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1、压力管道-国内标准(Pressurepipes-domesticstandards)ThisarticleiscontributedbywuhusihaicaiDOCdocumentsmayexperiencepoorbrowsingontheWAPside・ItisrecommendedthatyoufirstselectTXT,ordownloadthesourcefiletothelocalview.PressurepipelinePipesandequipmentareequallyimportantinpetrochemicalproduction.Therefore,
2、strengtheningtheuseandmanagementofpipelinesisalsoanimportsnttaskinachievingsafetyinproduction.Standardforoilandgaspipeline,pipeline,inabroadsense,includingthepipe(sectiongeometryfortheclosedloop,acertainwa11thicknessandlength,theshapeofuniformcomponent),pipefittings(includingpipefittings,valv
3、es,flanges,etc・)andanciliaryfacilities・(a)thenominaldiameter,accordingtotherequirements,accordingtocertainscientificlaws,artificiallyprescribedaseriesofstandarddiameter,knownasnominaldiameter・Nominaldiameterismarked:DN,XXXXnominaldiametervalue(mm),nominaldiametercode,suchasDN100,thatisnominal
4、diameterof100mmpipeanditssubsidiarycomponents,suchasvalves・TheoldnominaldiametercodeisDg.Commonlyusednominaldiameterseries,suchastable5-7.Tables5-7nominaldiameterseriestable15202532)(32)4050(65)65)80100125)(125)150200300350400450500600(650)650)700750800850)(850)900Unit:mm(950)950)(1050)110011
5、50)(1150)1200(1250)1250)13001350)(1350)14001450)(1450)150016001800200010001050Generally,thenominaldiameterisequaltotheinnerdiameterofthepipe・Accordingtonominaldiameterandnominalpressure,thestructure,sizeandconnectingthreadstandardsofpipes,valves,fittings,flangesandgasketscanbedetermined・(two)
6、nominalpressurePNXXXXnominalpressurevalue(MPa)NominalpressurecodeThenationalstandard(GB1042-90)providesthatthenominalpressureisindicatedas:PN4.0,thatis,thenominalpressureis4.OMPaofthepipeanditscomponents・Nominalpressurelevelseries,suchastable5-8・Tables5-8nominalpressureclassseries0.05,0.10,0.
7、25,0.40,0.60,0.80,1,1.6,2,2.5,4,5,6.3,10,,15,16,20,25Unit:MPa,2&32,42,50,63,80,100,125,,160,200,250,335(three)PSXXnumericaltestpressuretestpressure(MPa)testpressurepipelinecodebeforeitisputintouse,accordingtothedesignanduseoftheprocessrequire
