butt

精fullpenetrationbuttweld满对接焊【主科技词汇】

近completepenetrationbuttweld贯穿对焊【主科技词汇】

近full-penetrationweld全焊透焊缝【航海航天词汇】

近weldpenetration焊穿;焊接渗透;焊透度【航海航天词汇】

近weldpenetration溶透【机械专业词汇】

近penetrationweld熔透焊缝【主科技词汇】

近weldpenetration焊缝熔深;焊透深度【主科技词汇】

近V-buttweldV形坡口焊缝【航海航天词汇】

近buttweld对接焊;对接焊缝【航海航天词汇】

近butt-weld碰焊;平式焊接;对头焊接【主科技词汇】

近buttweld对接焊缝【铸造焊接词汇】

近buttweld对接焊缝【建筑学词汇】

近buttweld对接焊缝【机械专业词汇】

近butt-weld对接焊缝【石油词汇】

近anglebuttweld斜口对接焊缝【航海航天词汇】

近flashbuttweld闪光焊【主科技词汇】

近reinforcedbuttweld补强的对接焊缝;补强式对接焊缝【主科技词汇】

近plainbuttweld无坡口对接焊;平头对接焊缝【主科技词汇】

近flangedbuttweld弯边对接焊【主科技词汇】

近resonancebuttweld谐振式对接焊【主科技词汇】

近plainbutt-weld对焊【石油词汇】

近flashbuttweld闪光对杆【建筑学词汇】

近flashbuttweld(ing)电弧对接焊【主科技词汇】

近straightbuttweld无坡口对接接头【主科技词汇】

近plainbuttweld平边对接焊缝【航海航天词汇】

近anglebuttweld斜对接焊【主科技词汇】

近squarebuttweld平头对接焊缝【主科技词汇】

近buttweldends对头焊接端【主科技词汇】

近unfitnessofbuttweld焊缝对口错边量【主科技词汇】

近openbuttweld开口对接焊【主科技词汇】

近clodbuttweld连续对接焊缝【航海航天词汇】

近butt-weldjoint对头焊接【主科技词汇】

近double-flangedbuttweld双弯边对接焊缝【主科技词汇】

近butt-weldpipemill对焊管轧机【主科技词汇】

近double-bevelbuttweldK形坡口对接焊缝【航海航天词汇】

近continuousbutt-weldfurnace连续式焊管坯加热炉【进出口词汇】

近continuousbutt-weldmill连续式炉焊管机组【进出口词汇】

近butt-weldinthedownhandposition对接平焊【主科技词汇】

近singlestrapbuttweld单面盖板对接焊【主科技词汇】

近buttweldpipemill直缝焊管轧机【进出口词汇】

近fullpenetration全熔透【主科技词汇】

近fullpenetration焊透【航海航天词汇】

近fullpenetration(welding)完全焊透【建筑学词汇】

近fullweld满焊【主科技词汇】

近fullfilletweld满角焊缝;全角焊【主科技词汇】

近full-sizedweld全尺寸焊缝【主科技词汇】

近fulllongitudinalweld纵向全焊接【石油词汇】

近full-filletweld满角焊【主科技词汇】

近fullfilletweld满角焊【航海航天词汇】

近full-strengthweld(与母材等强)等强焊缝【主科技词汇】

近fullweld-onpipebascreen带中心管的全焊接筛管【石油词汇】

近backingweld(beforemakingmainweld);backweld打底焊道【铸造焊接词汇】

近incompletepenetration;lackofpenetration未焊透【铸造焊接词汇】

近alingrun(aftermakingmainweld);backweld封底焊道【铸造焊接词汇】

近weldslope;inclinationofweldaxis焊缝倾角【铸造焊接词汇】

近girthweld;circumferentialweld环行焊缝【铸造焊接词汇】

近spiralweld;helicalweld螺旋形焊缝【铸造焊接词汇】

近buttamwelding;foil-buttam对接缝焊【铸造焊接词汇】

近frontfilletweld;filletweldinnormalshear正面角焊缝【铸造焊接词汇】

近sidefilletweld;filletweldinparallelshear侧面角焊缝【铸造焊接词汇】

近full-screenfull-motionvideo(FSFMV)全屏幕全动式视讯【计算机网络词汇】

近weldarcspotweld电弧点焊缝【航海航天词汇】

近flushweld;weldmachinedflush削平焊缝【铸造焊接词汇】

近spotweld-bonding;weld-bonding胶接点焊【铸造焊接词汇】

近weldspacing;spotweldspacing焊点距【铸造焊接词汇】

近penetrationvalue针入值【主科技词汇】

近penetration穿透;侵彻;渗透;透过【航海航天词汇】

近penetration焊透;贯穿;贯入度;穿透;穿透度;穿透率;浸透;熔透【主科技词汇】

近penetration贯穿【生物词汇】

近inkpenetration墨渗透【主科技词汇】

近penetration贯穿【天文学词汇】

近penetration贯穿【电子工程词汇】

近meanpenetration(桩)平均贯入度【主科技词汇】

近penetration穿透【医学制药词汇】

近specifiedpenetration指定贯入度【主科技词汇】

近bitpenetration钻头吃入深度;钻头进尺速度【石油词汇】

近dippenetration浸渍饱和程度【石油词汇】

近penetrationcour贯入层【主科技词汇】

近oilpenetration渗油性能【媒体出版词汇】

近overallpenetration总穿透深度【石油词汇】

近penetration穿透【矿业词汇】

近penetration穿透;贯穿【铸造焊接词汇】

近penetrationn.穿过;渗透【考研词汇】

近penetrationlog钻速记录【主科技词汇】

近penetration浸透;渗透【媒体出版词汇】

近penetrationpen进尺笔【石油词汇】

近penetrationpeg穿透钉【主科技词汇】

近penetration渗透性【汽车词汇】

近penetration渗透【法律词汇】

近penetrationn.穿透;刺穿【大学词汇】

近penetrationn.穿透;洞察力【GRE词汇】

近penetration浸透;熔深【机械专业词汇】

近penetration贯穿;渗入【建筑学词汇】

近buttbox大块氧化皮收集箱【主科技词汇】

近buttlog根端原木【主科技词汇】

近butt暴露煤面;背皮;铸块;根端;干基;截土;大头;抵触【主科技词汇】

近buttup平接好【石油词汇】

近buttandbutt两头对接【主科技词汇】

近butt平接;端面【石油词汇】

近Butt截头;切方【建筑学词汇】

eading

L

gorsketchingisauniversallanguageudtoconveyallnecessaryinformationto

