ASTM G158-23
(Guide)Standard Guide for Three Methods of Assessing Buried Steel Tanks
Standard Guide for Three Methods of Assessing Buried Steel Tanks
SIGNIFICANCE AND USE
4.1 This guide provides three methods for determining the suitability of a buried steel tank to be upgraded with cathodic protection.
4.2 This guide may be used to assess any UST, including non-regulated USTs.
4.3 This guide provides three alternative methods but does not recommend any specific method or application. The responsibility for selection of a method rests with the user.
4.4 This guide has specific suggestions for vendor provided information which should be requested and reviewed by the user.
SCOPE
1.1 This guide covers procedures to be implemented prior to the application of cathodic protection for evaluating the suitability of a tank for upgrading by cathodic protection alone.
1.2 Three procedures are described and identified as Methods A, B, and C.
1.2.1 Method A—Noninvasive with primary emphasis on statistical and electrochemical analysis of external site environment corrosion data.
1.2.2 Method B—Invasive ultrasonic thickness testing with external corrosion evaluation.
1.2.3 Method C—Invasive permanently recorded visual inspection and evaluation including external corrosion assessment.
1.3 This guide presents the methodology and the procedures utilizing site and tank specific data for determining a tank’s condition and the suitability for such tanks to be upgraded with cathodic protection.
1.4 While this guide provides minimum procedures for assessing a tank's condition, this guide does not provide minimum installation procedures or requirements for upgrades of the tank by cathodic protection.
1.5 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: G158 − 23
Standard Guide for
1
Three Methods of Assessing Buried Steel Tanks
This standard is issued under the fixed designation G158; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
INTRODUCTION
The purpose of this guide is to provide three methods of inspecting and assessing buried steel
tank(s) for corrosion damage and determining the suitability of these tanks prior to application of
cathodic protection.
1. Scope priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use.
1.1 This guide covers procedures to be implemented prior to
1.7 This international standard was developed in accor-
the application of cathodic protection for evaluating the suit-
dance with internationally recognized principles on standard-
ability of a tank for upgrading by cathodic protection alone.
ization established in the Decision on Principles for the
1.2 Three procedures are described and identified as Meth-
Development of International Standards, Guides and Recom-
ods A, B, and C.
mendations issued by the World Trade Organization Technical
1.2.1 Method A—Noninvasive with primary emphasis on
Barriers to Trade (TBT) Committee.
statistical and electrochemical analysis of external site envi-
ronment corrosion data. 2. Referenced Documents
1.2.2 Method B—Invasive ultrasonic thickness testing with
2.1 The most recent version of the following documents
external corrosion evaluation.
should be consulted as references by those using this guide:
1.2.3 Method C—Invasive permanently recorded visual in-
2
2.2 ASTM Standards:
spection and evaluation including external corrosion assess-
E114 Practice for Ultrasonic Pulse-Echo Straight-Beam
ment.
Contact Testing
1.3 This guide presents the methodology and the procedures
E797/E797M Practice for Measuring Thickness by Manual
utilizing site and tank specific data for determining a tank’s
Ultrasonic Pulse-Echo Contact Method
condition and the suitability for such tanks to be upgraded with
E1323 Guide for Evaluating Laboratory Measurement Prac-
cathodic protection.
tices and the Statistical Analysis of the Resulting Data
1.4 While this guide provides minimum procedures for E1526 Practice for Evaluating the Performance of Release
assessing a tank’s condition, this guide does not provide Detection Systems for Underground Storage Tank Sys-
3
minimum installation procedures or requirements for upgrades tems (Withdrawn 2002)
G51 Test Method for Measuring pH of Soil for Use in
of the tank by cathodic protection.
Corrosion Evaluations
1.5 The values stated in inch-pound units are to be regarded
G57 Test Method for Measurement of Soil Resistivity Using
as standard. The values given in parentheses are mathematical
the Wenner Four-Electrode Method
conversions to SI units that are provided for information only
G193 Terminology and Acronyms Relating to Corrosion
and are not considered standard.
