231123_fuel_gas_piping.pdf

CHICOPEE ARMORY REHABILITATION MMD PROJECT NO. 985101

CHICOPEE, MASSACHUSETTS ISSUED FOR BID - 05/20/11

10090 FUEL GAS PIPING 231123-1

SECTION 231123

FUEL GAS PIPING

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.

B. The requirements of Section 230100, “Basic Mechanical Requirements” apply to work defined by this Section.

C. The requirements of Section 230500, “Basic Mechanical Materials and Methods” apply to work defined by the Section.

1.2 SUMMARY

A. This Section includes fuel gas piping, specialties, and accessories within the building.

B. Related Sections include the following:

1. Division 23 Section "Meters and Gages" for pressure gages.

1.3 PROJECT CONDITIONS

A. Gas System Pressure: One pressure range. 0.5 psig or less .

B. Design values of fuel gas supplied for these systems are as follows:

1. Nominal Heating Value: 1000 Btu/cu. ft..

2. Nominal Specific Gravity: 0.6.

1.4 SUBMITTALS

A. Product Data: For the following:

1. Corrugated, stainless-steel tubing systems. Include associated components.

2. Specialty valves. Include pressure rating, capacity, settings, and electrical connection data of selected models.

3. Pressure regulators. Include pressure rating, capacity, and settings of selected models.

B. Shop Drawings: For fuel gas piping. Include plans and attachments to other Work.

1. Wiring Diagrams: Power, signal, and control wiring. Differentiate between manufacturer-installed and field-installed wiring.

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C. Field Test Reports: Indicate and interpret test results for compliance with performance requirements.

D. Maintenance Data: For natural gas specialties and accessories to include in maintenance manuals specified in Division 1.

1.5 QUALITY ASSURANCE

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

B. ANSI Standard: Comply with ANSI Z223.1, "National Fuel Gas Code."

C. IAS Standard: Provide components listed in IAS's "Directory of A. G. A. and C. G. A Certified

Appliances and Accessories" if specified to be IAS listed.

D. UL Standard: Provide components listed in UL's "Gas and Oil Equipment Directory" if specified to be UL listed.

E. Steel Support Welding Qualifications: Qualify procedures and personnel according to

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

F. Pipe Welding Qualifications: Qualify procedures and operators according to ASME Boiler and

Pressure Vessel Code.

1.6 DELIVERY, STORAGE, AND HANDLING

A. Handling Flammable Liquids: Remove and legally dispose of liquids from drips in existing gas piping. Handle cautiously to avoid spillage and ignition. Notify fuel gas supplier. Handle flammable liquids used by Installer with proper precautions and do not leave on premises from end of one day to beginning of next day.

1.7 COORDINATION

A. Existing Utilities: Do not interrupt utilities serving facilities occupied by Owner or others unless permitted under the following conditions and then only after arranging to provide temporary utility services according to requirements indicated:

1. Notify Architect not less than two days in advance of proposed utility interruptions.

2. Do not proceed with utility interruptions without Architect's written permission.

PART 2 - PRODUCTS

2.1 MANUFACTURERS

A. Available Manufacturers: Subject to compliance with requirements, manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following:

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

1. Corrugated, Stainless-Steel Tubing Systems:

a. OmegaFlex, Inc.

b. Titeflex.

c. Tru-Flex Metal Hose Corp.

d. Ward Manufacturing, Inc.

2. Appliance Connector Valves:

a. American Valve.

b. B&K Industries, Inc.

c. BrassCraft Manufacturing Company; a Masco company.

d. Cimberio Valves, S. p. A.

e. Conbraco Industries, Inc.; Apollo Div.

f. E. M. Plastic and Electric Products, Ltd.; Neo Valve Div.

g. Frey: John M. Frey Co.

h. Jomar International, Ltd.

i. Key Gas Components, Inc.

j. Legend Valve and Fitting, Inc.

k. McDonald, A. Y. Mfg. Co.

l. Mueller Co.; Mueller Gas Products Div.

m. Newman Hattersley, Ltd.; Specialty Valve Div.

n. Robert Manufacturing Co.

o. State Metals, Inc.