arealsoudtoillustratehowvarious

equipmentisoperated,maintained,repaired,ginaldrawingsforprintsaremade

eitherbydirectlydrawingortracingadrawingonatranslucenttracingpaperorclothusingwaterproof

(India)ginaldrawingisreferredtoasatracingormastercopy.

smethodsofreproductionhavebeendevelopedwhichwillproduce

printsofdifferentcolorsfromthemastercopy.

(1)Oneofthefirstprocessdevidtoreproduceatracingproducedwhitelinesonabluebackground,

hencetheterm"blueprints".

(2)Apatentedpaperidentifiedas"BW"paperproducesprintswithblacklinesonawhitebackground.

(3)Theammoniaprocess,or"Ozalids",producesprintswitheitherblack,blue,ormaroonlinesona

whitebackground.

(4)Vandykepaperproducesawhitelineonadarkbrownbackground.

(5)Otherreproductionmethodsarethemimeographmachine,dittomachine,andphotostaticprocess.

FADRAWING

leblockcontainsthedrawingnumberandalltheinformationrequiredtoidentifythe

edmilitaryprintswillincludethenameandaddressofthe

GovernmentAgencyororganizationpreparingthedrawing,thescale,thedraftingrecord,authentication,

andthedate.

a

arevisionblockisnotud,areviddrawingmaybeshownbytheadditionofalettertotheoriginal

number.

nthasmorethanonesheet

andeachsheethasthesamenumber,thisinformationisincludedinthenumberblock,indicatingthe

sheetnumberandthenumberofsheetsintheries.

ncenumbersthatappearinthetitleblockreferto

rethanonedetailisshownonadrawing,dashesandnumbersare

artsaretobeshowninonedetaildrawing,bothprintswillhavethesamedrawing

numberplusadashandanindividualnumbersuchas7873102-1and7873102-2.

catesthesize

easureadrawing--udimensions.

Theprintmayhavebeenreducedinsizefromtheoriginaldrawing.

alblockorboxonthedrawingmaycontainalistofnecessarystocktomakean

indicatesthetypeofstock,size,andspecificamountrequired.

UCTIONLINES

nes(A,fig.3-1).Fulllinesreprentthevisibleedgesoroutlinesofanobject.

Lines(A,fig.3-1).Hiddenlinesaremadeofshortdasheswhichreprenthiddenedgesofan

object.

Lines(B,fig.3-1).hrough

thecenterofanobjectiscalledacenterline.

gPlaneLines(B,fig.3-1).Cuttingplanelinesaredashedlines,generallyofthesamewidthas

thefulllines,olidwinglinesateachendofthecuttingline

projectat90degrel

lettersornumeralsareplacedjustbeyondthepointsofthearrowstodesignatethection.

ionLines(A,fig.3-1).eud

toindicatethemeasureddistancebetweentwopoints.

ionLines(A,fig.3-1).Extensionlinesarefinelinesfromtheoutsideedgesorintermediate

dicatethelimitsofdimensionlines.

ines(C,fig.3-1).Breaklinesareudtoshowabreakinadrawingandareudwhenitis

desiredtoincreathescaleofadrawingofuniformcrossctionwhileshowingthetruesizeby

retwokindsofbreaklines:reaklinesare

usuallyheavy,wavy,ak

linesarelongdashparallellineswitheachlongdashinthelineconnectedtothenextbya"2"orsharp

waveline.

DWELDINGSYMBOLS

L

Weldingcannottakeitsproperplaceasanengineeringtoolunlessmeansareprovidedforconveyingthe

gsymbolsprovidethemeansofplacingcomplete

emeforsymbolicreprentationofweldsonengineering

drawingsudinthismanualisconsistentwiththe"thirdangle"themethod

predominantlyudintheUnitedStates.

erencelineoftheweldingsymbol(fig.3-2)

isudtodesignatethetypeofweldtobemade,itslocation,dimensions,extent,contour,andother

dedjointindicatedbyasymbolwillalwayshaveanarrowsideandan

ingly,thetermsarrowside,otherside,andbothsidesareudhereintolocatethe

weldwithrespecttothejoint.

