ASTM A53Muyero wepasi rose ndiwo weAmerican Society for Testing and Materials. Muyero uyu unosanganisira saizi dzakasiyana-siyana dzemapaipi uye ukobvu uye unoshanda kumapaipi anoshandiswa kutakura magasi, zvinwiwa nezvimwe zvinwiwa. ASTM A53 muyero wepasi rose unoshandiswa zvakanyanya munzvimbo dzemaindasitiri nedzemakanika, pamwe chete nemuindasitiri yekuvaka masisitimu emvura, ekudziya uye ekutonhodza mhepo.

Maererano neASTM A53Pamwe chete, mapaipi anogona kukamurwa kuita mhando mbiri: Rudzi F neRudzi E. Rudzi F ipaipi isina musono uye rudzi E ipaipi yakasungirirwa nemagetsi. Mhando dzese dzemapaipi dzinoda kurapwa kwekupisa kuitira kuti hunhu hwadzo hwemakanika uye kuumbwa kwemakemikari zvienderane nezvinodiwa. Pamusoro pezvo, zvinodiwa pamusoro pepaipi zvinofanirwa kutevedzera zvinodiwa neASTM A530/A530M standard kuti ive nechokwadi chekuti inotaridzika zvakanaka.

Zvinodiwa pakuumbwa kwemakemikari mumapaipi eASTM A53 akajairika ndeizvi: huwandu hwekabhoni haupfuure 0.30%, huwandu hwemanganese haupfuure 1.20%, huwandu hwephosphorus haupfuure 0.05%, huwandu hwesarufa haupfuure 0.045%, huwandu hwechromium haupfuure 0.40%, uye huwandu hwenickel haupfuure 0.40%, huwandu hwemhangura haupfuure 0.40%. Izvi zvinorambidza kuumbwa kwemakemikari zvinovimbisa kusimba, kuomarara uye kuramba ngura kwepaipi.

Panyaya yehunhu hwemakanika, chiyero cheASTM A53 chinoda kuti simba rekudhonza uye simba rekuburitsa mapaipi zvive pasi pe330MPa ne205MPa zvichiteerana. Pamusoro pezvo, mwero wekureba kwepaipi une zvimwe zvinodiwa kuti ive nechokwadi chekuti haikanganisike kana kuputsika panguva yekushandiswa.

Pamusoro pekuumbwa kwemakemikari uye hunhu hwemakanika, chiyero cheASTM A53 chinopawo mitemo yakadzama pamusoro pehukuru uye chitarisiko chemapaipi. Saizi dzemapaipi dzinotangira pa 1/8 inch kusvika 26 inches, dzine sarudzo dzakasiyana-siyana dzekukora kwemadziro. Hunhu hwechitarisiko chepaipi hunoda nzvimbo yakatsetseka isina oxidation yakajeka, mitswe uye zvikanganiso kuti ive nechokwadi chekuti haizodonhedzi kana kukuvara panguva yekuisa nekushandisa.

Kazhinji, chiyero cheASTM A53 chinodiwa zvikuru pamapombi esimbi yekabhoni. Chinosanganisira zvinodiwa zvemakemikari, hunhu hwemakanika, saizi uye chitarisiko chemapaipi. Mapombi anogadzirwa zvichienderana nechiyero ichi anogona kuve nechokwadi chekuti akasimba uye anoshanda zvakanaka, uye akakodzera masisitimu emapaipi munzvimbo dzakasiyana dzemaindasitiri nekuvaka. Kuumbwa uye kushandiswa kwemazinga eASTM A53 kwakakosha zvikuru pakuona kuti mapaipi anoshanda zvakachengeteka uye kusimudzira mhando yekuvakwa kwepurojekiti.