ASTM G14-04(2010)e1

Standard Test Method for Impact Resistance of Pipeline Coatings (Falling Weight Test)

SIGNIFICANCE AND USE
4.1 The ability of a pipe coating to resist mechanical damage during shipping, handling, and installation will depend upon its impact resistance. This test method provides a systematic means for screening coating materials with regard to this property.
SCOPE
1.1 This test method covers the determination of the energy required to rupture coatings applied to pipe under specified conditions of impact from a falling weight.  
1.2 The values stated in SI units to three significant decimals 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-2010
• 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

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
´1
Designation: G14 − 04 (Reapproved 2010)
Standard Test Method for
Impact Resistance of Pipeline Coatings (Falling Weight
Test)
This standard is issued under the fixed designation G14; 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.
ε NOTE—Equation in Table X2.1 was corrected editorially in November 2012.
1. Scope energies over the required range. Electrical inspection is used
to detect resultant breaks in the coating. Impact resistance is
1.1 This test method covers the determination of the energy
determined as the amount of energy required to cause penetra-
required to rupture coatings applied to pipe under specified
tion of the coating film.
conditions of impact from a falling weight.
1.2 The values stated in SI units to three significant deci-
4. Significance and Use
mals are to be regarded as the standard. The values given in
4.1 The ability of a pipe coating to resist mechanical
parentheses are for information only.
damage during shipping, handling, and installation will depend
1.3 This standard does not purport to address all of the
upon its impact resistance. This test method provides a
safety concerns, if any, associated with its use. It is the
systematic means for screening coating materials with regard
responsibility of the user of this standard to establish appro-
to this property.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
5. Apparatus
2. Referenced Documents
5.1 This test method can be successfully used with impact
2.1 ASTM Standards:
apparatus conforming to the following specifications:
G12 Test Method for Nondestructive Measurement of Film
5.1.1 Tup—The tup shall be made up from a tup body and a
Thickness of Pipeline Coatings on Steel (Withdrawn
tup nose having a combined, fixed weight of 1.361 kg (3.00 lb)
2013)
and shall be used over a drop range of 0.61 to 1.22 m (2 to 4
G62 Test Methods for Holiday Detection in Pipeline Coat-
ft). With most coatings, a 1.361-kg (3.00-lb) tup dropped
ings
through a distance of 914 mm (3 ft) yields suitable results. The
2.2 SAE Standard: 5
tup nose shall have a 15.875-mm ( ⁄8-in.) hemispherical head.
Grade 52100 Steel
NOTE 1—Frequent replacement of the tup nose can be avoided if it is
cut from steel capable of being hardened to a hardness of Rockwell C/45
3. Summary of Test Method
while retaining an impact toughness of at least 15 ft·lb (20.34 J). Ball
3.1 This test method uses a falling fixed weight having a
bearings conforming to SAE Grade 52100 have also been found suitable
specified diameter impact surface, tup, which is restrained
for this purpose.
vertically and dropped from varying heights to produce impact
5.1.2 Drop Tube—Atube 1.52 m (5 ft) long shall be used to
containthetupandguideitduringfreefall.Thedroptubeshall
be constructed of steel, aluminum, or any other suitably rigid
This test method is under the jurisdiction of ASTM Committee D01 on Paint
and Related Coatings, Materials, andApplications and is the direct responsibility of
material and internally sized to provide a minimum of friction
Subcommittee D01.48 on Durability of Pipeline Coating and Linings.
to the falling tup. A scale shall be attached for measuring the
Current edition approved Dec. 1, 2010. Published December 2010. Originally
height of drop to the nearest 2.54 mm (0.10 in.).
approved in 1969. Last previous edition approved in 2004 as G14 – 04. DOI:
10.1520/G0014-04R10E01.
5.1.3 Specimen Holder—The base plate of the apparatus
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
shall include a device for positioning and holding the pipe
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
specimen on line with the axis of the vertical drop tube.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
NOTE 2—An arrangement using a V-notch vise made of metal with
The last approved version of this historical standard is referenced on
springclampisrecommendedforthispurpose.Glancingblows,causedby
www.astm.org.
Available from SAE International (SAE), 400 Commonwealth Dr.,Warrendale, an out-of-plumb condition between drop tube and pipe sample, will cause
PA 15096-0001, http://www.sae.org. erratic test results.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
´1
G14 − 04 (2010)
5.1.4 Apparatus Support—Both the apparatus and sample 9.2 Begin testing from the approximate height determined
shall be firmly supported and secured to a rigid base to in 8.2 and corresponding to the point at which the first
optimize energy transfer from the tup to the specimen. nonfailure was registered. Maintain a fixed increment between
adjacent testing heights.
5.2 A design for the test apparatus appears in Figs. X1.1-
X1.3 of Appendix X1. 9.3 Useasuitabledetector,asspecifiedinTestMethodG62,
to determine penetration or lack thereof of the coating after
5.3 Thickness Gage—Measurements of coating thickness
each individual impact.
will be required for this test, and shall be done in accordance
with Test Method G12. 9.4 If the coating film is penetrated on the initial drop, make
the next test at the next lower height increment. If the first
5.4 Holiday Detector—A suitable detector as specified in
specimen does not fail, make the second test at the next higher
Test Methods G62 shall be used to locate breaks in the coating
increment.
film.
9.5 In a similar manner, determine the height of fall by the
6. Test Specimen
performance of the coating on each preceding drop. Maintain a
constant height increment between readings. Continue to apply
6.1 The test specimen shall be a 406.4 mm (16 in.) long
this “up-and-down” method until 20 successive impact read-
piece of Schedule 40, 60.325 mm (2.375 in.) outside diameter
ings have been made.
coated pipe prepared with its surface preparation and coating
procedures equivalent to that of production coated pipe.
10. Calculation
6.2 Seven specimens shall be required for the test.
10.1 Calculate the mean value of impact strength, m,in
g/cm (or in./lb) as follows:
7. Conditioning
A 1
7.1 The specimen shall be exposed to a room temperature of
m 5 h 1d 6 3W (1)
F G
S D
N 2
21 to 25°C (70 to 77°F) for a period of 24 h before beginning
the test.
where:
h = minimum height at which the less frequent event
8. Preliminary Measurements
occurs, cm (or in.),
8.1 Measure the applied coating thickness of each specimen
d = increment in height of drop, cm (or in.),
in accordance with Test Method G12.
A = sum of the frequency of occurrence at each height
increment times the number of
...