ASTM G20-10(2015)

Standard Test Method for Chemical Resistance of Pipeline Coatings

SIGNIFICANCE AND USE
4.1 The data obtained for short-term tests are of interest only in eliminating the most unsuitable materials or for indicating a probable order of resistance in any particular media.  
4.2 Test conditions should take into account the manner and duration of immersion, the reagent, the temperature of the system, the area exposed above and below the liquid level, and other performance factors selected for the particular test.
SCOPE
1.1 This test method is intended for evaluating the resistance of pipe coating materials when exposed to various concentrations of reagents or suspected soil contaminants. The test serves as a guide to investigators wishing to compare the relative merits of pipe-coating materials in specific environments. The choice of reagents, concentrations, duration of immersion, temperature of test, and properties to be reported are necessarily arbitrary and should be chosen to reflect conditions known to exist along the pipeline right-of-way.  
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.  
1.3 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 and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 30-Nov-2015
• ICS: 87.040 - Paints and varnishes
• Technical Committee: D01 - Paint and Related Coatings, Materials, and Applications
• Drafting Committee: D01.48 - Durability of Pipeline Coating and Linings

Relations

• Replaced By: ASTM G20-10(2019) - Standard Test Method for Chemical Resistance of Pipeline Coatings
• Effective Date: 01-Oct-2019

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: G20 − 10 (Reapproved 2015)
Standard Test Method for
Chemical Resistance of Pipeline Coatings
This standard is issued under the fixed designation G20; the number immediately following the designation indicates the year of original
adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 3. Summary of Test Method
1.1 This test method is intended for evaluating the resis-
3.1 This test method consists of an immersion-type test in a
tance of pipe coating materials when exposed to various
closed container where coated pipe specimens are in long-term
concentrations of reagents or suspected soil contaminants. The
contactwithboththeliquidandvaporphaseofthetestreagent.
test serves as a guide to investigators wishing to compare the
Specimens exposed in this manner are inspected for visible
relative merits of pipe-coating materials in specific environ-
signs of chemical attack. Subsequent tests for cathodic dis-
ments. The choice of reagents, concentrations, duration of
bonding in accordance with Test Method G8, or penetration
immersion, temperature of test, and properties to be reported
under load in accordance with Test Method G17, may be
are necessarily arbitrary and should be chosen to reflect
applied to determine if the specimens have undergone any loss
conditions known to exist along the pipeline right-of-way.
of mechanical or bonding properties.
1.2 The values stated in SI units are to be regarded as the
4. Significance and Use
standard. The values given in parentheses are for information
only.
4.1 The data obtained for short-term tests are of interest
1.3 This standard does not purport to address all of the only in eliminating the most unsuitable materials or for
indicating a probable order of resistance in any particular
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro- media.
priate safety and health practices and determine the applica-
4.2 Test conditions should take into account the manner and
bility of regulatory limitations prior to use.
duration of immersion, the reagent, the temperature of the
system, the area exposed above and below the liquid level, and
2. Referenced Documents
other performance factors selected for the particular test.
2.1 ASTM Standards:
D543 Practices for Evaluating the Resistance of Plastics to
5. Apparatus
Chemical Reagents
5.1 Thickness Gage, capable of measuring the coating
D883 Terminology Relating to Plastics
thickness in the manner prescribed by Test Method G12.
G8 Test Methods for Cathodic Disbonding of Pipeline Coat-
5.2 Test Container—Atransparent closed container, sized to
ings
completely encase the pipe specimen and large enough to
G12 Test Method for Nondestructive Measurement of Film
provide adequate exposure to both the liquid and vapor states
Thickness of Pipeline Coatings on Steel (Withdrawn
of reagent.
2013)
G17 Test Method for Penetration Resistance of Pipeline
NOTE 1—For example, a 2-L (2.0-qt) capacity, Mason-type jar with a
Coatings (Blunt Rod)
70-mm (2.75-in.) diameter neck has been found suitable for use with 2 in.
pipe and is illustrated in Fig. 1.
5.2.1 To avoid pressure build-up within the test containers,
This test method is under the jurisdiction of ASTM Committee D01 on Paint
the threaded cup shall be replaced with a solid-rubber stopper.
and Related Coatings, Materials, andApplications and is the direct responsibility of
A positive venting device, such as a water seal, shall be used
Subcommittee D01.48 on Durability of Pipeline Coating and Linings.
when testing with volatile solvents at elevated temperatures.
Current edition approved Dec. 1, 2015. Published December 2015. Originally
approved in 1971. Last previous edition approved in 2010 as G20 – 10. DOI:
5.2.2 A separate container shall be used for each test
10.1520/G0020-10R15.
specimen.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
5.3 Oven or Constant-Temperature Room or Bath—To en-
Standards volume information, refer to the standard’s Document Summary page on
sure uniformity of test results, the test cells and specimen shall
the ASTM website.
be maintained at the test temperature 65°C (9°F) over the
The last approved version of this historical standard is referenced on
www.astm.org. duration of the test period.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
G20 − 10 (2015)
8. Test Specimen
8.1 The test specimen shall be prepared with its surface
preparation and coating procedures equivalent to that of coated
pipe. A control specimen shall be retained for comparison.
8.2 In order to utilize the test container specified in 4.2, the
pipe specimen, with end caps, shall be restricted to a maximum
overall length of 180 mm (7.0 in.) and a diameter of 65 mm
(2.5 in.).
8.3 Both ends of the pipe specimens shall be plugged with
inert stoppers and coated with an epoxy-base or other suitable
coating material.
8.4 Specimens with Holidays:
8.4.1 A holiday shall be made in the surface of the coated
pipe specimen at a point 25 % of the distance between the end
Dimensions
caps. It shall be made by drilling a radial hole through the
A—70 mm (2.75 in.) Jar Opening
coating so that the angular cone point of the drill will fully
B—45 mm (1.75 in.) Holiday Location
C—90 mm (7.00 in.) Length of Pipe Specimen enter the steel where the cylindrical portion of the drill meets
the steel surface. The drill diameter shall not be less than three
NOTE 1—Dimensions shown for 2 in. IPS pipe.
times the coating thickness, but it shall never be smaller than 6
FIG. 1 Chemical Immersion Test Schematic of Test Cell
mm (0.25 in.) in diameter. The steel wall of the pipe shall not
be perforated.
5.4 Auxiliary Testing De
...

