ASTM G10-10(2015)
(Test Method)Standard Test Method for Specific Bendability of Pipeline Coatings
Standard Test Method for Specific Bendability of Pipeline Coatings
SIGNIFICANCE AND USE
4.1 This test will provide information on the ability of coatings applied to pipe to resist cracking, disbonding, or other mechanical damage as a result of bending. Because the test is applied to coated pipe from commercial production, the results can be directly used in the selection of similar materials for service. The test also has application as a quality control method when variations in coating application or material formulation will affect bending performance.
SCOPE
1.1 This method covers the specific determination of the effect of short-radius bends on coatings applied to 33.4-mm (1-in. nominal) diameter pipe.
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.
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Designation:G10 −10 (Reapproved 2015)
Standard Test Method for
Specific Bendability of Pipeline Coatings
This standard is issued under the fixed designation G10; 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 applied to coated pipe from commercial production, the results
can be directly used in the selection of similar materials for
1.1 This method covers the specific determination of the
service. The test also has application as a quality control
effect of short-radius bends on coatings applied to 33.4-mm
method when variations in coating application or material
(1-in. nominal) diameter pipe.
formulation will affect bending performance.
1.2 The values stated in SI units to three significant deci-
mals are to be regarded as the standard. The values given in
5. Apparatus
parentheses are for information only.
5.1 The bending apparatus shall be essentially as shown in
1.3 This standard does not purport to address all of the
Figs. 1-3 and shall include the following:
safety concerns, if any, associated with its use. It is the
5.1.1 Variable-Radius Mandrel, constructed from four
responsibility of the user of this standard to establish appro-
19-mm (0.75-in.) thick pieces of plywood, bolted together and
priate safety and health practices and determine the applica-
conforming to the geometric shape shown in Fig. 1. The
bility of regulatory limitations prior to use.
geometricconstructionisaccomplishedbylayingoutalongthe
outer edge of the mandrel a series of seven consecutive arcs at
2. Referenced Documents
decreasing radii of 610, 530, 460, 380, 300, and 230 mm (24,
2.1 ASTM Standards:
21, 18, 15, 12, and 9 in.). The first five arcs shall be carried
G6 Test Method for Abrasion Resistance of Pipeline Coat-
through a 45-deg angle to the next point of tangency.A45-deg
ings
V-notchshallbecutintotheedgeofthemandrelforseatingthe
G12 Test Method for Nondestructive Measurement of Film
pipespecimen.Holesshallbedrilledatappropriatelocationsin
Thickness of Pipeline Coatings on Steel (Withdrawn
the mandrel face for positioning the lever arm and fastening
2013)
pipe clamps.
5.1.2 Lever Arm-Roller Assembly—A 1.83-m (72-in.) lever
3. Summary of Method
arm with nylon roller supplies the mechanical advantage
3.1 The method consists of bending a 33.4-mm (1-in.
necessary to bend the pipe specimen. The lever arm shall
nominal) diameter specimen of coated pipe around a mandrel
contain a series of holes which are used to maintain proper
to produce a range of short-radius bends. Coating failure in the
clearance between the roller and pipe sample during the
form of cracking or loss of adhesion is detected through visual
bending operation.
and electrical inspection of the bent specimen.
5.2 Thickness Gage—Measurements of coating thickness
will be required for this test. This shall be done in accordance
4. Significance and Use
with Test Method G12.
4.1 This test will provide information on the ability of
5.3 Holiday Detector—A low-voltage d-c holiday detector
coatings applied to pipe to resist cracking, disbonding, or other
of the wet-sponge type, specified in Test Method G6, shall be
mechanical damage as a result of bending. Because the test is
used to locate breaks in the coating film.
This test method is under the jurisdiction of ASTM Committee D01 on Paint
6. Test Specimens
and Related Coatings, Materials, andApplications and is the direct responsibility of
6.1 The test specimen should be 2.5 m (100 in.) in length. It
Subcommittee D01.48 on Durability of Pipeline Coating and Linings.
Current edition approved Dec. 1, 2015. Published December 2015. Originally
should be representative of production-coated pipe and be free
approved in 1969. Last previous edition approved in 2010 as G10 – 10. DOI:
ofobviouscoatingflawsordefects.Coatingspecimensshallbe
10.1520/G0010-10R15.
applied to 33.4-mm (1-in. nominal) diameter pipe.
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
Standards volume information, refer to the standard’s Document Summary page on 7. Conditioning
the ASTM website.
7.1 The specimen shall be exposed to room temperature for
The last approved version of this historical standard is referenced on
www.astm.org. a sufficient time to ensure thermal equilibrium in the pipe and
Copyright © ASTM Inte
...
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: G10 − 10 G10 − 10 (Reapproved 2015)
Standard Test Method for
Specific Bendability of Pipeline Coatings
This standard is issued under the fixed designation G10; 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 method covers the specific determination of the effect of short-radius bends on coatings applied to 33.4-mm (1-in.
nominal) diameter pipe.
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.
2. Referenced Documents
2.1 ASTM Standards:
G6 Test Method for Abrasion Resistance of Pipeline Coatings
G12 Test Method for Nondestructive Measurement of Film Thickness of Pipeline Coatings on Steel (Withdrawn 2013)
3. Summary of Method
3.1 The method consists of bending a 33.4-mm (1-in. nominal) diameter specimen of coated pipe around a mandrel to produce
a range of short-radius bends. Coating failure in the form of cracking or loss of adhesion is detected through visual and electrical
inspection of the bent specimen.
4. Significance and Use
4.1 This test will provide information on the ability of coatings applied to pipe to resist cracking, disbonding, or other
mechanical damage as a result of bending. Because the test is applied to coated pipe from commercial production, the results can
be directly used in the selection of similar materials for service. The test also has application as a quality control method when
variations in coating application or material formulation will affect bending performance.
5. Apparatus
5.1 The bending apparatus shall be essentially as shown in Figs. 1-3 and shall include the following:
5.1.1 Variable-Radius Mandrel, constructed from four 19-mm (0.75-in.) thick pieces of plywood, bolted together and
conforming to the geometric shape shown in Fig. 1. The geometric construction is accomplished by laying out along the outer edge
of the mandrel a series of seven consecutive arcs at decreasing radii of 610, 530, 460, 380, 300, and 230 mm (24, 21, 18, 15, 12,
and 9 in.). The first five arcs shall be carried through a 45-deg angle to the next point of tangency. A 45-deg V-notch shall be cut
into the edge of the mandrel for seating the pipe specimen. Holes shall be drilled at appropriate locations in the mandrel face for
positioning the lever arm and fastening pipe clamps.
5.1.2 Lever Arm-Roller Assembly—A 1.83-m (72-in.) lever arm with nylon roller supplies the mechanical advantage necessary
to bend the pipe specimen. The lever arm shall contain a series of holes which are used to maintain proper clearance between the
roller and pipe sample during the bending operation.
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 1969. Last previous edition approved in 20022010
as G10 – 83 (2002).G10 – 10. DOI: 10.1520/G0010-10.10.1520/G0010-10R15.
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 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
G10 − 10 (2015)
FIG. 1 Variable-Radius Mandrel
FIG. 2 Details of Mandrel Assembly and Support Brackets
5.2 Thickness Gage—Measurements of coating thickness will be required for this test. This shall be done in accordance with
Test Method G12.
5.3 Holiday Detector—A low-voltage d-c holiday detector of the wet-sponge type, specified in Test Method G6, shall be used
to locate breaks in the coating film.
6. Test Specimens
...
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