法兰表面粗糙度标准.pdfVIP

法兰表面粗糙度标准

Englishversion:

Flangesurfaceroughnessstandardsarespecifiedin

variousindustrystandards,including:

AmericanNationalStandardsInstitute(ANSI):ANSI

B16.5,SurfaceTexture.

InternationalOrganizationforStandardization

(ISO):ISO25178,GeometricalProductSpecifications(GPS)

Surfacetexture:Areal.

DeutscheInstitutefürNormung(DIN):DIN4768,

Surfaceroughness.

Thestandardsdefinedifferentparametersfor

quantifyingsurfaceroughness,suchas:

Arithmeticaverageroughness(Ra):Theaverage

heightofthepeaksandvalleyswithinagivensampling

length.

Rootmeansquareroughness(Rq):Thesquareroot

ofthemeanofthesquaredheightdeviationswithinagiven

samplinglength.

Maximumheightoftheprofile(Rz):Thevertical

distancebetweenthehighestpeakandthelowestvalley

withinagivensamplinglength.

Therequiredsurfaceroughnessforaflangedependson

thespecificapplication.Forexample,flangesusedin

high-pressuresystemstypicallyrequireasmoothersurface

finishthanflangesusedinlow-pressuresystems.

Thesurfaceroughnessofaflangecanbecontrolledby

themanufacturingprocess.Forexample,grindingor

polishingcanbeusedtoachieveasmoothersurfacefinish.

Itisimportanttonotethatsurfaceroughnessisonly

onefactorthataffectstheperformanceofaflange.Other

factors,suchasthematerialoftheflangeandthetypeof

sealused,canalsoaffectperformance.

Chineseversion:

法兰表面粗糙度标准在各种行业标准中都有规定，包括：

美国国家标准协会(ANSI)，ANSIB16.5，表面纹理。

国际标准化组织(ISO)，ISO25178，几何产品规格(GPS)

表面纹理，面积。

德国标准化学会(DIN)，DIN4768，表面粗糙度。

这些标准定义了量化表面粗糙度的不同参数，例如：

算术平均粗糙度(Ra)，给定采样长度内峰谷的平均高度。

均方根粗糙度(Rq)，给定采样长度内高度偏差平方均值

的平方根。

轮廓的最大高度(Rz)，给定采样长度内最高峰和最低谷

之间