ASTM G10-83(1996)e1

Standard Test Method for Specific Bendability of Pipeline Coatings

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 This standard may involve hazardous operations and equipment. This standard does not purport to address all of the safety problems associated with its use. It is the responsibility of whoever uses this practice to consult and establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.  
1.3 The values stated in SI units to three significant decimals are to be regarded as the standard.

General Information

• Status: Historical
• Publication Date: 09-May-1996
• Technical Committee: D01 - Paint and Related Coatings, Materials, and Applications
• Drafting Committee: D01.48 - Durability of Pipeline Coating and Linings

Relations

• Replaced By: ASTM G10-83(2002) - Standard Test Method for Specific Bendability of Pipeline Coatings
• Effective Date: 27-May-1983
• Referred By: ASTM G11-19 - Standard Practice for Effects of Outdoor Weathering on Pipeline Coatings
• Effective Date: 10-May-1996

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
e1
Designation: G 10 – 83 (Reapproved 1996)
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Test Method for
Specific Bendability of Pipeline Coatings
This standard is issued under the fixed designation G 10; 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 (e) indicates an editorial change since the last revision or reapproval.
e NOTE—Keywords were added editorially in June 1996.
1. Scope 5. Apparatus
1.1 This method covers the specific determination of the 5.1 The bending apparatus shall be essentially as shown in
effect of short-radius bends on coatings applied to 33.4-mm Figs. 1-3 and shall include the following:
(1-in. nominal) diameter pipe. 5.1.1 Variable-Radius Mandrel, constructed from four
1.2 This standard does not purport to address all of the 19-mm (0.75-in.) thick pieces of plywood, bolted together and
safety concerns, if any, associated with its use. It is the conforming to the geometric shape shown in Fig. 1. The
responsibility of the user of this standard to establish appro- geometric construction is accomplished by laying out along the
priate safety and health practices and determine the applica- outer edge of the mandrel a series of seven consecutive arcs at
bility of regulatory limitations prior to use. decreasing radii of 610, 530, 460, 380, 300, and 230 mm (24,
1.3 The values stated in SI units to three significant deci- 21, 18, 15, 12, and 9 in.). The first five arcs shall be carried
mals are to be regarded as the standard. The values given in through a 45-deg angle to the next point of tangency. A 45-deg
parentheses are for information only. V-notch shall be cut into the edge of the mandrel for seating the
pipe specimen. Holes shall be drilled at appropriate locations in
2. Referenced Documents
the mandrel face for positioning the lever arm and fastening
2.1 ASTM Standards:
pipe clamps.
G 6 Test Method for Abrasion Resistance of Pipeline Coat- 5.1.2 Lever Arm-Roller Assembly—A 1.83-m (72-in.) lever
ings
arm with nylon roller supplies the mechanical advantage
G 12 Test Method for Nondestructive Measurement of Film necessary to bend the pipe specimen. The lever arm shall
Thickness of Pipeline Coatings on Steel
contain a series of holes which are used to maintain proper
clearance between the roller and pipe sample during the
3. Summary of Method
bending operation.
3.1 The method consists of bending a 33.4-mm (1-in.
5.2 Thickness Gage—Measurements of coating thickness
nominal) diameter specimen of coated pipe around a mandrel
will be required for this test. This shall be done in accordance
to produce a range of short-radius bends. Coating failure in the
with Test Method G 12.
form of cracking or loss of adhesion is detected through visual
5.3 Holiday Detector—A low-voltage d-c holiday detector
and electrical inspection of the bent specimen.
of the wet-sponge type, specified in Test Method G 6, shall be
used to locate breaks in the coating film.
4. Significance and Use
6. Test Specimens
4.1 This test will provide information on the ability of
coatings applied to pipe to resist cracking, disbonding, or other
6.1 The test specimen should be 2.5 m (100 in.) in length. It
mechanical damage as a result of bending. Because the test is
should be representative of production-coated pipe and be free
applied to coated pipe from commercial production, the results
of obvious coating flaws or defects. Coating specimens shall be
can be directly used in the selection of similar materials for
applied to 33.4-mm (1-in. nominal) diameter pipe.
service. The test also has application as a quality control
7. Conditioning
method when variations in coating application or material
formulation will affect bending performance.
7.1 The specimen shall be exposed to room temperature for
a sufficient time to ensure thermal equilibrium in the pipe and
coating. A temperature in the range from 20 to 30°C (68 to
This method is under the jurisdiction of ASTM Committee D-1 on Paint and
85°F) shall be considered room tempe
...