Document wK3djkkG8NOmpyQ7yq2YyEM1d

182 (Armstrong *V S COR C a M * N V LANCASTER, PA. ASHRAE Guide And Doto Boot ARMSTRONG INSULATION PRODUCTS FOR MECHANICAL SYSTEMS Armaflex Pipe Covering Armaflex Sheet Armaglas Duct . Armaflex Insulations Armstrong Armaflex is a foamed plastic insulating material available in flexible and rigid pipe covering and in flexible sheet form. These insulations are used to prevent excessive heat gain or loss and to stop damaging condensation and frost formation on liquid cooling and heating lines, chilled water and other piping, and on ducts, tanks, vessels, and equipment of all types. Armaflex Insulations have a fine, closed cellular structure and are vapor barriers in themselves, so no separately ap plied vapor barrier is required. The extreme flexibility of Arm aflex 22 Pipe Covering and Sheet Insulation speeds and simplifies their application. Rigid Armaflex has load-bearing properties and can be used at hanger locations and on pip ing subject to mechanical abuse or compression. All three 'products are non-shiny black in color, have smooth surfaces, and are exceptionally clean to handle. Because of high insulating efficiency and vapor resistance, Armaflex Insulations in engineered wall thicknesses will pre vent condensation under varying design conditions. For specific thickness recommendations, call your nearest Armstrong Office. Typical Physical Properties of Armaflex Density. Ib/cuft, (avg.)................................ Upper use limit, F...................................... Lower use limit. F...................................... Thermal conductivity. Btu/hr sqft (F/in) 70F mean temp................................. Thermal stability, % shrinkage 28 days. 220F ................................ Water vapor transmission, perm-in____ (C355-63T wet cup) Water absorption, % by volume 28 days Immersion......................... ASTM D1056-62T........................... Air transmission cuft/hr *qft/in; 10* water............ Ozone resistance ......................................... Odor ............................................................... Firs rating, ASTM D-1G92-59T .............. Armaflex Insulations Including Rigid ................... 5-6 ...................... 220 ................ --100 ..................... 0.26 .............. S.S-6.5 ... less than 0.1 ....................... i.t ... less than 10 less than O.03 ................... good ......... negligible self-extinguishing by this test Well thickness. inches (nominal) .... Inside diameter. Inches . Length of sections, feet . Width and length, inches Thickness, inches............ Armaflex 22 Pipe %. K. Y. % to 10% 6 Armaflex 22 Sheet 36x48 Ktol (Vi' Increments) Armaglas Duct There are two types of Armstrong Armaglas Duct Systems-- rectangular and round. The rectangular system is shop or field fabricated from a factory-made glass-fiber board with a full-hard aluminum facing. The round system is made up at the factory in 6-foot lengths with aluminum or vinylplastic casing and is shipped ready to install. Both types are designed for residential or commercial forced-air heating and air-conditioning applications and combine air duct, thermal insulation, and sound absorber in one easy-to-install material. Boards for the rectangular system are made In I* and 1 V&* thicknesses, 48* wide, and in lengths from 48* to 120*. The 6-foot lengths of the round system are available with inside diameters from 4* to 36*. The glass fibers used in making up rectangular and round duct are molded to a density of 3 to 31/* pounds per cubic foot Typical Properties of Armaglas Duct Thermal conductivity, Btu/hr sqft (F/in) 75F mean temperature Maximum upper temperature Omit for continuous use, F (Internal air) Maximum internal static pressure. Inches of water Plastic casing Aluminum casing Air erosion (5500 ft/mln air velocity) (2000 ft/mIn air velocity) Fire resistance (CS-131-46, modified for pipe covering) Flame spread U-L building unit fire hazard classification Plastic casing (Aluminum pigmented polyvinyl chloride) Thickness, inches Water vapor transmission. perms (ASTM wet cup) Fire resistance Aluminum casing Thickness, inches Water vapor transmission, perms (ASTM wet cup) Fire resistance Round Rectangular 0.22 0.22 250 250 1*4 2 None incombustible Incombustible -- 5-10 .004 1.12 Self-extinguishing .003 0 Incombustible .003 0 Incombustible Catalog Data Section % - rr 183 'fe My'; F- - .*>' t . Oxide scale is a product of brazing. It forms on .the inside wall of the ACR tube, then drops off to - contaminate the entire circuit. It could have hap-f pened in the most careful installation. But now the' most careful installation employs Phelps. -.f . ' Dodge Nitrogen-filled ACR tube* * "v - tYou start with a perfectiy clean and dry tube^v ' ^ ` .... * The nitrogen is plugged in. It stays'jn until theXj. -- '* v -- ,, _ plug is removed. .Then it^es^pesvery "slowly ^ . ,,\J-`'-.A r f. "keeping impurities from ^entering the tube.-:The~-'; ,, / - - l.'v. same happens during brazing.'Only inaddition to-/. .* 7-*v- ;>:' -keeping impuritiesout, thenitrogen virtually elim- ? - j M -1 .UUIllWI:| -llUUCIl^;^1-^'UnusedfSportion.s'`'ofTube*do;notJose^their.'pVo-- - FI LLtUAIfHI Ubta- ni'Y^n^On'^TMnif^ -^tecrion^ everfjOhey'have been.temporarily .unplugged?! repeat,-,tiw^asescapes/quite slowly: - :N`- (*?.-. wp? j'r rAAssuuffffiicciieennttaammoouunntt w^riiNilrreerrrriaiaiirriiiirriitthhee ttuubbee ttoo pprroo:.' * H wJ I;`I IVC E rwj Ttect itfor!future'use>The'soonerit is^replugged^ '^^owever.-the^more-nitrogen there will bVleftinr-- OXIDESCALE TiThe.orily tooTrequired forthe^removal xSlfiaSM ^'iarici'iriserUtiopn.obf the.'.ppluluggssjis aa;ppaairirojjf plieerrssr^ r 1?flC^DCCDintDflTinil&T"f.iuls5ee''ao^iiNf NrtrrtroogM^hh-fjifliled^r;AACCRR^ttuUlsle3^0ohh^'vyoufrnrnee^x|t'i'/^^^^^^^w^-|f--;-j^ i; rUr^lltrniUfcnfiMUil^viristallation lt is'available'throu`gh^PherpsJOb'd6*ery-!?;y ^ i)