Chithunzi cha ASTM A53muyezo ndi American Society for Testing and Materials. Muyezowu umakhudza kukula kwa mapaipi ndi makulidwe osiyanasiyana ndipo umagwira ntchito pamapaipi omwe amagwiritsidwa ntchito kunyamula mpweya, zakumwa ndi madzi ena. Mapaipi wamba a ASTM A53 amagwiritsidwa ntchito kwambiri m'mafakitale ndi makina, komanso m'makampani omanga popereka madzi, kutenthetsa ndi makina owongolera mpweya.

Malinga ndiChithunzi cha ASTM A53muyezo, mipope akhoza kugawidwa m'mitundu iwiri: Mtundu F ndi Mtundu E. Mtundu F ndi chitoliro chosasunthika ndi mtundu wa E ndi chitoliro chowotcherera chamagetsi. Mitundu yonse iwiri ya mapaipi imafuna chithandizo cha kutentha kuti zitsimikizire kuti makina awo ndi kapangidwe kake kamakwaniritsa zofunikira. Kuphatikiza apo, zofunikira zapaipi ziyenera kutsata zomwe zimaperekedwa ndi ASTM A530/A530M kuti zitsimikizire mawonekedwe ake.

Zomwe zimafunikira pamapaipi wamba a ASTM A53 ndi awa: zomwe zili ndi kaboni sizipitilira 0.30%, manganese sapitilira 1.20%, phosphorous sapitilira 0.05%, sulfure sapitilira 0.045%, chromium sichidutsa. 0,40%, ndi nickel zili osapitirira 0,40%, mkuwa zili si upambana 0,40%. Zoletsa zamitundu iyi zimatsimikizira kulimba, kulimba komanso kukana dzimbiri kwa payipi.

Pankhani yamakina, muyezo wa ASTM A53 umafunikira kuti mphamvu zamapope ndi zokolola za mapaipi sizichepera 330MPa ndi 205MPa motsatana. Komanso, elongation mlingo wa chitoliro amakhalanso ndi zofunika zina kuonetsetsa kuti si sachedwa kusweka kapena mapindikidwe ntchito.

Kuphatikiza pakupanga mankhwala ndi makina, muyezo wa ASTM A53 umaperekanso malamulo atsatanetsatane pakukula ndi mawonekedwe a mapaipi. Kukula kwa chitoliro kumachokera ku 1/8 inchi mpaka 26 mainchesi, ndi mitundu yosiyanasiyana ya makulidwe a khoma. Kuwoneka bwino kwa payipi kumafuna malo osalala popanda makutidwe ndi okosijeni odziwikiratu, ming'alu ndi zolakwika kuti zitsimikizire kuti sizingadutse kapena kuonongeka pakuyika ndi kugwiritsa ntchito.

Mwambiri, muyezo wa ASTM A53 ndi mulingo wofunikira wamapaipi achitsulo cha carbon. Zimakhudza zofunikira za mankhwala, makina, miyeso ndi maonekedwe a mapaipi. Mapaipi opangidwa molingana ndi muyezo uwu amatha kutsimikizira kukhazikika komanso magwiridwe antchito odalirika, ndipo ndi oyenera kugwiritsa ntchito mapaipi m'mafakitale osiyanasiyana ndi zomangamanga. Kupanga ndi kukhazikitsa miyezo ya ASTM A53 ndikofunikira kwambiri pakuwonetsetsa kuti mapaipi akuyenda bwino komanso kupititsa patsogolo ntchito yomanga.