ANSI H American National Standard Dimensional Tolerances for Aluminum Mill Products. This Standard is a revision of ANSI H(M), which consists of logical values for long-term metric use rather than a restatement of ANSI. ANSI H American National Standard Dimensional Tolerances for Aluminum Mill Products, standard by American National Standards Institute .
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O81 Up thru 0. Welded Tube-A tube produced by forming and seamwelding sheet longitudinally. Whena dimension tolerance is specifiedother than asan equal bilateral tolerance, the value of the standard tolerance is that which applies to the mean of the maximum and minimum dimensions permissible under the tolerance for the dimension under consideration. Requests for interpretation should be addressedto the secretariator sponsorwhose name appears on the title page of this standard.
O As measured with a contour gauge whose surface is limitedto a maximum subtended angle of 90 degrees. Section Intentionally Blank 4. Thewidthtoleranceof a 1 x 3 inch alloy rectangular tube is Io.
As illustrated, a four-point contact system is used, two contact points being as dose to the angle vertex as prao and the others near the ends of the recpective surfaces foming me angle. Example-Alloy hollow profile having 1 x 3 rectangularoutside dimensions;width tolerance is Io. Allowable deviation from specified length: Fin Stock-Coiled sheet or foil in specific alloys, tempers, and thickness ranges suitable for manufacture of fins for heat-exchanger applications.
Applies only in a lengths 20 ft. O50 x Measured length, ft. Consensus is established when, in the judgment of the ANSI Board of Standards Review, substantial agreement has been reached by directly and materially affected interests. When a dimension tolerance is specified other than asan equal bilateral tolerance, the value of the standard tolerance is that which applies to the mean of the maximum and minimum dimensions permissible under the tolerance of the dimension under consideration.
Structural Profile-A profile rolled or extruded, in certain standard alloys, tempers, sizes, and sections, such as angles, channels, tees, zees, I-beams, and H-sections, commonly used for structural purposes. The term “Profile” is preferred. Straightnessmust be met in all orientations, including orientations which are not self-supporting. O98,Substantial agreement means g35.2 more than a simple majority, but not necessarily unanimity.
Conditions include die lines, mandrel lines and handling marks. From this measurement, the actual deviation from straightness of the bar at that point is subtracted.
All of these additions and refinements have been incorporatedinto this Standard. O90,Many refinements have been made in the tolerances as experiencewas gained in their use. Copyright The Aluminum Association Inc.
O07 I Not applicable to annealed O temper tube in.
When dimensions specified are outside and inside, rather than wall thickness itself, allowable deviation at any point eccentricity applies to mean wall thickness. The Olsen Cup and similar tests frequently used as measures of formability are not sufficiently reproducible to permit the establishment of standards for acceptance or rejection of material.
K x Measured length, ft. The mean wall thickness of round tube is the snsi of two measurements taken opposite each other. O Some papers may require a greater tolerance. Standards Committee H35 was transferred to an Accredited Standards Committee on December 28,and this revision was developed under the Accredited Standards Committee method. Between these points of measurementsurface flahess is the controlling tolerance.
ANSI H | The Aluminum Association
The followingvalues are used to convert angular tolerances to linear deviation: In that year a special committee was appointed by the Association’s Extruded Products Division to develop drafting standardsfor these products. From this measurement, the actual deviation from straightness of the welded tube at that point is subtracted.
O50x Measured length, fl.