions in pipes NPS 2 and smaller, adjacent to each valve, at final connection to each piece of equipment. Unions are not required at flanged connections.

P. Do not use LPG piping as grounding electrode.

Q. Install strainer on inlet of each line-pressure regulator and automatic or electrically operated valve.

R. Install pressure gauge upstream and downstream from each line regulator. Pressure gauges are specified in Section 230500 "Common Work Results for HVAC."

S. Install sleeves for piping penetrations of walls, ceilings, and floors. Comply with requirements for sleeves specified in Section 230500 "Common Work Results for

HVAC."

T. Install sleeve seals for piping penetrations of concrete walls and slabs. Comply with requirements for sleeve seals specified in Section 230500 "Common Work Results for

HVAC."

U. Install escutcheons for piping penetrations of walls, ceilings, and floors. Comply with requirements for escutcheons specified in Section 230500 "Common Work Results for

HVAC."

3.6 INSTALLATION OF SERVICE-METER ASSEMBLY

A. Install service-meter assemblies aboveground, on concrete bases.

B. Install metal shutoff valves upstream from service regulators. Shutoff valves are not required at second regulators if two regulators are installed in series.

C. Install strainer on inlet of service-pressure regulator and meter set.

D. Install service regulators mounted outside with vent outlet horizontal or facing down.

Install screen in vent outlet if not integral with service regulator.

E. Install metal shut off valves upstream from service meters. Install dielectric fittings downstream from service meters.

F. Install service meters downstream from pressure regulators.

G. Install metal bollards to protect meter assemblies. Comply with requirements in Section 055000 "Metal Fabrications" for pipe bollards.

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3.7 INSTALLATION OF VALVES

A. Install manual gas shutoff valve for each gas appliance ahead of CSST, aluminum, or copper connector.

B. Install underground valves with valve boxes.

C. Install regulators and overpressure protection devices with maintenance access space adequate for servicing and testing.

D. Install earthquake valves aboveground outside buildings according to listing.

E. Install anode for metallic valves in underground PE piping.

F. Do not install valves in return-air plenums.

3.8 PIPING JOINT CONSTRUCTION

A. Ream ends of pipes and tubes and remove burrs.

B. Remove scale, slag, dirt, and debris from inside and outside of pipe and fittings before assembly.

C. Threaded Joints:

1. Thread pipe with tapered pipe threads complying with ASME B1.20.1.

2. Cut threads full and clean using sharp dies.

3. Ream threaded pipe ends to remove burrs and restore full ID of pipe.

4. Apply appropriate tape or thread compound to external pipe threads unless dryseal threading is specified.

5. Damaged Threads: Do not use pipe or pipe fittings with threads that are corroded or damaged. Do not use pipe sections that have cracked or open welds.

D. Welded Joints:

1. Construct joints in accordance with AWS D10.12/D10.12M, using qualified processes and welding operators.

2. Bevel plain ends of steel pipe.

3. Patch factory-applied protective coating as recommended by manufacturer at field welds and where damage to coating occurs during construction.

E. Brazed Joints: Construct joints in accordance with AWS's "Brazing Handbook," Ch. 22, "Pipe and Tube."

F. Flanged Joints: Install gasket material, size, type, and thickness appropriate for LPG service. Install gasket concentrically positioned.

G. Flared Joints: Cut tubing with roll cutting tool. Flare tube end with tool to result in flare dimensions complying with SAE J513. Tighten finger tight, then use wrench. Do not overtighten.

H. PE Piping Heat-Fusion Joints: Clean and dry joining surfaces by wiping with clean cloth or paper towels. Join in accordance with ASTM D2657.

1. Plain-End Pipe and Fittings: Use butt fusion.

2. Plain-End Pipe and Socket Fittings: Use socket fusion.

3.9 PIPING CONNECTIONS

A. Connect to utility's gas main according to utility's procedures and requirements.

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B. Install LPG piping electrically continuous and bonded to gas appliance equipment grounding conductor of the circuit powering the appliance in accordance with NFPA 70.

