I-ASTM A53indinganiso yi-American Society for Testing and Materials. Indinganiso ihlanganisa izinhlobo ezahlukene zobukhulu bamapayipi kanye nobukhulu futhi isebenza ezinhlelweni zamapayipi ezisetshenziselwa ukuthutha amagesi, uketshezi kanye nolunye uketshezi. Amapayipi ajwayelekile e-ASTM A53 avame ukusetshenziswa ezindaweni zezimboni kanye nemishini, kanye nasembonini yokwakha ukuze kuhlinzekwe ngamanzi, kufudunyezwe futhi kufakwe izinhlelo zokupholisa umoya.

Ngokuvumelana neI-ASTM A53Ngokwezinga elijwayelekile, amapayipi angahlukaniswa ngezinhlobo ezimbili: Uhlobo F nohlobo E. Uhlobo F luyipayipi elingenamthungo kanti uhlobo E luyipayipi elihlanganisiwe ngogesi. Zombili izinhlobo zamapayipi zidinga ukwelashwa kokushisa ukuqinisekisa ukuthi izakhiwo zazo zemishini kanye nokwakheka kwamakhemikhali kuhlangabezana nezidingo ezijwayelekile. Ngaphezu kwalokho, izidingo zobuso bepayipi kufanele zihambisane nezinhlinzeko zezinga le-ASTM A530/A530M ukuqinisekisa ikhwalithi yokubukeka kwalo.

Izidingo zokwakheka kwamakhemikhali zamapayipi ajwayelekile e-ASTM A53 zimi kanje: okuqukethwe kwekhabhoni akudluli ku-0.30%, okuqukethwe kwe-manganese akudluli ku-1.20%, okuqukethwe kwe-phosphorus akudluli ku-0.05%, okuqukethwe kwesulfure akudluli ku-0.045%, okuqukethwe kwe-chromium akudluli ku-0.40%, kanye nokuqukethwe kwe-nickel akudluli ku-0.40%, okuqukethwe kwethusi akudluli ku-0.40%. Le mikhawulo yokwakheka kwamakhemikhali iqinisekisa amandla, ukuqina kanye nokumelana nokugqwala kwepayipi.

Ngokuphathelene nezakhiwo zemishini, indinganiso ye-ASTM A53 idinga ukuthi amandla okudonsa kanye namandla okukhiqiza amapayipi angabi ngaphansi kuka-330MPa kanye no-205MPa ngokulandelana. Ngaphezu kwalokho, izinga lokunwebeka kwepayipi nalo linezidingo ezithile zokuqinisekisa ukuthi alikwazi ukuphuka noma ukuguquka ngesikhathi sokusetshenziswa.

Ngaphezu kokwakheka kwamakhemikhali kanye nezakhiwo zemishini, indinganiso ye-ASTM A53 iphinde inikeze imithetho eningiliziwe ngobukhulu kanye nekhwalithi yokubukeka kwamapayipi. Ubukhulu bamapayipi busukela ku-1/8 intshi kuya ku-26 intshi, kanye nezinketho ezahlukahlukene zobukhulu bodonga. Ikhwalithi yokubukeka kwepayipi idinga indawo ebushelelezi ngaphandle kokubola okusobala, imifantu kanye namaphutha ukuqinisekisa ukuthi ngeke ivuze noma yonakale ngesikhathi sokufakwa nokusetshenziswa.

Ngokuvamile, indinganiso ye-ASTM A53 iyindinganiso ebalulekile yamapayipi ensimbi yekhabhoni. Ihlanganisa izidingo zokwakheka kwamakhemikhali, izakhiwo zemishini, ubukhulu kanye nekhwalithi yokubukeka kwamapayipi. Amapayipi akhiqizwa ngokwale ndinganiso angaqinisekisa ikhwalithi ezinzile kanye nokusebenza okuthembekile, futhi afanele izinhlelo zamapayipi emikhakheni eyahlukene yezimboni nezokwakha. Ukwakhiwa kanye nokusetshenziswa kwezindinganiso ze-ASTM A53 kubaluleke kakhulu ekuqinisekiseni ukusebenza okuphephile kwamapayipi kanye nokukhuthaza ikhwalithi yokwakhiwa kwephrojekthi.