1、Designation: D3917 151Standard Specification forDimensional Tolerance of Thermosetting Glass-ReinforcedPlastic Pultruded Shapes1This standard is issued under the fixed designation D3917; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revisi
2、on, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1NOTEEditorial corrections were made in July 2015.1. Scope*1.1 This specification defines production tolerances ap
3、pli-cable to standard rods, bars, shapes, and flat sheet pultrudedfrom thermosetting glass-reinforced plastics.1.2 These dimensional tolerances apply to all shapes speci-fied as “standard” by the pultrusion industry.1.3 Custom shapes and products designed for special appli-cations may carry specific
4、 tolerances that vary from thestandard.1.4 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.5 The following safety hazards caveat pertai
5、ns only to thetest methods portion, Section 4, of this specification: Thisstandard does not purport to address all of the safety concerns,if any, associated with its use. It is the responsibility of the userof this standard to establish appropriate safety and healthpractices and determine the applic
6、ability of regulatory limita-tions prior to use.NOTE 1There is no known ISO equivalent to this standard.2. Terminology2.1 Definitions:2.1.1 camberthe deviation of the edge or surface from areference straight line with the weight of the pultrusion notminimizing the measurement.2.1.2 flat sheeta recta
7、ngular solid pultruded profile with awidth of 12 in. up to and including 78 inches.2.1.3 mean wall thicknessthe average of two or more wallthickness measurements taken at multiple locations.2.1.4 straightnessthe upward deviation of a pultrudedshape when resting on a flat surface measured in a manner
8、 thatthe weight of the pultruded part minimizes the deviation.3. Dimensional Criteria3.1 Cross-sectional dimensions for standard rods, bars, andshapes shall be prescribed in Table 1.3.2 Length tolerances for standard rods, bars, and shapesshall be as prescribed in Table 2.3.3 Straightness tolerances
9、 shall be as prescribed in Table 3(also see 4.2).3.4 Twist tolerances for bars and shapes shall be as pre-scribed in Table 4 (also see 4.3).3.5 Flatness (flat surface) tolerances for bars, solid shapes,semihollow shapes, and flat sheet shall be as prescribed inTable 5.3.6 Flatness (flat surface) tol
10、erances of hollow shapes shallbe as prescribed in Table 6.3.7 Angularity tolerances for bars and shapes shall be asprescribed in Table 7 (also see 4.4).3.8 Camber tolerances for shapes can be as prescribed inTable 8, if required by the customer. Camber is not specifiedfor standard shapes but will be
11、 a special customer requirement.3.9 The selection, type, and amount of reinforcements, aswell as resin system used, directly affect dimensions. Toler-ances shall be agreed upon between the supplier and the user.3.10 Squareness of end cut for bars, solid shapes, semihol-low shapes, and flat sheet sha
12、ll be as prescribed in Table 9.4. Test Methods4.1 Obtain the specified tolerances with conventional mea-suring equipment. Measuring procedures, gages, and fixturesshall be agreed upon between the supplier and the user.4.2 Measure departure from straightness by placing thesection on a level table so
13、that the arc or departure fromstraightness is vertical. Measure the vertical depth of the arcwith a feeler gauge, a straightedge, or both.1This specification is under the jurisdiction of ASTM Committee D20 onPlastics and is the direct responsibility of Subcommittee D20.18 on ReinforcedThermosetting
14、Plastics.Current edition approved April 1, 2015. Published April 2015. Originallyapproved in 1980. Last previous edition approved in 2012 as D3917 - 12. DOI:10.1520/D3917-15E01.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Bo
15、x C700, West Conshohocken, PA 19428-2959. United States14.3 Measure twist by placing the pultruded section on a flatsurface and using an inclinometer. An inclinometer is acommercially available device used to measure the angle ofinclination.4.4 Measure angles with protractors or gauges.5. Keywords5.
