Izinhlobo zensimbi ezisetshenziswa emapayipini
Insimbi ye-carbon
I-Carbon steel yenza cishe u-90% wokukhiqizwa kwamapayipi ensimbi. Zenziwe ngamanani amancane wezakhi ze-alloying futhi ngokuvamile zisebenza kabi uma zisetshenziswa zodwa. Njengoba izici zabo zemishini nokusebenza kwazo kukuhle ngokwanele, zingaba nenani eliphansi futhi zingakhethwa ezinhlelweni ezinokucindezeleka okuphansi. Ukuntuleka kwezakhi ze-alloying kunciphisa ukufaneleka kwezinsimbi zekhabhoni zezinhlelo zokusebenza zokucindezela okuphezulu nezimo ezinzima, ngakho-ke ziba ziqinile uma zingaphansi kwemithwalo ephezulu. Isizathu esiyinhloko sokukhetha insimbi ye-carbon kumapayipi kungase kube ukuthi i-ductile kakhulu futhi ayiguquki ngaphansi komthwalo. Ngokuvamile zisetshenziswa embonini yezimoto nezasolwandle, kanye nezokuthutha zikawoyela negesi. I-A500, A53, A106, A252 amamaki e-carbon steel angasetshenziswa njengokuthungwa noma angenamthungo.

Izinsimbi Ezihlanganisiwe
Ukuba khona kwezakhi ze-alloying kuthuthukisa izakhiwo zemishini yensimbi, ngaleyo ndlela amapayipi aphikisana kakhulu nezicelo zokucindezeleka okuphezulu kanye nezingcindezi eziphezulu. Izakhi ezivamile zengxubevange ziyi-nickel, i-chromium, i-manganese, ithusi, njll. ezikhona ekwakhiweni okuphakathi kwamaphesenti angu-1-50 wesisindo. Amanani ahlukene wezinto ezixubile afaka isandla ekwakhekeni kwemishini namakhemikhali omkhiqizo ngezindlela ezihlukene, ngakho ukwakheka kwamakhemikhali ensimbi nakho kuyahlukahluka kuye ngezidingo zohlelo. Amapayipi ensimbi ye-alloy avame ukusetshenziswa ezimweni zomthwalo ophezulu nezingazinzile, njengasembonini kawoyela negesi, izindawo zokuhluza, amakhemikhali e-petrochemicals, nezitshalo zamakhemikhali.

Insimbi engagqwali
I-Stainless Steel nayo ingahlukaniswa emndenini wensimbi ye-alloy. Isici esiyinhloko se-alloying ensimbi engagqwali yi-chromium, isilinganiso sayo sihluka kusuka ku-10 kuya ku-20% ngesisindo. Injongo eyinhloko yokwengeza i-chromium ukusiza insimbi ithole izinto ezingenasici ngokuvimbela ukugqwala. Amapayipi ensimbi engagqwali avame ukusetshenziswa ezimeni ezinzima lapho ukumelana nokugqwala kanye nokuqina okuphezulu kubalulekile, njengasolwandle, ukuhlunga kwamanzi, imithi, nezimboni zikawoyela negesi. I-304/304L kanye ne-316/316L amamaki ensimbi engagqwali angasetshenziswa ekukhiqizeni amapayipi. Nakuba ibanga lama-304 linokumelana nokugqwala okuphezulu nokuqina; Ngenxa yokuqukethwe kwekhabhoni ephansi, uchungechunge lwe-316 lunamandla aphansi futhi lungashiselwa.

Insimbi Eyisithako
Ipayipi elakhiwe ngensimbi iyipayipi lensimbi elifakwe ungqimba lwezinc ukuvikela ukugqwala. I-zinc enamathelayo ivimbela izinto ezonakalisayo ukuthi zingagqwali amapayipi. Kwake kwaba wuhlobo oluvame kakhulu lwamapayipi okuphakela amanzi, kodwa ngenxa yomsebenzi nesikhathi esinqunywayo, ukuthungwa, nokufaka ipayipi likathayela, alisasetshenziswa kakhulu, ngaphandle kokuthi lisetshenziswa kancane ekulungiseni. Lezi zinhlobo zamapayipi zilungiswa kusuka ku-12 mm (0.5 amayintshi) kuya ku-15 cm (6 amayintshi) ububanzi. Atholakala ngamamitha angu-6 (amafidi angu-20) ubude. Kodwa-ke, ipayipi likathayela lokusabalalisa amanzi lisabonakala ezinhlelweni ezinkulu zokuhweba. Okunye okungalungile okubalulekile kwamapayipi anezinsimbi iminyaka yawo engama-40-50 yokuphila. Nakuba i-zinc imboza indawo engaphezulu futhi ivimbele izinto zangaphandle ekuphenduleni ngensimbi futhi zigqwale, uma izinto ezithwalayo zigqwala, ipayipi lingase liqale ukugqwala ngaphakathi. Ngakho-ke, kubaluleke kakhulu ukuhlola nokuthuthukisa amapayipi ensimbi ngezikhathi ezithile.