ASTM D3917-15
(Specification)Standard Specification for Dimensional Tolerance of Thermosetting Glass-Reinforced Plastic Pultruded Shapes
Standard Specification for Dimensional Tolerance of Thermosetting Glass-Reinforced Plastic Pultruded Shapes
ABSTRACT
This specification defines the dimensional tolerances of standard rods, bars, and shapes pultruded from thermosetting glass-reinforced plastics. Tolerances cover dimensional criteria for cross sections, width or diameter, straightness, twist, surface flatness, angularity, and camber.
SCOPE
1.1 This specification defines production tolerances applicable to standard rods, bars, shapes, and flat sheet pultruded from thermosetting glass-reinforced plastics.
1.2 These dimensional tolerances apply to all shapes specified as “standard” by the pultrusion industry.
1.3 Custom shapes and products designed for special applications may carry specific tolerances that vary from the standard.
1.4 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.5 The following safety hazards caveat pertains only to the test methods portion, Section 4, of this specification: 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.
Note 1: There is no known ISO equivalent to this standard.
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Designation:D3917 −15
StandardSpecification for
Dimensional Tolerance of Thermosetting Glass-Reinforced
1
Plastic Pultruded Shapes
This standard is issued under the fixed designation D3917; 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* 3. Dimensional Criteria
1.1 This specification defines production tolerances appli- 3.1 Cross-sectional dimensions for standard rods, bars, and
cable to standard rods, bars, shapes, and flat sheet pultruded shapes shall be prescribed in Table 1.
from thermosetting glass-reinforced plastics.
3.2 Length tolerances for standard rods, bars, and shapes
1.2 These dimensional tolerances apply to all shapes speci- shall be as prescribed in Table 2.
fied as “standard” by the pultrusion industry.
3.3 Straightness tolerances shall be as prescribed in Table 3
1.3 Custom shapes and products designed for special appli- (also see 4.2).
cations may carry specific tolerances that vary from the
3.4 Twist tolerances for bars and shapes shall be as pre-
standard.
scribed in Table 4 (also see 4.3).
1.4 The values stated in inch-pound units are to be regarded
3.5 Flatness (flat surface) tolerances for bars, solid shapes,
as standard. The values given in parentheses are mathematical
semihollow shapes, and flat sheet shall be as prescribed in
conversions to SI units that are provided for information only
Table 5.
and are not considered standard.
3.6 Flatness (flat surface) tolerances of hollow shapes shall
1.5 The following safety hazards caveat pertains only to the
be as prescribed in Table 6.
test methods portion, Section 4, of this specification: This
3.7 Angularity tolerances for bars and shapes shall be as
standard does not purport to address all of the safety concerns,
prescribed in Table 7 (also see 4.4).
if any, associated with its use. It is the responsibility of the user
of this standard to establish appropriate safety and health
3.8 Camber tolerances for shapes can be as prescribed in
practices and determine the applicability of regulatory limita-
Table 8, if required by the customer. Camber is not specified
tions prior to use.
for standard shapes but will be a special customer requirement.
NOTE 1—There is no known ISO equivalent to this standard.
3.9 The selection, type, and amount of reinforcements, as
well as resin system used, directly affect dimensions. Toler-
2. Terminology
ances shall be agreed upon between the supplier and the user.
2.1 Definitions:
3.10 Squareness of end cut for bars, solid shapes, semihol-
2.1.1 camber—the deviation of the edge or surface from a
low shapes, and flat sheet shall be as prescribed in Table 9.
reference straight line with the weight of the pultrusion not
minimizing the measurement.
4. Test Methods
2.1.2 flat sheet—a rectangular solid pultruded profile with a
4.1 Obtain the specified tolerances with conventional mea-
width of 12 in. up to and including 78 inches.
suring equipment. Measuring procedures, gages, and fixtures
2.1.3 mean wall thickness—the average of two or more wall
shall be agreed upon between the supplier and the user.
thickness measurements taken at multiple locations.
4.2 Measure departure from straightness by placing the
2.1.4 straightness—the upward deviation of a pultruded
section on a level table so that the arc or departure from
shape when resting on a flat surface measured in a manner that
straightness is vertical. Measure the vertical depth of the arc
the weight of the pultruded part minimizes the deviation.
with a feeler gauge, a straightedge, or both.
