ASTM D3917-11
(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 tolerances applicable to standard rods, bars, and shapes 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.
General Information
Relations
Buy Standard
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
Designation: D3917 – 11
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 3. Dimensional Criteria
1.1 This specification defines tolerances applicable to stan- 3.1 Dimensional tolerances for cross sections shall be pre-
dard rods, bars, and shapes pultruded from thermosetting scribed in Table 1.
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 and semihollow shapes shall be as prescribed in Table 5.
conversions to SI units that are provided for information only 3.6 Flatness (flat surface) tolerances of hollow shapes shall
and are not considered standard. be as prescribed in Table 6.
1.5 The following safety hazards caveat pertains only to the 3.7 Angularity tolerances for bars and shapes shall be as
test methods portion, Section 4, of this specification: This prescribed in Table 7 (also see 4.4).
standard does not purport to address all of the safety concerns, 3.8 Camber tolerances for shapes can be as prescribed in
if any, associated with its use. It is the responsibility of the user Table 8, if required by the customer. Camber is not specified
of this standard to establish appropriate safety and health for standard shapes but will be a special customer requirement.
practices and determine the applicability of regulatory limita- 3.9 The selection, type, and amount of reinforcements, as
tions prior to use. well as resin system used, directly affect dimensions. Toler-
ances shall be agreed upon between the supplier and the user.
NOTE 1—There is no known ISO equivalent to this standard.
4. Test Methods
2. Terminology
4.1 Obtain the specified tolerances with conventional mea-
2.1 Definitions:
suring equipment. Measuring procedures, gages, and fixtures
2.1.1 camber—the deviation of the edge or surface from a
shall be agreed upon between the supplier and the user.
reference straight line.
4.2 Measure departure from straightness by placing the
2.1.2 mean wall thickness—the average of two or more wall
section on a level table so that the arc or departure from
thickness measurements taken at multiple locations.
straightness is vertical. Measure the vertical depth of the arc
2.1.3 straightness—the upward deviation of a pultruded
with a feeler gauge, a straightedge, or both.
shape when resting on a flat surface measured in a manner that
4.3 Measure twist by placing the pultruded section on a flat
the weight of the pultruded part minimizes the deviation.
surface and using an inclinometer. An inclinometer is a
2.1.4 unilateral tolerance—a tolerance in which the varia-
commercially available device used to measure the angle of
tion is permitted in one direction (either “+” or “-”) from the
inclination.
specified dimension.
4.4 Measure angles with protractors or gauges.
1 5. Keywords
This specification is under the jurisdiction of ASTM Committee D20 on
Plastics and is the direct responsibility of Subcommittee D20.18 on Reinforced
5.1 dimensional tolerance; pultruded shapes; thermosetting
Thermosetting Plastics.
plastic
Current edition approved April 1, 2011. Published April 2011. Originally
approved in 1980. Last previous edition approved in 2008 as D3917 - 08. DOI:
10.1520/D3917-11.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
D3917 – 11
TABLE 1 Cross-Sectional Dimensions—Standard Rods, Bars, and Shapes
Standard Pultruded Section with Dimension up to 36-in. (914-mm) Diameter
A,A
Solid Dimensions, 6in. (mm)
A B C
Specified Dimension, in. (mm)
Die Struck Wall Thickness Wall Thickness
A
Dimension (open shape) (closed shape)
All 64% –10 % of specified –20 % of specified dimension, but not
(0.94 in. max) dimension, but not exceeding either
exceeding either –0.100 (2.54) max or
–0.100
...
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:D3917–08 Designation: D3917 – 11
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 *
1.1 This specification defines tolerances applicable to standard rods, bars, and shapes pultruded from thermosetting
glass-reinforced plastics.
1.2 These dimensional tolerances apply to all shapes specified as “standard” by the pultrusion industry.
1.3Custom shapes and products designed for special applications shall carry specific tolerances that may vary from the standard
because a change in type or amount of reinforcement used in a composite directly affects dimensions.The tolerances may be wider
or tighter than associated with “standard” shapes.
1.4
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.
NOTE1—There is no similar or equivalent ISO standard. 1—There is no known ISO equivalent to this standard.
2. Terminology
2.1 Definitions:
2.1.1 Class 1 hollow shape—one whose void is round and 1 in. (25 mm) or more in diameter and whose weight is equally
distributed on opposite sides of two or more equally spaced axes. camber—the deviation of the edge or surface from a reference
straight line.
2.1.2 envelope diameter—the diameter of the smallest circle that will completely enclose the cross section of the pultruded
product.
2.1.3flange bow—the deviation where the flange of the section contacts the horizontal plane.
2.1.4flange camber—the deviation from the flange surface to the reference straight line.
2.1.5mean wall thickness—the average of two or more wall thickness measurements.
2.1.6—the average of two or more wall thickness measurements taken at multiple locations.
2.1.3 straightness—the perpendicular deviation of the pultruded profile when resting on a flat surface.
2.1.7web bow—the deviation where the web of the section contacts the horizontal plane.
2.1.8web camber—the deviation from the web surface to the reference straight line.
2.1.9web-flange camber—the deviation from the free edge of the flange to the reference straight line. —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 shall be prescribed in Table 1.
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.
´1
Current edition approved March 1, 2008. Published March 2008. Originally approved in 1980. Last previous edition approved in 2002 as D3917-96(2002) . DOI:
10.1520/D3917-08.
Current edition approved April 1, 2011. Published April 2011. Originally approved in 1980. Last previous edition approved in 2008 as D3917 - 08. DOI:
10.1520/D3917-11.
*ASummary 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 – 11
TABLE 1 Cross-Sectional Dimensions—Standard Rods, Bars, and Shapes
Standard Pultruded Section with Envelope Dimension up to 10 36-in. (25914-mm) Diameter
A,BA
Solid Dimensions, 6in. (mm)
A B
C
ParallDiel Sto the Layereduck PerpendiculWar to tll
Wall Thickness Completely En
Specified Dimension, in. (mm)
Construct
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.