ASTM_D_3076_-_18.pdf

Designation:D307618Standard Practice forEffective Crimping on Outside Crimped Valves of AerosolContainers1This standard is issued under the fixed designation D3076;the number immediately following the designation indicates the year oforiginal adoption or,in the case 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.Scope1.1 This practice covers the effective crimping on outsidecrimped valves within the wide parameters of containers andvalves available.1.2 Practices appear in the following order:SectionsOptical Comparator Practice4 to 7Caliper Practice8 to 121.3 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.5 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D996 Terminology of Packaging and Distribution Environ-mentsD3064 Terminology Relating to Aerosol Products3.Terminology3.1 General definitions for packaging and distribution envi-ronments are found in Terminology D996.3.2 General definitions of terms relating to aerosol productsare found in D3064.OPTICAL COMPARATOR PRACTICE4.Summary of Practice4.1 This practice involves drawing a projected,enlargedprofile of the container and valve,then removing the valve anddrawing the projected profile of the container finish.Measuringthe resultant void and subtracting the dimensions of theessentially noncompressed components from this value resultsin the value representing the compressed thickness of the valvesealing gasket.5.Significance and Use5.1 This practice provides information for the establishmentof quality control procedures on filling lines.6.Apparatus6.1 Optical Comparator.6.2 Clamping Jig,fastened to the comparator bench.6.3 Grinder,electric,small enough to be hand held.7.Procedure7.1 Crimp a valve on an empty bottle with the line crimperset at normal operation,and clamp the bottle in the jig on thecomparator bench.7.2 Draw the projected,enlarged image on tracing paper.NOTE1Grid ruled tracing paper makes the tracing much easier.7.3 Without disturbing the paper or bottle,cut a wedge outof the valve with the electric grinder,and remove the valve.7.4 Trace the projected image of the container alone on thesame paper.7.5 Measure the void between the two silhouettes(Fig.1and Fig.2).Subtract the dimensions(multiplied by theenlargement factor of the essentially uncompressed compo-nents of the valve)from this value to obtain the thickness of thecompressed gasket multipled by the enlargement factor,andconvert this reading into percent compression.1This practice is under the jurisdiction of ASTM Committee D10 on Packagingand are the direct responsibility of Subcommittee D10.33 on Aerosol Products.Thispractice was originally developed by the Chemical Specialties Manufacturers Assn.Current edition approved May 1,2018.Published June 2018.Originallyapproved in 1972.Last previous edition approved in 2010 as D3076 00(2010).DOI:10.1520/D3076-18.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 CALIPER PRACTICE8.Summary of Practice8.1 This practice involves a measurement of the height ofthe uncrimped portion of the valve.The points between whichthe measurement is made are self-determining when thecalipers are held parallel to the side of the valve.Meandimensions are used in calculating the effective crimp height.9.Significance and Use9.1 This practice provides information for the establishmentof quality control procedures on filling lines.10.Apparatus10.1 Calipers,vernier or dial.11.Procedure11.1 Select a filled bottle from the filling line at random.11.2 Mark off three points,120 apart,on the valve ferrule,carefully avoiding areas where stake marks occur.11.3 Holding the c