Thetailofthesymbolisudfordesignatingtheweldingandcuttingprocessaswellasthewelding

specifications,procedures,der

knowsthesizeandtypeofweld,

process,identificationoffillermetalthatistobeud,whetherornotpeeningorrootchippingisrequired,

ationtobeplacedinthetailofthesymbol

tionsarenotud,thetailofthesymbolmay

beomitted.

SOFAWELDINGSYMBOL

Adistinctionismadebetweentheterms"weldsymbol"and"weldingsymbol".Theweldsymbol(fig.3-3)

dingsymbol(fig.3-2)isamethodofreprentingtheweld

embled"weldingsymbol"consistsofthefollowingeightelements,oranyof

theelementsasnecessary:referenceline,arrow,basicweldsymbols,dimensionsandotherdata,

supplementarysymbols,finishsymbols,tail,andspecification,process,ations

ofweldingsymbolelementswithrespecttoeachotherareshowninfigure3-2.

ELDSYMBOLS

mbolsareudtoindicatetheweldingprocessudinmetaljoiningoperations,

whethertheweldislocalizedor"allaround",whetheritisashoporfieldweld,andthecontourofwelds.

Thebasicweldsymbolsaresummarizedbelowandillustratedinfigure3-3.

ure3-3.

ure3-3.

g,Forge,Thermit,Induction,andFlowWeldSymbols.

(1)Theweldsareindicatedbyusingaprocessorspecificationreferenceinthetailofthewelding

symbolasshowninfigure3-4.

(2)Whentheuofadefiniteprocessisrequired(fig.3-5),theprocessmaybeindicatedbyoneormore

oftheletterdesignationsshownintables3-1and3-2.

NOTE

Letterdesignationshavenotbeenassignedtoarcspot,resistancespot,arcam,resistanceam,and

projectionweldingsincetheweldsymbolsudareadequate.

(3)Whennospecification,process,orothersymbol,thetailmaybeomitted(fig.3-6).referenceisud

withawelding

s3-7and3-8illustratetheweld-all-aroundandfieldweldsymbol,

andresistancespotandresistanceamwelds.

ymbolsareudinmanyweldingprocessincongestionwith

weldingsymbolsandareudasshowninfigure3-3.

ONSIGNIFICANCEOFARROW

,Groove,Flange,Flash,symbols,thearrowconnectsthe

weldingsymbolreferencelinetoonesideofthejointandthissideshallbeconsideredthearrowsideof

thejoint(fig.3-9).Thesideoppositethearrowsideisconsideredtheothersideofthejoint(fig.3-10).

,Slot,ArcSpot,ArcSeam,ResistanceSpot,ResistanceSeam,andProjectionWeldingSymbols.

Forthesymbols,thearrowconnectstheweldingsymbolreferencelinetotheoutersurfaceofone

bertowhichthearrowpointsis

ermemberofthejointshallbeconsideredtheotherside

member(fig.3-11).

ointisdepictedbyasinglelineonthedrawingandthearrowofaweldingsymbol

isdirectedtothisline,thearrowsideofthejointisconsideredasthenearsideofthejoint,inaccordance

withtheusualconventionsofdrafting(fig.3-12and3-13).

ointisdepictedasanareaparalleltotheplaneofprojectioninadrawingand

thearrowofaweldingsymbolisdirectedtothatarea,thearrowsidememberofthejointisconsideredas

thenearmemberofthejoint,inaccordancewiththeusualconventionsofdrafting(fig.3-11).

ONOFTHEWELDWITHRESPECTTOJOINT

nthearrowsideofthejointareshownbyplacingtheweldsymbolonthesideof

thereferencelinetowardthereader(fig.3-14).

ntheothersideofthejointareshownbyplacingtheweldsymbolonthesideof

thereferencelineawayfromthereader(fig.3-15).

nbothsidesofthejointareshownbyplacingweldsymbolsonbothsidesofthe

referenceline,towardandawayfromthereader(fig.3-16).

ancespot,resistanceam,flash,weldsymbolshavenoarrowsideor

othersidesignificanceinthemlves,althoughsupplementarysymbolsudinconjunctionwiththe

mple,theflushcontoursymbol(fig.3-3)isudin

conjunctionwiththespotandamsymbols(fig.3-17)toshowthattheexpodsurfaceofonemember

ancespot,resistanceam,flash,anduptweldsymbolsshallbe

centeredonthereferenceline(fig.3-17).

NCESANDGENERALNOTES

pecification,process,orotherreferenceisudwithawelding

symbol,thereferenceisplacedinthetail(fig.3-4).

smaybeudwithoutspecification,process,orother

referenceswhen:

(1)Anotesimilartothefollowingappearsonthedrawing:"Unlessotherwidesignated,allweldsareto

bemadeinaccordancewithspecificationno...."

(2)Theweldingproceduretobeudisdescribedelwhere,suchasinshopinstructionsandprocess

sheets.

lnotessimilartothefollowingmaybeplacedonadrawingtoprovidedetailed

formationneednotberepeatedonthesymbols:

(1)"Unlessotherwiindicated,allfilletweldsare5/16in.(0.80cm)size."

(2)"Unlessotherwiindicated,rootopeningsforallgrooveweldsare3/16in.(0.48cm)."

eofadefiniteprocessisrequired,theprocessmaybeindicatedbythe

letterdesignationslistedintables3-1and3-2(fig.3-5).

specification,process,orotherreferenceisudwithawelding

symbol,thetailmaybeomitted(fig.3-6).

