H12.REV

PREFABRICATED CHIMNEYS AND BREECHINGS

NOTE: FINAL COPY: APRIL, 1987.

NOTE: THIS SECTION COVERS PREFABRICATED CHIMNEYS AND BREECHINGS USED ONLY WITH BOILERS, INCINERATORS, GENERATOR EXHAUST. SEE THE ABOVE SECTIONS AND H26 "SHEET METAL WORK"

Part 1 -	GENERAL

1)	WORK INCLUDED

A.	Work in this Section includes the providing of labor, materials, equipment and services necessary for a complete and safe installation in accordance with the contract documents, all applicable codes and authorities having jurisdication for the following

NOTE: INDICATE ALL WORK TO BE COVERED BY THIS SECTION. EDIT PORTIONS OF WORK INDICATED TO SUIT PROJECT REQUIREMENTS.

1.	Prefabricated chimneys and breechings.

2.	Draft inducers for refractory lined chimneys.

2)	RELATED WORK AND REQUIREMENTS

A.	Requirements of GENERAL CONDITIONS, DIVISION NO. 1 and Section GENERAL PROVISIONS FOR HEATING, VENTILATING AND AIR CONDITIONING WORK apply to all work in this Section

NOTE: EDIT TO SUIT PROJECT REQUIREMENTS. INCLUDE ONLY SECTIONS DIRECTLY AFFECTING WORK IN THIS SECTION

B.	Related work in the following Sections:

1.	BOILER PLANT

2.	SHEET METAL WORK

3.	INCINERATOR

4.	EMERGENCY GENERATOR

5.	ELECTRICAL

3)	REFERENCE STANDARDS

A.	Published Specifications' standards, tests or recommended methods of trade, industry or governmental organizations, apply to work in this Section

B.	Comply with all applicable national, state and local codes and refer to Section GENERAL PROVISIONS FOR HEATING, VENTILATING AND AIR CONDITIONING WORK for additional Reference Standards

4)	QUALITY ASSURANCE

A.	Breeching and chimneys shall be installed in accordance with requirements and recommendations of manufacturer and:

1.	Local air pollution control criteria

2.	Local building ordinance

3.	National Fire Protection Association (NFPA)

4.	Underwriters Laboratories (UL) VENTILATING

NOTE: FOR NEW YORK CITY

5.	Manufacture shall have a Material Equipment Approval number (MEA) of Bureau of Standards and Appeals number (BS&A) for the City of New York

NOTE: EDIT TO SUIT PROJECT REQUIREMENTS. INCLUDES REFERENCES ONLY DIRECTLY AFFECTING WORK IN THIS SECTION

5)	SUBMITTALS

A.	Submit shop drawings and product data for the following:

1.	Catalogs with construction details, dimensions installation information for the chimney, breeching, fittings expansion joints associated items and UL certification

2.	Chimneys and breeching layout drawing and section on a minimum of 3/8"=1'-0" scale. Drawing shall show location of anchors, expansion joints, neccessary fittings, cleanout doors, draft inducer and support system

3.	Manufacturer to submit data indicating: draft loss, temperature on surface of outer jacket and support loads.

Part 2 -	PRODUCTS

1)	BASE BID MANUFACTURERS

HIMNEY

A.	Chimney & Breeching: Air Management Inc., Model RE; Metalbestos model PS

B.	Refractory Chimneys and Breechings: Van-Packer Co.

HIMNEY

C.	Draft Inducer: Air Management Inc, Model PP Van-Packer Co.

NOTES: 1. MEDIUM HEAT APPLIANCES: APPLIANCE DEVELOPING TEMPERATURES BETWEEN 600 DEGREES F AND 1500 DEGREES F IN PORTIONS WHERE SUBSTANCES OR MATERIALS ARE HEATED OR BOILER OPERATING AT OVER 50 PSIG PRESSURE. APPLIANCE OTHERWISE CLASSED AS HIGH-HEAT MAY BE CONSIDERED AS MEDIUM HEAT IF NOT LARGER THAN 100 CUBIC FEET IN SIZE 2. LOW HEAT APPLIANCES: APPLIANCE DEVELOPING TEMPERATURES BELOW 600 DEGREES F IN PORTIONS WHERE SUBSTANCES OR MATERIALS ARE HEATED OR BOILER OPERATING AT NOT OVER 50 PSIG PRESSURE. APPLIANCE OTHERWISE CLASSED AS MEDIUM HEAT MAY BE CONSIDERED AS LOW-HEAT IF NOT LARGER THAN 100 CUBIC FEET IN SIZE 3. COORDINATE CHIMNEY PRODUCT WITH TYPE OF FUEL USED AND PRESSURE

2)	BREECHING AND CHIMNEY

A.	Breeching and chimney shall be in accordance with NFPA No. 211 for metal connectors for low heat appliances, for use with building heating equipment burning gaseous and liquid fuels

B.	Cleanout doors shall be located at chanes in direction and as indicated on drawings so the entire breeching can be cleaned without dismanting. Gauge steel for door shall not be less than that of the breeching. Door size shall be 20 inches x 14 inches or the same size as the breeching if tee is used. Cleanout door assembly shall be gas tight with 1/16 inch thick non-asbestos gasket and planed faces.

