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ASTM_G_158_-_98_2016.pdf

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1、Designation:G15898(Reapproved 2016)Standard Guide forThree Methods of Assessing Buried Steel Tanks1This standard is issued under the fixed designation G158;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A n

2、umber in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.INTRODUCTIONThe purpose of this guide is to provide three methods of inspecting and assessing buried steeltank(s)for corrosion damage and determining t

3、he suitability of these tanks prior to application ofcathodic protection.1.Scope1.1 This guide covers procedures to be implemented prior tothe application of cathodic protection for evaluating the suit-ability of a tank for upgrading by cathodic protection alone.1.2 Three procedures are described an

4、d identified as Meth-ods A,B,and C.1.2.1 Method ANoninvasive with primary emphasis onstatistical and electrochemical analysis of external site envi-ronment corrosion data.1.2.2 Method BInvasive ultrasonic thickness testing withexternal corrosion evaluation.1.2.3 Method CInvasive permanently recorded

5、 visual in-spection and evaluation including external corrosion assess-ment.1.3 This guide presents the methodology and the proceduresutilizing site and tank specific data for determining a tankscondition and the suitability for such tanks to be upgraded withcathodic protection.1.4 The tanks conditi

6、on shall be assessed using Method A,B,or C.Prior to assessing the tank,a preliminary site surveyshall be performed pursuant to Section 8 and the tank shall betightness tested pursuant to 5.2 to establish that the tank is notleaking.1.5 While this guide provides minimum procedures forassessing a tank

7、s condition,this guide does not provideminimum installation procedures or requirements for upgradesof the tank by cathodic protection.1.6 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

8、information onlyand are not considered standard.1.7 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 regula

9、tory limitations prior to use.2.Referenced Documents2.1 The most recent version of the following documentsshould be consulted as references by those using this guide:2.2 ASTM Standards:2D2216 Test Methods for Laboratory Determination of Water(Moisture)Content of Soil and Rock by MassE114 Practice fo

10、r Ultrasonic Pulse-Echo Straight-BeamContact TestingE797 Practice for Measuring Thickness by Manual Ultra-sonic Pulse-Echo Contact MethodE1323 Guide for Evaluating Laboratory Measurement Prac-tices and the Statistical Analysis of the Resulting DataE1526 Practice for Evaluating the Performance of Rel

11、easeDetection Systems for Underground Storage Tank Sys-tems(Withdrawn 2002)3G51 Test Method for Measuring pH of Soil for Use inCorrosion TestingG57 Test Method for Field Measurement of Soil ResistivityUsing the Wenner Four-Electrode Method1This guide is under the jurisdiction of ASTM Committee G01 o

12、n Corrosion ofMetals and is the direct responsibility of Subcommittee G01.10 on Corrosion inSoils.Current edition approved May 1,2016.Published May 2016.Originallyapproved in 1998.Last previous edition approved in 2010 as G158 98(2010).DOI:10.1520/G0158-98R16.2For referenced ASTM standards,visit the

13、 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.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM Interna

14、tional,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 2.3 ASNT Standard:4ASNT SNT-TC-1A Personnel Qualification and Certifica-tion in Nondestructive Testing2.4 NACE International Standards:5RP-0169 Standard Recommended Practice-Control on Ex-ternal Corrosion on Unde

15、rground or Submerged MetallicPiping SystemsRP-0187 Standard Recommended Practice-Design Consid-erations for Corrosion Control of Reinforcing Steel inConcreteRP-0285 Standard Recommended Practice-Corrosion Con-trol of Underground Storage Tank Systems by CathodicProtection2.5 Environmental Protection

16、Agency Methods:6EPA SW 846 Test Methods for Evaluating Solid WasteEPA 371.1 Measurement of Sulfate Reducing Bacteria2.6 National Fire Protection Association(NFPA)7NFPA 329 Recommended Practice for Handling Under-ground Releases of Flammable and Combustible Liquids2.7 Underwriters Laboratories Inc.8UL 58 Steel Underground Tanks for Flammable and Com-bustible Liquids3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 buriedto be placed in the ground and covered withearth.3.1.2 ca

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