16、1 dimensional tolerance; pultruded shapes; thermosettingplasticTABLE 1 Cross-Sectional DimensionsStandard Rods, Bars, and ShapesNOTE 1The minimum tolerances are applicable for thicknesses less than 0.05 in. (1.27 mm).Solid Dimensions, in. (mm)ADie StruckDimensionA, BBWall ThicknessB(Open Shape)BThic
17、kness (Flat Sheets)CWall ThicknessB(Closed Shape)Thickness0.125 (3.175) and underThicknessover 0.125 (3.175)4 %0.094 (2.39) max10 %0.010 (0.25) min15 %0.010 (0.25) min10 %0.050 (1.27) max20 %0.010 (0.25) minAThe outside dimension of a part.BStandard pultruded section with dimension up to 36-in. (914
18、-mm) diameter.TABLE 2 LengthStandard Rods, Bars, Shapes, and Flat SheetAllowable Deviation from Specified Length, +, in. (+, mm), except as notedLength up to 8 ft (2.44 m)inclusiveLength over 8 to 24 ft (2.44 to7.32 m) inclusiveLength over 24 ft (7.32 m)All Rods, Bars, and Shapes +0.25, 0 (+6.35, 0)
19、 +0.5, 0 (+12.7, 0) +3, 0 (+76.2, 0)TABLE 3 StraightnessStandard Bars, Rods, Shapes, and Flat SheetProductSpecified Diameter (Rods)Specified Width (Bars)Max Dimension (Shapes)Specified Thickness(Rectangles)Minimum Thickness(Shapes)Allowable Deviation (D) from Straight, in. (mm)in. (mm) in. (mm) In T
20、otal Length of PieceRods and square,hexagonal, andoctagonal barsall . 0.030 (2.5) length, ft (m)Rectangular bars Up to 1.499 (38.07), incl Up to 0.094 (2.4),incl0.050 (4.17) measured length, ft (m)0.095 (2.4) andover0.040 (3.33) measured length, ft (m)1.500 (38.10) and over all 0.040 (3.33) measured
21、 length, ft (m)ShapesOpen all all 0.050 (4.17) measured length, ft (m)ShapesClosed all all 0.030 (2.5) measured length, ft (m)AFlat Sheet all all 0.030 (2.5) measured length, ft (m)AAMeasured when weight of pultrusion minimizes the deviation by contact with flat surface.D3917 1512TABLE 4 TwistAStand
22、ard Bars and ShapesProductSpecified Width (Bars)Max Dimension(Shapes)Specified Thickness(Rectangles)Minimum Thickness(Shapes)Allowable Deviation from Straight, degin. (mm) in. (mm) In Lengths Up to 20 ft (6 m)Bars all all 1/ft (1/305 mm)Shapes-Open all all 1/ft (1/305 mm)Shapes-Closed all all 1/ft (
23、1/305 mm); 7 maxAMeasured when weight of pultrusion minimizes the deviation by contact with flat surface.TABLE 5 Flatness (Flat Surfaces)Standard Bars, Solid Shapes, Semihollow Shapes, and Flat SheetSurface Width, in. (mm)Maximum AllowableDeviation (D), in. (mm)Up to 1 (25.4), incl 0.008 (0.20)Over
24、1 (25.4) 0.008 (0.008) W, in. (mm)In any 1 in. (25.4 mm) of width 0.008 (0.20)Flat Sheet 0.008 (0.008) W, in. (mm)0.25 (6.35) MaxTABLE 6 Flatness (Flat Surfaces)Standard Hollow ShapesMinimumThickness ofCompositeForming theSurface, in.(mm)Maximum Allowable Deviation (D), in. (mm)Widths up to1 in. (25
25、.4 mm), incl, orany 1-in. (25.4-mm)Incrementof WiderSurfacesWidths over 1 in. (25.4 mm)Up to 0.187 (4.7), incl 0.012 (0.30) 0.012 (0.012) W, in. (mm)0.188 (4.8) and over 0.008 (0.20) 0.008 (0.008) W, in. (mm)D3917 1513TABLE 7 AngularityStandard Rods, Bars, and ShapesMinimum SpecifiedLeg Thickness,in
26、. (mm)Allowable Deviation from SpecifiedAngle,Angles 90 or less Angles more than 90Up to 0.749 (19.02), incl 2 2TABLE 8 CamberStandard Shapes (See 3.8)ProductEnvelope Diameter(Shapes)Minimum Thickness(Shapes)Allowable Deviation (D) from Straight, in.(mm)in. (mm) in. (mm) In total length of pieceShap
27、es All Up to 0.094 (2.4), incl 0.050 (4.17) measured length, ft (m)TABLE 9 Squareness of End CutStandard Rods, Bars, Shapes, and Flat SheetProfiles over 2 in. (50.8 mm) in diameter or width 1Profiles 2 in. (50. 8 mm) inclusive and under in diameter or width 2SUMMARY OF CHANGESCommittee D20 has ident
28、ified the location of selected changes to this standard since the last issue (D3917 12) that may impact the use of this standard. (April 1, 2015)(1) Introduced tolerances for pultruded flat sheets.(2) Changed unilateral thickness tolerances to bilateral toler-ances.(3) Changed the length tolerance f
29、rom bilateral to unilateraltolerances.(4) Added tolerances for squareness of end cut.(5) Revised the definition of camber: camberthe deviation ofthe edge or surface from a reference straight line with theweight of the pultrusion not minimizing the measurement.(6) Changed note for Table 1 to: The min
30、imum tolerances areapplicable for thicknesses less than 0.05 in (1.27 mm)(7) Eliminated the 1 degree footnote in Table 7.(8) Removed the web/flange camber drawing in Table 8 as weband flange cambers cannot be combined.(9) Changed the spelling error from enclusive to inclusive inTable 9.(10) Modified
31、 metric conversions (where ever applicable)when a ratio was required to represent a tolerance allowablebased on a deviation per length. In addition the mm/mmconversions that were not correct before were addressed.D3917 1514ASTM International takes no position respecting the validity of any patent ri
32、ghts asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at an
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34、ill receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by A
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