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

3. Gas Valves, NPS 2 and Smaller:

a. BMI Canada, Inc.

b. Crane Valves.

c. Dungs: Karl Dungs, Inc.

d. Flow Control Equipment, Inc.

e. Grinnell Corp.

f. Honeywell, Inc.

g. Jomar International, Ltd.

h. Kitz Corp. of America.

i. Legend Valve and Fitting, Inc.

j. Lyall, R. W. & Company, Inc.

k. McDonald, A. Y. Mfg. Co.

l. Milwaukee Valve Co., Inc.

m. Mueller Co.; Mueller Gas Products Div.

n. Nibco, Inc.

o. Red-White Valve Corp.

p. Velan Valve Corp.

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

4. Plug Valves, NPS 2-1/2 and Larger:

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a. Flow Control Equipment, Inc.

b. Milliken Valve Co., Inc.

c. Nordstrom Valves, Inc.

d. Olson Technologies, Inc.; Homestead Valve Div.

e. Walworth Co.

5. Line Pressure Regulators:

a. American Meter Company.

b. Donkin: Bryan Donkin RMG Canada, Ltd.

c. Eclipse Combustion, Inc.

d. Equimeter, Inc.

e. Fisher Control Valves and Regulators; Division of Emerson Process Management.

f. Invensys.

g. Maxitrol Company.

h. National Meter.

i. Richards Industries; Jordan Valve Div.

j. Schlumberger Industries; Gas Div.

6. Appliance Pressure Regulators:

a. Canadian Meter Company Inc.

b. Eaton Corporation; Controls Div.

c. Harper Wyman Co.

d. Maxitrol Company.

e. SCP, Inc.

2.2 PIPING MATERIALS

A. Refer to Part 3 "Piping Applications" Article for applications of pipe, tube, fitting, and joining materials.

2.3 CORRUGATED, STAINLESS-STEEL TUBING SYSTEMS

A. Description: Comply with ANSI/IAS LC 1 and include the following:

1. Tubing: ASTM A 240/A 240M, Corrugated stainless steel with plastic jacket or coating.

2. Fittings: Copper alloy with ends made to fit corrugated tubing. Include ends with threads according to ASME B1.20.1 if connection to threaded pipe or fittings is required.

3. Striker Plates: Steel, designed to protect tubing from penetrations.

4. Manifolds: Malleable iron or steel with protective coating. Include threaded connections according to ASME B1.20.1 for pipe inlet and corrugated tubing outlets.

2.4 PIPES, TUBES, FITTINGS, AND JOINING MATERIALS

A. Steel Pipe: ASTM A 53/A 53M, Type E or S; Grade B; Schedule 40; black.

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1. Malleable-Iron Threaded Fittings: ASME B16.3, Class 150, standard pattern, with threaded ends according to ASME B1.20.1.

2. Unions: ASME B16.39, Class 150, malleable iron with brass-to-iron seat, ground joint, and threaded ends according to ASME B1.20.1.

3. Cast-Iron Flanges and Flanged Fittings: ASME B16.1, Class 125.

4. Steel Welding Fittings: ASME B16.9, wrought steel or ASME B16.11, forged steel.

5. Steel Threaded Fittings: ASME B16.11, forged steel with threaded ends according to

ASME B1.20.1.

6. Joint Compound and Tape: Suitable for natural gas.

7. Steel Flanges and Flanged Fittings: ASME B16.5.

8. Gasket Material: Thickness, material, and type suitable for natural gas.

B. Steel Pipe: ASTM A 53/A 53M, Type E or S, Grade A or B, Schedule 40, galvanized. Include ends matching joining method.

1. Steel Pipe Nipples: ASTM A 733, made of ASTM A 53/A 53M or

ASTM A 106/A 106M, Schedule 40, galvanized, seamless steel pipe. Include ends matching joining method.

