Document rxKNwMgjBKXQL3a346d0GOVkG

A .iA PIIs No. 37-D-2 ARMASPRAY16 SPECIFICATIONS 19S7 EDITION -- REVISED (Armstrong CONTRACTING AND SUPPLY CORPORATION LANCASTER, PENNSYLVAWA ivm&s? WV-05522 A.I.A. H ie N o. 37*t>*^ ARMASPRAY 16 SPECIFICATIONS for High Temperature Applications How to use these Specifications To form a complete specification, simply copy all paragraphs except those not pertinent to the job at hand PROPERTIES OF ARMASPRAY16 Description Armaspray 16 is a blend of mineral wool fibers, as bestos fibers and inorganic binders. The process and equipment used in preparation of the mineral wool is covered by U. S. Talent 3,222,924. This highly refined mineral wool assures optimum physical characteristics of the end product. The product is processed from 50 lb. bales of com pressed dry material--at the job site--through the special Armaspray Spraying Machine. The Armaspray 16 is dampened in mid-air by atomized water as it leaves the spray gun. The semi-plastic material is then pressed or tamped with wooden or metal tools to produce a smooth surface and a monolithic coating. Typical Properties Maximum Service Temperature {ASTM C 411-61).................................................... ...................... 1600 F. Fusion Temperature ........................................................................................................................... 2200* F. Fired Shrinkage....................................... ................. 1200* F. 24 hrs. soak, 1.5% Unoar change. Density (after spraying and drying)............................ ...................................................10 to 14 lbs,/cu. ft. Thermal Conductivity (ASTM C 18247)................................................. 0.34 Btu/hr. sq. ft. (F/in.) @ 200 0,44 Btu/hr. sq. ft. (F/in.) @ 400 Compressive Strength (ASTM C 165-54)............ 7 to 12 psi (25% compression) @ 10 to 14 ibs./cu, ft;- - Specific Heat (ASTM C 351*61)................................... ..............................................................2i Btu/ib./F. Chloride Content, Max....................................................................................................................... 20 p.p.m. Hygroscopicity........... .............................................. 1.5% gain In weight after drying to constant weight. Then exposed to air at 70 F. and 90% R.H. for 14 days. Drying....................................... 24 hours at 73.4 F., 50% R.H. 2' of air per minute. (Sample 1.5" thk.) Curing ......................................................................... . Reaches 90% of ultimate strength in seven days. Setting Time .............. ...................................................... 2 to 3 hours, depending on ambient conditions, Combustibility ........................................... Incombustible in accordance with ASTM C411 up to 1600" F. Corrosion .................................................................................. Does not contribute to the corrosion of steel. Thermal Conductivity 338758 ENGINEERS' AND ARCHITECTS' SPECIFICATIONS Brief Specifications Furnish and install Axmaspray 16 in the areas listed below or where shown on the drawings. All products covered in this specification are to be installed in accordance with procedures prescribed and approved by Armstrong Contracting and Supply Corporation, Complete Specifications Scope 1. General This specification covers the furnishing, delivering, unloading, hauling, storing, protection, and applica tion of Annaspray 16 to complete all insulated sur faces as shown on the drawing or herein specified. 2. Work Included The contractor shall furnish all supervision, labor, materials, tools, and equipment to perform the work specified herein. 3. Supplied byOwner Owner shall furnish 230 volt, single phase, 85 amp electrical power and potable water at a minimum flow rate of 2 gallons per minute. Materials 4. Insulation The insulation material shall be Armaspray 16 as supplied by Armstrong Contracting and Supply Corporation, Lancaster, Pennsylvania, applied to result in a density of approximately 20*14 lbs. per cubic foot aits* spraying, pressing, and normal drying. 5. Finishing Materials a. Finish shall be Armstrong No. 10 Cement as supplied by Armstrong Contracting and Supply Corporation. b. Finish shall be a breathing type weather proof mastic, compatible with Atmespray 26 and Armstrong No. 10 Cement and applied and reinforced as recommended by the man* ufecturer of the mastic. c. Finish shall be aluminum sheet metal, cor rugated or smooth, ot suitafole tfafcfercess*emd furnished with an attached moisture barrier. 