-ALL-AROUNDANDFIELDWELDSYMBOLS

xtendingcompletelyaroundajointareindicatedbymansoftheweld-all-aroundsymbol(fig.

3-7).Weldsthatarecompletelyaroundajointwhichincludesmorethanonetypeofweld,indicatedbya

combinationweldsymbol,ompletelyarounda

jointinwhichthemetalinterctionsatthepointsofweldingareinmorethanoneplanearealso

indicatedbytheweld-all-aroundsymbol.

eldsareweldsnotmadeinashoporattheplaceofinitialconstructionandareindicatedby

meansofthefieldweldsymbol(fig.3-7).

OFWELDINGDENOTEDBYSYMBOLS

sapplybetweenabruptchangesinthedirectionoftheweldingortothe

extentofhatchingofdimensionlines,exceptwhentheweld-all-aroundsymbol(fig.3-3)isud.

gonhiddenjointsmaybecoveredwhentheweldingisthesameasthatofthe

eldingonthehiddenjointis

differentfromthatofthevisiblejoint,specificinformationfortheweldingofbothmustbegiven.

ONOFWELDSYMBOLS

mbols,exceptresistancespotandresistanceam,mustbeshownonlyonthewelding

symbolreferencelineandnotonthelinesofthedrawing.

ancespotandresistanceamweldsymbolsmaybeplaceddirectlyatthelocationsofthe

desiredwelds(fig.3-8).

NCH,DEGREE,ANDPOUNDMARKS

NOTE

Inchmarksareudforindicatingthediameterofarcspot,resistancespot,andcircularprojectionwelds,

andthewidthofarcamandresistanceamweldswhensuchweldsarespecifiedbydecimal

dimensions.

Ingeneral,inch,degree,andpoundmarksmayormaynotbeudonweldingsymbols,asdesired.

UCTIONOFSYMBOLS

,bevelandJ-groove,flarebevelgroove,andcornerflangesymbolsshallbeshownwiththe

perpendicularlegalwaystotheleft(fig.3-18).

elorJ-grooveweldsymbol,thearrowshallpointwithadefinitebreaktowardthemember

whichistobechamfered(fig.3-19).Incaswherethemembertobechamferedisobvious,thebreakin

thearrowmaybeomitted.

ationonweldingsymbolsshallbeplacedtoreadfromlefttorightalongthereferencelinein

accordancewiththeusualconventionsofdrafting(fig.3-20).

ntshavingmorethanoneweld,asymbolshallbeshownforeachweld(fig3-21).

tersCPinthetailofthearrowindicateacompletepenetrationweldregardlessofthetypeof

weldorjointpreparation(fig.3-22).

ebasicweldsymbolsareinadequatetoindicatethedesiredweld,theweldshallbeshownby

acrossction,detail,orotherdatawithareferenceontheweldingsymbolaccordingtolocation

specificationsgiveninpara3-7(fig.3-23).

stoperation

uentoperationsmustbeshown

quentiallyonotherreferencelines(fig.3-24).Additionalreferencelinesmayalsobeudtoshowdata

supplementarytowe

informationmaybeshownonacondorthirdlineawayfromthearrow(fig.3-25).Whenrequired,the

weld-all-aroundsymbolmustbeplacedatthejunctionofthearrowlineandreferencelineforeach

operationtowhichitapplies(fig.3-26).Thefieldweldsymbolmayalsobeudinthismanner.

WELDS

Dimensionsoffilletweldsmustbeshownonthesamesideofthereferencelineastheweldsymbol(A,

fig.3-27).

lletweldsareindicatedonbothsidesofajointandnogeneralnotegoverningthedimensions

oftheweldsappearsonthedrawing,thedimensionsareindicatedasfollows:

(1)Whenbothweldshavethesamedimensions,oneorbothmaybedimensioned(BorC,fig.3-27).

(2)Whentheweldsdifferindimensions,bothmustbedimensioned(D,fig.3-27).

lletweldsareindicatedonbothsidesofajointandageneralnotegoverningthedimensionsof

theweldsappearsonthedrawing,r,ifthedimensionsofone

orbothweldsdifferfromthedimensionsgiveninthegeneralnote,bothweldsmustbedimensioned(Cor

D,fig.3-27).

FILLETWELDS

eofafilletweldmustofafilletweldbeshowntotheleftoftheweldsymbol(A,fig.3-27).

ethefilletweldwithunequallegsmustbeshowninparenthestoleftoftheweldsymbol.

Weldorientationisnotshownbythesymbolandmustbeshownonthedrawingwhennecessary(E,fig.

3-27).

otherwiindicated,thedepositedfilletweldsizemustnotbelessthanthesizeshownonthe

drawing.

netrationforagivenrootopeningisspecified,theinspectionmethodfordetermining

penetrationdepthmustbeincludedintheapplicablespecification.

OFFILLETWELDS

gthofafilletweld,whenindicatedontheweldingsymbol,mustbeshowntotherightofthe

weldsymbol(AthroughD,fig.3-27).

lletweldingextendsforthefulldistancebetweenabruptchangesinthedirectionofthewelding,

nolengthdimensionneedbeshownontheweldingsymbol.

iclengthsoffilletweldingmaybeindicatedbysymbolsinconjunctionwithdimensionlines(fig.