2. Malleable-Iron Unions: ASME B16.39; Class 150; hexagonal-stock body with ball-and-socket, metal-to-metal, bronze seating surface; and female threaded ends.

3. Cast-Iron, Threaded, Drainage Fittings: ASME B16.12, galvanized.

4. Cast-Iron Flanges: ASME B16.1, Class 125.

5. Cast-Iron, Flanged Fittings: ASME B16.1, Class 125, galvanized.

6. Steel-Piping, Grooved-End Fittings: ASTM A 47/A 47Mgalvanized, malleable-iron casting; ASTM A 106/A 106M, galvanized steel pipe; or ASTM A 536, galvanized, ductile-iron casting; with dimensions matching steel pipe.

a. Steel-Piping, Keyed Couplings: AWWA C606, for steel-pipe dimensions. Include ferrous housing sections, gasket suitable for water, and bolts and nuts.

C. Hard Copper Tube: ASTM B 88, Type L, water tube, drawn temper.

1. Copper Fittings: ASME B16.22, wrought copper, streamlined pattern.

2. Brazing Filler Metals: AWS A5.8/A5.8M, Silver Classification BAg-1. Filler metal containing phosphorus is prohibited.

3. Bronze Flanges and Flanged Fittings: ASME B16.24, Class 150.

4. Gasket Material: Thickness, material, and type suitable for natural gas.

D. Soft Copper Tube: ASTM B 88, Type L, water tube, annealed temper.

1. Copper Fittings: ASME B16.22, wrought copper, streamlined pattern.

2. Brazing Filler Metals: AWS A5.8/A5.8M, Silver Classification BAg-1. Filler metal containing phosphorus is prohibited.

E. Tin-Lined Copper Tube: ASTM B 280, seamless, annealed, with interior tin-plated lining.

1. Copper Fittings: ASME B16.22, wrought copper, streamlined pattern.

2. Brazing Filler Metals: AWS A5.8/A5.8M, Silver Classification BAg-1. Filler metal containing phosphorus is prohibited.

F. Transition Fittings: Type, material, and end connections to match piping being joined.

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G. Common Joining Materials: Refer to Division 23 Section "Basic Mechanical Materials and

Methods" for joining materials not in this Section.

2.5 PROTECTIVE COATING

A. Furnish pipe and fittings with factory-applied, corrosion-resistant polyethylene coating for use in corrosive atmosphere.

2.6 PIPING SPECIALTIES

A. Flexible Connectors: ANSI Z21.24, copper alloy.

B. Quick-Disconnect Devices: ANSI Z21.41, convenience outlets and matching plug connector.

2.7 SPECIALTY VALVES

A. Valves, NPS 2 and Smaller: Threaded ends according to ASME B1.20.1 for pipe threads.

B. Valves, NPS 2-1/2 and Larger: Flanged ends according to ASME B16.5 for steel flanges and according to ASME B16.24 for copper and copper-alloy flanges.

C. Appliance Connector Valves: ANSI Z21.15 and IAS listed.

D. Gas Stops: Bronze body with AGA stamp, plug type with bronze plug and flat or square head, ball type with chrome-plated brass ball and lever handle, or butterfly valve with stainless-steel disc and fluorocarbon elastomer seal and lever handle; 2-psig minimum pressure rating.

E. Gas Valves, NPS 2 and Smaller: ASME B16.33 and IAS-listed bronze body and 125-psig pressure rating.

1. Tamperproof Feature: Include design for locking.

F. Plug Valves, NPS 2-1/2 and Larger: ASME B16.38 and MSS SP-78 cast-iron, lubricated plug valves, with 125-psig pressure rating.

1. Tamperproof Feature: Include design for locking.

G. General-Duty Valves, NPS 2-1/2 and Larger: ASME B16.38, cast-iron body, suitable for fuel gas service, with "WOG" indicated on valve body, and 125-psig pressure rating.