4.3 Measure twist by placing the pultruded section on a flat
1
This specification is under the jurisdiction of ASTM Committee D20 on
surface and using an inclinometer. An inclinometer is a
Plastics and is the direct responsibility of Subcommittee D20.18 on Reinforced
Thermosetting Plastics. commercially available device used to measure the angle of
Current edition approved April 1, 2015. Published April 2015. Originally
inclination.
approved in 1980. Last previous edition approved in 2012 as D3917 - 12. DOI:
10.1520/D3917-15. 4.4 Measure angles with protractors or gauges.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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D3917−15
5. Keywords
5.1 dimensional tolerance; pultruded shapes; thermosetting
plastic
TABLE 1 Cross-Sectional Dimensions—Standard Rods, Bars, and Shapes
NOTE 1—The minimum tolerances are applicable for thicknesses less than 0.05 in. (1.27 mm).
Solid Dimensions, ±in. (mm
...
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: D3917 − 12 D3917 − 15
Standard Specification for
Dimensional Tolerance of Thermosetting Glass-Reinforced
1
Plastic Pultruded Shapes
This standard is issued under the fixed designation D3917; 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 Scope*
1.1 This specification defines production tolerances applicable to standard rods, bars, shapes, and shapes flat sheet pultruded
from thermosetting glass-reinforced plastics.
1.2 These dimensional tolerances apply to all shapes specified as “standard” by the pultrusion industry.
1.3 Custom shapes and products designed for special applications may carry specific tolerances that vary from the standard.
1.4 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
1.5 The following safety hazards caveat pertains only to the test methods portion, Section 4, of this specification: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.
NOTE 1—There is no known ISO equivalent to this standard.
2. Terminology
2.1 Definitions:
2.1.1 camber—the deviation of the edge or surface from a reference straight line.line with the weight of the pultrusion not
minimizing the measurement.
2.1.2 flat sheet—a rectangular solid pultruded profile with a width of 12 in. up to and including 78 inches.
2.1.3 mean wall thickness—the average of two or more wall thickness measurements taken at multiple locations.
2.1.4 straightness—the upward deviation of a pultruded shape when resting on a flat surface measured in a manner that the
weight of the pultruded part minimizes the deviation.
2.1.4 unilateral tolerance—a tolerance in which the variation is permitted in one direction (either “+” or “-”) from the specified
dimension.
3. Dimensional Criteria
3.1 Dimensional tolerances for cross sections Cross-sectional dimensions for standard rods, bars, and shapes shall be prescribed
in Table 1.
3.2 Length tolerances for standard rods, bars, and shapes shall be as prescribed in Table 2.
3.3 Straightness tolerances shall be as prescribed in Table 3 (also see 4.2).
3.4 Twist tolerances for bars and shapes shall be as prescribed in Table 4 (also see 4.3).
3.5 Flatness (flat surface) tolerances for bars, solid shapes, and semihollow shapessemihollow shapes, and flat sheet shall be as
prescribed in Table 5.
3.6 Flatness (flat surface) tolerances of hollow shapes shall be as prescribed in Table 6.
3.7 Angularity tolerances for bars and shapes shall be as prescribed in Table 7 (also see 4.4).
1
This specification is under the jurisdiction of ASTM Committee D20 on Plastics and is the direct responsibility of Subcommittee D20.18 on Reinforced Thermosetting
Plastics.
Current edition approved April 1, 2012April 1, 2015. Published May 2012April 2015. Originally approved in 1980. Last previous edition approved in 20112012 as
D3917 - 11.D3917 - 12. DOI: 10.1520/D3917-12.10.1520/D3917-15.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D3917 − 15
3.8 Camber tolerances for shapes can be as prescribed in Table 8, if required by the customer. Camber is not specified for
standard shapes but will be a special customer requirement.
3.9 The selection, type, and amount of reinforcements, as well as resin system used, directly affect dimensions. Tolerances shall
be agreed upon between the supplier and the user.
3.10 Squareness of end cut for bars, solid shapes, semihollow shapes, and flat sheet shall be as prescribed in Table 9.
4. Test Methods
4.1 Obtain the specified tolerances with conventional measuring equipment. Measuring procedures, gages, and fixtures shall be
agreed upon between the supplier and the user.
4.2 Measure departure from straightness by placing the section on a level table so that the arc or departure from straightness
is vertical. Measure the vertical depth of
...
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