C. Install piping adjacent to appliances to allow service and maintenance of appliances.

D. Connect piping to appliances using manual gas-shutoff valves and unions. Install valve within 72 inches of each gas-fired appliances and equipment. Install union between valve and appliances or equipment.

3.10 INSTALLATION OF STORAGE CONTAINER

A. Do not install storage containers in a pit.

B. Fill storage container to at least 80 percent capacity with propane.

C. Install piping connections with swing joints or flexible connectors to allow for storage container settlement and for thermal expansion and contraction.

D. Ground containers in accordance with NFPA 780. Grounding is specified in Section 264113 "Lightning Protection for Structures."

E. Set storage containers in felt pads on concrete or steel saddles. Install corrosion protection at container-to-felt contact.

F. Install tie-downs over storage containers on saddles with proper tension.

G. Set concrete saddles on dowels set in concrete base. Anchor steel saddles to concrete base.

H. Set storage container on concrete ballast base large enough to offset buoyancy of empty storage container immersed in water.

I. Install tie-down straps over container anchored in ballast base, and repair damaged coating.

J. Backfill with a minimum coverage for underground or mounded storage containers in accordance with NFPA 58.

K. Backfill with pea gravel as required in Section 312000 "Earth Moving."

L. Install cathodic protection for storage container. Cathodic protection is specified in Section 134713 "Cathodic Protection." (ADD. D)

3.11 INSTALLATION OF VAPORIZER

A. Install vaporizer with access space for periodic maintenance.

B. Set vaporizers on and anchor to concrete base.

C. Connect liquid line from pump set and connect vapor supply to distribution piping.

D. Install backup connection from vapor space of container to inlet of pressure-regulating valve at vaporizer discharge to bypass the vaporizer during maintenance. Install shutoff valves to change source from vaporizer to storage container.

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3.12 INSTALLATION OF LABELING AND IDENTIFICATION

A. Comply with requirements in Section 230553 "Identification for HVAC Piping and Equipment" for piping and valve identification.

B. Install detectable warning tape directly above gas piping, 12 inches below finished grade, except 6 inches below subgrade under pavements and slabs.

C. Label and identify gas piping and pressure outside a multitenant building by tenant.

3.13 CONCRETE BASES

A. Anchor equipment to concrete base in accordance with Project codes.

1. Construct concrete bases of dimensions indicated, but not less than 4 inches larger in both directions than supported unit.

2. Install dowel rods to connect concrete base to concrete floor. Unless otherwise indicated, install dowel rods on 18-inch centers around the full perimeter of the base.

3. Install epoxy-coated anchor bolts for supported equipment that extend through concrete base, and anchor into structural concrete floor.

4. Place and secure anchorage devices. Use supported equipment manufacturer's setting drawings, templates, diagrams, instructions, and directions furnished with items to be embedded.

5. Install anchor bolts to elevations required for proper attachment to supported equipment.

6. Use 3000 psig, 28-day, compressive-strength concrete and reinforcement, as specified in Section 033000 "Cast-in-Place Concrete."

3.14 DEMONSTRATION

A. Train Owner's maintenance personnel to adjust, operate, and maintain LPG equipment.

3.15 OUTDOOR PIPING SCHEDULE

A. Underground piping is to be the following:

1. Schedule 40, steel pipe with wrought-steel fittings and welded joints, or mechanical couplings. Coat pipe and fittings with protective coating for steel piping.

2. Containment Conduit: Schedule 40, steel pipe with wrought-steel fittings and welded joints. Coat pipe and fittings with protective coating for steel piping.