1. Gate Valves: MSS SP-70, OS&Y type with solid wedge.

2. Butterfly Valves: MSS SP-67, lug type with lever handle.

H. Automatic Gas Valves: ANSI Z21.21, with electrical operator for actuation by appliance automatic shutoff device.

I. Electrically Operated Gas Valves: UL 429, bronze, aluminum, or cast-iron body solenoid valve; 120-V ac, 60 Hz, Class B, continuous-duty molded coil. Include NEMA ISC 6, Type 4, 10090 FUEL GAS PIPING 231123-7 coil enclosure and electrically opened and closed dual coils. Valve position shall normally be closed.

J. Earthquake Valves: [FM approved or listed in IAS Directory as complying with ANSI Z21.70 and UL listed] [FM approved] [Listed in IAS Directory as complying with ANSI Z21.70 and

UL listed]. Include mechanical operator. Comply with ASCE 25

2.8 PRESSURE REGULATORS

PART 3 - EXECUTION

3.1 PREPARATION

A. Close equipment shutoff valves before turning off fuel gas to premises or section of piping.

Perform leakage test as specified in "Field Quality Control" Article to determine that all equipment is turned off in affected piping section.

B. Comply with ANSI Z223.1, "Prevention of Accidental Ignition" Paragraph.

3.2 PIPING APPLICATIONS

A. Flanges, unions, transition, and special fittings with pressure ratings same as or higher than system pressure rating may be used in applications below, unless otherwise indicated.

B. Fuel Gas Piping, 0.5 psig or Less: Use the following:

1. NPS 1/2 and Smaller: NPS 3/4 steel pipe, malleable-iron threaded fittings, and threaded joints.

2. NPS 1/2 and Smaller: Hard copper tube, copper fittings, and brazed joints.

a. Option: Soft copper tube, copper fittings, and brazed joints may be used for runouts at individual appliances.

3. NPS 1/2 and Smaller: Tin-lined copper tube, copper fittings, and brazed joints.

4. NPS 1/2 and Smaller: Corrugated, stainless-steel tubing system and threaded joints.

5. NPS 3/4 and NPS 1: Steel pipe, malleable-iron threaded fittings, and threaded joints.

6. NPS 3/4 and NPS 1: Hard copper tube, copper fittings, and brazed joints.

a. Option: Soft copper tube, copper fittings, and brazed joints may be used for runouts at individual appliances.

7. NPS 3/4 and NPS 1: Corrugated, stainless-steel tubing system and threaded joints.

8. NPS 1-1/4 to NPS 2: Steel pipe, malleable-iron threaded fittings, and threaded joints.

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9. NPS 2-1/2 to NPS 4: Steel pipe, malleable-iron threaded fittings, and threaded joints.