3-28).

OFFILLETWELDING

typeofhatching(withorwithoutdefinitelines)toshowtheextentoffilletweldinggraphically.

weldingextendingbeyondabruptchangesinthedirectionoftheweldingmustbeindicatedby

additionalarrowspointingtoeachctionofthejointtobewelded(fig.3-29)exceptwhenthe

weld-all-aroundsymbolisud.

IONINGOFINTERMITTENTFILLETWELDING

ch(center-to-centerspacing)ofintermittentfilletweldingshallbeshownasthedistance

betweencentersofincrementsononesideofthejoint.

chofintermittentfilletweldingshallbeshowntotherightofthelengthdimension(A,fig3-27).

ionsofchainin

intermittentfilletweldsshallbeoppositeeachother(fig.3-30).

ionsofstaggeredintermittentfilletweldingmustbeshownonbothsidesofthereferenceline

asshowninfigure3-31.

Unlessotherwispecified,staggeredintermittentfilletweldsonbothsidesshallbesymmetrically

spacedasinfigure3-32.

ATIONOFINTERMITTENTFILLETWELDING

termittentfilletweldingisudbyitlf,thesymbolindicatesthatincrementsarelocatedatthe

endsofthedimensionedlength.

termittentfilletweldingisudbetweencontinuousfilletwelding,thesymbolindicatesthat

spacequaltothepitchminusthelengthofoneincrementshallbeleftattheendsofthedimensioned

length.

tesymbolsmustbeudforintermittentandcontinuousfilletweldingwhenthetwoare

combinedalongonesideofthejoint(fig.3-28).

ECONTOUROFFILLETWELDS

weldsthataretobeweldedapproximatelyflat,convex,orconcavefacedwithoutrecourtoany

methodoffinishingmustbeshownbyaddingtheflush,convex,orconcavecontoursymboltotheweld

symbol,inaccordancewiththelocationspecificationsgiveninparagraph3-7(A,fig.3-33).

weldsthataretobemadeflatfacedbymechanicalmeansmustbeshownbyaddingboththe

flushcontoursymbolandtheur'sstandardfinishsymboltotheweldsymbol,inaccordancewith

locationspecificationsgiveninparagraph3-7(B,fig.3-33).

weldsthataretobemechanicallyfinishedtoaconvexcontourshallbeshownbyaddingboththe

convexcontoursymbolandtheur'sstandardfinishsymboltotheweldsymbol,inaccordancewith

locationspecificationsgiveninparagraph3-7(C,fig.3-33).

weldsthataretobemechanicallyfinishedtoaconcavecontourmustbeshownbyaddingboth

theconcavecontoursymbolandtheur'sstandardfinishsymboltotheweldsymbolinaccordancewith

locationspecificationgiveninparagraph3-7.

swheretheanglebetweenfusionfacesissuchthattheidentificationofthetypeofweldand

theproperweldsymbolisinquestion,thedetailofthedesiredjointandweldconfigurationmustbe

shownonthedrawing.

NOTEFinishsymbolsudhereindicatethemethodoffinishing("c"=chiping,"G"=grinding,"H"=

hammering,"M"=machining),notthedegreeoffinish.

DSLOTWELDINGSYMBOLS

rtheplugweldsymbolnortheslotweldsymbolmaybeudtodesignatefilletwelds

inholes.

rslotsinthearrowsidemember

ofajointforplugorslotweldingmustbeindicatedbyplacingtheweldsymbolonthesideofthe

referencelinetowardthereader(A,fig.3-11).Holesorslotsintheothersidememberofajointshallbe

indicatedbyplacingtheweldsymbolonthesideofthereferencelineawayfromthereader(B,fig.3-11).

ionsofplugweldsmustbeshownonthesamesideofthereference

edangle

ofcountersinkofplugweldsmustbetheur'edangleof

countersink,whennottheur'sstandard,mustbeshowneitheraboveorbelowtheweldsymbol(Aand

C,fig.3-34).Thepitch(center-to-centerspacing)ofplugweldsshallbeshowntotherightoftheweld

symbol.

ffillingofplugandslotweldsshallbecompleted

edepthoffillingislessthancomplete,thedepthoffillingshallbe

shownininchesinsidetheweldsymbol(B,fig.3-34).

ldsthataretobeweldedapproximatelyflush

withoutrecourtoanymethodoffinishingmustbeshownbyaddingthefinishcontoursymboltothe

weldsymbol(fig.3-35).Plugweldsthataretobeweldedflushbymechanicalmeansmustbeshownby

addingboththeflushcontoursymbolandtheur'sstandardfinishsymboltotheweldsymbol(fig.3-36).

ionsofslotweldsmustbeshownonthesamesideofthereferenceline

astheweldsymbol(fig.3-37).

,width,spacing,includedangleofcountersink,orientation,andlocation

tamustbeshownonthedrawingorbya

detailwithareferencetoitontheweldingsymbol,inaccordancewithlocationspecificationsgivenin

paragraph3-7(D,fig.3-33).

TANDARCSEAMWELDS

tweldsymbol,inaccordancewithitslocationinrelationtothereferenceline,mayor

ionsmustbeshownonthesamesideofthe

referencelineasthesymboloroneithersidewhenthesymbolislocatedastridethereferencelineand

cessreferenceisindicatedinthetailofthewelding

ojectionweldingistobeud,thespotweldsymbolshallbeudwiththeprojection

tweldsymbolmustbecentered

aboveorbelowthe,referenceline.