4
2.3 ASNT Standard:
1.6 This standard does not purport to address all of the
ASNT SNT-TC-1A Personnel Qualification and Certifica-
safety concerns, if any, associated with its use. It is the
tion in Nondestructive Testing
responsibility of the user of this standard to establish appro-
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
1
This guide is under the jurisdiction of ASTM Committee G01 on Corrosion of Standards volume information, refer to the standard’s Document Summary page on
Metals and is the direct responsibility of Subcommittee G01.10 on Corrosion in the ASTM website.
3
Soils. The last approved version of this historical standard is referenced on
Current edition approved Dec. 1, 2023. Published January 2024. Originally www.astm.org.
4
approved in 1998. Last previous edition approved in 2021 as G158 – 98 (2021). Available from American Society for Nondestructive Testing (ASNT), P.O. Box
DOI: 10.1520/G0158-23. 28518, 1711 Arlingate Ln., Columbus, OH 43228-0518, http://www.asnt.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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G158 − 23
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2.4 AMPP (formerly NACE International) Standards: as part of the upgrade procedure. Further, for the purposes of
NACE SP0169 (formerly RP0169) Standard Practice – Con- this guide, it does not require manned ent
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: G158 − 98 (Reapproved 2021) G158 − 23
Standard Guide for
1
Three Methods of Assessing Buried Steel Tanks
This standard is issued under the fixed designation G158; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
INTRODUCTION
The purpose of this guide is to provide three methods of inspecting and assessing buried steel
tank(s) for corrosion damage and determining the suitability of these tanks prior to application of
cathodic protection.
1. Scope
1.1 This guide covers procedures to be implemented prior to the application of cathodic protection for evaluating the suitability
of a tank for upgrading by cathodic protection alone.
1.2 Three procedures are described and identified as Methods A, B, and C.
1.2.1 Method A—Noninvasive with primary emphasis on statistical and electrochemical analysis of external site environment
corrosion data.
1.2.2 Method B—Invasive ultrasonic thickness testing with external corrosion evaluation.
1.2.3 Method C—Invasive permanently recorded visual inspection and evaluation including external corrosion assessment.
1.3 This guide presents the methodology and the procedures utilizing site and tank specific data for determining a tank’s condition
and the suitability for such tanks to be upgraded with cathodic protection.
1.4 The tank’s condition shall be assessed using Method A, B, or C. Prior to assessing the tank, a preliminary site survey shall
be performed pursuant to Section 8 and the tank shall be tightness tested pursuant to 5.2 to establish that the tank is not leaking.
1.4 While this guide provides minimum procedures for assessing a tank’s condition, this guide does not provide minimum
installation procedures or requirements for upgrades of the tank by cathodic protection.
1.5 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of
regulatory limitations prior to use.
1
This guide is under the jurisdiction of ASTM Committee G01 on Corrosion of Metals and is the direct responsibility of Subcommittee G01.10 on Corrosion in Soils.
Current edition approved Aug. 1, 2021Dec. 1, 2023. Published August 2021January 2024. Originally approved in 1998. Last previous edition approved in 20162021 as
G158 – 98 (2016).(2021). DOI: 10.1520/G0158-98R21.10.1520/G0158-23.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
G158 − 23
1.7 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2.1 The most recent version of the following documents should be consulted as references by those using this guide:
2
2.2 ASTM Standards:
D2216 Test Methods for Laboratory Determination of Water (Moisture) Content of Soil and Rock by Mass
E114 Practice for Ultrasonic Pulse-Echo Straight-Beam Contact Testing
E797/E797M Practice for Measuring Thickness by Manual Ultrasonic Pulse-Echo Contact Method
E1323 Guide for Evaluating Laboratory Measurement Practices and the Statistical Analysis of the Resulting Data
E1526 Practice for Evaluating the Performance of Release Detection Systems for Underground Storage Tank Systems
3
(Withdrawn 2002)
G51 Test Method for Measuring pH of Soil for Use in Corrosion Evaluations
G57 Test Method for Measurement of Soil Resistivity Using the Wenner Four-Electrode Method
G193 Terminology and Acronyms Relating to Corrosion
4
2.3 ASNT Standard:
ASNT SNT-TC-1A Personnel Qualification and Certification in Nondestructive Testing
5
2.4 NACE InternationalAMPP (formerly NACE International) Standards:
RP-0169NACE SP0169 (formerly RP0169) Standard Recommended Practice-Control Practice –
...
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