6. General (For Tanks, Vessels, Equipment, Piping 14* and oveT, Ducts, Breeching, and all Conventional Flat or Curved Surfaces Requiring Insulation, For steam turbines see Special Procedure, Item 10) a. Surface Preparation--prepare as necessary, removing all grease, dirt, and loose ma terials such as flaking paint and rust likely to interfere with bond of Annaspray to base -* surface. 6. Where it is found desirable to apply Annaspray 16 in more than 1 layer, the surface of the first layer shall be wetted with the spray water before the 2nd layer is applied. c. Provisions shall be made by Others to pro tect the Armaspray 16 insulation surfaces from foottraffic and other severe mechanical abrasion. 338759 3 7. Armaspray Application of Armaspray 16 shall be carried out solely by Armstrong Contracting and Supply Cor poration, and shall be: a. By silled mechanics thoroughly trained by Armstrong Contracting and Supply Corporatjon. b. Applied with approved AmaspTay ma chinery, and e. Even in texture and applied to density and thickness as defined in this specification and listed in drawings and written instructions issued for this specific contract 8. Supports Although in some instances Armaspray 16 can be considered self-supporting and requiring no sup- port, mechanical supports are more generally re quired as detailed below, NOUS 1: In ali cases where excessive vibration occurs, mechanical supports are required even though they may not otherwise be specified NOTE 2; Regardless of the thickness of insulation, support rings are required on a minimum of 20' centers on all vertical equipment. a. For all Vertical Tanks, Vessels, and Equipment Up to 2" in thickness and where insulation completely envelops the surface, that is, where it can 1 tied into itself such as around the tank, etc.--no mechanical sup ports are required except aa noted in specj&l NOTES J rx6 2 above. Above 2" and up to 4" in thickness--re inforce with a system of 10 gauge pms welded to the insulated surface on 24" centers and 1" 20 gauge hexagonal mesh (galvanized or Monel, as specified) fas tened on the surface of the insulation with speed clips to the pins. Above 4" and up to 8" thickness--rein force with a system of 10 gauge pins welded to the insulated surface on 18" centers and 4" x 4" squares of galvanized 20 gauge W hardware cloth, fastened with speed clips to the pins at the mid point of the insulation thickness and with 1" 20 gauge hexagonal wire mesh (galva nized or Monel, as specified) fastened on the surface of the insulation with speed clips to the pins. b. For Horizontal Tanks, Vessels, and Equipment Up to 2" in thickness and not exceeding 4$" in diameter--no mechanical supports arc required except as noted in special NOTE i above. Above 2" and up to 4" in thickness and/or over 48" in diameter--reinforce bottom 180 of the main body and the tank, vessel or equipment heads with a system of 10 gauge pins welded to the insu lated surfaces on 24" centers aDd 1" 20 gauge hexagonal wire mesh (galvanized ou Monel, as specified) fastened on the sur face of the insulation with speed clips to the pins. Above 4" and up to 8" in thickness--re inforce the main body and tank, vessel or equipment heads with a system of 10 gauge pins welded to the insulated sur faces on 18" centers and 4" x 4" squares of galvanized 20 gauge hardware cloth 4 338760 fastened with speed clips to tho pins at the mid point of the insulation and with 1" 20 gauge hexagonal wire mesh (galva nized or Monel, as specified) fastened on the surface o! the insulation with speed dips to the pins. c. For Ducts and Breeching Up to 4" in thickness--reinforce all sides of the duct or breeching with a system of 10gauge pins welded to the exteriorof the surfaces to be insulated < 12" on center on the bottom and 18" on the sides and top) and 1" 20 gauge hexagonal wire mesh (galvanized or Monel, as specified) fas tened on the surface of the insulation with speed clips to the pins. Above 4" and up to 8" in thickness--re inforce all sides of the duct or breeching with a system of 10 gauge pins welded to the exterior of the surfaces to be insulated (12" on center on the bottom and 18" on the sides and top) and 4" x 4" squares of galvanized 20 gauge hardware cloth fastened with speed washers to the pins at the mid point of the insulation thick ness ond with !" 20 gauge hexagonal wire mesh (galvanized or Monel, aa specified) fastened on the surface of tbe insulation with speed clips to tho pins. 9. Finishes a. Indoor Finish (1) Exposed Armaspray 18---in concealed spaces and where the insulation is not exposed to mechanical abrasion, Arma spray, after being pressed to desired thickness, may be left exposed without impairing its performance. Wetting the surface plus steel troweling will further improve tbe appearance. (2) Armstrong Armstemp Ho. 10 Cement --after Armaspray has been applied and pressed to the proper thickness, apply 1" hexagonal 20 gauge wire mesh (galvanized or Monel, as specified) stretching, lacing, and securely fasten ing it to itself or to pin supports. Pro- tact comers on square or rectangular equipment with surface comer beads. Over the wire mesh, trowel a %" coat of Armstrong Armatemp No. 10 Cement to a smooth finish, In areas larger than approximately 8' in either direction, score Armatemp Cement prior to dry ing with a cement finisher's tool through to the Armaspray to control cracking. 