ASTM D3089-97(2003)

Standard Practice for Determining the A-D Dimension of Aerosol Valve Dip Tubes

SIGNIFICANCE AND USE
Using dip tubes of the correct length is helpful by enabling the user to discharge essentially all the product from the dispenser, preventing the tube from becoming jammed into an incorrect position as a result of gassing, preventing the (non-dimpled) valve cup from excessively protruding from the can plug and perhaps causing production problems at the crimper or gasser/crimper, and preventing the tube from bottoming on the flat base of some aluminum cans in such a way that a seal is made that will act to limit or stop the entry of product into the tube when the valve is actuated.
Dip tubes that extend fully to the bottom of the dispenser, without excessive distortion, can also aid in retaining their connection to the valve body tailpiece, which may be important if the aerosol content exerts a very significant swelling action upon the dip tube plastic.
The choice of A-D dimension is influenced by a number of factors. These factors include:
2.3.1 Tube curvature, which may vary considerably between tubes.
2.3.2 Variation of valve cup and valve cup gasket thickness.
2.3.3 Elevation or suppression of the valve pedestal (thus top end of the dip tube) upon crimping.
2.3.4 Elevation of valve pedestal during hot-tanking, only partly diminished upon subsequent cooling.
2.3.5 Swelling (or shrinking) action of the product on the dip tube.
SCOPE
1.1 This practice covers the rapid determination of the A-D dimension defined as the centerline dimension from the top plane of the valve mounting cup curl to the far end of the dip tube. See Fig. 1.  
1.2 This practice is limited to valves with 1 in. (25.4mm) mounting cups.

General Information

• Status: Historical
• Publication Date: 09-Sep-1997
• ICS: 55.130 - Aerosol containers
• Technical Committee: D10 - Packaging
• Drafting Committee: D10.33 - Aerosol Products

Relations

• Replaces: ASTM D3089-97 - Standard Practice for Determining the A-D Dimension of Aerosol Valve Dip Tubes
• Effective Date: 10-Sep-1997
• Replaced By: ASTM D3089-97(2008) - Standard Practice for Determining the A-D Dimension of Aerosol Valve Dip Tubes
• Effective Date: 01-Oct-2008

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
Designation: D 3089 – 97 (Reapproved 2003)
Standard Practice for
Determining the A-D Dimension of Aerosol Valve Dip Tubes
This standard is issued under the fixed designation D 3089; 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.
1. Scope
1.1 This practice covers the rapid determination of the A-D
dimension defined as the centerline dimension from the top
plane of the valve mounting cup curl to the far end of the dip
tube. See Fig. 1.
1.2 This practice is limited to valves with 1-in. (25.4-mm)
mounting cups.
2. Significance and Use
2.1 Using dip tubes of the correct length is helpful by
enabling the user to discharge essentially all the product from
the dispenser, preventing the tube from becoming jammed into
an incorrect position as a result of gassing, preventing the
(non-dimpled) valve cup from excessively protruding from the
can plug and perhaps causing production problems at the
crimper or gasser/crimper, and preventing the tube from
bottoming on the flat base of some aluminum cans in such a
way that a seal is made that will act to limit or stop the entry
of product into the tube when the valve is actuated. FIG. 1 Aerosol Valve “A-D” Dimension
2.2 Dip tubes that extend fully to the bottom of the
dispenser, without excessive distortion, can also aid in retain- 3. Apparatus
ing their connection to the valve body tailpiece, which may be
3.1 Gage for Measuring AD dimension, Figs. 2-6 or
important if the aerosol content exerts a very significant
equivalent—This device consists of three machined parts. In
swelling action upon the dip tube plastic.
addition, a scale graduated in ⁄32 in. (ruler) is glued to the scale
2.3 The choice ofA-D dimension is influenced by a number
block, and a foam pad base may be added to achieve nonslip
of factors. These factors include:
characteristics.
2.3.1 Tubecurvature,whichmayvaryconsiderablybetween
tubes. 4. Calibration and Standardization
2.3.2 Variation of valve cup and valve cup gasket thickness.
4.1 Ensure that the reference plane against which the top of
2.3.3 Elevation or suppression of the valve pedestal (thus
the valve cup rests is at zero on the scale.
top end of the dip tube) upon crimping.
2.3.4 Elevation of valve pedestal during hot-tanking, only
partly diminished upon subsequent cooling.
2.3.5 Swelling (or shrinking) action of the product on the
dip tube.
This practice is under the jurisdiction of ASTM Committee D10 on Packaging
and is the direct responsibility of Subcommittee D10.33 on Mechanical Dispensers.
This practice was originally developed by the Chemical Specialties Manufacturers
Assn. and is described in The Aerosol Handbook (Second Edition), Montford A.
Johnson, 167 and 182, (1982). Wayne E. Dorland & Co. (Mendham, N.J.)
Current edition approved S
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