ASTM G17-07(2020)

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: G17 − 07 (Reapproved 2020)
Standard Test Method for
Penetration Resistance of Pipeline Coatings (Blunt Rod)
This standard is issued under the fixed designation G17; 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 coating is not penetrated. Deformation cannot be compared to
penetration into and through a coating.
1.1 This accelerated test method is used to determine the
relative resistance of steel pipeline coatings to penetration or
4. Apparatus
deformation by a blunt rod under a specified load. The test
4.1 Test apparatus shall consist of a dead weight tester that
method is intended to apply to the testing of all types of
can press the flat tip of a rod against the coated pipe. The
nonmetallic pipeline coatings subjected to various tempera-
flat-tipped end of the rod contacting the coating shall have a
tures.
diameter of 6.350 mm 6 0.0254 mm (0.250 in. 6 0.001 in.)
1.2 The values stated in SI units to three significant deci-
and together with supplementary weight and any other weight-
mals are to be regarded as the standard. The values given in
contributing parts shall have a total weight of 4.453 kg (9.817
parentheses are for information only.
lb), resulting in a unit pressure of 14.060 kg/cm (200 psi)
1.3 This standard does not purport to address all of the against the coating. Detailed design of the apparatus is shown
safety concerns, if any, associated with its use. It is the
in Figs. 1-6 and Tables 1-4 show dimensions.
responsibility of the user of this standard to establish appro-
4.2 Depth Gage, a device capable of measuring the penetra-
priate safety, health, and environmental practices and deter-
tion movement of the rod accurately to 0.0254 mm (0.001 in.).
mine the applicability of regulatory limitations prior to use.
4.3 Temperature Chamber, a thermostatically controlled
1.4 This international standard was developed in accor-
enclosure to provide heating and cooling of the specimen and
dance with internationally recognized principles on standard-
test apparatus (excluding depth gage) to within 62°C (3.6°F)
ization established in the Decision on Principles for the
of the desired test temperature. This equipment is optional
Development of International Standards, Guides and Recom-
when the test can be run within 62°C (3.6°F) of the desired
mendations issued by the World Trade Organization Technical
test temperature without its use.
Barriers to Trade (TBT) Committee.
4.4 Temperature Controlled Box, to fully enclose the test
2. Summary of Test Method
apparatus except the indicating means of the depth gage, as
2.1 The depth or rate of penetration or deformation that is
optional equipment in cases where a test is to be run at a
caused by a weighted blunt rod to a coating system applied to temperature higher than room temperature. The enclosure shall
steel pipe is measured over a period of time with a micrometer
be thermostatically controlled, capable of maintaining the
depth gage. Three consecutive identical readings taken at temperature to within 62°C (3.6°F) of the test temperature,
specified intervals conclude the test.
which normally will be in the range of 23 to 76.6°C (73.4 to
170°F).
3. Significance and Use
4.5 Thermometer, a temperature measurement device accu-
3.1 Since pipeline coatings are subjected to concentrated
rate to 60.5°C (61°F).
pressuresexertedbytheweightofthepipeandthebackfill,this
test is intended primarily for determining the resistance of the 5. Test Specimens
coating to penetration or deformation under controlled condi-
5.1 The test specimens shall be 150 mm (6 in.) long and
tions.
prepared with its surface preparation and coating procedures
3.1.1 Deformation of a compressible coating does not sig-
equivalent to that of production coated pipe. Duplicate tests
nify a potential weakness in underground burial service, if the
shall be run.
6. Conditioning
This test method is under the jurisdiction of ASTM Committee D01 on Paint
and Related Coatings, Materials, andApplications and is the direct responsibility of
6.1 The specimen shall be exposed to the test temperature
Subcommittee D01.48 on Durability of Pipeline Coating and Linings.
for a period of 24 h before beginning the test. If the test
Current edition approved Aug. 1, 2020. Published August 2020. Originally
temperature is the same as room temperature, it shall be 21 to
approved in 1971. Last previous edition approved in 2013 as G17 – 07 (2013). DOI:
10.1520/G0017-07R20. 25°C (70 to 77°F).
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
G17 − 07 (2020)
C 5 M 2 M (1)
N F I
C 5 ~C /T! 3100
P N
where:
C = net change,
N
M = final measurement,
F
M = initial measurement,
I
C = percent change, and
P
T = film thickness.
9. Report
9.1 The report shall include the following:
9.1.1 Complete identification
...