10. Larger Than NPS 4: Steel pipe, steel welding fittings, and welded joints.

C. Fuel Gas Piping, 0.5 to 2 psig: Use the following:

1. NPS 1/2 and Smaller: NPS 3/4 steel pipe, malleable-iron threaded fittings, and threaded joints.

2. NPS 1/2 and Smaller: Tin-lined copper tube, copper fittings, and brazed joints.

3. NPS 1/2 and Smaller: Corrugated, stainless-steel tubing system and threaded joints.

4. NPS 3/4 and NPS 1: Steel pipe, malleable-iron threaded fittings, and threaded joints.

5. NPS 3/4 and NPS 1: Hard copper tube, copper fittings, and brazed joints.

6. NPS 1-1/4 to NPS 2: Steel pipe, malleable-iron threaded fittings, and threaded joints.

7. NPS 2-1/2 to NPS 4: Steel pipe, malleable-iron threaded fittings, and threaded joints.

8. Larger Than NPS 4: Steel pipe, steel welding fittings, and welded joints.

D. Fuel Gas Piping 2 to 5 psig: Use the following:

1. NPS 2 and Smaller: Steel pipe, malleable-iron threaded fittings, and threaded joints.

2. NPS 2-1/2 to NPS 4: Steel pipe, malleable-iron threaded fittings, and threaded joints.

3. Larger Than NPS 4: Steel pipe, steel welding fittings, and welded joints.

3.3 VALVE APPLICATIONS

A. Appliance Shutoff Valves for Pressure 0.5 psig or Less: Appliance connector valve or gas stop.

B. Appliance Shutoff Valves for Pressure 0.5 to 2 psig: Gas stop or gas valve.

C. Appliance Shutoff Valves for Pressure 2 to 5 psig: Gas valve.

D. Piping Line Valves, NPS 2 and Smaller: Gas valve.

E. Piping Line Valves, NPS 2-1/2 and Larger: Plug valve or general-duty valve.

F. Valves at Service Meter, NPS 2 and Smaller: Gas valve.

G. Valves at Service Meter, NPS 2-1/2 and Larger: Plug valve.

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3.4 PIPING INSTALLATION

A. Refer to Division 22 Section "Basic Mechanical Materials and Methods" for basic piping installation requirements.

B. Concealed Locations: Except as specified below, install concealed gas piping in airtight conduit constructed of Schedule 40, seamless, black steel pipe with welded joints. Vent conduit to outside and terminate with screened vent cap.

1. Above-Ceiling Locations: Gas piping may be installed in accessible spaces, subject to approval of authorities having jurisdiction, whether or not such spaces are used as plenums. Do not locate valves above ceilings.

2. In Floors: Gas piping with welded joints and protective wrapping specified in "Protective

Coating" Article in Part 2 may be installed in floors, subject to approval of authorities having jurisdiction. Surround piping 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.

3. In Floor Channels: Gas piping may be installed in floor channels, subject to approval of authorities having jurisdiction. Channels must have cover and be open to space above cover for ventilation.

4. In Partitions: Do not install concealed piping in solid partitions. Protect tubing from physical damage when installed inside partitions or hollow walls.

a. Exception: Tubing passing through partitions or walls.

5. In Walls: Gas piping with welded joints and protective wrapping specified in "Protective

Coating" Article in Part 2 may be installed in masonry walls, subject to approval of authorities having jurisdiction.

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

a. Exception: Accessible above-ceiling space specified above.

C. Drips and Sediment Traps: Install drips at points where condensate may collect. Include outlets of service meters. Locate where readily accessible for cleaning and emptying. Do not install where condensate would be subject to freezing.

1. Construct drips and sediment traps using tee fitting with bottom outlet plugged or capped.

Use minimum-length nipple of 3 pipe diameters, but not less than 3 inches long, and same size as connected pipe. Install with space between bottom of drip and floor for removal of plug or cap.

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

E. Install fuel gas piping at uniform grade of 0.1 percent slope upward toward risers.

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

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

H. Install unions in pipes NPS 2 and smaller, adjacent to each valve, at final connection to each piece of equipment, and elsewhere as indicated. Unions are not required on flanged devices.

I. Install corrugated, stainless-steel tubing system according to manufacturer's written instructions.

Include striker plates to protect tubing from puncture where tubing is restrained and cannot move.

J. Install strainer on inlet of each line pressure regulator and automatic and electrically operated valve.

K. Install pressure gage [upstream and downstream] from each line pressure regulator.

L. Install flanges on valves, specialties, and equipment having NPS 2-1/2 and larger connections.

M. Install vent piping for gas pressure regulators and gas trains, extend outside building, and vent to atmosphere. Terminate vents with turned-down, reducing-elbow fittings with corrosion-resistant insect screens in large end.

N. Install containment conduits for gas piping below slabs, within building, in gastight conduits extending minimum of 4 inches outside building, and vented to atmosphere. Terminate vents with turned-down, reducing-elbow fittings with corrosion-resistant insect screens in large end.

Prepare and paint outside of conduits with coal-tar, epoxy-polyamide paint according to SSPC-

Paint 16.

3.5 JOINT CONSTRUCTION

A. Refer to Division 22 Section "Basic Mechanical Materials and Methods" for basic piping joint construction.

B. Use materials suitable for fuel gas.

1. Brazed Joints: Make with brazing alloy with melting point greater than 1000 deg F.

Brazing alloys containing phosphorus are prohibited.

