Ukusetshenziswa kabanzi kwamapayipi ensimbi angenamthungo emikhakheni yezimboni nezokwakha kwenza amazinga awo nezidingo zekhwalithi kubaluleke kakhulu. Lokho okubizwa ngokuthi "ipayipi elijwayelekile kathathu" kubhekisela kumapayipi ensimbi angenamthungo ahlangabezana nezindinganiso ezintathu zomhlaba wonke, ngokuvamile okuhlanganisaI-API(I-American Petroleum Institute),I-ASTM(i-American Society for Testing and Materials) kanyeI-ASME(i-American Society of Mechanical Engineers). Lolu hlobo lwepayipi lensimbi lunokwethenjelwa okuphezulu kakhulu kanye nokuzivumelanisa nezimo ngenxa yezindinganiso zalo eziphakeme kanye nezitifiketi eziningi, futhi lusetshenziswa kabanzi ezimbonini ezifana namafutha, igesi yemvelo, amakhemikhali kanye nogesi.

Okokuqala, amapayipi ensimbi angenamthungo ajwayelekile e-API asetshenziswa kakhulu embonini kawoyela negesi, futhi amazinga awo ayinhloko yilawaI-API 5LfuthiI-API 5CTIzinga le-API 5L lihlanganisa izidingo zokukhiqiza zamapayipi okudlulisa ukuqinisekisa ukusebenza kwamapayipi ezindaweni ezicindezelayo, ezishisa kakhulu nasezindaweni ezigqwalisayo. Izinga le-API 5CT ligxile ekufakweni kwamafutha kanye namapayipi ukuqinisekisa amandla nokuqina kwamapayipi ngesikhathi sokubhoboza nokukhiqizwa. Amapayipi ensimbi angenamthungo ajwayelekile e-API avame ukuba namandla aphezulu, ukuqina okuphezulu kanye nokumelana okuhle nokugqwala.

Okwesibili, amapayipi ensimbi angenamthungo ajwayelekile e-ASTM amboza amasimu amaningi ezimboni, kufaka phakathi ama-boiler, ama-heat exchanger, izakhiwo zezakhiwo, njll.I-ASTM A106futhiI-ASTM A53 ziyizindinganiso ezimele. Ipayipi lensimbi elingenamthungo le-ASTM A106 lifanele ukusetshenziswa kwezinga lokushisa eliphezulu futhi lisetshenziswa kabanzi ezinhlelweni zamapayipi ezinokushisa okuphezulu ezitshalweni zamandla, ezindaweni zokuhluza kanye nasezitshalweni zamakhemikhali. Ipayipi lensimbi elingenamthungo le-ASTM A53 lifanele ukuthuthwa koketshezi olujwayelekile, okuhlanganisa amanzi, umoya kanye nomusi. Lezi zindinganiso zichaza ngokuqinile ukwakheka kwamakhemikhali, izakhiwo zemishini kanye nokubekezelelana kobukhulu bamapayipi ensimbi ukuqinisekisa ukuthembeka kwawo ezisetshenzisweni ezahlukene.

Okokugcina, amapayipi ensimbi angenamthungo ajwayelekile e-ASME asetshenziswa kakhulu kuma-boilers kanye nemikhumbi yokucindezela. I-ASME B31.3 kanye ne-ASME B31.1 yizindinganiso ezimbili ezibalulekile ezichaza izidingo zokuklama kanye nokukhiqiza kwezinhlelo zamapayipi ngaphansi kwengcindezi ephezulu kanye nezindawo zokushisa okuphezulu. Izinga le-ASME ligcizelela ukuphepha kanye nokusebenza kwesikhathi eside kwamapayipi ensimbi futhi lifaneleka ngezikhathi ezidinga ukuthembeka okuphezulu kakhulu kanye nokuphepha, njengezitshalo zamandla enuzi, izitshalo zamakhemikhali kanye nemishini emikhulu yezimboni.

Inzuzo yamapayipi asezingeni eli-3 itholakala ekuqinisekisweni kwawo okuningi kanye nokusebenza okubanzi. Ngenxa yokuthi ahlangabezana nezindinganiso ze-API, i-ASTM kanye ne-ASME ngesikhathi esisodwa, lolu hlobo lwamapayipi ensimbi angenamthungo lungahlangabezana nezidingo eziqinile zamazwe nezifunda ezahlukene futhi lufanelekela izimo zokusebenza eziyinkimbinkimbi ezahlukahlukene. Kungakhathaliseki ukuthi kungaphansi kokucindezeleka okuphezulu, izinga lokushisa eliphezulu noma indawo egqwalisayo, amapayipi asezingeni eli-3 angabonisa ukusebenza okuhle kakhulu ukuqinisekisa ukusebenza okuphephile nokuzinzile kohlelo.

Ngamafuphi, njengomkhiqizo osezingeni eliphezulu phakathi kwamapayipi ensimbi angenamthungo, amapayipi anezinga ezintathu abe yinto ebalulekile futhi ebalulekile emikhakheni yezimboni neyokwakha ngezitifiketi zawo eziningi ezijwayelekile kanye nokusebenza okuhle kakhulu. Ukusetshenziswa kwawo okubanzi akugcini nje ngokuthuthukisa ikhwalithi nokuphepha kwamaphrojekthi, kodwa futhi kukhuthaza intuthuko kanye nokusungula izinto ezintsha zobuchwepheshe bezinto zensimbi. Ukukhetha amapayipi anezinga ezintathu akugcini nje ngokuqinisekisa ikhwalithi, kodwa futhi nokuzibophezela ekuzinzeni nasekuphepheni kwesikhathi eside kwephrojekthi.