ASTM_C_1081_-_98_2014.pdf

Designation:C108198(Reapproved 2014)Standard Specification forAsbestos-Cement Corrugated Fill For Use in CoolingTowers1This standard is issued under the fixed designation C1081;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers splash bar and corrugatedsheet type asbestos-cement products used as cooling tower fill.1.2 Drift eliminators or demisters,louvers,partitioning andcasing panels are covered in Specifications C1080.Asbestos-cement pipes are covered in Specification C296 and Specifi-cations C428.Asbestos-cement flat sheet fill(heat exchangesurfaces)are specified in Specification C1082.1.3 The values stated in the SI system are to be regarded asthe standard.The inch-pound units in parentheses are forinformation only.1.4 WarningBreathing of asbestos dust is hazardous.Asbestos and asbestos products present demonstrated healthrisks for users and for those with whom they come into contact.In addition to other precautions,when working with asbestos-cement products,minimize the dust that results.For informa-tion on the safe use of chrysoltile asbestos,refer to“Safe Useof Chrysotile Asbestos:A Manual on Preventive and ControlMeasures.”21.5 The following precautionary caveat pertains only to theTest Method portion,Section 8,of this Specification:Thisstandard does not purport to address all of the safety concerns,if any,associated with its use.It is the responsibility of the userof this standard to establish appropriate safety and healthpractices and determine the applicability of regulatory limita-tions prior to use.See 1.4 for a specific safety hazard.2.Referenced Documents2.1 ASTM Standards:3C150 Specification for Portland CementC296 Specification for Asbestos-Cement Pressure PipeC428 Specification forAsbestos-Cement Nonpressure SewerPipeC458 Test Method for Organic Fiber Content of Asbestos-Cement ProductsC459 Test Methods for Asbestos-Cement Flat ProductsC500 Test Methods for Asbestos-Cement PipeC1080 Specification for Asbestos-Cement Products OtherThan Fill For Cooling TowersC1082 Specification for Asbestos-Cement Flat Sheet forCooling Tower FillC1096 Test Method for Determination of Wood Fiber inAsbestos CementD2946 Terminology for Asbestos and AsbestosCementProducts2.2 DIN Standard:DIN 274 Asbestzement-Weilplatten43.Terminology3.1 DefinitionsThe definitions included in TerminologyD2946 are applicable to this specification.3.2 Definitions of Terms Specific to This Standard:3.2.1 autoclaved productProducts that have been treatedin a saturated steam atmosphere at between 689 and 1517 kPa(100 and 220 psi)for at least 8 h,and that contain portlandcement Type I(Specification C150)together with fine silica inthe ratio of 3:2 that can react to form calcium silicate reactionproducts.3.2.2 pressed productsProducts that are pressed singly orin stacks interlayered with templates,at a minimum pressure of12 MPa(1740 psi).3.2.3 pitchThe wave length in corrugated products.4.Classification4.1 Splash Bar Classification:4.1.1 Type ISplash bars consist of corrugated autoclavedpressed asbestos-cement sheets for the most demanding appli-cations that meet the requirements set forth in Table 1.1This specification is under the jurisdiction of ASTM Committee C17 onFiber-Reinforced Cement Products and is the direct responsibility of SubcommitteeC17.03 on Asbestos-Cement Sheet Products and Accessories.Current edition approved Dec.1,2014.Published December 2014.Originallyapproved in 1987.Last previous edition approved in 2008 as C1081 98(2008).DOI:10.1520/C1081-98R14.2Available from The Asbestos Institute,http:/ referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.4Available from Deutsches Institut fr Normunge,Beuth Verlaq GmbH,Auslieferung,Post Fach1107,D-1000 Berlin 30,Germany.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 4.1.2 Type IISplash bars consist of corrugated pressedasbestos-cement sheets for intermediate service that meetrequirements presented in Table 1.4.1.3 Type IIISplash bars are intended for less demandingservice that meet the requirements stated in Table 1.4.2 Corrugated Fill:4.2.1 Type ANon-autoclaved,compressed,corrugatedsheet,with a nominal thickness of 5 mm(316in.):Pitch107 mm(4.2 in.)Average minimum bending moment556 Nm/m(125 ftlbf/ft)Individual specimen minimum bending moment471 Nm/m(106 ftlbf/ft)Minimum density 1.6 g/cm3(100 lb/ft3)Maximum water absorption25%NOTE1Calculate bending moment in accordance with DIN 274.5.Ordering Information5.1 Splash Bars:5.1.1 State the type,dimensions,and quantity req