ASTM_D_887_-_13.pdf

Designation:D88713Standard Practices forSampling Water-Formed Deposits1This standard is issued under the fixed designation D887;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 These practices cover the sampling of water-formeddeposits for chemical,physical,biological,or radiologicalanalysis.The practices cover both field and laboratory sam-pling.It also defines the various types of deposits.Thefollowing practices are included:SectionsPractice ASampling Water-Formed Deposits From Tubingof Steam Generators and Heat Exchangers8 to 10Practice BSampling Water-Formed Deposits From SteamTurbines11 to 141.2 The general procedures of selection and removal ofdeposits given here can be applied to a variety of surfaces thatare subject to water-formed deposits.However,the investigatormust resort to his individual experience and judgment inapplying these procedures to his specific problem.1.3 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.See Section 7,9.8,9.8.4.6,and 9.14 for specific hazards statements.2.Referenced Documents2.1 ASTM Standards:2D512 Test Methods for Chloride Ion In WaterD934 Practices for Identification of Crystalline Compoundsin Water-Formed Deposits By X-Ray DiffractionD1129 Terminology Relating to WaterD1193 Specification for Reagent WaterD1245 Practice for Examination of Water-Formed Depositsby Chemical MicroscopyD1293 Test Methods for pH of WaterD2331 Practices for Preparation and Preliminary Testing ofWater-Formed DepositsD2332 Practice for Analysis of Water-Formed Deposits byWavelength-Dispersive X-Ray FluorescenceD3483 Test Methods forAccumulated Deposition in a SteamGenerator TubeD4412 Test Methods for Sulfate-Reducing Bacteria in Waterand Water-Formed Deposits3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1biological deposits,nwater-formed deposits oforganisms or the products of their life processes.3.1.1.1 Discussion-The biological deposits may be com-posed of microscopic organisms,as in slimes,or of macro-scopic types such as barnacles or mussels.Slimes are usuallycomposed of deposits of a gelatinous or filamentous nature.3.1.2 corrosion products,na result of chemical or electro-chemical reaction between a metal and its environment.3.1.2.1 Discussion-A corrosion deposit resulting from theaction of water,such as rust,usually consists of insolublematerial deposited on or near the corroded area;corrosionproducts may,however,be deposited a considerable distancefrom the point at which the metal is undergoing attack.3.1.3 scale,na deposit formed from solution directly inplace upon a surface.3.1.3.1 Discussion-Scale is a deposit that usually will retainits physical shape when mechanical means are used to removeit from the surface on which it is deposited.Scale,which mayor may not adhere to the underlying surface,is usuallycrystalline and dense,frequently laminated,and occasionallycolumnar in structure.3.1.4 sludge,n a water-formed sedimentary deposit.3.1.4.1 Discussion-The water-formed sedimentary depositsmay include all suspended solids carried by the water and traceelements which were in solution in the water.Sludge usuallydoes not cohere sufficiently to retain its physical shape whenmechanical means are used to remove it from the surface onwhich it deposits,but it may be baked in place and be hard andadherent.1These practices are under the jurisdiction of ASTM Committee D19 on Waterand are the direct responsibility of Subcommittee D19.03 on Sampling Water andWater-Formed Deposits,Analysis of Water for Power Generation and Process Use,On-Line Water Analysis,and Surveillance of Water.Current edition approved Jan.1,2013.Published February 2013.Originallyapproved in 1946.Last previous edition approved in 2008 as D887 08.DOI:10.1520/D0887-13.2For 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.1.5 water-formed deposits,nany accumulation of in-soluble material derived from water or formed by the reactionof water upon surfaces in contact with the water.3.1.5.1 Discussion-Deposits formed from or by water in