3.6 HANGER AND SUPPORT INSTALLATION

A. Refer to Division 22 Section "Hangers and Supports" for pipe hanger and support devices.

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

1. NPS 1 and Smaller: Maximum span, 96 inches; minimum rod size, 3/8 inch.

2. NPS 1-1/4: Maximum span, 108 inches; minimum rod size, 3/8 inch.

3. NPS 1-1/2 and NPS 2: Maximum span, 108 inches; minimum rod size, 3/8 inch.

4. NPS 2-1/2 to NPS 3-1/2: Maximum span, 10 feet; minimum rod size, 1/2 inch.

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5. NPS 4 and Larger: Maximum span, 10 feet; minimum rod size, 5/8 inch.

C. Install hangers for horizontal hard copper tubing with the following maximum spacing and minimum rod sizes:

1. NPS 3/8: Maximum span, 48 inches; minimum rod size, 3/8 inch.

2. NPS 1/2 and NPS 5/8: Maximum span, 72 inches; minimum rod size, 3/8 inch.

3. NPS 3/4 and NPS 7/8: Maximum span, 84 inches; minimum rod size, 3/8 inch.

4. NPS 1: Maximum span, 96 inches; minimum rod size, 3/8 inch.

D. Install hangers for horizontal corrugated, stainless-steel tubing with the following maximum spacing and minimum rod sizes:

1. NPS 3/8 and NPS 1/2: Maximum span, 48 inches; minimum rod size, 3/8 inch.

2. NPS 3/4 and NPS 1: Maximum span, 72 inches; minimum rod size, 3/8 inch.

3. Option: Support tubing from structure according to manufacturer's written instructions.

3.7 CONNECTIONS

A. Drawings indicate general arrangement of fuel gas piping, fittings, and specialties.

B. Install piping adjacent to appliances to allow service and maintenance.

C. Connect piping to appliances using gas with shutoff valves and unions. Install valve upstream from and within 72 inches of each appliance. Install union downstream from valve.

D. Sediment Traps: Install tee fitting with capped nipple in bottom to form drip, as close as practical to inlet of each appliance using gas.

E. Ground equipment.

1. Tighten electrical connectors and terminals according to manufacturer's published torque-tightening values. If manufacturer's torque values are not indicated, use those specified in UL 486A and UL 486B.

2. Do not use gas pipe as grounding electrode.

3.8 LABELING AND IDENTIFYING

A. Equipment Nameplates and Signs: Install engraved plastic-laminate equipment nameplate or sign on or near each service meter, pressure regulator, and specialty valve.

1. Text: In addition to name of identified unit, distinguish between multiple units, inform operator of operational requirements, indicate safety and emergency precautions, and warn of hazards and improper operations.

2. Refer to Division 23 Section "Mechanical Identification" for nameplates and signs.

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3.9 PAINTING

A. Use materials and procedures in Division 9 Section "Painting," "Exterior Paint Schedule"

Article, "Ferrous Metal" Paragraph, "Full-Gloss, Alkyd-Enamel Finish" Subparagraph.

B. Paint exterior service meters, pressure regulators, and specialty valves.

1. Color: Gray .

C. Paint piping installed below ceilings with one coat of suitable primer and two coats of gray enamel topcoat.

3.10 FIELD QUALITY CONTROL

A. Inspect, test, and purge piping according to ANSI Z223.1, Part 4 "Inspection, Testing, and

Purging," and requirements of authorities having jurisdiction.

B. Repair leaks and defects with new materials and retest system until satisfactory results are obtained.

C. Report test results promptly and in writing to Architect and authorities having jurisdiction.

D. Verify capacities and pressure ratings of service meters, pressure regulators, valves, and specialties.

E. Verify correct pressure settings for pressure regulators.

F. Verify that specified piping tests are complete.

3.11 ADJUSTING

A. Adjust controls and safety devices. Replace damaged and malfunctioning controls and safety devices.

END OF SECTION 231123