ArcSpotandArcSeamWelds.

(1)Theweldsmaybedimensionedbyeithersizeorstrength.

(2)mweldsizeshall

ionswillbeexpresdinfractionsorindecimalsin

hundredthsofaninchandshallbeshown,withorwithoutinchmarks,totheleftoftheweldsymbol(A,fig.

3-38).

(3)Thestrengthofarcspotweldsmustbedesignatedastheminimumaccept-ableshearstrengthin

eamwelds,strengthisdesignatedinpoundsperlinearinch.

Strengthisshowntotheleftoftheweldsymbol(B,fig.3-38).

gofArcSpotandArcSeamWelds.

(1)Thepitch(center-to-centerspacing)ofarcspotweldsand,whenindicated,thelengthofarcam

welds,mustbeshowntotherightoftheweldsymbol(C,fig.3-38).

(2)Whenspotweldingorarcamweldingextendsforthefulldistancebetweenabruptchangesinthe

directionofwelding,nolengthdimensionneedbeshownontheweldingsymbol.

andNumberofArcSpotWeldsandArcSeamWelds.

(1)Whenarcspotweldingextendslessthanthedistancebetweenabruptchangesinthedirectionof

weldingorlessthanthefulllengthofthejoint,theextentmustbedimensioned(fig.3-39).

(2)Whenadefinitenumberofarcspotweldsisdesiredinacertainjoint,thenumbermustbeshownin

parentheitheraboveorbelowtheweldsymbol(fig.3-40).

(3)Aowspointtoat

leastoneofthecenterlinespassingthrougheachweldlocation.

eexpodsurfaceofonememberofanarcspot

orarcamweldedjointistobeflush,thatsurfacemustbeindicatedbyaddingtheflushcontoursymbol

(fig.3-41)inthesamemannerasthatforfilletwelds(para3-21).

g,extent,orientation,andlocationofarcamweldscannotbe

tamustbeshownonthedrawing.

WELDS

l.

(1)Dimensionsofgrooveweldsmustbeshownonthesamesideofthereferencelineastheweld

symbol(fig.3-42).

(2)Whennogeneralnotegoverningthedimensionsofdoublegrooveweldsappears,dimensionsshall

beshownasfollows:

(a)Whenbothweldshavethesamedimensions,oneorbothmaybedimensioned(fig.3-43).

(b)Whentheweldsdifferindimensions,bothshallbedimensioned(fig.3-44).

(3)Whenageneralnotegoverningthedimensionsofgrooveweldsappears,thedimensionsofdouble

grooveweldsshallbeindicatedasfollows:

(a)Ifthedimensionsofbothweldsareasindicatedinthenote,neithersymbolneedbedimensioned.

(b)Whenthedimensionsofoneorbothweldsdifferfromthedimensionsgiveninthegeneralnote,both

weldsshallbedimensioned(fig.3-44).

GrooveWelds.

(1)Thesizeofgrooveweldsshallbeshowntotheleftoftheweldsymbol(fig.3-44).

(2)Specificationsforgrooveweldswithnospecifiedrootpenetrationareshownasfollows:

(a)Thesizeofsinglegrooveandsymmetricaldoublegrooveweldswhichextendcompletelythroughthe

memberormembersbeingjoinedneednotbeshownontheweldingsymbol(AandB,fig.3-45).

(b)Thesizeofgrooveweldswhichextendonlypartlythroughthemembermembersbeingjoinedmust

beshownontheweldingsymbol(AandB,fig.3-46).

(3)Thegroovewelds,sizeofgrooveweldswithspecifiedrootpenetration,exceptsquaremustbe

indicatedbyshowingthedepthofchamferingandtherootpenetrationparatedbyaplusmarkand

thofchamferingandtherootpenetrationmustreadinthat

orderfromlefttorightalongthereferenceline(AandB,fig.3-47).Thesizeofsquaregrooveweldsmust

beindicatedbyshowingonlytherootpenetration.

(4)Thesizeofflaregrooveweldsisconsideredtoextendonlytothetangentpointsasindicatedby

dimensionlines(fig.3-48).

Dimensions

(1)Rootopening,grooveangle,grooveradii,androotfacesoftheUandJgrooveweldsaretheur's

standardunlessotherwiindicated.

(2)Whentheur'sstandardisnotud,theweldsymbolsareasfollows:

(a)Rootopeningisshowninsidetheweldsymbol(fig.3-49).

(b)Grooveangleofgrooveweldsisshownoutsidetheweldsymbol(fig.3-42).

(c)GrooveradiiandrootfacesofUandJgrooveweldsareshownbyacrossction,detail,orother

data,withareferencetoitontheweldingsymbol,inaccordancewithlocationspecificationsgivenin

paragraph3-7(fig.3-22).

-typebackandbackingweldsofsingle-grooveweldsshallbeshown

bymeansofthebackorbackingweldsymbol(fig.3-50).

toursymbolsforgroovewelds(F,fig.3-51)areindicatedin

thesamemannerasthatforfilletwelds(para3-21).

(1)Grooveweldsthataretobeweldedapproximatelyflushwithoutrecourtoanymethodoffinishing

shallbeshownbyaddingtheflushcontoursymboltotheweldsymbol,inaccordancewiththelocation

specificationsgiveninparagraph3-7(fig.3-52).

