235100_Breechings_Chimneys_and_Stacks_GS_June_2014.pdf

CONSTRUCTION ISSUE

Architectural & Refrigeration Upgrade

Commissary - Fort Myer, VA 28 Apr 2015

BREECHINGS, CHIMNEYS, AND STACKS

23 51 00 - 1

SECTION 23 51 00

BREECHINGS, CHIMNEYS, AND STACKS

(Edited from DeCA June 2014 Design Criteria)

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Listed double-wall vents.

2. Listed special venting.

3. Listed grease ducts.

B. Related Sections:

1. Division 01 Section Administrative Requirements.

2. Division 01 Section Mechanical, Refrigeration, Food Service Equipment and Electrical

Coordination.

3. Division 01 Section Quality Control.

4. Division 01 Section Closeout Procedures.

5. Division 07 Section Ethylene-Propylene-Diene-Monomer Roofing.

6. Division 07 Section Thermoplastic Membrane Roofing.

7. Division 23 Section Hangers and Supports for HVAC Piping and Equipment.

8. Division 23 Section Fuel-Fired Heaters.

1.2 QUALITY CONTROL

A. The following publications form a part of this Specification to the extent they are applicable:

1. Division 01 Section Quality Control.

2. ASTM A167 - Stainless and Heat-Resisting Chromium-Nickel Steel Plate, Sheet, and Strip.

3. ASTM A525 - Steel Sheet, Zinc-Coated (Galvanized) by the Hot-Dip Process, General

Requirements.

4. ASTM A527 - Steel Sheet, Zinc-Coated (Galvanized) by the Hot-Dip Process, Lock-Forming

Quality.

5. ASTM A569 - Steel, Sheet and Strip, Carbon (0.15 Maximum Percent) Hot-Rolled

Commercial Quality.

6. NFPA 54 (ANSI Z223.1) - The National Fuel Gas Code.

7. UL 103 - Standard for Factory Built Low Heat Chimneys.

8. UL 441 - Standard for Gas Vents.

9. UL 641 - Standard for Low Temperature Venting Systems.

10. UL 959 (ANSI Z181.1) - Medium Heat Appliance Factory Built Chimneys.

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BREECHINGS, CHIMNEYS, AND STACKS

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1.3 DEFINITIONS

A. Breeching: Vent Connector.

B. Chimney: Primarily vertical shaft enclosing at least one vent for conducting flue gases outdoors.

C. Smoke Pipe: Round, single wall vent connector.

D. Vent: That portion of a venting system designed to convey flue gases directly outdoors from a vent connector or from an appliance when a vent connector is not used.

E. Vent Connector: That part of a venting system that conducts the flue gases from the flue collar of an appliance to a chimney or vent, and may include a draft control device.

1.4 DESIGN REQUIREMENTS

A. Factory built vents and chimneys used for venting natural draft appliances shall comply with NFPA 211 and are UL listed and labeled.

B. Design chimneys and vents metal stacks for wind loading and seismic loads specified in Division 01 Section Summary of Work.

1.5 SUBMITTALS

A. Submittals for Review:

1. Division 01 Section Administrative Requirements.

2. Product Data: Provide data indicating factory built chimneys, including dimensional details of components and flue caps, dimensions and weights, electrical characteristics and connection requirements.

3. Operation and Maintenance Data.

1.6 QUALIFICATIONS

A. Manufacturer Qualifications: Company specializing in manufacturing the Products specified in this Section with minimum three years documented experience.

1.7 REGULATORY REQUIREMENTS

A. Conform to IMC and NFPA 54 (ANSI Z223.1) code for installation of natural gas burning appliances and equipment.

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BREECHINGS, CHIMNEYS, AND STACKS

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PART 2 - PRODUCTS

2.1 LISTED TYPE B DOUBLE WALL GAS VENTS

A. Provide for AGA draft hood appliances.

B. Fabrication: Inner pipe of sheet aluminum, and outer pipe of galvanized sheet steel, tested in compliance with UL 441.

C. Provide rain cap, ventilated thimble, storm collar, flashing and other accessories required for a complete installation.

2.2 LISTED TYPE BW DOUBLE WALL METAL STACKS

A. Provide for forced draft appliances.

B. Provide double wall metal stacks, UL listed, for use with building heating equipment, in compliance with NFPA 211.

C. Fabricate with 1 inch minimum air space between walls. Construct inner jacket of 20 gage ASTM A167 stainless steel. Construct outer jacket of aluminum coated steel stainless steel 24 gage for sizes 10 inches to 24 inches and 20 gage for sizes 28 inches to 48 inches.

D. Accessories, UL labeled:

1. Ventilated Roof Thimble: Consists of roof penetration, vent flashing with spacers and storm collar.

2. Exit Cone: Consists of inner cone, and outer jacket, to increase stack exit velocity 1.5 times.

3. Stack Cap: Consists of conical rainshield with inverted cone for partial rain protection with low flow resistance.

2.3 CONCENTRIC VENT/FLUE AND COMBUSTION AIR INTAKE DUCT

A. 24 gage or heavier galvanized steel pipe with accessories provided by the appliance manufacturer.

B. The assembly shall be constructed to maintain air tightness of both the flue and intake duct.

2.4 LISTED SPECIAL GAS VENTS

A. Provide for Condensing gas appliances.

B. Fabrication: Double-wall metal vents, inner shell ASTM A 959, Type 29-4C stainless steel and outer jacket aluminized steel. Inner shell and outer jacket separated by at least a 1/2-inch airspace, tested according to UL 1738 and rated for 480 deg F continuously, with positive or negative flue pressure complying with NFPA 211.

C. Provide Manufacturers standard rain cap, ventilated thimble, storm collar, flashing and other accessories required for a complete installation.

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2.5 LISTED GREASE DUCTS

A. Provide for Type 1 commercial kitchen exhaust hood grease duct.

B. Fabrication: Double-wall metal vents, inner Shell: ASTM A 666, Type 304 stainless steel, Outer Jacket: Aluminized steel where concealed. Stainless steel where exposed. Inner shell and outer jacket separated by at least a 1-inch annular space filled with high-temperature, ceramic-fiber insulation, tested according to UL 1978 and rated for 500 deg F continuously, or 2000 deg F for 30 minutes; with positive or negative duct pressure and complying with NFPA 211.

C. Accessories: Tees, elbows, increasers, hood connectors, terminations, adjustable roof flashings, storm collars, support assemblies, thimbles, firestop spacers, and fasteners; fabricated from similar materials and designs as vent-pipe straight sections; all listed for same assembly. Include unique components required to comply with NFPA 96 including cleanouts, transitions, adapters and drain fittings.

PART 3 - EXECUTION

3.1 INSTALLATION

A. Install in accordance with manufacturer's instructions.

B. Install in accordance with NFPA 54 (ANSI Z223.1).

C. For Type B double wall gas vents, maintain UL listed minimum clearances from combustibles.

Assemble pipe and accessories as required for complete installation.

D. Level and plumb chimney and vents.

E. Clean chimneys and vents during installation, removing dust and debris.

F. At appliances, provide slip joints permitting removal of appliances without removal or dismantling of breechings, breeching insulation, chimneys, or stacks.

G. Provide minimum length of breeching to connect appliance to chimney. Provide Type B chimney continuously from appliances.

H. Seal between sections of positive-pressure vents and grease exhaust ducts according to manufacturer's written installation instructions, using sealants recommended by manufacturer.

I. Support vents at intervals recommended by manufacturer to support weight of vents and all accessories, without exceeding appliance loading

END OF SECTION