B. Aboveground piping is to be the following:

1. Schedule 40, steel pipe with malleable-iron fittings and threaded joints.

2. Schedule 40, steel pipe with wrought-steel fittings and welded joints, or mechanical couplings.

3. -temper copper tube, with wrought-copper fittings and brazed joints. Coat pipe and fittings with protective coating for copper tubing.

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C. Branch Piping in Cast-in-Place Concrete to Single Appliance: Annealed-temper copper, with wrought-copper fittings and brazed joints. Install piping embedded in concrete with no pipe joints in concrete.

3.16 INDOOR PIPING SCHEDULE FOR SYSTEM PRESSURES LESS THAN 0.5 PSIG

(3.45 kPa)

A. Aboveground piping is to be one of the following:

1. Schedule 40, steel pipe with malleable-iron fittings and threaded joints.

2. Schedule 40, steel pipe with wrought-steel fittings and welded joints.

B. Underground, below building, piping is to be one of the following:

1. Schedule 40, steel pipe with malleable-iron fittings and threaded joints.

2. Schedule 40, steel pipe with wrought-steel fittings and welded joints.

3. Containment Conduit: Schedule 40, steel pipe with wrought-steel fittings and welded joints. Coat pipe and fittings with protective coating for steel piping.

4. Containment Conduit Vent Piping: Schedule 40, steel pipe with malleable-iron fittings and threaded or wrought-steel fittings with welded joints. Coat underground pipe and fittings with protective coating for steel piping.

3.17 INDOOR PIPING SCHEDULE FOR SYSTEM PRESSURES MORE THAN 0.5 PSIG

(3.45 kPa) AND LESS THAN 5 PSIG (34.5 kPa)

A. Aboveground piping is to be one of the following:

1. Schedule 40, steel pipe with malleable-iron fittings and threaded joints.

2. Schedule 40, steel pipe with steel welding fittings and welded joints.

B. Underground, below building, piping is to be one of the following:

1. Schedule 40, steel pipe with malleable-iron fittings and threaded joints.

2. Schedule 40, steel pipe with wrought-steel fittings and welded joints.

3. Containment Conduit: Schedule 40, steel pipe with wrought-steel fittings and welded joints. Coat underground pipe and fittings with protective coating for steel piping.

4. Containment Conduit Vent Piping: Schedule 40, steel pipe with malleable-iron fittings and threaded or wrought-steel fittings with welded joints. Coat underground pipe and fittings with protective coating for steel piping.

3.18 INDOOR PIPING SCHEDULE FOR SYSTEM PRESSURES MORE THAN 5 PSIG

(34.5 kPa)

A. Aboveground piping is to be the following:

1. Schedule 40, steel pipe with steel welding fittings and welded joints.

B. Underground, below building, piping is to be the following:

1. Schedule 40, steel pipe with wrought-steel fittings and welded joints.

FINAL CONSTRUCTION DOCUMENTS

BID ADDENDUM-D

20 MAY 2026

FACILITY LIQUEFIED-PETROLEUM GAS PIPING 231126 - 15

3.19 UNDERGROUND MANUAL GAS SHUTOFF VALVE SCHEDULE

A. Connections to Existing Gas Piping: Use valve and fitting assemblies made for tapping utility's gas mains and listed by an NRTL.

B. Underground Vapor Piping:

1. PE valves.

2. NPS 2 and Smaller: Bronze, lubricated plug valves.

3. NPS 2-1/2 and Larger: Cast-iron, lubricated plug valves.

3.20 ABOVEGROUND MANUAL GAS SHUTOFF VALVE SCHEDULE

A. Valves for pipe NPS 2 and smaller is to be the following:

1. One-piece, bronze ball valve with bronze trim.

2. Two-piece, full -port, bronze ball valves with bronze trim.

3. Bronze plug valve.

B. Valves for pipe NPS 2-1/2 and larger are to be the following:

1. Two-piece, full -port, bronze ball valves with bronze trim.

2. Bronze plug valve.

3. Cast-iron, lubricated plug valve.

END OF SECTION