(2)Grooveweldsthataretobemadeflushbymechanicalmeansshallbeshownbyaddingtheflush

contoursymbolandtheur'sstandardfinishsymboltotheweldsymbol,inaccordancewiththelocation

specificationsgiveninparagraph3-7(fig.3-53).

(3)Grooveweldsthataretobemechanicallyfinishedtoaconvexcontourshallbeshownbyaddingboth

theconvexcontoursymbolandtheur'sstandardfinishsymboltotheweldsymbol,inaccordancewith

thelocationspecificationsgiveninpara3-7(fig.3-54).

BACKINGWELDS

l.

(1)Thebackorbackingweldsymbol(fig.3-50)mustbeudtoindicatebead-typebackorbacking

weldsofsingle-groovewelds.

(2)Backorbackingweldsofsingle-grooveweldsmustbeshownbyplacingabackorbackingweld

symbolonthesideofthereferencelineoppositethegrooveweldsymbol(fig.3-50).

(3)Ddesiredto

specifythedimensions,theymustbeshownonthedrawing.

toursymbols(fig.3-55)forbackorbackingwelds

areindicatedinthesamemannerasthatforfilletwelds(para3-21).

-THRUWELDS

l.

(1)Themelt-thrusymbolshallbeudwhereatleast100percentjointpenetrationoftheweldthrough

thematerialisrequiredinweldsmadefromonesideonly(fig.3-56).

(2)Melt-thruweldsshallbeshownbyplacingthemelt-thruweldsymbolonthesideofthereferenceline

oppositethegrooveweld,flange,tee,orcornerweldsymbol(fig.3-56).

(3)desiredtospecify

thedimensions,theymustbeshownonthedrawing.

toursymbolsformelt-thruweldsareindicatedinthesame

mannerasthatforfilletwelds(fig.3-57).

INGWELDS

l.

(1)Thesurfacingweldsymbolshallbeudtoindicatesurfacesbuiltupbywelding(fig.3-58),whether

builtupbysingle-ormultiple-passsurfacingwelds.

(2)Thesurfacingweldsymboldoesnotindicatetheweldingofajointandthushasnoarroworotherside

mbolshallbedrawnonthesideofthereferencelinetowardthereaderandthearrow

shallpointclearlytothesurfaceonwhichtheweldistobedeposited.

e(height)ofasurfacebuiltupbyweldingshallbeindicatedby

ensionsshall

alwaysbeonthesamesideofthereferencelineastheweldsymbol(fig.3-58).Whennospecificheight

ofwelddepositisdesired,nosizedimensionneedbeshownontheweldingsymbol.

,Location,eentireareaofaplaneor

curvedsurfaceistobebuiltupbywelding,nodimension,otherthansize,needbeshownonthewelding

aportionoftheareaofaplaneorcurvedsurfaceistobebuiltupbywelding,theextent,

location,andorientationoftheareatobebuiltupshallbeindicatedonthedrawing.

WELDS

l.

(1)Thefollowingweldingsymbolsareudforlightgagemetaljointsinvolvingtheflaringorflangingof

theedgestobejoined(fig.3-59).Thesymbolshavenoarroworothersidesignificance.

(2)Edgeflangeweldsshallbeshownbytheedgeflangeweldsymbol(A,fig.3-59).

(3)Cornerflangeweldsshallbeshownbythecornerflangeweldsymbol(B,fig.3-59).Incaswhere

thecornerflangejointisnotdetailed,abreakinthearrowisrequiredtoshowwhichmemberisflanged

(fig.3-59).

ionsofFlangeWelds.

(1)Dimensionsofflangeweldsareshownonthesamesideofthereferencelineastheweldsymbol.

(2)Theradiusandtheheightabovethepointoftangencymustbeindicatedbyshowingtheradiusand

height,paratedbyaplusmark,iusandheightmust

readinthatorderfromlefttorightalongthereferenceline(C,fig.3-59).

(3)Thesize(thickness)offlangeweldsmustbeshownbyadimensionplacedoutwardoftheflange

dimensions(C,fig.3-59).

(4)ificationofthisdimension

isdesired,itmustbeshownonthedrawing.

ngeweldsinwhichoneormorepiecesareinrtedbetweenthe

twoouterpieces,thesamesymbolshallbeudasforthetwoouterpieces,regardlessofthenumberof

piecesinrted.

ANCESPOTWELDS

ancespotweldsymbols(fig.3-3)havenoarroworothersidesignificancein

themlves,althoughsupplementarysymbolsudincon-junctionwiththemmayhavesuchsignificance.

ionsmaybeshownon

eithersideofthereferenceline.

ancespotweldsaredimensionedbyeithersizeorstrengthas

follows:

(1)Thesizeofresistancespotweldsisdesignatedasthediameteroftheweldexpresdinfractionsor

indecimalsinhundredthsofaninchandmustbeshown,withorwithoutinchmarks,totheleftofthe

weldsymbol(>fig.3-60).

(2)Thestrengthofresistancespotweldsisdesignatedastheminimumacceptableshearstrengthin

poundsperspotandmustbeshowntotheleftoftheweldsymbol(fig.3-61).

gofResistanceSpotWelds.

(1)Thepitchofresistancespotweldsshallbeshowntotherightoftheweldsymbol(fig.3-62).

