turbine duct work

8/13/2019 Turbine Duct work

1/4

SECTION 15081

Sheet Metal Ducts - Acoustical Lining Insulation

PART 1.00 - GENERAL

1.01 Summary

A. The work covered by this specification consists of furnishing all labor e!uip"ent "aterials andaccessories and perfor"ing all operations re!uired for correct fabrication and installation of airduct syste"s of sheet "etal lined with fibrous glass duct liner in accordance with applicable pro#ectdrawings and specifications sub#ect to ter"s and conditions of the contract$

B. All air duct syste"s operating at internal air velocities not e%ceeding rated duct liner li"itations as

listed below and internal air te"perature not e%ceeding &'() *+&+,.,. Duct liner products shall confor" to the re!uire"ents of ASTM ,+(+.D. The "anufacturers product identification shall appear on the air strea" surface./. Duct liner adhesive shall confor" to the re!uire"ents of ASTM , 0+1.). The finished duct syste" shall "eet the re!uire"ents of 2)3A 0(A and 0(4.5. Duct di"ensions shown on the plans are finished inside di"ensions.6. )abrication and installation shall confor" to "anufacturer7s reco""endations and to the

re!uire"ents of the latest edition of the 2orth A"erican Insulation Manufacturers Association8sFibrous Glass Duct Liner Standard *hereinafter referred to as 2AIMA )5DLS or of the Sheet Metaland Air ,onditioning ,ontractors 2ational Association HVAC Duct Construction Standards - Metaland Flexible *hereinafter referred to as SMA,2A 69A, D,S or the "anufacturersreco""endations.

1.02 ReferencesA. A"erican Society of Testing and Materials* ASTM

+. ASTM ,+(+&. ASTM ,0+1:. ASTM 5&+;. ASTM 5&&'. ASTM ,;&:

1. ASTM , '+or fabricated insulated duct sections and fittings to the #ob site and store ina safe dry place.

4. 3rotect "aterials fro" dust dirt "oisture and physical abuse before and during installation startupand co""issioning. ?et or conta"inated duct liner shall be replaced.

PART 2.00 - PRO*CTS

2.01 Insu!a%e( uc% Sys%emA. Allsupply ducts return ducts and fittings indicated on drawings shall be insulated with duct liner

"eeting the re!uire"ents of ASTM ,+(+and the additional following re!uire"ents$

197792531.doc 1


2/4

+. 6ave a li!uid water repellency rating not less than ; when tested in accordance with I2DA IST&C *:".,,. when tested in accordance with ASTM , '+&C :(( .(' .+& .&0 .'+ .1< .&C *:hr.s!.ft.) *(.(:0 ?>"., .&;

4tu.in>hr.s!.ft.) *(.(:' ?>".,H when tested in accordance with ASTM , '+


3/4

A. All portions of duct designated to receive duct liner shall be co"pletely covered with duct liner. All#oints shall be neatly butted and there shall be no interruptions or gaps. Duct liner shall be installedwith the 3rinted air strea" surface treat"ent e%posed to the air strea".

4. Duct liner shall be adhered to the sheet "etal with 0( *"ini"u" coverage of adhesive co"plyingwith the re!uire"ents of ASTM , 0+1.

,. All transverse edges that are not to receive sheet "etal nosing shall be coated. Longitudinal #ointsshall occur at the corners of ducts. If duct siFe and standard duct liner product di"ensions "ake

e%posed longitudinal #oints necessary such #oints shall be coated with adhesive designated for ductliner application and which "eets the re!uire"ents of ASTM , 0+1. Such #oints shall beadditionally secured with "echanical fasteners in accordance with 2AIMA )5DLS or SMA,2A69A, D,S as if they were transverse #oints.

D. Duct liner shall be additionally secured with "echanical fasteners co"plying with the re!uire"ents

2AIMA )5DLS or SMA,2A 69A, D,S and of the correct type for the duct liner being installed.

)asteners "ay be either weld-secured or i"pact-driven and shall be installed perpendicular to the

duct surface.. Mechanical fasteners shall not co"press the insulation "ore than +>


4/4

A. ,ontractor7 e"ployees shall be properly protected during installation of all insulation. 3rotection shallinclude proper attire when handling and applying insulation "aterials and shall include *but not beli"ited to disposable dust respirators gloves hard hats and eye protection.4. The contractor shall conduct all #ob site operations in co"pliance with applicable provisions of theEccupational Safety and 6ealth Act as well as with all state and>or local safety and health codes andregulations that "ay apply to the work.

197792531.doc 4

turbine duct work

Documents