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: G20 − 10 G20 − 10 (Reapproved 2015)
Standard Test Method for
Chemical Resistance of Pipeline Coatings
This standard is issued under the fixed designation G20; 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.
1. Scope
1.1 This test method is intended for evaluating the resistance of pipe coating materials when exposed to various concentrations
of reagents or suspected soil contaminants. The test serves as a guide to investigators wishing to compare the relative merits of
pipe-coating materials in specific environments. The choice of reagents, concentrations, duration of immersion, temperature of test,
and properties to be reported are necessarily arbitrary and should be chosen to reflect conditions known to exist along the pipeline
right-of-way.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.3 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 and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2.1 ASTM Standards:
D543 Practices for Evaluating the Resistance of Plastics to Chemical Reagents
D883 Terminology Relating to Plastics
G8 Test Methods for Cathodic Disbonding of Pipeline Coatings
G12 Test Method for Nondestructive Measurement of Film Thickness of Pipeline Coatings on Steel (Withdrawn 2013)
G17 Test Method for Penetration Resistance of Pipeline Coatings (Blunt Rod)
3. Summary of Test Method
3.1 This test method consists of an immersion-type test in a closed container where coated pipe specimens are in long-term
contact with both the liquid and vapor phase of the test reagent. Specimens exposed in this manner are inspected for visible signs
of chemical attack. Subsequent tests for cathodic disbonding in accordance with Test Method G8, or penetration under load in
accordance with Test Method G17, may be applied to determine if the specimens have undergone any loss of mechanical or
bonding properties.
4. Significance and Use
4.1 The data obtained for short-term tests are of interest only in eliminating the most unsuitable materials or for indicating a
probable order of resistance in any particular media.
4.2 Test conditions should take into account the manner and duration of immersion, the reagent, the temperature of the system,
the area exposed above and below the liquid level, and other performance factors selected for the particular test.
5. Apparatus
5.1 Thickness Gage, capable of measuring the coating thickness in the manner prescribed by Test Method G12.
5.2 Test Container—A transparent closed container, sized to completely encase the pipe specimen and large enough to provide
adequate exposure to both the liquid and vapor states of reagent.
This test method is under the jurisdiction of ASTM Committee D01 on Paint and Related Coatings, Materials, and Applications and is the direct responsibility of
Subcommittee D01.48 on Durability of Pipeline Coating and Linings.
Current edition approved Dec. 1, 2010Dec. 1, 2015. Published December 2010December 2015. Originally approved in 1971. Last previous edition approved in 20022010
as G20 – 88 (2002).G20 – 10. DOI: 10.1520/G0020-10.10.1520/G0020-10R15.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
The last approved version of this historical standard is referenced on www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
G20 − 10 (2015)
NOTE 1—For example, a 2-L (2.0-qt) capacity, Mason-type jar with a 70-mm (2.75-in.) diameter neck has been found suitable for use with 2 in. pipe
and is illustrated in Fig. 1.
5.2.1 To avoid pressure build-up within the test containers, the threaded cup shall be replaced with a solid-rubber stopper. A
positive venting device, such as a water seal, shall be used when testing with volatile solvents at elevated temperatures.
5.2.2 A separate container shall be used for each test specimen.
5.3 Oven or Constant-Temperature Room or Bath—To ensure uniformity of test results, the test cells and specimen shall be
maintained at the test temperature 65°C (9°F) over the duration of the test period.
5.4 Auxiliary Testing Devices—Supplemental equipment used to determine specific mechanical properties of specimens before
and after immersion shall conform to the requirements prescribed in the applicable ASTM test method.
6. Reagents
6.1 The reagents selected for coating-resistance tests should be those anticipated to occur in the environment or in the product
being carried in the pipeline at the temperatures and in the concentrations expected. The numbers in parentheses refer to the list
of standard reagents given in Section 4 of Practices D543.
6.1.1 Acetic Acid (5 %) (4.4.2).
6.1.2 Acetone (4.4.3).
6.1.3 Carbon Disulfide.
6.1.4 Gasoline.
6.1.5 Hydrochloric Acid (10 %) (4.4.23).
6.1.6 Kerosine (4.4.28).
6.1.7 Lime Water, Saturated.
6.1.8 Methyl Alcohol (4.4.29).
6.1.9 Methyl Ethyl Ketone.
6.1.10 Nitric Acid (10 %) (4.4.33).
6.1.11 Sodium Carbonate Solution (20 %) (4.4.38).
6.1.12 Sodium Chloride Solution (10 %) (4.4.40).
6.1.13 Sodium Hydroxide Solution (10 %) (4.4.42).
6.1.14 Sulfuric Acid (30 %) (4.4.46).
6.1.15 Toluene (4.4.48).
6.1.16 Transformer Oil (4.4.49).
6.1.17 Trichlorethylene.
6.1.18 Other selected environments.
7. Hazards
7.1 Take safety precautions to avoid personal contact, to elimin
...