1、Designation: D3917 151D3917 15aStandard 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
2、of revision, 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.1 NOTEEditorial corrections were made in July 2015.1. Scope*1.1 This specification defines production tol
3、erances applicable to standard rods, bars, shapes, and flat sheet pultruded fromthermosetting 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 s
4、pecific 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 mathematicalconversions to SI units that are provided for information only and are not considered standard.1.5 The following safety hazards cav
5、eat pertains only to the test methods portion, Section 4, of this specification:This standarddoes not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of thisstandard to establish appropriate safety and health practices and determin
6、e the applicability of regulatory limitations 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 a reference straight line with the weight of the pultrusion notminimizing the measurement.2.1.2 flat
7、sheeta rectangular solid pultruded profile with a width of 12 in. up to and including 78 inches.2.1.3 mean wall thicknessthe average of two or more wall thickness measurements taken at multiple locations.2.1.4 straightnessthe upward deviation of a pultruded shape when resting on a flat surface measu
8、red in a manner that theweight of the pultruded part minimizes the deviation.1 This specification is under the jurisdiction of ASTM Committee D20 on Plastics and is the direct responsibility of Subcommittee D20.18 on Reinforced ThermosettingPlastics.Current edition approved April 1, 2015Oct. 1, 2015
9、. Published April 2015October 2015. Originally approved in 1980. Last previous edition approved in 20122015 asD3917 - 12.D3917 - 15. DOI: 10.1520/D3917-15E01.10.1520/D3917-15A.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what cha
10、nges have been made to the previous version. Becauseit 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 versionof the standard as published by ASTM is to be considered the offi
11、cial document.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States13. Dimensional Criteria3.1 Cross-sectional dimensions for standard rods, bars, and shapes shall be prescrib
12、ed in Table 1.3.1.1 For die struck dimension, if the calculated tolerance as per above table is more than 0.094 in. (2.39 mm), then the diestruck dimension tolerance shall be 60.094 in. (2.39 mm).3.1.2 For wall thickness of open shapes and closed shapes and flatsheets of thickness under 0.125 in. (3
13、.175 mm) dimensions,if the calculated tolerance as per above table is less than 0.01 in. (0.25 mm), the thickness tolerance shall be 60.01 in. (0.25 mm).3.1.3 For wall thickness and flatsheets of thickness over 0.125 in. (3.175 mm) dimensions, if the calculated tolerance as perabove table is more th
14、an 0.05 in. (1.27 mm), the thickness tolerance shall be 60.05 in. (1.27 mm).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).TABLE 1 Cross-Sectional DimensionsStandard Rods, Bars,
15、and ShapesSolid Dimensions, in. (mm)ADie StruckDimensionA, BBWall ThicknessB(Open Shape)BThickness (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) min
16、AThe outside dimension of a part.BStandard pultruded section with dimension up to 36-in. (914-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 (2.4
17、4 to7.32 m) inclusive Length over 24 ft (7.32 m)All Rods, Bars, and Shapes +0.25, 0 (+6.35, 0) +0.5, 0 (+12.7, 0) +3, 0 (+76.2, 0)TABLE 3 StraightnessA Standard Bars, Rods, Shapes, and Flat SheetProductSpecified Diameter (Rods)Specified Width (Bars)Max Dimension (Shapes)Specified Thickness(Rectangle
18、s)Minimum Thickness(Shapes)Allowable Deviation (D) from Straight, in. (mm)in. (mm) in. (mm) In Total 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 (
19、2.4) andover0.040 (3.33) measured length, ft (m)1.500 (38.10) and over all 0.040 (3.33) measured 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)Flat Sheet all all 0.030 (2.5) measured length, ft (m)AMeasured when weight of
20、 pultrusion minimizes the deviation by contact with flat surface.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, semihollow shapes, and flat sheet shall be as prescribed in Table 5.3.6 Flatness (
21、flat surface) tolerances of hollow shapes shall be as prescribed in Table 6.D3917 15a2TABLE 4 TwistA Standard 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
22、 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 (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
23、SheetSurface Width, in. (mm)Maximum AllowableDeviation (D), in. (mm)Up to 1 (25.4), incl 0.008 (0.20)Over 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 ShapesMinimumThic
24、kness ofCompositeForming theSurface, in.(mm)Maximum Allowable Deviation (D), in. (mm)Widths up to1 in. (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 (0.00
25、8) W, in. (mm)3.7 Angularity tolerances for bars and shapes shall be as prescribed in Table 7 (also see 4.4).3.8 Camber tolerances for shapes can be as prescribed in Table 8, if required by the customer. Camber is not specified forstandard shapes but will be a special customer requirement.3.9 The se
26、lection, type, and amount of reinforcements, as well as resin system used, directly affect dimensions. Tolerances shallbe 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 Metho
27、ds4.1 Obtain the specified tolerances with conventional measuring equipment. Measuring procedures, gages, and fixtures shall beagreed upon between the supplier and the user.D3917 15a34.2 Measure departure from straightness by placing the section on a level table so that the arc or departure from str
28、aightnessis vertical. Measure the vertical depth of the arc with a feeler gauge, a straightedge, or both.4.3 Measure twist by placing the pultruded section on a flat surface and using an inclinometer. An inclinometer is acommercially available device used to measure the angle of inclination.4.4 Meas
29、ure angles with protractors or gauges.5. Keywords5.1 dimensional tolerance; pultruded shapes; thermosetting plasticTABLE 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
30、StruckDimensionA, BBWall ThicknessB(Open Shape)BThickness (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.BStandar
31、d pultruded section with dimension up to 36-in. (914-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) inclusive Length over 24 ft (
32、7.32 m)All Rods, Bars, and Shapes +0.25, 0 (+6.35, 0) +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 Deviat
33、ion (D) from Straight, in. (mm)in. (mm) in. (mm) In Total 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, f
34、t (m)1.500 (38.10) and over all 0.040 (3.33) measured 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 co
35、ntact with flat surface.D3917 15a4TABLE 4 TwistA Standard 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-Op
36、en all all 1/ft (1/305 mm)Shapes-Closed all all 1/ft (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 AllowableDeviati
37、on (D), in. (mm)Up to 1 (25.4), incl 0.008 (0.20)Over 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
38、Allowable Deviation (D), in. (mm)Widths up to1 in. (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 15a5TABLE 7 AngularityStandard R
39、ods, Bars, and ShapesMinimum SpecifiedLeg Thickness,in. (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,
40、 in.(mm)in. (mm) in. (mm) In total length of pieceShapes 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 diamet
41、er or width 2SUMMARY OF CHANGESCommittee D20 has identified 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 bi
42、lateral tolerances.(3) Changed the length tolerance from bilateral to unilateral tolerances.(4) Added tolerances for squareness of end cut.(5) Revised the definition of camber: camberthe deviation of the edge or surface from a reference straight line with the weightof the pultrusion not minimizing t
43、he measurement.(6) Changed note for Table 1 to: The minimum tolerances are applicable 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 web and flange cambers cannot be combined.(9) Changed the spelling
44、error from enclusive to inclusive in Table 9.(10) Modified metric conversions (where ever applicable) when a ratio was required to represent a tolerance allowable based ona deviation per length. In addition the mm/mm conversions that were not correct before were addressed.D3917 15a6ASTM Internationa
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