國際標(biāo)準(zhǔn)焊接符號(ISO 2553)

國際標(biāo)準(zhǔn)焊接符號(ISO2553)

InternationalStandardWeldingSymbols(ISO2553)

1.BasicJointTypesandCombinationSymbols

JointTypeGraphicRepresentation:

I

V

HV

Y

HY

U

X

K

2.SurfaceShapeAuxiliarySymbols

SurfaceShapeAuxiliarySymbols:

Concave︶

Convex︵

Flat—

3.WeldingAuxiliarySymbols

Symbolrepresents:Weldingonthebackofthejointafterrootpasscleaning.

Symbolrepresents:Machiningthesurfaceoftheweldtomakeitflat.

Symbolrepresents:

Symbolrepresents:Nogapbetweentheweldandthebasemetal,andmachiningisnecessaryifneeded.

Symbolrepresents:Usingfillermaterial(cannotberemovedafterwelding).

Symbolrepresents:Usingbackingmaterial(canberemovedafterwelding).

Symbolrepresents:Circulardistributionangleweld(peripheralweld).

Symbolrepresents:On-siteinstallationweld.

4.WeldMarkingMethod

1.Explanation

①Thearrowlineandbaselineareconnectedatacertainangle.Forweldsthatrequirebevelingbeforewelding,thearrowlinecanbeused.Thearrowalwayspointstothesurfacethatneedstobeprocessed.②Thebaselineismostlymarkedparallelly,andinsomespecialcases,itcanbemarkedvertically.③Theweldsymbolcanbemarkedaboveorbelowthebaseline.Usethesamemarkingmethodasmuchaspossibleononedrawing.

2.One-SidedWeldingSeamRepresentation

▲Weldseamisonthesideindicatedbythesymbol(asshowninFigure1)

Iftheweldsymbolisonthesolidlinesideofthebaseline,theweldisonthesidepointedtobythearrowline.

(Figure1)

▲Weldseamisonthebacksideindicatedbythesymbol(asshowninFigure2)

Iftheweldsymbolisonthedottedlinesideofthebaseline,theweldisonthebacksidepointedtobythearrowline.

(Figure2)

3.Double-SidedWeldSeam

Combinationweldscanbeusedtorepresentdouble-sidedweldswithoutusingdottedlines(asshowninFigure3).

(Figure3)

4.OtherSymbolRepresentations

▲Thethicknessoftheweldisindicatedontheleftsideofthesymbol,andthelengthisindicatedontherightside.▲Thethicknessoftheweldcanberepresentedintwoways:①usingtheweldthickness,②usingtheweldleglength.▲Generally,thethicknesssymbolofthefilletweldonlymarksasinglenumber,and"a"or"z"isnotaddedbeforethenumber.Accordingtoconvention,thisnumberrepresentstheweldthickness(throat)size.

a=weldthicknessz=weldleglength

z=a.25,intermittentweldingfilletweld

▲Explanation:

①Theintermittentweldingfilletweldmarkingisintroducedbythelengthdescription.

nrepresentsthenumberofwelds.

Lrepresentsthelengthofasingleweld.

erepresentsthegapbetweenwelds.

②Examples:

A.Intermittentweldingfilletweldononeside.

B.Intermittentweldingfilletweldonbothsidessymmetrically.

C.Intermittentfilletweldsarrangedinstaggeredpatternonbothsides.

6.AdditionalExplanation

Inadditiontothesymmetricalweldexplanationmentionedabove,someadditionalexplanationscanalsobemarkedontheendofthebaselineandwithint