(2)Whenthesymbolsareshowndirectlyonthedrawing,thespacingisshownbyusingdimensionlines.

(3)Whenresistancespotweldingextendslessthanthedistancebetweenabruptchangesinthedirection

oftheweldingorlessthanthefulllengthofthejoint,theextentmustbedimensioned(fig.3-63).

efinitenumberofweldsisdesiredinacertainjoint,the

numbermustbeshowninparentheitheraboveorbelowtheweldsymbol(fig.3-64).

eexpodsurfaceofonememberofaresistancespot

weldedjointistobeflush,thatsurfaceshallbeindicatedbyaddingtheflushcontoursymbol(fig.3-3)to

theweldsymbol,(fig.3-65)inaccordancewithlocationspecificationsgiveninparagraph3-7.

ANCESEAMWELDS

l.

(1)Resistanceamweldsymbolshavenoarroworothersidesignificanceinthemlves,although

suppanceamweld

symbolsmustbecenteredonthereferenceline.

(2)Dimensionsofresistanceamweldsmaybeshownoneithersideofthereferenceline.

anceamweldsmustbedimensionedbyeithersizeor

strengthasfollows:

(1)Thesizeofresistanceamweldsmustbedesignatedasthewidthoftheweldexpresdinfractions

orindecimalsinhundredthsofaninchandshallbeshown,withorwithoutinchmarks,totheleftofthe

weldsymbol(fig.3-66).

(2)Thestrengthofresistanceamweldsmustbedesignatedastheminimumacceptableshear

strengthinpoundsperlinearinchandmustbeshowntotheleftoftheweldsymbol(fig.3-67).

ofResistanceSeamWelds.

(1)Thelengthofaresistanceamweld,whenindicatedontheweldingsymbol,mustbeshowntothe

rightoftheweldingsymbol(fig.3-68).

(2)Whenresistanceamweldingextendsforthefulldistancebetweenabruptchangesinthedirection

ofthewelding,nolengthdimensionneedbeshownontheweldingsymbol.

(3)Whenresistanceamweldingextendslessthanthedistancebetweenabruptchangesinthe

directionoftheweldingorlessthanthefulllengthofthejoint,theextentmustbedimensioned(fig.3-69).

chofintermittentresistanceamweldingshallbe

designatedasthedistancebetweencentersoftheweldincrementsandmustbeshowntotherightofthe

lengthdimension(fig.3-70).

termittentresistanceamweldingis

udbyitlf,thesymbolindicatesthatincrementsarelocatedattheendsofthedimensionedlength.

Whenudbetweencontinuousresistanceamwelding,thesymbolindicatesthatspacequaltothe

pitchmintesymbols

mustbeudforintermittentandcontinuousresistanceamweldingwhenthetwoarecombined.

eexpodsurfaceofonememberofaprojectionweldedjoint

istobemadeflush,thatsurfaceshallbeindicatedbyaddingtheflushcontoursymbol(fig.3-3)tothe

weldsymbol,obrvingtheusuallocationsignificance(fig.3-79).

TIONWELDS

l.

(1)Whenusingprojectionwelding,thespotweldsymbolmustbeudwiththeprojectionwelding

tweldsymbolmustbecenteredonthe

referenceline.

(2)Embossmentsonthearrowsidememberofajointforprojectionweldingshallbeindicatedbyplacing

theweldsymbolonthesideofthereferencelinetowardthereader(fig.3-72).

(3)Embossmentontheothersidememberofajointforprojectionweldingshallbeindicatedbyplacing

theweldsymbolonthe-sideofthereferencelineawayfromthereader(fig.3-73).

(4)Proportionsofprojectionsmustbeshownbyadetailorothersuitablemeans.

(5)Dimensionsofprojectionweldsmustbeshownonthesamesideofthereferencelineastheweld

symbol.

ProjectionWelds.

(1)arprojectionweldsmaybedimensionedby

size.

(2)Thesizeofcircularprojectionweldsshallbedesignatedasthediameteroftheweldexpresdin

fractionsorindecimalsinhundredthsofaninchandshallbeshown,withorwithoutinchmarks,tothe

leftoftheweldsymbol(fig.3-74).

(3)Thestrengthofprojectionweldsshallbedesignatedastheminimumacceptableshearstrengthin

poundsperweldandshallbeshowntotheleftoftheweldsymbol(fig.3-75).

chofprojectionweldsshallbeshowntotherightoftheweld

symbol(fig.3-76).

efinitenumberofprojectionweldsisdesiredinacertainjoint,

thenumbershallbeshowninparenthes(F,fig.3-77).

eprojectionweldingextendslessthanthedistancebetween

abruptchangesinthedirectionoftheweldingorlessthanthefulllengthofthejoint,theextentshallbe

dimensioned(fig.3-78).

eexpodsurfaceofonememberofaresistance

amweldedjointistobeflush,thatsurfaceshallbeindicatedbyaddingtheflushcontoursymbol(fig.

3-3)totheweldsymbol,obrvingtheusuallocationsignificance(fig.3-71).

RUPSETWELDS

ruptweldsymbolshavenoarrowsideorothersidesignificanceinthemlves,

althoughsuppld

ionsneednotbe

shownontheweldingsymbol.

toursymbols(fig.3-3)forflashoruptwelds(fig.

3-80)areindicatedinthesamemannerasthatforfilletwelds(paragraph3-21).