ASTM D3917-96(2002)e1

Standard Specification for Dimensional Tolerance of Thermosetting Glass-Reinforced Plastic Pultruded Shapes

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 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 closer than associated with "standard" shapes.
1.4 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—There is no similar or equivalent ISO standard.

General Information

• Status: Historical
• Publication Date: 09-Nov-1996
• ICS: 83.140.20 - Laminated sheets
• Technical Committee: D20 - Plastics
• Drafting Committee: D20.18 - Reinforced Thermosetting Plastics

Relations

• Replaces: ASTM D3917-96 - Standard Specification for Dimensional Tolerance of Thermosetting Glass-Reinforced Plastic Pultruded Shapes
• Effective Date: 10-Nov-1996
• Replaced By: ASTM D3917-08 - Standard Specification for Dimensional Tolerance of Thermosetting Glass-Reinforced Plastic Pultruded Shapes
• Effective Date: 01-Mar-2008
• Referred By: ASTM D7745-19 - Standard Practice for Testing Pultruded Composites
• Effective Date: 10-Nov-1996
• Referred By: ASTM D4385-19 - Standard Practice for Classifying Visual Defects in Thermosetting Reinforced Plastic Pultruded Products
• Effective Date: 10-Nov-1996
• Referred By: ASTM F1092-19 - Standard Specification for Fiberglass (GRP) Pultruded Open-Weather Storm and Guard, Square Railing Systems
• Effective Date: 10-Nov-1996