'Scoring should be in the form of panels about 4' square. (3) Canvas Finish--apply (6 or 8 oz. canvas as specified) over Armatemp No. 10 Cement reinforced as in Item (2) above lapping fabric seams a minimum of 2" using Armstrong Insalcolor, diluted to lagging consistency. Finish with two coats of Armstrong Xnsulcoior (color as selected) at a rate of about 150 aq. ft. per gallon per coat. Eliminate scoring of Armatemp No. 10 Cement specified in Section 8a (2). 338761 5 b. Outdoor Finish (X) Weatherproof Mastic--after Armespray has been applied, pressed to the proper thickness, and allowed to dry, apply the weatherproof mastic as speci fied by the manufacturer, using the supporting hexagonal metal mesh, if any, as the reinforcing medium,' other wise, apply layer o! glass membrane or wire mesh as specified by the finish manufacturer. (2) Hard Weather Finish--After Annaspray has been applied and pressed to the proper thickness, apply 1" hex agonal 20 gauge wire mesh <galvanized or Monel, as specified in Section 9a (2).) Over this apply Armstrong No. 10 Cement to a thickness of approxi mately Additionally finish as above under Section 9b (1}- (3) Corrugated Aluminum Jacketing with Factory Applied Moisture Barrier-- After the Armaspray has been applied and pressed to proper thickness, apply the aluminum jacketing overlapping at all joints and bending and supporting with the use of "S" clips as per standard industry practice. 20. Steam Turbines (Special Standardized Procedure for Insulating Steam Turbinas) a. Surface Preparation--prepare as necessary, removing all grease, dirt, and loose material such as flaking paint, and rust likely to in terfere with bond of Armaspray to base surface. b. Supports--Supports are required on the bottom half of the turbine casing in the form of either 10 gauge welded pins of the proper length, welded to the lower half of the casing on 18" c<vr>:s, or \\H studs fastened vn the same centers through drilling and tapping. c. Armaspray Application---Armaspray 16 shall be built up U> therequired thickness in a minimum of two layers and where adjacent surfaces have heavier thicknesses, a third layer is recommended. The surface of the ap plied layer of insulation shall be wetted with the spray water before the successive layer is applied whenever sufficient time has elapsed between the two operations to allow the-firstlayer -to-dty. Spraying sequence shall ha in the following order: The top half of the turbine casing, steam transfer lines above the casing, flanges, steam main to casing, valve chests andauxiliaries, followed by the underside of the turbine. Spray second layer to approximately greater than the required thickness and press to final thickness. After guide layer is complete, repeat the procedure to adjacent areas until the top half is covered. Follow the same procedure to insulate the bottom half of the casing, reinforc ing each layer with the use of 4" x 4U squares of 20 gauge galvanized i" hardware cloth fastened with speed washers to the pms located on IS" centers as detailed in 10b above. <2) Flange Bolts--wrap bolts shove flanges with asbestos paper or cloth and secure with wire, Pack space between bolts with dry Armaspray 16 fiber. (3) Flanges--taper Armaspray 16 into cas ing at flanges to provide easy removal Adhere asbestos paper, % the length of thetaperwitheodkim^iUcafce or-staples and spray Armaspray 16 to the paper. d. Finish (1) Metal Casing--leave Armaspray 16 in natural pressed state. Do not com pletely close eating until all moisture has been evaporated; (1) Turbine eating and transfer lines--A suitable area on the casing shall be chosen for a guide. The initial layer shall be sprayed to approximately 1%". This layer is not pressed, but consoli dated with the edge of a steel trowel to approximately 1 forming a cross pattern. (2) Armstrong Armatemp No. 10 Cement --finish Armaspray 16 with %" coat of Armatemp No. 10, reinforced with 1" 20 gauge galvanized wire mesh (Monel or stainless as specified), securely fas tened to supports. When dry, score in 4' square panels through to the Arma spray 16 using a cement finishing tool. 6 338762 SttfS OFFICES IM PRINCIPAL CITIES, INCLUDING... i os Angeles, C*MUxtsvm Ky. n. r. 338*763