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经典图书 SECTION4MANUFACTURINGREQUIREMENTS,DIMENSIONSANDTOLERANCES
生产要求,尺寸和公差
4.1DIMENSIONSANDTOLERANCES尺寸和公差
4.1.1Thicknessofflange法兰厚度
ThedimensionsforthethicknessofflangesshallbeasspecifiedinAppendixBwitha
toleranceof+(3+0.05T),0mm.–
法兰的厚度应按照附录B,公差为+(3+0.05T),0mm.–
NOTE:ToachievethesurfacerequirementsofClause4.3itmaybenecessarytomachinethe
contactsurfaceaftertheflangehasbeenweldedorbrazedtotheparentarticle.Suchcasesmay
necessitateamachiningallowanceintheoriginalthickness.
注释:为了达到4.3条的表面光洁度要求,有必要在法兰焊接到母材上面后对接触面进行机加工。
这种情况有必要对原先的厚度留有加工余量。
4.1.2Outsidediameterofflange
法兰外径
ThedimensionsfortheoutsidediameterofflangesshallbeasspecifiedinAppendixBand
althoughatoleranceisnotspecifiedinthisStandardtheminimumdiametershallprovide
sufficientbearingareaforthenutorbolthead(seeClause4.3).
NOTE:OutsidediametersinaccordancewithAS/NZS4331(allparts)areacceptable.
法兰外径尺寸要按照附录B执行,虽然在本标准中没有指定公差范围,但是提供的最小直径应为螺母或螺栓头通过。(见4.3条)
注释:所有零件的外径尺寸符合AS/NZS4331即为合格。
4.1.3O-ringgroove
O型槽
ThedimensionsfortheO-ringgrooveshallbeasspecifiedinAppendixBwiththe
followingtolerances:
O型槽的尺寸应符合下列附录B中规定的的公差:
(a)X...............................................................................................................0.5mm.±
(b)W...............................................................................................................0.5mm.±
(c)r0...............................................................................................................0.1mm.±
(d)r1...............................................................................................................0.2mm.±
Dimensionsandtolerancesshallapplyaftertheapplicationofcoatings.
尺寸和公差同样适用于喷漆后。
4.1.4Heightofraisedface
凸起面的高度
ThedimensionsfortheheightofraisedfaceshallbeasspecifiedinAppendixB,withthe
followingtolerances:
凸起面的高度尺寸应符合下列附录B中规定的公差:
(a)2mm.................................................................................................+1.0,1.0mm.-
(b)3mm.................................................................................................+1.5,2.0mm.-
(c)4mm.................................................................................................+2.0,3.0mm.-
(d)5mm.................................................................................................+2.5,4.0mm.-
4.1.5Diameterofraisedface
凸起面直径
ThedimensionsforthediameterofraisedfaceshallbeasspecifiedinAppendixB,withthe
followingtolerances:
凸起面直径尺寸应符合下列附录B中规定的公差:
(a)FlangeslessthanorequaltoDN100.................................................+2.0,4.0mm.–
法兰凸起直径小于等于DN100的
(b)FlangesgreaterthanDN100butlessthanorequaltoDN300............+2.0,4.5mm.–
法兰凸起直径大于DN100但是小于等于DN300之的
(c)FlangesgreaterthanDN300butlessthanorequaltoDN600............+2.0,5.0mm.–
法兰凸起直径大于DN300但是小于等于DN600之的
(d)FlangesgreaterthanDN600butlessthanorequaltoDN1200..........+2.0,5.5mm.–
法兰凸起直径大于DN600但是小于等于DN1200之的
4.1.6Boltholes螺栓孔
ThedimensionsfortheboltholesshallbeasspecifiedinAppendixB,withthefollowing
tolerances:
螺栓孔的尺寸应符合下列附录B中规定的公差:
(a)Thepitchcirclediameter:
节距圆直径
(i)M12toM24inclusiveM12toM24(包括M24)的螺栓......................................1.5mm.±
(ii)M27andlarger.大于M27的螺栓.........................................................................2.0mm.±
(b)Thecentre-to-centrespacingofadjacentboltholes调整螺栓孔的中心间距:
(i)M12toM24inclusiveM12toM24(包括M24)的螺栓.....................................0.75mm.±
(ii)M27andlarger大于M27的螺栓.....................................................................1.0mm.±
(c)Thediameterofboltholes..螺栓孔的直径...............................................................+1.5,0.5mm.-
Dimensionsandtolerancesshallapplyafterapplicationofcoatings.
尺寸和公差同样适用于喷漆后。
Boltholesshallbe—
螺栓孔应:
(a)drilledorcoredandspacedequallyaroundthepitchcircle,whichisconcentricwith
thebore;
螺栓孔应为钻孔,均匀的分布在节距圆上,并与孔同心;
(b)paralleltotheaxisoftheflange;and
与法兰轴平行
(c)forintegralflanges,locatedoffthecentre-linesandwheretherearetwoormoreconcentricflanges,theyshallbealigned.
对于整体法兰,位于中心线外两个或更多个的同心法兰要在一条直线上
4.2CONTACTSURFACES接触表面
4.2.1General总述
ThecontactsurfacesforflangefacesandO-ringgroovesshallbemachinedorotherwise
finishedsothattheflatnessandsquarenesstotheaxisandthesurfacefinishareappropriate
tothetypeofgasketorO-ringused.FlangecontactsurfacesshallnotberougherthanN10
(Ra=12.5μm)andtheannulusthatmakescontactwithO-ringsshallnotberougherthanN8
(Ra=3.2μm),inaccordancewithAS2382.
对于法兰和O型槽的接触面需进行机加工,除非成型后与轴和完成表面的平面度和垂直度符合使用的垫片或O型垫片。法兰接触面的粗糙度小于N10(Ra=12.5μm),与O型圈接触的环面的粗糙度小于N8(Ra=3.2μm)(Ra应该是RADIUS半径的意思),按照AS2382的要求要。
4.2.2Toleranceonflatness平面度公差
Thetoleranceonflatnessacrosstheflangefaceshallbeasfollows:
法兰截面的平面度公差应符合如下公差要求:
(a)FlangesofnominalsizelessthanorequaltoDN250..................................0.2mm.±
法兰公称尺寸小于等于DN250
(b)FlangesofnominalsizegreaterthanDN250...............................................0.5mm.±
法兰公称尺寸大于DN250
Dimensionsandtolerancesshallapplyaftertheapplicationofcoatings.
尺寸和公差同样适用于喷漆后。
下面是客人要求的。
ToleranceasperAS4087specificationemailedpreviuosly,buttolerancemustbeminus0andsayplus1mmforthicknessandidandod.Holes&PCDasnominated,0tolerance.GramphonefinishonfaceasperAS4087.
公差按照先前邮件中的AS4087标准的规定,但是对于厚度,指定的孔和节距圆直径的内径和外径的公差必须为-0/+1mm。表面粗糙度按照AS4087标准要求。 |
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