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
e1
Designation: D 3917 – 96 (Reapproved 2002)
Standard Specification for
Dimensional Tolerance of Thermosetting Glass-Reinforced
Plastic Pultruded Shapes
This standard is issued under the fixed designation D 3917; 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—Editorially revised 1.3 and 2.1.5 in March 2002.
1. Scope * 2.1.5 mean wall thickness—the average of two or more wall
thickness measurements.
1.1 This specification defines tolerances applicable to stan-
2.1.6 straightness—the perpendicular deviation of the sur-
dard rods, bars, and shapes pultruded from thermosetting
face contacting a horizontal plane.
glass-reinforced plastics.
2.1.7 web bow—the deviation where the web of the section
1.2 These dimensional tolerances apply to all shapes speci-
contacts the horizontal plane.
fied as “standard” by the pultrusion industry.
2.1.8 web camber—the deviation from the web surface to
1.3 Custom shapes and products designed for special appli-
the reference straight line.
cations shall carry specific tolerances that may vary from the
2.1.9 web-flange camber—the deviation from the free edge
standard because a change in type or amount of reinforcement
of the flange to the reference straight line.
used in a composite directly affects dimensions. The tolerances
maybewiderortighterthanassociatedwith“standard”shapes.
3. Dimensional Criteria
1.4 The following safety hazards caveat pertains only to the
3.1 Dimensional tolerances for cross sections shall be pre-
test methods portion, Section 4, of this specification: This
scribed in Table 1.
standard does not purport to address all of the safety concerns,
3.2 Width/diameter for solid rods and bars and length
if any, associated with its use. It is the responsibility of the user
tolerances for standard rods, bars, and shapes shall be as
of this standard to establish appropriate safety and health
prescribed in Table 2.
practices and determine the applicability of regulatory limita-
3.3 Straightness tolerances shall be as prescribed in Table 3
tions prior to use.
(also see 4.2).
NOTE 1—There is no similar or equivalent ISO standard.
3.4 Twist tolerances for bars and shapes shall be as pre-
scribed in Table 4 (also see 4.3).
2. Terminology
3.5 Flatness (flat surface) tolerances for bars, solid shapes,
2.1 Definitions:
and semihollow shapes shall be as prescribed in Table 5.
2.1.1 Class 1 hollow shape—one whose void is round and 1
3.6 Flatness (flat surface) tolerances of hollow shapes shall
in. (25 mm) or more in diameter and whose weight is equally
be as prescribed in Table 6.
distributed on opposite sides of two or more equally spaced
3.7 Angularity tolerances for bars and shapes shall be as
axes.
prescribed in Table 7 (also see 4.4).
2.1.2 envelope diameter—the diameter of the smallest circle
3.8 Camber tolerances for shapes shall be as prescribed in
that will completely enclose the cross section of the pultruded
Table 8 (also see 4.5).
product.
3.9 The selection, type, and amount of reinforcements, as
2.1.3 flange bow—the deviation where the flange of the
well as resin system used, directly affect dimensions. Toler-
section contacts the horizontal plane.
ances shall be agreed upon between the supplier and the user.
2.1.4 flange camber—the deviation from the flange surface
to the reference straight line.
4. Test Methods
4.1 Obtain the specified tolerances with conventional mea-
suring equipment. Measuring procedures, gages, and fixtures
This specification is under the jurisdiction of ASTM Committee D20 on
shall be agreed upon between the supplier and the user.
Plastics and is the direct responsibility of Subcommittee D20.18 on Reinforced
Thermosetting Plastics.
Current edition approved November 10, 1996. Published May 1997. Originally
published as D 3917 – 80. Last previous edition D 3917 – 94.
*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.
D 3917
TABLE 1 Cross-Sectional Dimensions—Standard Rods, Bars, and Shapes
Standard Pultruded Section with Envelope Dimension up to 10-in. (254-mm) Diameter
A,B
Solid Dimensions, 6in. (mm)
A B C
Parallel to the Layered Perpendicular to the Wall Thickness Completely
Specified Dimension, in. (mm)
Construction (Perpendicular Layered Construction Enclosing Space 0.11 in.
to Roving in all (Mat and Mat-roving (0.64 cm ) and Over
C,D E,F,G
Products) Products Only) (Eccentricity)
Up to 0.124 (3.15) incl 0.006 (0.15) 0.013 (0.33) 620 % of specified dimension
0.125 to 0.249 (3.18 to 6.32) incl 0.007 (0.18) 0.018 (0.46) but not exceeding either
0.250 to 0.499 (6.35 to 12.67) incl 0.008 (0.20) 0.027 (0.69) 60.100 (2.54) max or
0.500 to 0.749 (12.70 to 19.02) incl 0.009 (0.23) 0.038 (0.97) 60.010 (0.25) min
0.750 to 0.999 (19.05 to 25.37) incl 0.010 (0.25) 0.034 (0.86)
1.000 to 1.499 (25.40 to 38.07) incl 0.012 (0.30) . 620 % of specified dimension
1.500 to 1.999 (38.10 to 50.77) incl 0.014 (0.36) . but not exceeding either
2.000 to 3.999 (50.80 to 101.57) incl 0.024 (0.61) . 60.100 (2.54) max or
4.000 to 5.999 (101.60 to 152.37) incl 0.034 (0.86) . 60.010 (0.25) min
A
The tolerances applicable to a dimension composed of two or more component dimensions is the sum of the tolerances of the component dimensions if all of the
component dimensions are indicated.
B
Allowable deviation from specified dimension where 75 % or more of the dimension is composite.
C
At points less than 0.250 in. (6.35 mm) from base of leg, the tolerances of Dimension A are applicable.
D
When more than 25 % of the specified dimension is space, the tolerances shall be agreed upon between the purchaser and the supplier at the time the contractor
order is entered.
E
For hollow or semihollow shapes, when the nominal thickness of one wall is three times or greater than that of the opposite wall, the wall thickness tolerance shall
be agreed upon between the purchaser and the supplier at the time the contract or order is entered.
F
Where dimensions specified are outside and inside, rather than wall thickness itself, the allowable deviation (eccentricity) given in Column C applies to mean wall
thickness.
G 2 2
Tolerances in Column C take precedence over A dimension tolerances for walls which completely enclose 0.11 in. (0.64 cm ) and over.
TABLE 2 Length—Standard Rods, Bars, and Shapes
Specified Diameter (Rods)
Specified Width (Bars) Allowable Deviation from Specified Length, +in. (+mm), except as noted
Envelope Diameter (Shapes)
Over 12 to 30 ft (3.65 Over 30 to 50 ft (9.14
Up to 12 ft (3.65 m)
in. (mm) to 9.14 m) in Length, to 15.24 m) in Length,
in Length, incl
incl incl
1 1 3
Up to
...