C.	Connections for gas sampling and smoke density indicators shall be provided. Draft dampers shall have vent extensions and connections for temperatureand draft sensors

NOTE: REVIEW LOCATION AND SUPPORT OF CHIMNEY AND BREECHING WITH STRUCTURAL ENGINEER

D.	Drain cap at the base of a vertical section shall be provided and piped to suitable drains. Supports, hangers and anchors shall be designed to carry not less than five times the breeching weight. Stacks shall be terminated as indicated on drawings and in accordance with local codes and supported by a substantial steel framework.

NOTE: USE ONLY WHEN BREECHING AND CHIMNEY HAVE A REFRACTORY LINER

E.	Breeching and chimney system shall be prefabricated with a refractory liner. System shall be of modular design and provide design and provide a complete system, including supports, for venting the products of combustion. The liner shall be made of acid-resistant refractory.

NOTE: SELECT APPLICABLE OPTION FROM THE FOLLOWING LISTINGS. SELECT OPTION 1 FOR STANDARD APPLICATION. SELECT OPTION 2 ONLY IF PROJECT REQUIRES THIS CONDITION - USE MODEL VHT

EMP

F.	Flue gas temperature:

1.	Up to 800 degrees F continuous.

2.	Up to 2000 degrees F intermittent.

G.	Flue gas temperature:

1.	Up to 2950 degrees F: Where refractory is under no load

EMP

2.	Up to 2400 degrees F: Where loads are applied to refractory

NOTE: BREECHING AND CHIMNEY WITHOUT REFRACTORY LINER.

H.	Inner steel which is exposed to flue gas shall be ----------- thick 304 stainless steel

I.	Surface temperature of outer shell shall not exceed --------- degrees F above ambient

NOTE: SELECT APPLICABLE OPTION OUTER JACKET FROM THE FOLLOWING LISTINGS. IF INSULATION IS REQUIRED, CONSULT MANUFACTURER FOR APPROPRIATE JACKET

STANDARD

J.	26 gauge aluminized steel jacket.

K.	26 gauge stainless steel, type 430.

L.	11 gauge galvanized steel jacket.

M.	3/16 inch black steel, with welded joints.

N.	1/4 inch black steel, with welded joints.

STANDARD

O.	Joint cement:

NOTE: SELECT APPLICABLE OPTION FROM THE FOLLOWING LISTINGS. OPTION 2 FOR FLUE GAS TEMPERATURES LESS THAN 350 DEGREES F

FLUE

1.	Acid resistant cement shall be supplied by manufacturer.

2.	Silicone sealant shall be supplied by manufacturer.

FLUE

P.	Joint bands shall be supplied by manufacturer.

Q.	Floor Support Section shall be refractory, 11 gauge steel with brackets welded to jacket

NOTE: SPARK ARRESTOR NOT REQUIRED ON BOILER OR GENERATOR.

R.	Spark arrestor: Provide 18 percent chromium and 8 percent nickel with stainless steel wire, minimum diameter of 0.10 in., 2 mesh per inch

S.	Guy bands 8 inch wide galvanized steel guy wire, galvanized 7 wire standard type. Both shall be furnish as required

T.	Wall flashing shall be galvanized steel.

U.	Anchor lugs shall be acid resistant coated cast iron.

V.	Insulated thimble: Provide 3 inch thick refractory well with 28 gauge corrosion resistant jacket

W.	Tee Section: Provide 90 degree or 45 degree as detailed. Basic construction shall be the same as typical straight section

NOTE: EDIT TO SUIT PROJECT REQUIREMENTS. INCLUDE ONLY REFERENCES DIRECTLY AFFECTING WORK IN THIS SECTION

1.	External stiffeners (above 24 inches in diameter) shall have angle rings and vertical angle stiffeners

VAN

X.	Expansion joints shall be a slide type joint. Expansion joints and guides shall be supplied by manufacture and located as shown on drawings and as required

VAN

Part 3 -	EXECUTION

1)	INSTALLATION

A.	Install chimneys and breeching in accordance with manufacturer's instructions

B.	Support breeching in accordance with manufacturer's printed instructions. Provide hinged inspection doors with gasket and locking device. Provide properly sized barometric damper on breeching as required

NOTE: FOR INCINERATORS ONLY

C.	Provide chimneys with fly ash screen.

D.	Support chimneys at bottom, roof, and intermediate levels. Intermediate spacing is recommended by manufacturer

E.	Install breeching with positive slope back to appliance.

F.	Provide drain and cleanout at bottom of chimney.

G.	Maintain Code-required clearances from combustible materials.

NOTE: SELECT APPLICABLE OPTION FROM THE FOLLOWING LISTINGS.

ROTECT

H.	Protect metal exposed to weather, with:

1.	One base coat.

2.	One finish coat.

3.	Rust resistant paint, similar to Rust-Oleum Corp., "Rust-O-Gylic TM"

I.	Protect metal exposed to weather as specified in Section "PAINTING"

J.	Metal exposed to weather will be painted under another Section of the Specifications corrosion resistant

ROTECT