Waa maxay cabbirada magaca ee tuubada birta kaarboon?

Cabbirrada tuubooyinka birtainta badan waxaa lagu muujiyaa inch ama millimeters, iyo cabbirrada tuubooyinka birta iyo kala duwanaanta cabbirka waxay ku saleysan yihiin heerar iyo shuruudo kala duwan.Tusaale ahaan, gudaha Maraykanka, cabbirrada tuubooyinka birta waxay badanaa ku saleysan yihiinHeerarka ASTM, halka Yurub, cabbirada tuubooyinka birta ayaa raaci karaHeerarka EN.

Qiyaasaha cabbirka tuubooyinka birta sida caadiga ah waxaa ku jira dhexroorka dibadda, dhumucda derbiga, iyo dhererka.Dhexroorka dibadda inta badan waa mid ka mid ah heerarka cabbirka ugu caansan, halka dhumucda derbiga iyo dhererkaDhuumaha birtasidoo kale waa arrimo muhiim ah in la tixgeliyo marka la dooranayo birta saxda ah.Intaa waxaa dheer, markaad xisaabinayso miisaanka tuubooyinka birta, waxaad isticmaali kartaa xisaabiyaha miisaanka birta si aad si dhakhso ah oo sax ah u xisaabisomiisaanka tuubooyinka birta, taas oo aad u caawinaysa soo iibsiga alaabta iyo diyaarinta gaadiidka mashaariicda injineernimada.