1、Designation: D3917 12Standard 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 revisio
2、n, 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. Scope1.1 This specification defines tolerances applicable to stan-dard rods, bars, and shapes pultruded from the
3、rmosettingglass-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 tolerances that vary from thestandard.1.4 The values stated in inch-pound
4、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 pertains only to thetest methods portion, Section 4, of this specification: Thiss
5、tandard 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 applicability of regulatory limita-tions prior to use.NOTE 1There is no known ISO
6、 equivalent to this standard.2. Terminology2.1 Definitions:2.1.1 camberthe deviation of the edge or surface from areference straight line.2.1.2 mean wall thicknessthe average of two or more wallthickness measurements taken at multiple locations.2.1.3 straightnessthe upward deviation of a pultrudedsh
7、ape when resting on a flat surface measured in a manner thatthe weight of the pultruded part minimizes the deviation.2.1.4 unilateral tolerancea tolerance in which the varia-tion is permitted in one direction (either “+” or “-”) from thespecified dimension.3. Dimensional Criteria3.1 Dimensional tole
8、rances for cross sections shall be pre-scribed in Table 1.3.2 Length tolerances for standard rods, bars, and shapesshall 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 pre-scribed in Table 4
9、 (also see 4.3).3.5 Flatness (flat surface) tolerances for bars, solid shapes,and semihollow shapes shall be as prescribed in Table 5.3.6 Flatness (flat surface) tolerances of hollow shapes shallbe as prescribed in Table 6.3.7 Angularity tolerances for bars and shapes shall be asprescribed in Table
10、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 a special customer requirement.3.9 The selection, type, and amount of reinforcements, aswell as resin system used, directly affect dim
11、ensions. Toler-ances shall be agreed upon between the supplier and the user.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 straightne
12、ss by placing thesection on a level table so that the arc or departure fromstraightness is vertical. Measure the vertical depth of the arcwith a feeler gauge, a straightedge, or both.4.3 Measure twist by placing the pultruded section on a flatsurface and using an inclinometer. An inclinometer is aco
13、mmercially available device used to measure the angle ofinclination.4.4 Measure angles with protractors or gauges.5. Keywords5.1 dimensional tolerance; pultruded shapes; thermosettingplastic1This specification is under the jurisdiction of ASTM Committee D20 onPlastics and is the direct responsibilit
14、y of Subcommittee D20.18 on ReinforcedThermosetting Plastics.Current edition approved April 1, 2012. Published May 2012. Originallyapproved in 1980. Last previous edition approved in 2011 as D3917 - 11. DOI:10.1520/D3917-12.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Cons
15、hohocken, PA 19428-2959, United States.TABLE 1 Cross-Sectional DimensionsStandard Rods, Bars, and ShapesStandard Pultruded Section with Dimension up to 36-in. (914-mm) DiameterSpecified Dimension, in. (mm)Solid Dimensions, 6in. (mm)A,AADie StruckDimensionABWall Thickness(open shape)CWall Thickness(c
16、losed shape)All 64%(0.094 in. max)10 % of specifieddimension, but notexceeding either0.100 (2.54) max or0.010 (0.25) min20 % of specified dimension, but notexceeding either0.100 (2.54) max or0.010 (0.25) minAThe outside dimension of a tube.TABLE 2 LengthStandard Rods, Bars, and ShapesAAllowable Devi
17、ation from Specified Length, +in. (+mm), except as notedin. (mm)Up to 8 ft (3.65 m)in Length, inclOver 8 to 24 ft (3.65to 9.14 m) in Length,inclOver 24 to 50 ft (9.14to 15.24 m) in Length,inclUp to 0.499 (12.67) incl 618 (63.18) 614 (66.35) 63(676.2)0.500 to 1.249 (12.70 to 31.72) incl 618 (63.18) 6
18、14 (66.35) 63(676.2)1.250 to 2.999 (31.75 to 76.17) incl 618 (3.18) 614 (66.35) 63(676.2)3.000 to 7.999 (76.20 to 203.17) incl 6316 (4.76) 614 (66.35) 63(676.2)AA unilateral tolerance is permitted if the range remains the same.TABLE 3 StraightnessStandard Bars, Rods, and ShapesProductSpecified Diame
19、ter (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 Total Length of PieceRods and square,hexagonal, andoctagonal barsall . 0.030 (0.51) 3 length, ft (m)Rectangular bars Up to
20、 1.499 (38.07), incl Up to 0.094 (2.4),incl0.050 (1.3) 3 measured length, ft (m)0.095 (2.4) andover0.040 (1.01) 3 measured length, ft (m)1.500 (38.10) and over all 0.040 (1.01) 3 measured length, ft (m)ShapesOpen all all 0.050 (1.3) 3 measured length, ft (m)ShapesClosed all all 0.030 (1.3) 3 measure
21、d length, ft (m)AAMeasured when weight of pultrusion minimizes the deviation by contact with flat surface.D3917 122TABLE 4 TwistAStandard Bars and ShapesProductSpecified Width (Bars)Max Dimension(Shapes)Specified Thickness(Rectangles)Minimum Thickness(Shapes)Allowable Deviation from Straight, degin.
22、 (mm) in. (mm) In Lengths Up to 20 ft (6 m)Bars all all 1/ftShapes-Open all all 1/ftShapes-Closed all all 1/ft; 7 maxAMeasured when weight of pultrusion minimizes the deviation by contact with flat surface.TABLE 5 Flatness (Flat Surfaces)Standard Bars, Solid Shapes,and Semihollow ShapesSurface Width
23、, in. (mm)Maximum AllowableDeviation (D), in. (mm)Up to 1 (25.4), incl 0.008 (0.20)Over 1 (25.4) 0.008 (0.20) 3 W, in. (mm)In any 1 in. (25.4 mm) of width 0.008 (0.20)TABLE 6 Flatness (Flat Surfaces)Standard Hollow ShapesMinimumThickness ofCompositeForming theSurface, in.(mm)Maximum Allowable Deviat
24、ion (D), in. (mm)Widths up to1 in. (25.4mm), 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 (0.30) 3 W, in. (mm)0.188 (4.8) and over 0.008 (0.20) 0.008 (0.20) 3 W, in. (mm)D3917 123ASTM International takes no position respec
25、ting the validity of any patent rights 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 sta
26、ndard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM Internati
27、onal Headquarters. Your comments will 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
28、.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (f
29、ax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).TABLE 7 AngularityStandard Rods, Bars, and ShapesAMinimum SpecifiedLeg Thickness,in. (mm)Allowable Deviation fr
30、om SpecifiedAngle,6Angles 90 or less Angles more than 90Up to 0.749 (19.02), incl 2 2AThe end cut angularity is 61TABLE 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 pieceShapes All Up to 0.094 (2.4), incl 0.050 (1.01) 3 measured length, ft (m)D3917 124
