Ipayipi lensimbi engenamthungo i-API5L GRB iyinto esetshenziswa kakhulu yamapayipi ensimbi, asetshenziswa kakhulu kuwoyela, igesi nakwezinye izimboni. I-"API5L" yayo iyindinganiso eyakhiwe yi-American Petroleum Institute, futhi i-"GRB" ikhombisa izinga kanye nohlobo lwezinto ezibonakalayo, ezivame ukusetshenziselwa amapayipi okucindezela. Inzuzo yamapayipi ensimbi engenamthungo ilele ezindaweni zawo ezinhle kakhulu zemishini kanye nokumelana nokugqwala, futhi angasebenza ngokuzinza ezindaweni ezinokhahlo ezinokushisa okuphezulu nokucindezela okukhulu.

Izingxenye zamakhemikhali eziyinhloko ze-API5L GRB zamapayipi ensimbi angenamthungo zifaka ikhabhoni, i-manganese, isulfure, i-phosphorus, njll., futhi zinokushisela okuhle kanye nepulasitiki ngemuva kwenqubo eqinile yokwelapha ukushisa. Lolu hlobo lwamapayipi ensimbi luvame ukusetshenziselwa ukuthutha uketshezi namagesi, ikakhulukazi ekuxhashazweni nasekuthuthweni kwamasimu kawoyela negesi, ukuze kuqinisekiswe ukuphepha nokusebenza kahle.

I-ASTM A53, I-ASTM A106futhiI-API 5Lkukhona izindinganiso ezintathu ezivamile zamapayipi ensimbi angenamthungo, ngalinye lilungele izimo ezihlukene zohlelo lokusebenza.

Izinga le-ASTM A53 lisetshenziswa kakhulu emikhakheni efana namandla, ukwakhiwa kanye namakhemikhali e-petrochemicals. Ipayipi yensimbi yalesi simiso ifaneleka ukucindezela okuphansi kanye nezindawo zokushisa eziphansi, futhi ngokuvamile isetshenziselwa ukuthutha amanzi, igesi nokunye uketshezi. Inamandla amahle kanye nokushisela, futhi ifanele ukwenza amapayipi ahlukahlukene kanye nezingxenye zesakhiwo.

Izinga le-ASTM A106 ligxile kakhulu ekushiseni okuphezulu nasekufakweni kwengcindezi ephezulu futhi lilungele imboni kawoyela negesi. Amapayipi ensimbi angenamthungo aleli zinga asetshenziselwa ukuthuthwa kwe-steam, amanzi ashisayo namafutha. Bangakwazi ukugcina izakhiwo ezinhle zemishini emazingeni okushisa aphezulu ukuze kuqinisekiswe ukuphepha nokuzinza kwepayipi.

Izinga le-API 5L lenzelwe imboni kawoyela negesi futhi lifanele amapayipi okudlulisa ingcindezi ephezulu. Amapayipi ensimbi angenamthungo ahlangabezana naleli zinga anokumelana nokugqwala okuhle kakhulu nokumelana nokucindezela, okuqinisekisa ukusebenza okuphephile ngaphansi kwezimo ezimbi kakhulu. Amapayipi e-API 5L avame ukusetshenziswa ekuxhashazweni nasekuthuthweni kwezinkundla zikawoyela negesi ukuze kuqinisekiswe ukuthuthwa koketshezi ngendlela efanele.

Lezi zindinganiso ezintathu zamapayipi ensimbi angenasici zinezici zazo, ezihlanganisa izimo ezihlukahlukene zohlelo lokusebenza kusukela ekucindezelweni okuphansi kuya ekucindezelweni okuphezulu, kusukela ekushiseni okuphansi kuya ekushiseni okuphezulu, ukuhlangabezana nezidingo ezahlukene zezimboni, nokuhlinzeka ngeziqinisekiso zokuphepha nokusebenza kahle.