ASTM_D_7447_-_08_2014.pdf

Designation:D744708(Reapproved 2014)Standard Practice forSymbolizing Adhesive Applications1This standard is issued under the fixed designation D7447;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 a standard symbol that may be usedby the design-engineering community on engineering drawingsto indicate a bonded assembly for any type of adhesive.1.2 This design is based on criteria contained inANSI/AWSA2.4 as well as ISO 15785.1.3 The values given in SI units are to be regarded as thestandard.The values in parentheses are for information only.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 and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ANSI/AWS Standard:2ANSI/AWS A2.4 Symbols for Welding and NondestructiveTesting2.2 ISO Standard:2ISO 15785 Technical DrawingsSymbolic Presentation andIndication of Adhesive,Fold and Pressed Joints3.Significance and Use3.1 An adhesive symbol provides an efficient means ofplacing complete information about adhesives on engineeringdrawings.The joint is the basis of reference for the symbol towhich the arrow line is pointed.The reference line of thesymbol is used to designate the type of adhesive to be used,including information about its physical form,chemical tech-nology family,requirements for surface preparation,applica-tion method(bead versus roll coat),and cure method.Theoptional tail(shown at left in Fig.1)provides a place to includeadditional information about the adhesive that is not referencedin other notations.3.2 Refer to Fig.1 for an overview schematic of theadhesive symbol denoted by a mast supporting a circle with theletter“A”inside for adhesive.Detail behind each of theelements noted(for example,FORM,CHEM,APPL METH)can be found in corresponding tables in Section 5.4.Elements of the Adhesive Symbol4.1 The elements represented in Fig.1 are explained ingreater detail in Tables 1-5 and Fig.2.4.2 Fig.3 illustrates an expanded view of the parametersdetailed in the tables described in Tables 1-5 and Fig.2.5.References and Other Notations5.1 SymbolsWithReferencesWhenspecifications,processes,or other references are used with the adhesivesymbol,the notation is placed in the tail(see“T”symbol inFig.1 or Fig.3).This notation may reflect information about aparticular manufacturers product or other pertinent data notcontained in the symbol elements.5.2 Symbols Without ReferencesSymbols may be usedwithout specifications,processes,or other references when:5.2.1 A note appears on the drawing:“Unless otherwisedesignated,all adhesive bonds are to be made in accordancewith Specification No.”5.2.2 The bonding procedure to be used is described else-where such as in shop instructions and process sheets:“Referto Instruction for bonding procedure.”5.3 Orientation of Bond JointThe horizontal orientation isdefault(“parallel line”element should be omitted)or theelement is present only when either inclined or vertical:5.3.1 If vertical orientation,display lines as“|”or5.3.2 If inclined orientation,display lines as“/.”5.4 Symbol Attachments to the Reference Line:5.4.1 Geometry of cross section of the dispensed bead styleBEAD X-SECT and5.4.2 An arrow-shaped element indicating surface applica-tion of the adhesive APP SURF that may be shown posi-tioned as:5.4.2.1 Above line onlyIf adhesive is to applied to sub-strate surface to which arrow is pointing,5.4.2.2 Below line onlyIf adhesive is to be applied tosubstrate surface opposite to which arrow is pointing,and1This practice is under the jurisdiction of ASTM Committee D14 on Adhesivesand is the direct responsibility of Subcommittee D14.60 on Adhesive MaterialClassification System.Current edition approved March 1,2014.Published March 2014.Originallyapproved in 2008.Last previous edition approved in 2008 as D7447 081.DOI:10.1520/D7447-08R14.2Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.4.2.3 Both above and below lineIf adhesive is to beapplied to both substrate surfaces.5.5 Symbol Attachments to the Intersection of the Referenceand Arrow LinesA circle is noted where the adhesive is to beapplied around the perimeter of a joint(for example,pipe toflange joint).5.6 The mast line contains“A”notation to denote adhesive.5.7 Symbol Attachments to“Circle A”Mast Line:5.7.1 The presence of a filled flag indicates the adhesive isto be applied in the field and the absence of this elementindicates fac